EP2892461A1 - Ébauche et procédé de production d'une restauration dentaire par usinage par enlèvement de matière - Google Patents

Ébauche et procédé de production d'une restauration dentaire par usinage par enlèvement de matière

Info

Publication number
EP2892461A1
EP2892461A1 EP13759700.1A EP13759700A EP2892461A1 EP 2892461 A1 EP2892461 A1 EP 2892461A1 EP 13759700 A EP13759700 A EP 13759700A EP 2892461 A1 EP2892461 A1 EP 2892461A1
Authority
EP
European Patent Office
Prior art keywords
blank
framework
screw
dental restoration
closure
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP13759700.1A
Other languages
German (de)
English (en)
Inventor
Josef Schweiger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SCHWEIGER, JOSEF
Original Assignee
Ludwig Maximilians Universitaet Muenchen LMU
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 Ludwig Maximilians Universitaet Muenchen LMU filed Critical Ludwig Maximilians Universitaet Muenchen LMU
Publication of EP2892461A1 publication Critical patent/EP2892461A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/0003—Making bridge-work, inlays, implants or the like
    • A61C13/0022—Blanks or green, unfinished dental restoration parts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/0003—Making bridge-work, inlays, implants or the like
    • A61C13/0006—Production methods
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/08—Artificial teeth; Making same
    • A61C13/083—Porcelain or ceramic teeth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/08—Artificial teeth; Making same
    • A61C13/083—Porcelain or ceramic teeth
    • A61C13/0835—Ceramic coating on metallic body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A61C8/0074—Connecting devices for joining an upper structure with an implant member, e.g. spacers with external threads
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/15—Compositions characterised by their physical properties
    • A61K6/16—Refractive index
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/30—Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
    • A61K6/802—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B33/00—Features common to bolt and nut
    • F16B33/004—Sealing; Insulation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24612—Composite web or sheet

Definitions

  • the present invention is in the field of dental technology.
  • it relates to a blank and a system for producing a dental restoration by subtractive processing, a method for producing a blank and a method for producing a dental restoration by subtractive processing.
  • Examples of blank blocks that can be subtractive processed for the production of dental restorations are known from the patent applications EP 000001506745 AI, WO002005016171 AI and US 020110065065 AI.
  • dental restorations have high strength and natural appearance. High strength reduces the risk of breakage and reduces micro-movements, which can affect the longevity of the dental restoration.
  • Hard materials, such as lithium disilicate, for use as dental ceramics have the general disadvantage that they are difficult to process subtractive. The subtractive processing of these materials is time-consuming and less material-friendly. The wear of the machining tools is comparatively high.
  • the blank according to the invention comprises a frame part and a block part.
  • the block part is non-positively connected to the outside of the frame part.
  • the block part comprises or is in one embodiment of lithium metasilicate, which is very suitable for subtractive processing because of its relatively low strength.
  • the desired shape of the dental restoration for example the shape of a posterior tooth
  • the subtractive processing can be carried out in a known manner, for example with computer-controlled CAD / CAM methods. Due to the non-positive connection, the cohesion between the frame part and the block part during a subtractive processing is not affected. This allows, for example, that the block part is held over the frame part during the subtractive processing.
  • the framework part comprises zirconia (Zr0 2 ) and / or titanium. These materials have a very high flexural strength and a very high modulus of elasticity, which gives the dental restoration a very high rigidity and stability. As a result, micro-movements of the dental restoration attached to the patient are reduced, so that the dental restoration based on the blank according to the invention is very durable and reliable. In addition, damage to the restoration, such as Verblendungsabplatzept avoided.
  • the framework part has an inner contour that substantially corresponds to an outer contour of an implant base.
  • the implant base may include a connector that may be connected to an implant that is hemmed in the patient's jawbone.
  • the implant base may also be a portion of an implant that is integrally connected to the implant anchored in the patient's jawbone. Since the inner contour of the frame part and the outer contour of the implant base substantially correspond to one another, the dental restoration can be fitted accurately on the implant base and connected flush with it.
  • the blank according to the invention offers the great advantage that, owing to the lithium metasilicate which is contained in the block part and which has a comparatively low strength, it can be processed very subtly in a first process step.
  • the lithium metasilicate can be converted by a thermal process in the firmer lithium disilicate. Due to the strength of lithium disilicate its direct subtractive processing would be much less material-friendly and would take longer. Furthermore, the abrasive wear would be extremely high, so that the whole process would be uneconomical or even impossible with small grinders.
