WO2010000883A1 - Self-ligating plastic braces with variable clip-on covers and manufacturing process - Google Patents

Self-ligating plastic braces with variable clip-on covers and manufacturing process Download PDF

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Publication number
WO2010000883A1
WO2010000883A1 PCT/ES2008/000477 ES2008000477W WO2010000883A1 WO 2010000883 A1 WO2010000883 A1 WO 2010000883A1 ES 2008000477 W ES2008000477 W ES 2008000477W WO 2010000883 A1 WO2010000883 A1 WO 2010000883A1
Authority
WO
WIPO (PCT)
Prior art keywords
clip
self
cover
base
covers
Prior art date
Application number
PCT/ES2008/000477
Other languages
Spanish (es)
French (fr)
Inventor
Alberto Cervera Sabater
Alberto Jose Herrero Zabaleta
Jose Ignacio Esmoris Arrillaga
Roberto OÑATE GUTIERREZ
Original Assignee
Euroortodoncia, S.L.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Euroortodoncia, S.L. filed Critical Euroortodoncia, S.L.
Priority to PCT/ES2008/000477 priority Critical patent/WO2010000883A1/en
Publication of WO2010000883A1 publication Critical patent/WO2010000883A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
    • A61C7/12—Brackets; Arch wires; Combinations thereof; Accessories therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
    • A61C7/12—Brackets; Arch wires; Combinations thereof; Accessories therefor
    • A61C7/125—Mouth tissue protecting means, e.g. bracket caps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
    • A61C7/12—Brackets; Arch wires; Combinations thereof; Accessories therefor
    • A61C7/28—Securing arch wire to bracket
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
    • A61C7/12—Brackets; Arch wires; Combinations thereof; Accessories therefor
    • A61C7/28—Securing arch wire to bracket
    • A61C7/30—Securing arch wire to bracket by resilient means; Dispensers therefor

Definitions

  • the object of the present invention is the construction of a plastic Bracket or other self-linked materials with variable clip-covers and consisting of two specially designed parts or pieces.
  • the base has a groove to receive the wire arch that after being inserted into the groove, is fixed by a clip-cover to secure its position, thus completing the application of the bracket.
  • This base also has a self-centering pivot that attaches to an existing centering cavity in the cover-clip to facilitate the perfect positioning of the two pieces of the bracket, base and cover-clip, so that it can never be put, the clip-cover, in a wrong position.
  • the base adheres to the tooth by mechanical retention.
  • the lids-clips can be removed and exchanged and have also been designed with different shapes and sizes.
  • apart from the fins, hooks or hooks can be included to hold elastic and auxiliary devices. Clip covers are changed during orthodontic treatment at the discretion of the orthodontist either to replace worn ones or to modify
  • the covers-clips can be transparent or pigments can be added to create cover-clips of various colors.
  • brackets for use in orthodontic, self-ligating treatment which does not require ligatures or elastic, customary in orthodontics for its fixation, manufactured by microinjection in various materials, among other thermoplastics based on polysulfone (psu) or polyether ether (peek).
  • the orthodontic brackets used for the correction of malocclusions and other dental defects have evolved from their original conception, thus emerging, with varied success, different versions such as self-ligating brackets, various materials have also been used in the manufacture thereof, including Ia ceramic, (eg crystalline mono sapphire), and plastic, among others.
  • plastic offers economic advantages and favorable aesthetic properties, since due to their natural colors they turn out to be more discreet, which is an important criterion for many patients when selecting an orthodontic treatment based on brackets.
  • plastic brackets present some technical challenges in relation to metallic and ceramic ones.
  • plastics are used in the manufacture of products for sanitary purposes, whereby their compatibility with the patient's health is proven.
  • these materials are used without being combined with others, so as to maintain the uniformity of physical and chemical properties throughout the structure of the bracket.
  • cementation of the bracket to the tooth and the corresponding mechanical retention it is solved by means of a design of the base of the bracket that consists of several horizontal grooves, described in the patent of this same inventor; PLASTIC BRACKET WITH MECHANICAL RETENTION
  • bracket is of the self-ligating type and by its design, its use is facilitated by the orthodontist.
  • the action of the bracket as passive is preferred by the orthodontists for the initial phases of the orthodontic correction or other particular cases, thus being the ideal bracket, since it provides for the versatility of both techniques, the passive and the active according to the need. That is why it is useful to have a range of cover-clips, so that the orthodontist can choose the most effective cover-clip for each case.
  • US 5,295,824 discusses plastic brackets, including polysulfone as an option. These are chemical retention because they require a layer to prepare the bracket for adhesion to the tooth. Claim the adhesives of the first retention layer. It has no self-centering pivot base or clip-cap with centering cavity.
  • Patent 5,738,513 presents self-ligating plastic brackets. Unlike that of the present invention, in which the bracket consists of two parts, it is composed of three parts, one of which is adjusted to establish the position of the arc wire.
  • the base does not have a self-centering pivot or a cover-clip with centering cavity to facilitate its perfect positioning.
  • the bracket of the present invention represents an improvement due to its versatility.
  • the bracket is made of microinjectable thermoplastic material in its entirety, based on polysulfone or polyether ether, peek, and consists of two pieces; a base and an interchangeable cover-clip.
  • the base is characterized by having a self-centering pivot that has projections on each wall of the two that make up the groove. Said projections are part of the closing clip and will engage with the projections of the clip-cover, the other part of the clip, constituting a quick and safe closure. All these details will be indicated in the accompanying drawings in this document.
  • the two walls that make up the self-centering pivot of the base have the function to more strongly secure the closure of the groove with clip-cover, thus, if under any circumstance the wire arch tries to leave the groove, it would press on the part inside the walls of the base of the groove, and therefore the closure of the groove would be further secured, by pressing the centering cavity of the cover-clip on the inner part.
  • the cover-clip thanks to a small recess that has in its centering cavity, facilitates its positioning and by the design of the self-centering pivot of the base, it makes it possible to give an erroneous position, of placement, of the cover-clip.
  • the clip-cover is also easier to apply than in other clip closures, since it is achieved by simple sliding, by a slight pressure on the self-centering pivot of the base, the clip closure constituting the self-ligating being made.
  • the present invention proposes a self-ligating plastic bracket with variable clip-covers, composed of two pieces:
  • -a base that has a self-centering pivot, which is constituted on one side by two walls that have a projection that is part of the clip, and on the opposite side, of this base, is the surface that adheres to the tooth by mechanical retention .