  • lithium disilicate has the disadvantage that it has a high translucency, so that a dental restoration would have an unnatural appearance when using lithium disilicate alone. Due to the opaque framework part, this disadvantage does not apply to a dental restoration from the blank according to the invention, because the dental restoration is superficially translucent, namely to the more opaque framework part, and thus looks very similar to a natural tooth (dentin enamel structure of a natural tooth ). Both the color of the frame part and the color of the block part, the color of the dental restoration can be adapted to the color of a natural tooth.
  • the block part can also consist of a glass ceramic or a glass ceramic precursor.
  • a glass-ceramic is an inorganic, non-metallic material in which one or more crystalline phases are surrounded by a glass phase.
  • any material that can be converted to a glass-ceramic by heat treatment is considered, Such a glass-ceramic precursor is often porous, and the heat treatment of the porous precursor will typically have a sintering process characteristics, in particular compaction of the A further aspect of the heat treatment is a transition of the glass phase into a fine-grained crystalline structure, in which the glass-ceramic precursor is less firm and thus easier to process than the finished glass-ceramic.
  • glass-ceramic in some cases, it may in turn be termed glass-ceramic, but with a reduced strength compared to the state after the heat-treatment, d. H. in the finished dental restoration.
  • the blank according to the invention may also comprise a framework connection part.
  • the framework connector comprises zirconia (ZrO 2 ) and a port geometry. Using the connection geometry, the framework connection part - and thus the dental restoration - can be connected to an implant.
  • the framework connection part corresponds to a one-piece combination of framework part and implant base. Therefore, the framework connection part may comprise features which in the present description are described only with respect to the implant base and / or the framework part.
  • the block part is preferably sintered to the frame part with the aid of an available material, in particular a silicate ceramic material.
  • an available material in particular a silicate ceramic material.
  • the available material can continue to serve to adjust the color of the dental restoration, especially if the framework part comprises titanium.
  • the available material is selected in a suitable color, so that the resulting color of the dental restoration corresponds to that of a natural tooth.
  • the available material preferably has a transformation temperature, at which the block part enters into the mentioned connection in the case of sintering with the help of the available material with the framework part.
  • the transformation temperature is preferably ⁇ 850 ° C, and more preferably ⁇ 840 ° C, and / or preferably> 350 ° C, and more preferably> 400 ° C. Due to the abovementioned temperature ranges, the frame part can be frictionally connected to the block part by means of a sintered connection, without the lithium metasilicate, for example, already being completely converted to lithium disilicate, so that the blank remains easy to machine in a subtractive manner.
  • the block part is adhesively bonded to the frame part by means of a hybrid material.
  • the hybrid material comprises an organic adhesive material and a sintered material.
  • the organic adhesive material allows at relatively low temperatures a frictional connection of the frame part and the block part, so that the cohesion of the block part and the frame part is ensured in the subtractive processing by the adhesive material.
  • the sintered material is suitable for combining the block part with the framework part at temperatures of ⁇ 850 ° C. As a result, the adhesive bond can be converted into a sintered compound after subtractive processing by thermal treatment.
  • the framework part preferably has a lateral wall thickness di of ⁇ 2.5 mm and particularly preferably of ⁇ 2 mm and / or a lateral wall thickness di of> 0.3 mm, particularly preferably of> 0.5 mm.
  • the outer diameter of the frame part is preferably ⁇ 7 mm and more preferably ⁇ 6 mm and / or preferably> 2 mm, and more preferably> 3 mm. It has been shown that within these ranges the strength has very good values and the tooth color and the superficial translucency can be adjusted as desired.
  • the wall thickness in the occlusal direction is preferably chosen to be somewhat thicker than in the lateral direction.
  • the occlusal wall thickness d 0 of the framework part is preferably ⁇ 3 mm, particularly preferably ⁇ 2.5 mm and in particular ⁇ 2 mm and / or preferably> 0.3 mm, particularly preferably> 0.5 mm and in particular> 0.7 mm.
  • the occlusal wall thickness d 0 can also vary with the location of the dental restoration: For anterior teeth, it is preferably> 0.3 mm and for posterior teeth preferably> 0.5 mm.
  • the inner contour of the frame part is not rotationally symmetrical to the occlusal axis AQ of the blank.
  • the inner contour of the frame part has at least one indentation.
  • the indentation has the advantage that, when the dental restoration is bonded to the implant base, adhesive material can penetrate into the indentation. This increases the strength of the adhesive bond and in particular reduces the risk of detachment of the dental restoration in the occlusal direction.
  • the indentation can be designed partially, it can also be configured circularly on the inner contour of the frame part.
  • the blank according to the invention comprises a channel for receiving a screw plug.
  • the channel allows the dental restoration to be screwed to the implant using an implant screw. After the implant screw has been pulled through the channel with a tool, the channel can be closed with the screw plug.
  • the closure screw can also be used for fastening the dental restoration on the implant base (abutment or part of the implant).
  • the invention comprises a system for producing a dental restoration.
  • the system comprises a blank according to the invention with channel, a closure screw and an implant base.
  • the implant base has an outer contour which substantially corresponds to the said inner contour of the framework part of the blank according to the invention, so that the blank can be applied to the implant base with a precise fit. Furthermore, the implant base includes a screw channel for receiving the screw plug into which the screw plug can be screwed to close the channel.
  • the closure screw comprises a threaded portion and a closure portion.
  • the threaded portion can be screwed into the screw channel of the implant base and the closure portion can close the said channel in the blank according to the invention in the screwed state.
  • the closure section has no threads and / or the cross-sectional diameter of the closure section is greater than the cross-sectional diameter of the threaded section.
  • the closure section has threads and / or the cross-sectional diameter of the closure section essentially corresponds to the cross-sectional diameter of the threaded section.
  • the invention comprises a method for producing a blank according to one of the previously described embodiments.
  • the method comprises sintering a block part onto a framework part, wherein the block part comprises lithium metasilicate or a glass ceramic precursor.
  • the sintering is carried out using a temperature profile in which lithium metasilicate is at least not completely converted to lithium disilicate or in which the glass ceramic precursor is not yet a glass ceramic, or at least not to a glass ceramic with the final strength, as they is sought in the finished dental restoration, is converted.
  • a blank can be produced which can be processed very well subtractive due to the lithium metasilicate or the glass ceramic precursor.
  • the dental restoration After conversion of the lithium metasilicate to the stronger lithium disilicate, which is frictionally engaged with the flexurally stable Scaffolding is sintered, or after conversion of the glass ceramic precursor to the glass ceramic for the finished dental restoration, the dental restoration has a high strength and stability. Due to the opaque framework part and / or the available material, the dental restoration, despite the translucent lithium disilicate or the glass ceramic has a natural, namely superficially translucent and in the depth opaque appearance (imitation of the enamel-dentin structure of the natural tooth).
  • the sintering is carried out using a disposable material, in particular a silicate ceramic material, e.g. IPS e.max CAD Crystall./Connect (Ivoclar).
  • a disposable material in particular a silicate ceramic material, e.g. IPS e.max CAD Crystall./Connect (Ivoclar).
  • the sintering is carried out at a first temperature which is preferably> 300 ° C, more preferably> 400 ° C, and / or is preferably ⁇ 850 ° C, more preferably ⁇ 840 ° C.
  • the duration of the sintering is preferably> 10 min, particularly preferably> 20 min and in particular> 30 min and / or preferably ⁇ 120 min, particularly preferably ⁇ 90 min and in particular ⁇ 40 min. Due to the use of these temperatures and times, the lithium metasilicate is not completely converted to lithium disilicate and the block portion is non-positively connected to the framework.
  • the block part is glued to the frame part by means of a hybrid material.
  • the hybrid material comprises an organic adhesive material and a sintered material which is suitable for combining the block part with the framework part at a temperature of ⁇ 850 ° C.
  • the method according to the invention further comprises a subtractive processing of the block part, which consists at least partly of lithium metasilicate or of a glass ceramic precursor, and a heating of the subtractive processed blank.
  • the lithium metasilicate of the processed block part is at least partially converted to lithium disilicate or the glass ceramic precursor is converted into a glass ceramic whose strength exceeds the strength of the glass ceramic precursor.
  • the method according to the invention preferably further comprises a step of heating.
  • the block part is sintered with the framework part by means of said sintering material of the hybrid material.
  • This heating step can be done together or separately be carried out with said heating for the at least partial conversion of lithium metasilicate to lithium disilicate or for at least partial conversion of the glass ceramic precursor to the finished glass ceramic.
  • the adhesive bond is replaced by a sintered compound or added to these.
  • said adhesion is not lost even temporarily.
  • the heating is carried out at a second temperature which is preferably> 800 ° C., particularly preferably> 820 ° C. and in particular> 830 ° C. and / or which is preferably ⁇ 950 ° C. more preferably ⁇ 900 ° C and especially ⁇ 850 ° C.
  • the duration of this heating is preferably> 10 min, particularly preferably> 20 min and in particular> 30 min and / or preferably ⁇ 120 min, particularly preferably ⁇ 90 min and in particular ⁇ 40 min.