  • -And a cover-clip that is interchangeable, with which the bracket is given versatility by being able to alternate between the active and passive action according to the stage of the treatment in which a patient or other factors are found.
  • This cover-clip has been designed with a centering cavity to facilitate its perfect positioning with the base and thus forming the perfect union of both pieces that make up the bracket.
  • a self-ligating bracket is obtained, which can be made, among others, in transparent polysulfone material with equal effectiveness to a self-ligating metallic or ceramic bracket, with an aesthetic superiority, with respect to these and with the possibility in addition to switching between active and passive bracket action.
  • Another important step to ensure the quality of the piece is the simulation of the injection molding thereof.
  • the objectives regarding injection molding of the base are;
  • the part is not suitable for injection molding, it is modified and another iteration of the described process is started, until a base is obtained that satisfies the functional requirements and that lends itself to microinjection molding without inconvenience.
  • the possibility of varying the shape and size of the clip cover is a great advance, since it allows varying the aesthetics and the action of the bracket, with which the orthodontist chooses the most appropriate one according to the type of treatment desired.
  • the self-centering pivot of the base due to its configuration, once the cover-clip is placed, Ia locks laterally preventing its sliding, thanks to the walls that make up the self-centering pivot, are introduced into the centering cavity of the Ia clip-cover
  • Another function of the self-centering pivot of the base is to prevent the groove formed by both walls and that constitute the groove from opening when the wire arc tries to exit, since the wire arc will exert a force on the internal parts of the walls that form the groove making the closure stronger, by pressing the walls of the self-centering pivot on the walls of the cover-clip.
  • clip-cap molds with hooks or hooks can be designed to fix elastic ligatures or other auxiliary orthodontic elements.
  • the problem solved by the present invention is that of providing a self-ligating plastic bracket to which different caps-clips can be changed and that vary the action of the bracket, going from passive to active or vice versa.
  • Figure 1 shows a perspective of the self-ligating bracket with variable clip-covers, object of the present invention, where it is indicated with the number (1) the base, with the number (2) the cover-clip and with the number (3) the section of the wire arch is appreciated.
  • Figure 2 shows a section of the self-ligating bracket with variable clip-covers, with the same numbering as in the previous figure, the section of the base can be seen with the number (1), with the (2) the section of the cover-clip and with (3) the section of the wire arch, which is housed in the groove (13) of the base (1) and which is closed by means of the cover-clip (2), by the clip formed by the hooks (14) of the base (1) and (24) of the cover-clip (2), these hooks formed (14) and (24), in the walls (15) of the base (1) and of the walls (25) of the cover-clip (2).
  • Figure 3 is a section of the base, where you can see the centering pivot (16), which protrudes from the walls (15) that form the groove (13).
  • the coupling (14) of the base (1) and the grooves (12) are also observed.
  • Figure 4 represents a perspective of the base, where the walls (15) of the base (1) and the self-centering pivot (16) are well appreciated, the groove (13) is also distinguished, where the wire arc will be housed (3), not represented here.
  • Figure 5 represents a perspective of the cover-clip where the centering cavity (28) of the cover-clip is distinguished, which, as it should coincide with the self-centering pivot of the base, forms small recesses (27) in the walls (25) of the cover-clip so that there is never room for possible errors of placing the cover-clip in the base of the bracket, this is best seen in Figure 7.
  • Figure 6 is a bottom view of a perspective of the cover-clip, in which the recesses (27) of the centering cavity (28) of the cover-clip are distinguished, in the walls of the cover-clip.
  • Figure 7 represents a cover-clip, which makes the action of the bracket active, thanks to the protrusion (25) the degrees of freedom of the wire arch are eliminated, preventing any relative movement of the wire arch with respect to the bracket, by What will be the bracket who absorbs the tensions, accommodating and therefore its action will be active.
  • a clip-clip has been represented that makes the action of the bracket passive, since all the tensions will be absorbed by the wire arc, since the clip-clip in the closing part of the groove is smooth, the wire arch can move freely inside the groove. This movement of the wire arch is the one that absorbs the possible tensions and therefore the action of the bracket will be passive.
  • Figure 9 shows a perspective of a cover-clip, in which the injection point (211) of the thermoplastic material is appreciated.
  • the present invention proposes a self-ligating plastic bracket with variable clip-covers manufactured by microinjection, consisting of two parts: a base and a clip-cover. Both pieces are made of thermoplastic material based on polysulfone or polyetheretherketone (peek), in its entirety.
  • the variables that have been considered to achieve the bracket of the present invention are: manufacturing material, bracket size, design and its manufacturing process.
  • the materials chosen have been thermoplastics that allow the microinjection process and that also meet the aesthetic and mechanical resistance, chemical stability and heat resistance needs, as well as their biological tolerance, already proven in other medical devices. For this reason, a preferred embodiment has been made in thermoplastics based on polysulfone or polyether ether (peek).
  • the bracket of the present invention is represented in Figures 1, 2, 3 4, 5 and 6 and consists of two elements, the base (1) that joins the tooth mechanically through the grooves (12) and contains, this base ( 1) the groove (13) that forms the two walls (14), where the wire arch (3) is housed.
  • the self-centering pivot (16) of the base (1) will guide the cover-clip (2), which will be introduced therein and without the possibility of error thanks to the cavity (26) of autoguiding of the clip-cover (2) and the recesses (27) in that cavity (26) of guiding the clip-cover (2).
  • the hooks (24) of the walls (25) of the clip-cover (2) will form the clip closure with the hooks (14) of the walls (15) of the base (1), thus closing the clip-cover (2) the groove (13) that houses the wire arch (3).
  • Some fins (21) are provided in some designs of the cover-clip (2) to place elastic ligatures, chains or other auxiliary orthodontic devices.
  • thermoplastics have been used based on polysulfone or polyetheretherketone (peek) and based on their physical and chemical properties, the necessary tests have been carried out to calculate the appropriate dimensions of the bracket so that it has a resistance to deformation and a suitable resistance to breakage.
  • the position of the microinjection entrance door had to be changed, to obtain a laminar structure of the material and achieve maximum resistance in the critical area of the clip-clip, thus avoiding possible cracks or breakage of the same.