  • the temperatures can be adjusted accordingly to convert the glass-ceramic precursor into a glass-ceramic with the desired strength.
  • the blank is preferably held over the frame part.
  • the blank for subtractive machining by means of an adhesive connection and / or a screw connection with the locking screw on the frame part with a machine connection part can be connected.
  • the blank for subtractive processing can also be connected to the implant base and clamped in the machine via this. Since the implant base is preferably metallic, for example titanium, the connection to the implant base must be achieved before the conversion of lithium metasilicate to lithium disilicate or from the glass ceramic precursor to the finished glass ceramic.
  • the subtractive processing of the block part also comprises a subtractive machining of the closure screw.
  • the blank according to the invention is screwed, for example with the screw plug on a holding device.
  • the block part of the blank can be subtly processed.
  • the closure part of the closure screw is sub- tractively processed and adapted to the contour of the dental restoration.
  • the outer contour of the screw plug can still be provided with a geometry, such as a slot or a cross, which allows to screw the threaded portion with a tool in the screw channel of the implant base.
  • the framework part is connected to the implant base, in particular by gluing and / or screwing by means of the closure screw.
  • the frame part can also be connected to the implant base, in particular with a ceramic implant base, for example, Zr0 2 by Vereedem.
  • the implant base is an implant adhesive base or an implant sinter base, respectively.
  • FIG. 1 shows a first embodiment of the blank according to the invention with a locking screw
  • FIG. 2 shows a second embodiment of the blank according to the invention with a locking screw
  • Fig. 3 shows a third embodiment of the blank according to the invention with a locking screw
  • FIG. 4 shows an embodiment of the system according to the invention, which is screwed to an implant
  • 5 shows a fourth embodiment of the blank according to the invention with a closure screw
  • FIG. 6 shows a fifth embodiment of the blank according to the invention with a closure screw.
  • FIG. 1 shows a vertical section through a blank 10 according to the invention comprising a block part 12 and a frame part 14.
  • a closure screw 16 is further shown, comprising a threaded portion 18 and a closure portion 20.
  • the blank 10 includes a channel 22 which is closed by the closure portion 20 of the screw plug 16.
  • the frame part 14 has an inner contour 24, which comprises two indentations 26.
  • the locking screw 16 includes a slot 28 in order to be screwed with a tool can.
  • the block part 12 comprises lithium metasilicate and is frictionally connected to the outside of the frame part 14.
  • the block part 12 may also comprise or consist of a glass-ceramic precursor, which may be converted by heat treatment into a glass-ceramic having a strength suitable for use in a dental restoration.
  • This variant is not explicitly described below. However, it is understood that all advantages and features described below also disclosed in connection with this variant
  • the inner contour 24 of the frame part 14 substantially corresponds to an outer contour of an implant base (not shown).
  • a dental restoration produced from the blank 10 can be placed on the outer contour of the implant base (not shown) and attached via this to the patient's jaw.
  • the inner contour 24 of the frame part 14 is not rotationally symmetrical to the occlusal axis A 0 of the blank 10.
  • the dental restoration produced from the blank 10 can only be placed in one position on the implant base (not shown) and can not be rotated relative to this position.
  • the dental restoration produced from the blank 10 can, for example, via an adhesive bond and / or via a screw with the help of the screw 16 via the inner contour 24 of the frame part 14 with the implant base (not shown) are connected.
  • the dental restoration can also be sintered with the implant base.
  • a ceramic implant base is preferably used to prevent oxidation.
  • the cross-sectional diameter of the closure portion 20 is greater than the cross-sectional diameter of the threaded portion 18. Since the diameter of the channel 22 at the lower end is smaller than the cross-sectional diameter of the closure portion 20 of the screw plug 16, the blank 10 or the dental restoration made from this are screwed by means of the closure screw 16 with the implant base (not shown). When tightening the screw plug 16, the dental restoration is pulled in the direction of the occlusal axis AQ against the implant base.
  • the closure screw 16 in conjunction with the blank 10 according to the invention in addition to the closure function also have a fastening function.
  • FIG. 2 shows a further embodiment of the blank 10 'according to the invention, which can be used with the closure screw 16' shown.
  • the cross-sectional diameter of the closure section 20' and of the threaded section 18 ' are substantially the same, so that the closure screw 16' in conjunction with the blank 10 'has only one closure function.
  • the frame part 14 ' has an outside diameter de, an occlusal wall thickness d 0 and a lateral wall thickness d ⁇ hat.
  • the embodiment of the blank 10 'shown in FIG. 2 has no indentations on the inner contour 24' of the frame part 14 '.