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

Self-ligating plastic braces with variable clip-on covers and manufacturing process, made of plastic or other thermoplastic materials and comprising two parts: - The base (1), which is fixed to the tooth. - The clip-on cover (2). The base has a groove to hold the arch wire (3), which is affixed using a clip-on cover. This base has a self-centring pivot that connects to a centring cavity in the clip-on cover. The clip-on covers have been designed in different shapes and sizes. They are changed throughout the course of the orthodontic treatment to replace worn clip-on covers or to change the action of the braces, from passive to active and vice versa. The clip-on covers may be transparent or pigment may be added thereto to create different coloured clip-on covers.

Description

BRACKET DE PLÁSTICO AUTOLIGADO CON TAPAS-CLIP VARIABLES AUTOLIGATED PLASTIC BRACKET WITH VARIABLE CLIP COVERS
Y PROCESO DE FABRICACIÓNAND MANUFACTURING PROCESS
OBJETO DE LA INVENCIÓNOBJECT OF THE INVENTION
El objeto de Ia presente invención es Ia construcción de un Bracket de plástico u otros materiales auto ligado con tapas-clip variables y que consta de dos partes o piezas especialmente diseñadas.The object of the present invention is the construction of a plastic Bracket or other self-linked materials with variable clip-covers and consisting of two specially designed parts or pieces.
- La base.- Base.
- Y Ia tapa-clip.- And the cover-clip.
La base tiene un surco para recibir el arco de alambre que después de ser insertado en el surco, se fija mediante una tapa-clip para asegurar su posición, completando así Ia aplicación del bracket. Esta base dispone además, de un pivote de autocentrado que acopla a una cavidad de centrado existente en Ia tapa-clip para facilitar el perfecto posicionamiento de las dos piezas del bracket, base y tapa-clip, de manera que nunca se pueda poner, Ia tapa-clip, en una posición errónea.The base has a groove to receive the wire arch that after being inserted into the groove, is fixed by a clip-cover to secure its position, thus completing the application of the bracket. This base also has a self-centering pivot that attaches to an existing centering cavity in the cover-clip to facilitate the perfect positioning of the two pieces of the bracket, base and cover-clip, so that it can never be put, the clip-cover, in a wrong position.
La base se adhiere al diente mediante retención mecánica.The base adheres to the tooth by mechanical retention.
Las tapas-clips se pueden quitar e intercambiar y también se han diseñado con diferentes formas y tamaños. Además, aparte de las aletas, se pueden incluir ganchos o hooks para sujeción de elásticos y dispositivos auxiliares. Las tapas-clip se cambian a Io largo del tratamiento ortodóncico a discreción del ortodoncista bien para reemplazar las desgastadas o bien para modificarThe lids-clips can be removed and exchanged and have also been designed with different shapes and sizes. In addition, apart from the fins, hooks or hooks can be included to hold elastic and auxiliary devices. Clip covers are changed during orthodontic treatment at the discretion of the orthodontist either to replace worn ones or to modify
Ia acción o comportamiento del bracket de acuerdo a Ia etapa del tratamiento ortodóncico.The action or behavior of the bracket according to the stage of orthodontic treatment.
Las tapas-clips pueden ser transparentes o se pueden añadir pigmentos para crear tapas-clips de diversos colores.The covers-clips can be transparent or pigments can be added to create cover-clips of various colors.
Por todo Io anterior se puede variar tanto Ia acción del bracket como el aspecto estético del mismo. ANTECEDENTES DE LAINVENCIÓNThroughout the above, both the action of the bracket and its aesthetic appearance can be varied. BACKGROUND OF THE INVENTION
Se trata de un bracket para uso en tratamiento ortodoncico, autoligado, que no requiere ligaduras o elásticos, habituales en ortodoncia para su fijación, fabricado por microinyección en diversos materiales, entre otros termoplásticos en base polisulfona (psu) o polietereterquetona (peek). Los brackets ortodoncicos utilizados para Ia corrección de maloclusiones y otros defectos dentales, han evolucionado desde su concepción original, surgiendo así, con éxito variado, diferentes versiones como los brackets autoligados, también se han empleado diversos materiales en Ia fabricación de los mismos, incluyendo Ia cerámica, (v.g. zafiro mono cristalino), y plástico, entre otros. De estos materiales de fabricación el plástico ofrece ventajas económicas y propiedades estéticas favorables, ya que por sus colores naturales resultan ser más discretos, Io cual es un criterio importante para muchos pacientes en el momento de seleccionar un tratamiento ortodoncico basándose en brackets. Sin embargo, los brackets de plástico presentan algunos retos técnicos en relación a los metálicos y de cerámica.It is a bracket for use in orthodontic, self-ligating treatment, which does not require ligatures or elastic, customary in orthodontics for its fixation, manufactured by microinjection in various materials, among other thermoplastics based on polysulfone (psu) or polyether ether (peek). The orthodontic brackets used for the correction of malocclusions and other dental defects, have evolved from their original conception, thus emerging, with varied success, different versions such as self-ligating brackets, various materials have also been used in the manufacture thereof, including Ia ceramic, (eg crystalline mono sapphire), and plastic, among others. Of these manufacturing materials, plastic offers economic advantages and favorable aesthetic properties, since due to their natural colors they turn out to be more discreet, which is an important criterion for many patients when selecting an orthodontic treatment based on brackets. However, plastic brackets present some technical challenges in relation to metallic and ceramic ones.
Entre estos retos, está el de lograr una retención mecánica adecuada, ya que por Ia suavidad y uniformidad final de Ia superficie del bracket carece de un relieve adecuado para una sujeción al diente fuerte y segura, cuando se cementa a éste. Otros de los retos que presenta el uso de plástico es Ia posible deficiencia en cuanto a dureza y resistencia a Ia rotura y su susceptibilidad a Ia hidrólisis y al cambio de color con el paso del tiempo.Among these challenges, is that of achieving adequate mechanical retention, since due to the softness and final uniformity of the surface of the bracket it lacks a suitable relief for a strong and secure attachment to the tooth, when it is cemented to it. Other challenges presented by the use of plastic is the possible deficiency in terms of hardness and resistance to breakage and its susceptibility to hydrolysis and color change over time.
Una vez resueltos estos problemas, a través de Ia elección de un material plástico adecuado y de un diseño apropiado, interesa también el desarrollo de un bracket de tipo autoligado por Ia facilidad de manejo que este tipo presenta. Además, gracias al diseño especial del bracket, objeto de esta invención, se facilita el intercambio de tapas-clip, con Io que entre otras prestaciones, se puede variar su acción entre activa y pasiva. Entre los materiales ideales de plástico para un bracket y que subsane las deficiencias actuales se encuentran Ia polisulfona, Ia poliétersulfona (psu), el policarbonato y Ia polietereterquetona (peek). Estos materiales son resistentes a Ia hidrólisis y además mantienen su transparencia a Io largo del tiempo.Once these problems have been resolved, through the choice of a suitable plastic material and an appropriate design, the development of a self-ligating type bracket is also interesting due to the ease of handling that this type presents. In addition, thanks to the special design of the bracket, object of this invention, the exchange of covers-clip is facilitated, with which, among other benefits, its action can be varied between active and passive. Among the ideal plastic materials for a bracket and to remedy the current deficiencies are polysulfone, polyether sulfone (psu), polycarbonate and polyether ether (peek). These materials are resistant to hydrolysis and also maintain their transparency over time.
Estos tipos de plásticos son empleados en Ia fabricación de productos para fines sanitarios, por Io cual, esta probada su compatibilidad con Ia salud del paciente.These types of plastics are used in the manufacture of products for sanitary purposes, whereby their compatibility with the patient's health is proven.
En Ia realización preferente se usan estos materiales sin estar combinados con otros, para mantener así Ia uniformidad de propiedades físicas y químicas en toda Ia estructura del bracket. Respecto al cementado del bracket al diente y Ia retención mecánica correspondiente, se soluciona mediante un diseño de Ia base del bracket que consiste en varias ranuras horizontales, descrito en Ia patente de este mismo inventor; PLÁSTIC BRACKET WITH MECHANICAL RETENTIONIn the preferred embodiment, these materials are used without being combined with others, so as to maintain the uniformity of physical and chemical properties throughout the structure of the bracket. Regarding the cementation of the bracket to the tooth and the corresponding mechanical retention, it is solved by means of a design of the base of the bracket that consists of several horizontal grooves, described in the patent of this same inventor; PLASTIC BRACKET WITH MECHANICAL RETENTION
AND PRODUCTION METHOD THEREOF1 WO 2006/136618.AND PRODUCTION METHOD THEREOF 1 WO 2006/136618.
Finalmente, el bracket es del tipo autoligado y por su diseño, se facilita su uso al ortodoncista.Finally, the bracket is of the self-ligating type and by its design, its use is facilitated by the orthodontist.
Gracias a Ia posibilidad de cambiar las tapas-clip, que se realizan de diferentes tipos, se puede cambiar su acción a activa, que es Ia que tiene un mayor contacto entre arco de alambre y el bracket, obteniendo así, un tratamiento más eficiente en las fases finales del tratamiento ortodóncico. Sin embargo, Ia acción del bracket como pasiva es preferida por los ortodontistas para las fases iniciales de Ia corrección ortodoncica u otros casos particulares, siendo de esta manera, el bracket ideal, ya que prevé Ia versatilidad de ambas técnicas, Ia pasiva y Ia activa de acuerdo con Ia necesidad. Es por Io que resulta útil disponer de una gama de tapas-clips, de manera que el ortodoncista pueda elegir Ia tapa- clip más efectiva para cada caso. Estado actual de Ia técnica referente a los puntos de interés de Ia invención antes discutidos.Thanks to the possibility of changing the clip-covers, which are made of different types, its action can be changed to active, which is the one that has a greater contact between the wire arch and the bracket, thus obtaining a more efficient treatment in the final stages of orthodontic treatment. However, the action of the bracket as passive is preferred by the orthodontists for the initial phases of the orthodontic correction or other particular cases, thus being the ideal bracket, since it provides for the versatility of both techniques, the passive and the active according to the need. That is why it is useful to have a range of cover-clips, so that the orthodontist can choose the most effective cover-clip for each case. Current state of the art regarding the points of interest of the invention discussed above.
En Ia patente US 5.032.080 se presenta un bracket de polisulfona, pero este no tiene en Ia base un pivote de autocentrado, ni Ia tapa-clip tiene Ia cavidad de centrado que facilita el perfecto posicionamiento de las dos piezas del bracket, ni ofrece Ia posibilidad de alternar Ia acción del bracket de pasivo a activo.In US 5,032,080 a polysulfone bracket is presented, but it does not have a self-centering pivot at the base, nor does the clip-cap have the centering cavity that facilitates the perfect positioning of the two pieces of the bracket, nor does it offer The possibility of alternating the action of the bracket from passive to active.
La patente US 5.295.824 discute brackets de plástico, incluyendo polisulfona como una opción. Estos son de retención química ya que requieren de una capa para preparar el bracket para su adhesión al diente. Reivindica los adhesivos de Ia primera capa de retención. No tiene en Ia base pivote de autocentrado ni tapa-clip con cavidad de centrado.US 5,295,824 discusses plastic brackets, including polysulfone as an option. These are chemical retention because they require a layer to prepare the bracket for adhesion to the tooth. Claim the adhesives of the first retention layer. It has no self-centering pivot base or clip-cap with centering cavity.
La patente 5.738.513 presenta brackets de plástico autoligados. A diferencia del de Ia presente invención, en Ia que el bracket consta de dos partes, éste esta compuesto de tres partes, una de ellas se ajusta para establecer Ia posición del alambre de arco. La base no tiene pivote de autocentrado ni tapa-clip con cavidad de centrado para facilitar el perfecto posicionamiento de ésta.Patent 5,738,513 presents self-ligating plastic brackets. Unlike that of the present invention, in which the bracket consists of two parts, it is composed of three parts, one of which is adjusted to establish the position of the arc wire. The base does not have a self-centering pivot or a cover-clip with centering cavity to facilitate its perfect positioning.
En relación al estado actual de Ia técnica, el bracket de Ia presente invención representa una mejoría por su versatilidad. El bracket es de material termoplástico microinyectable en su totalidad, en base a polisulfona o polietereterquetona, peek, y se compone de dos piezas; una base y una tapa-clip intercambiable.In relation to the current state of the art, the bracket of the present invention represents an improvement due to its versatility. The bracket is made of microinjectable thermoplastic material in its entirety, based on polysulfone or polyether ether, peek, and consists of two pieces; a base and an interchangeable cover-clip.
La base se caracteriza por tener un pivote de autocentrado que tiene unos salientes en cada pared de las dos que componen el surco. Dichos salientes son parte del clip de cierre y engancharan con los salientes de Ia tapa-clip, Ia otra parte del clip, constituyendo un cierre rápido y seguro. Todos estos detalles se indicaran en los dibujos que se acompañan en el presente documento . Las dos paredes que componen el pivote de autocentrado de Ia base, además, tienen Ia función asegurar más fuertemente el cierre del surco con tapa-clip, así, si por cualquier circunstancia el arco de alambre trata de salir del surco, presionaría sobre Ia parte interior de las paredes de Ia base del surco, y por tanto se aseguraría aún más el cierre del surco, al presionar sobre Ia parte interna Ia cavidad de centrado de Ia tapa-clip. La tapa-clip gracias a un pequeño rebaje que tiene en su cavidad de centrado, facilita su posicionamiento y por el diseño del pivote de autocentrado de Ia base, hace que no pueda darse una posición errónea, de colocación, de Ia tapa-clip.The base is characterized by having a self-centering pivot that has projections on each wall of the two that make up the groove. Said projections are part of the closing clip and will engage with the projections of the clip-cover, the other part of the clip, constituting a quick and safe closure. All these details will be indicated in the accompanying drawings in this document. The two walls that make up the self-centering pivot of the base, in addition, have the function to more strongly secure the closure of the groove with clip-cover, thus, if under any circumstance the wire arch tries to leave the groove, it would press on the part inside the walls of the base of the groove, and therefore the closure of the groove would be further secured, by pressing the centering cavity of the cover-clip on the inner part. The cover-clip thanks to a small recess that has in its centering cavity, facilitates its positioning and by the design of the self-centering pivot of the base, it makes it possible to give an erroneous position, of placement, of the cover-clip.
También ofrece Ia ventaja de poder cambiar en cualquier momento Ia acción del bracket de pasiva a activa y viceversa, de acuerdo con Ia necesidad, o para mantener una eficiencia del tratamiento que pudiera verse afectada negativamente por una tapa-clip desgastada o estropeada. La tapa-clip además es más fácil de aplicar que en otros cierres de clip, ya que se consigue por simple deslizamiento, mediante una ligera presión sobre el pivote de autocentrado de Ia base, realizándose el cierre clip que constituye el autoligado.It also offers the advantage of being able to change at any time the action of the passive bracket to active and vice versa, according to the need, or to maintain an efficiency of the treatment that could be negatively affected by a worn or damaged cap-clip. The clip-cover is also easier to apply than in other clip closures, since it is achieved by simple sliding, by a slight pressure on the self-centering pivot of the base, the clip closure constituting the self-ligating being made.
DESCRIPCIÓN BÁSICA DE LA INVENCIÓNBASIC DESCRIPTION OF THE INVENTION
La presente invención propone un bracket de plástico autoligado con tapas- clip variables, compuesto de dos piezas:The present invention proposes a self-ligating plastic bracket with variable clip-covers, composed of two pieces:
-una base que posee un pivote de autocentrado, que esta constituido en un lado por dos paredes que poseen un saliente que forma parte del clip, y en el lado opuesto, de esta base, está Ia superficie que se adhiere al diente mediante retención mecánica. -Y una tapa-clip que es intercambiable, con Io que se da versatilidad al bracket al poder alternar entre Ia acción activa y pasiva de acuerdo a Ia etapa del tratamiento en que se encuentre un paciente u otros factores. Esta tapa-clip se ha diseñado con una cavidad de centrado para facilitar su perfecto posicionamiento con Ia base y formando así Ia perfecta unión de ambas piezas que conforman el bracket.-a base that has a self-centering pivot, which is constituted on one side by two walls that have a projection that is part of the clip, and on the opposite side, of this base, is the surface that adheres to the tooth by mechanical retention . -And a cover-clip that is interchangeable, with which the bracket is given versatility by being able to alternate between the active and passive action according to the stage of the treatment in which a patient or other factors are found. This cover-clip has been designed with a centering cavity to facilitate its perfect positioning with the base and thus forming the perfect union of both pieces that make up the bracket.
Con estas especificaciones se obtiene así un bracket autoligado, que puede ser realizado, entre otros, en material transparente de polisulfona con igual efectividad a un bracket autoligado metálico o cerámico, con una superioridad estética, respecto a éstos y con Ia posibilidad además de cambiar entre acción activa y pasiva del bracket. Con los objetivos antes mencionados presentes, y con Ia asistencia de software de simulación basado en modelación de estructuras y sus comportamientos a través del método de elementos finitos, se procede a diseñar primeramente Ia base del bracket, objeto de Ia patente WO2006/136618, antes mencionada. Al tener Ia base el pivote de auto centrado y parte del mecanismo clip, se ha tenido que calcular y ensayar los espesores de dicho pivote y el de las paredes de Ia parte clip para evitar posibles roturas, así como Ia resistencia del amarre clip de Ia base con Ia tapa-clip, que evite que el arco de alambre se salga.With these specifications, a self-ligating bracket is obtained, which can be made, among others, in transparent polysulfone material with equal effectiveness to a self-ligating metallic or ceramic bracket, with an aesthetic superiority, with respect to these and with the possibility in addition to switching between active and passive bracket action. With the aforementioned objectives present, and with the assistance of simulation software based on modeling of structures and their behaviors through the finite element method, the base of the bracket, object of the WO2006 / 136618 patent, is first designed mentioned. Having the base of the self-centering pivot and part of the clip mechanism, it has had to calculate and test the thicknesses of said pivot and that of the walls of the clip part to avoid possible breakage, as well as the strength of the clip clip of the base with the cover-clip, which prevents the wire arc from coming out.
Otro paso importante para asegurar Ia calidad de Ia pieza es Ia simulación del moldeo por inyección de Ia misma. Los objetivos respecto al moldeo por inyección de Ia base son;Another important step to ensure the quality of the piece is the simulation of the injection molding thereof. The objectives regarding injection molding of the base are;
- que Ia pieza tenga un acabado uniforme y no se produzca Ia hidrólisis o al menos sea mínima; y- that the piece has a uniform finish and hydrolysis does not occur or at least is minimal; Y
- que en el proceso de inyección no se acumulen tensiones por una difícil evacuación de los gases, Io que produciría una contracción no uniforme y una forma final no acorde a las características esperadas que han sido calculadas en los pasos anteriores.- that tensions do not accumulate in the injection process due to a difficult evacuation of the gases, which would produce a non-uniform contraction and a final shape not according to the expected characteristics that have been calculated in the previous steps.
Mediante un software de simulación se han realizado pruebas para ver cuál es el punto óptimo de inyección y en dónde deben estar situadas las chimeneas o puntos de escape de los gases para que, una vez sacada del molde, la pieza tenga las características requeridas de uniformidad de material, uniformidad de contracción y acabado superficial.Through simulation software, tests have been carried out to see which is the optimum injection point and where the chimneys or exhaust points of the gases should be located so that, once removed from the mold, the piece has the required characteristics of material uniformity, shrinkage uniformity and surface finish.
Si Ia pieza no resulta conveniente para moldeo por inyección ésta se modifica y se empieza otra iteración del proceso descrito, hasta obtener una base que satisfaga los requisitos funcionales y que se preste a moldeo por microinyección sin inconvenientes.If the part is not suitable for injection molding, it is modified and another iteration of the described process is started, until a base is obtained that satisfies the functional requirements and that lends itself to microinjection molding without inconvenience.
Para una descripción detallada del proceso descrito se refiere a Ia publicación de aplicación de patente WO2006136618, antes referenciada.For a detailed description of the process described, it refers to the patent application publication WO2006136618, referenced above.
Ya definida Ia forma geométrica de Ia base se diseñan una variedad de tapas-clips que Ia complementen, el entrelace de éstas con Ia base del bracket sirven para un doble propósito; asegurar el arco de alambre y controlar el tipo de acción, sea esta activa o pasiva.Once the geometric shape of the base has been defined, a variety of cover-clips are designed that complement it, the interlocking of these with the base of the bracket serves a double purpose; secure the wire arch and control the type of action, whether active or passive.
Durante las pruebas de desarrollo de Ia tapa-clip algunas de éstas se mostraron susceptibles a roturas, por Io que se estudiaron las dimensiones críticas para que su funcionamiento sea correcto, no sobrepasando el límite elástico del material, por Io cual se experimentó variando el espesor de las mismas, y se concluyó que un espesor entre 0.2 y 0.9 mm resulta una tapa- clip suficientemente resistente para su función. La adición de esta tapa-clip a Ia técnica del bracket representa una mejoría respecto al estado actual de Ia técnica por Ia facilidad de disponer de diferentes tapas-clips, todas ellas, con una cavidad de centrado de Ia forma adecuada para su perfecto guiado.During the development tests of the cover-clip some of these were susceptible to breakage, so that the critical dimensions were studied so that its operation is correct, not exceeding the elastic limit of the material, for which it was experienced varying the thickness of them, and it was concluded that a thickness between 0.2 and 0.9 mm is a cover-clip sufficiently resistant for its function. The addition of this cover-clip to the bracket technique represents an improvement with respect to the current state of the technique due to the ease of having different cover-clips, all of them, with a centering cavity of the suitable form for its perfect guidance.
Se ha diseñado con un rebaje en Ia parte central de las paredes del clip de Ia tapa-clip, que ajusta a Ia perfección con el pivote de autocentrado de Ia base, de tal manera que no puede existir error en Ia colocación de Ia tapa- clip en Ia base.It has been designed with a recess in the central part of the walls of the clip of the lid-clip, which fits perfectly with the self-centering pivot of the base, such that there can be no error in the placement of the lid. clip in the base.
La posibilidad de variar Ia forma y tamaño de Ia tapa clip, es un gran avance, ya que permite variar Ia estética y Ia acción del bracket, con Io cual el ortodoncista elige Ia más adecuada de acuerdo al tipo de tratamiento deseado. El pivote de autocentrado de Ia base, por su configuración, una vez que se coloca Ia tapa-clip, Ia bloquea lateralmente evitando su deslizamiento, gracias a que las paredes que componen el pivote de autocentrado, se introducen en Ia cavidad de centrado de Ia tapa-clip. Otra función del pivote de autocentrado de Ia base, es impedir que Ia ranura que forman ambas paredes y que constituyen el surco, se abra cuando el arco de alambre trate de salir, pues ejercerá una fuerza el arco de alambre sobre las partes internas de las paredes que forman el surco haciendo más fuerte el cierre, al presionar las paredes del pivote de autocentrado sobre las paredes de Ia tapa-clip.The possibility of varying the shape and size of the clip cover is a great advance, since it allows varying the aesthetics and the action of the bracket, with which the orthodontist chooses the most appropriate one according to the type of treatment desired. The self-centering pivot of the base, due to its configuration, once the cover-clip is placed, Ia locks laterally preventing its sliding, thanks to the walls that make up the self-centering pivot, are introduced into the centering cavity of the Ia clip-cover Another function of the self-centering pivot of the base is to prevent the groove formed by both walls and that constitute the groove from opening when the wire arc tries to exit, since the wire arc will exert a force on the internal parts of the walls that form the groove making the closure stronger, by pressing the walls of the self-centering pivot on the walls of the cover-clip.
Gracias al sistema de fabricación se pueden diseñar moldes de tapas-clip con ganchos o hooks, para fijar ligaduras elásticas u otros elementos auxiliares de ortodoncia. El problema que resuelve Ia presente invención es el de dotar de un bracket de plástico autoligado al que se Ie pueden cambiar y poner diferentes tapas-clip, que varíen Ia acción del bracket, pasando de pasivo a activo o viceversa. Que Ia posición de Ia tapa-clip, que constituye el cierre del surco donde se aloja el arco de alambre, sea totalmente guiado, gracias a Ia cavidad de centrado y los pequeños rebajes que posee dicha tapa-clip, que por deslizamiento de Ia tapa-clip sobre el pivote de auto centrado de Ia base, se realiza el cierre clip del bracket, y que por confeccionarse el pivote de autocentrado mediante dos paredes diseñadas de tal forma, que si por cualquier circunstancia el arco de alambre quiere salirse presionará sobre las caras internas de ambas paredes y éstas tenderán a abrirse y por tanto, a hacer un cierre más fuerte.Thanks to the manufacturing system, clip-cap molds with hooks or hooks can be designed to fix elastic ligatures or other auxiliary orthodontic elements. The problem solved by the present invention is that of providing a self-ligating plastic bracket to which different caps-clips can be changed and that vary the action of the bracket, going from passive to active or vice versa. That the position of the cover-clip, which constitutes the closure of the groove where the wire arch is housed, is fully guided, thanks to the centering cavity and the small recesses that said cover-clip possesses, which by sliding the cover -clip on the self-centering pivot of the base, the clip clip of the bracket is made, and that by making the self-centering pivot by means of two walls designed in such a way, that if under any circumstance the wire arch wants to exit, it will press on the internal faces of both walls and these will tend to open and therefore to make a stronger closure.
DESCRIPCIÓN DE LOS DIBUJOSDESCRIPTION OF THE DRAWINGS
Para una mejor comprensión del objeto de Ia presente invención se describe a continuación una realización práctica de Ia presente invención sobre Ia base de las figuras adjuntas, en donde: En Ia figura 1 se ha representado una perspectiva del bracket de autoligado con tapas-clip variables, objeto de Ia presente invención, donde se indica con el número (1) Ia base, con el número (2) Ia tapa-clip y con el número (3) se aprecia Ia sección del arco de alambre. En Ia figura 2 se ha representado una sección del bracket de autoligado con tapas-clip variables, con Ia misma numeración que en Ia figura anterior, se aprecia con el número (1) Ia sección de Ia base, con el (2) Ia sección de Ia tapa-clip y con el (3) Ia sección del arco de alambre, que se aloja en el surco (13) de Ia base (1) y que es cerrado mediante Ia tapa-clip (2), por el clip formado por los enganches (14) de Ia base (1) y (24) de Ia tapa-clip (2), formados estos enganches, (14) y (24), en las paredes (15) de Ia base (1) y de las paredes (25) de Ia tapa-clip (2).For a better understanding of the object of the present invention, a practical embodiment of the present invention is described below on the basis of the attached figures, wherein: Figure 1 shows a perspective of the self-ligating bracket with variable clip-covers, object of the present invention, where it is indicated with the number (1) the base, with the number (2) the cover-clip and with the number (3) the section of the wire arch is appreciated. Figure 2 shows a section of the self-ligating bracket with variable clip-covers, with the same numbering as in the previous figure, the section of the base can be seen with the number (1), with the (2) the section of the cover-clip and with (3) the section of the wire arch, which is housed in the groove (13) of the base (1) and which is closed by means of the cover-clip (2), by the clip formed by the hooks (14) of the base (1) and (24) of the cover-clip (2), these hooks formed (14) and (24), in the walls (15) of the base (1) and of the walls (25) of the cover-clip (2).
Se aprecian en esta figura 2, las ranuras (12) de Ia base (1) por donde se adhieren al diente por Ia superficie exterior de éstas, mediante retención mecánicaIn this figure 2, the grooves (12) of the base (1) through which they adhere to the tooth by the outer surface of these, by mechanical retention are appreciated
Con el número (21) se han señalado las aletas de Ia tapa-clip (2). La figura 3 es una sección de Ia base, donde se puede apreciar el pivote de autocentrado (16), que sobresale de las paredes (15) que forman el surco (13). También se observa el enganche (14) de Ia base (1) y las ranuras (12). La figura 4 representa una perspectiva de Ia base, donde se aprecian bien las paredes (15) de Ia base (1) y el pivote (16) de autocentrado, se distingue también el surco (13), donde se alojará el arco de alambre (3), aquí no representado. La figura 5 representa una perspectiva de Ia tapa-clip donde se distingue Ia cavidad de centrado (28) de Ia tapa-clip, que como deberá coincidir con el pivote de autocentrado de Ia base, forma unos pequeños rebajes (27) en las paredes (25) de Ia tapa-clip para que no haya nunca lugar a posibles errores de colocación de Ia tapa-clip en Ia base del bracket, esto se observa mejor en Ia figura 7. Por estos rebajes (27) se ajustará Ia cavidad de centrado (28) de Ia tapa-clip, guiándola, para que se introduzca el pivote de autocentrado de Ia base, cerrando el surco. La figura 6, es una vista inferior de una perspectiva de Ia tapa-clip, en Ia que se distinguen los rebajes (27) de Ia cavidad de centrado (28) de Ia tapa-clip, en las paredes de Ia tapa-clip. Se ha señalado igualmente las aletas (21), en esta figura 6 y los enganches (24) de Ia tapa-clip. La figura 7 representa una tapa-clip, que hace que Ia acción del bracket sea activa, gracias al resalte (25) se eliminan los grados de libertad del arco de alambre, impidiendo cualquier movimiento relativo del arco de alambre con respecto al bracket, por Io que será el bracket quien absorba las tensiones, acomodándose y por Io tanto su acción será activa. En Ia figura 8, se ha representado una tapa-clip que hace que Ia acción del bracket sea pasiva, ya que todas las tensiones las absorberá el arco de alambre, pues al ser lisa Ia tapa-clip en Ia parte de cierre del surco, puede moverse libremente el arco de alambre dentro del surco. Ese movimiento del arco de alambre es el que absorbe las posibles tensiones y por tanto Ia acción del bracket será pasiva.With the number (21) the fins of the cover-clip (2) have been indicated. Figure 3 is a section of the base, where you can see the centering pivot (16), which protrudes from the walls (15) that form the groove (13). The coupling (14) of the base (1) and the grooves (12) are also observed. Figure 4 represents a perspective of the base, where the walls (15) of the base (1) and the self-centering pivot (16) are well appreciated, the groove (13) is also distinguished, where the wire arc will be housed (3), not represented here. Figure 5 represents a perspective of the cover-clip where the centering cavity (28) of the cover-clip is distinguished, which, as it should coincide with the self-centering pivot of the base, forms small recesses (27) in the walls (25) of the cover-clip so that there is never room for possible errors of placing the cover-clip in the base of the bracket, this is best seen in Figure 7. By these recesses (27) the cavity of centering (28) of the cover-clip, guiding it, so that the self-centering pivot of the base is introduced, closing the groove. Figure 6 is a bottom view of a perspective of the cover-clip, in which the recesses (27) of the centering cavity (28) of the cover-clip are distinguished, in the walls of the cover-clip. It has also indicated the fins (21), in this figure 6 and the hooks (24) of the clip-cover. Figure 7 represents a cover-clip, which makes the action of the bracket active, thanks to the protrusion (25) the degrees of freedom of the wire arch are eliminated, preventing any relative movement of the wire arch with respect to the bracket, by What will be the bracket who absorbs the tensions, accommodating and therefore its action will be active. In Figure 8, a clip-clip has been represented that makes the action of the bracket passive, since all the tensions will be absorbed by the wire arc, since the clip-clip in the closing part of the groove is smooth, the wire arch can move freely inside the groove. This movement of the wire arch is the one that absorbs the possible tensions and therefore the action of the bracket will be passive.
En esta misma figura 8, con el número 29 se ha representado un gancho o hook para Ia fijación de ligaduras elásticas u otros elementos auxiliares de ortodoncia.In this same figure 8, with the number 29 a hook or hook has been represented for fixing elastic ligatures or other auxiliary orthodontic elements.
La figura 9 muestra una perspectiva de una tapa-clip, en Ia que se aprecia el punto o puerta de inyección (211) del material termoplástico.Figure 9 shows a perspective of a cover-clip, in which the injection point (211) of the thermoplastic material is appreciated.
Gracias a esta situación estratégica de Ia puerta de entrada del material, consecuencia de una serie de cálculos, se logra, sin aumentar el espesor de las paredes de Ia tapa-clip, aumentar Ia resistencia a Ia rotura en las zonas más débiles, al conseguir una estructura laminar, obtenida mediante un flujo laminar del material termoplástico rápido y uniforme, y como consecuencia un aumento de Ia tenacidad del material y por Io tanto de su resistencia a Ia rotura. Con Ia posición de Ia única puerta de entrada del material termoplástico o punto de inyección indicada en Ia figura 9, se consigue llenar el molde de un extremo al contrario de Ia tapa-clip, consiguiéndose una orientación de las fibras del material en el sentido deseado y resultando finalmente una estructura laminar del material. Para conseguir un llenado rápido del molde, que el régimen sea laminar y que no aparezcan tensiones en Ia tapa-clip indeseadas, aparte de Io anterior, hay que evacuar, a medida en que se va llenando el molde, el aire que contiene, mediante una situación estratégica de las chimeneas o puntos de expulsión de gases.Thanks to this strategic situation of the entrance door of the material, consequence of a series of calculations, it is achieved, without increasing the thickness of the walls of the cover-clip, to increase the resistance to breakage in the weakest areas, by achieving a laminar structure, obtained by means of a laminar flow of the fast and uniform thermoplastic material, and as a consequence an increase in the toughness of the material and therefore of its resistance to breakage. With the position of the only entrance door of the thermoplastic material or injection point indicated in Figure 9, it is possible to fill the mold at one end opposite the clip-clip, achieving an orientation of the fibers of the material in the desired direction and finally resulting in a sheet structure of the material. To achieve a rapid filling of the mold, that the regime is laminar and that no tensions appear in the unwanted cover-clip, apart from the previous one, it is necessary to evacuate, as the mold is filled, the air it contains, by a strategic situation of chimneys or gas ejection points.
DESCRIPCIÓN DE LA REALIZACIÓN PREFERENTE DE LADESCRIPTION OF THE PREFERRED EMBODIMENT OF THE
INVENCIÓN.INVENTION.
La presente invención propone un bracket de plástico autoligado con tapas- clip variables fabricado por microinyección, compuesto por dos piezas: una base y una tapa-clip. Ambas piezas son de material termoplástico en base a polisulfona o polietereterquetona (peek), en su totalidad.The present invention proposes a self-ligating plastic bracket with variable clip-covers manufactured by microinjection, consisting of two parts: a base and a clip-cover. Both pieces are made of thermoplastic material based on polysulfone or polyetheretherketone (peek), in its entirety.
Las variables que se han considerado para conseguir el bracket de Ia presente invención son: material de fabricación, tamaño del bracket, diseño y su proceso de fabricación. Los materiales elegidos han sido termoplásticos que permitan el proceso de microinyección y que además cumplan con las necesidades estéticas y de resistencia mecánica, estabilidad química y resistencia al calor, así como su tolerancia biológica, ya comprobada en otros productos sanitarios. Por esta razón se ha hecho una realización preferente en termoplásticos con base en polisulfona o polietereterquetona (peek). El bracket de Ia presente invención está representado en las Figuras 1 , 2, 3 4, 5 y 6 y consta de dos elementos, Ia base (1) que se une al diente mecánicamente mediante las ranuras (12) y contiene, esta base (1) el surco (13) que Io forma las dos paredes (14), donde se aloja el arco de alambre (3). El pivote (16) de autocentrado de Ia base (1) guiará a Ia tapa-clip (2), que se introducirá en él y sin posibilidad de error gracias a Ia cavidad (26) de autoguiado de Ia tapa-clip (2) y los rebajes (27) en esa cavidad (26) de guiado de Ia tapa-clip (2). Los enganches (24) de las paredes (25) de Ia tapa-clip (2) formarán el cierre clip con los enganches (14) de las paredes (15) de Ia base (1), de esta manera cerrará Ia tapa-clip (2) el surco (13) que aloja al arco de alambre (3).The variables that have been considered to achieve the bracket of the present invention are: manufacturing material, bracket size, design and its manufacturing process. The materials chosen have been thermoplastics that allow the microinjection process and that also meet the aesthetic and mechanical resistance, chemical stability and heat resistance needs, as well as their biological tolerance, already proven in other medical devices. For this reason, a preferred embodiment has been made in thermoplastics based on polysulfone or polyether ether (peek). The bracket of the present invention is represented in Figures 1, 2, 3 4, 5 and 6 and consists of two elements, the base (1) that joins the tooth mechanically through the grooves (12) and contains, this base ( 1) the groove (13) that forms the two walls (14), where the wire arch (3) is housed. The self-centering pivot (16) of the base (1) will guide the cover-clip (2), which will be introduced therein and without the possibility of error thanks to the cavity (26) of autoguiding of the clip-cover (2) and the recesses (27) in that cavity (26) of guiding the clip-cover (2). The hooks (24) of the walls (25) of the clip-cover (2) will form the clip closure with the hooks (14) of the walls (15) of the base (1), thus closing the clip-cover (2) the groove (13) that houses the wire arch (3).
La operación de quitar una tapa-clip (2) es sencilla, al realizarse mediante una simple incisión en una de las paredes de Ia tapa-clip, Ia base seguirá adherida al diente. La colocación de una tapa-clip es por simple presión deslizándose sobre el pivote de autocentrado y cerrándose de Ia manera indicada anteriormente.The operation of removing a cover-clip (2) is simple, when performed by a simple incision in one of the walls of the cover-clip, the base will remain attached to the tooth. The placement of a cover-clip is by simple pressure sliding on the self-centering pivot and closing in the manner indicated above.
Se prevé en algunos diseños de Ia tapa-clip (2) unas aletas (21) para colocar ligaduras elásticas, cadenetas u otros dispositivos auxiliares de ortodoncia.Some fins (21) are provided in some designs of the cover-clip (2) to place elastic ligatures, chains or other auxiliary orthodontic devices.
En Ia realización preferente se ha utilizado termoplásticos en base a polisulfona o polietereterquetona (peek) y partiendo de sus propiedades físicas y químicas se han efectuado las pruebas necesarias para calcular las dimensiones adecuadas del bracket con el objetivo de que éste tenga una resistencia a Ia deformación y una resistencia a Ia rotura adecuada.In the preferred embodiment, thermoplastics have been used based on polysulfone or polyetheretherketone (peek) and based on their physical and chemical properties, the necessary tests have been carried out to calculate the appropriate dimensions of the bracket so that it has a resistance to deformation and a suitable resistance to breakage.
En el proceso de fabricación de Ia tapa-clip se ha seguido el mismo método que en el de Ia base, es decir, por microinyección e iteración del cálculo del proceso.In the manufacturing process of the cover-clip the same method has been followed as in that of the base, that is, by microinjection and iteration of the process calculation.
Por los problemas aparecidos en las primeras pruebas al tener las tapas-clip cierta tendencia a Ia rotura y realizar una microinyección, hubo que recalcular el proceso y resultó que si se conseguía una estructura laminar en el material , se lograba aumentar el límite elástico y por Io tanto, aumentar Ia resistencia a Ia rotura.Due to the problems that appeared in the first tests, when the clip covers had a certain tendency to break and perform a microinjection, the process had to be recalculated and it turned out that if a laminar structure was achieved in the material, the elastic limit was increased and by Therefore, increase the resistance to breakage.
Para ello hubo que cambiar Ia posición de Ia puerta de entrada de Ia microinyección, para obtener una estructura laminar del material y lograr Ia máxima resistencia en Ia zona crítica de Ia tapa-clip, evitando de este modo posibles fisuras o rotura de Ia misma. For this, the position of the microinjection entrance door had to be changed, to obtain a laminar structure of the material and achieve maximum resistance in the critical area of the clip-clip, thus avoiding possible cracks or breakage of the same.

Claims

REIVINDICACIONES
1,- Bracket de plástico autoligado con tapas-clip variables de uso en ortodoncia, caracterizado porque comprende:1, - Self-ligating plastic bracket with variable clip covers for use in orthodontics, characterized in that it comprises:
- Una base provista de un pivote de autocentrado, que se introduce en Ia cavidad de centrado de Ia tapa-clip y que está formado por dos paredes para constituir el surco. - Una tapa-clip con Ia que se cierra el surco de Ia base, donde se aloja el arco de alambre ortodóncico, configurada con una cavidad de centrado y provista de unos enganches que se amarraran con los enganches del pivote de autocentrado de Ia base y que constituyen el cierre clip, conseguido mediante el deslizamiento de Ia tapa-clip sobre el pivote de autocentrado de Ia base por presión y logrando el auto ligado.- A base provided with a self-centering pivot, which is introduced into the centering cavity of the cover-clip and which is formed by two walls to constitute the groove. - A cover-clip with which the groove of the base is closed, where the arc of orthodontic wire is housed, configured with a centering cavity and provided with hooks that will be moored with the hooks of the self-centering pivot of the base and which constitute the clip closure, achieved by sliding the clip-cover on the self-centering pivot of the base by pressure and achieving the self-linked.
2.- Bracket de plástico autoligado con tapas-clip variables de uso en ortodoncia, según Ia reivindicación 1 , caracterizado porque Ia tapa-clip tiene un saliente, en su parte interna, para variar las dimensiones útiles del surco donde se aloja el arco de alambre.2. Self-ligating plastic bracket with variable clip covers for use in orthodontics, according to claim 1, characterized in that the clip-cap has a projection, in its internal part, to vary the useful dimensions of the groove where the arc of wire.
3.- Bracket de plástico autoügado con tapas-clip variables de uso en ortodoncia, según reivindicación 1 , caracterizado porque Ia tapa-clip tiene un número de ganchos o hooks para sujeción de ligaduras elásticas comprendido entre 0 y 2.3. Self-plastic plastic bracket with variable clip covers for use in orthodontics, according to claim 1, characterized in that the clip-clip has a number of hooks or hooks for fastening elastic ties between 0 and 2.
4.- Bracket de plástico autoligado con tapas variables de uso en ortodoncia según reivindicación 1 , caracterizado porque se fabrica con cualquier material adecuado para el proceso de microinyección en base a termoplásticos, o termoplásticos con cargas de cerámica o de metal. 4. Self-ligating plastic bracket with variable covers for orthodontic use according to claim 1, characterized in that it is manufactured with any material suitable for the microinjection process based on thermoplastics, or thermoplastics with ceramic or metal loads.
5.- Bracket de plástico autoligado con tapas variables de uso en ortodoncia según reivindicación 1 , caracterizado porque el proceso de fabricación de Ia tapa-clip es por microinyección, con una única puerta de entrada del material, situada en el centro de Ia superficie superior de dicha tapa-clip, tal como se indica en Ia figura 9, consiguiendo una estructura laminar del material. 5. Self-ligating plastic bracket with variable covers for orthodontic use according to claim 1, characterized in that the manufacturing process of the clip-cover is by microinjection, with a single entrance door of the material, located in the center of the upper surface of said cover-clip, as indicated in Figure 9, obtaining a laminar structure of the material.
PCT/ES2008/000477 2008-07-04 2008-07-04 Self-ligating plastic braces with variable clip-on covers and manufacturing process WO2010000883A1 (en)

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PCT/ES2008/000477 WO2010000883A1 (en) 2008-07-04 2008-07-04 Self-ligating plastic braces with variable clip-on covers and manufacturing process

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PCT/ES2008/000477 WO2010000883A1 (en) 2008-07-04 2008-07-04 Self-ligating plastic braces with variable clip-on covers and manufacturing process

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012006173A1 (en) * 2012-03-28 2013-10-02 Tena Eichenberg Cap for an orthodontic bracket
WO2014059053A2 (en) * 2012-10-09 2014-04-17 Dentsply International Inc. Self-ligating orthodontic brackets
ES2556248A1 (en) * 2014-07-08 2016-01-14 José Luis Cerdeira Iglesias Dual fixed-removable orthodontics (Machine-translation by Google Translate, not legally binding)
US20210137647A1 (en) * 2018-01-16 2021-05-13 Dalia El-Bokle Dalman orthodontic bracket

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5154607A (en) * 1991-05-13 1992-10-13 Herbert Hanson Low friction orthodontic brackets
US20030049582A1 (en) * 2001-09-12 2003-03-13 Norbert Abels Self-ligating orthodontic brackets that provide spring action from ligation cover to arch wire for dynamic active ligation
EP1468657A2 (en) * 2003-04-18 2004-10-20 Dentsply-Sankin K.K. Orthodontic bracket and manufacturing method thereof
EP1900339A1 (en) * 2005-06-17 2008-03-19 Euroortodoncia, S.L. Plastic bracket with mechanical retention and production method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5154607A (en) * 1991-05-13 1992-10-13 Herbert Hanson Low friction orthodontic brackets
US20030049582A1 (en) * 2001-09-12 2003-03-13 Norbert Abels Self-ligating orthodontic brackets that provide spring action from ligation cover to arch wire for dynamic active ligation
EP1468657A2 (en) * 2003-04-18 2004-10-20 Dentsply-Sankin K.K. Orthodontic bracket and manufacturing method thereof
EP1900339A1 (en) * 2005-06-17 2008-03-19 Euroortodoncia, S.L. Plastic bracket with mechanical retention and production method thereof

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012006173A1 (en) * 2012-03-28 2013-10-02 Tena Eichenberg Cap for an orthodontic bracket
DE102012006173B4 (en) * 2012-03-28 2017-10-19 Tena Eichenberg Cap for an orthodontic bracket and device for tooth regulation
WO2014059053A2 (en) * 2012-10-09 2014-04-17 Dentsply International Inc. Self-ligating orthodontic brackets
WO2014059053A3 (en) * 2012-10-09 2014-09-25 Dentsply International Inc. Self-ligating orthodontic brackets
CN105407832A (en) * 2012-10-09 2016-03-16 登士柏国际公司 Self-ligating orthodontic brackets
US9480541B2 (en) 2012-10-09 2016-11-01 Dentsply International Inc. Self-ligating orthodontic brackets
ES2556248A1 (en) * 2014-07-08 2016-01-14 José Luis Cerdeira Iglesias Dual fixed-removable orthodontics (Machine-translation by Google Translate, not legally binding)
US20210137647A1 (en) * 2018-01-16 2021-05-13 Dalia El-Bokle Dalman orthodontic bracket
US11744680B2 (en) * 2018-01-16 2023-09-05 Dalia El-Bokle Dalman orthodontic bracket

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