  • FIG. 3 shows a further embodiment of the blank 10 "according to the invention, in which the channel 22" (in contrast to the blanks 10 and 10 'from FIG. 1 and FIG. 2) has threaded passages.
  • the dental restoration made from the blank 10 can be used with a locking screw 16" in which the cross-sectional diameter of the threaded portion 18 "and the cross-sectional diameter of the locking portion 20" are substantially equal and where both the threaded portion 18 "and the locking portion 20" Have threads.
  • the indentations 26 "on the inner contour 24" of the framework part 14 "and the threads on the closure part 20" prevent the dental restoration glued or screwed onto an implant base (not shown) in the channel 22 "being removed from the implant base by pulling in the direction of the occlusal axis A 0 .
  • the framework part 14 "" may also extend completely through the block part 12 “” rather than only part way up to the channel 22 "".
  • the inner contour 24 "" which essentially corresponds to the outer contour of an implant base (not shown), does not include that contour of the frame part 14 "" which defines the channel 22 "".
  • FIG. 4 shows a system 30 according to the invention comprising a blank 10, a closure screw 16 and an implant base 32.
  • the system 30 is screwed to an implant 36 using an implant screw 34.
  • the implant base 32 comprises a screw channel 38 and a connection geometry 40.
  • the connection geometry 40 of the implant base 32 can be inserted accurately into the implant 36 and preferably has an anti-rotation geometry, such as a hexagon, octagon, etc., so that the system 30 in a Screwing with the implant 36 can not be rotated against the implant 36.
  • the implant 36 is inserted into the jawbone of the patient. After a healing period necessary for the implant 36 to heal into the jawbone of the patient, treatment is continued.
  • the dental restoration can be produced from the blank 10 according to the invention and connected to the implant 36 during a single treatment session.
  • the tooth contour 42 of the dental restoration to be produced is first determined in a manner known per se (eg, scanning, CAD construction). subse- Bend the tooth contour 42 is transferred by subtractive processing, for example by means of a computer-controlled CAD / CAM method, on the block portion 12 of the blank 10.
  • the blank 10 can be received in the processing machine via a machine connection part (not shown).
  • the machine attachment part has a portion (not shown) with an outer contour (not shown) which substantially corresponds to the inner contour 24 of the frame part 14.
  • the blank 10 can be screwed to the machine connection part, for example, by means of the closure screw 16. Another possibility is to releasably bond the frame part 14 of the blank 10 to the machine connection part.
  • the machine attachment part preferably comprises a screw channel (not shown) into which the closure screw 16 can be screwed. In the screwed-in state, the channel 22 of the blank 10 is closed by the closure section 20 of the closure screw 16.
  • the block part 12 is subtractive processed, wherein preferably also the closure portion 20 of the closure screw 16 is subtractive processed, so that the desired tooth contour 42 is also generated at the position of the channel 22.
  • a geometry is still introduced into the closure section 20, for example a slot, cross recess, hexagon socket (Allen), Torx, etc.
  • the closure screw 16 can be screwed out of the screw channel or later using a tool be screwed into the screw channel 38 of the implant base 32.
  • the block part 12 of the blank 10 comprises lithium metasilicate, the subtractive processing is very time-efficient and gentle on the material. The wear of the processing tools is significantly lower than with harder materials, so costs are saved. Due to the rapid subtractive processing, the waiting time of the patient is shortened, which facilitates the completion of the treatment in a session.
  • the frictional connection between the block part 12 and the frame part 14 makes it possible to receive the blank 10 for subtractive processing via the frame part 14 in the processing machine.
  • This has the advantage that the block part 12 can be completely processed and no areas -. B. because of an attachment in the processing machine - of be subtracted from the subtractive processing and later reworked.
  • the dentist or dental technician would typically not be able to make the frictional connection himself in his practice because this involves, for example, sintering which must be performed expertly and using specialized equipment.
  • the machined blank 10 is subjected to the described process conditions to at least partially convert the lithium metasilicate of the machined block portion 12 into lithium disilicate.
  • Said machine connection part can be released from the frame part 14 before or after the conversion process.
  • the blank 10 may optionally be cast in plastic (e.g., polyurethane) for subtractive processing, with the restoration, after subtractive machining, being supported by retaining ridges on the remainder of the ground blank 10 and thus in the plastic investment.
  • plastic e.g., polyurethane
  • the blank 10 for subtractive processing can also be received via the implant base 32 in the processing machine.
  • the implant base 32 preferably comprises metal, it must be released from the framework part 14 of the machined blank 10 prior to the conversion process, otherwise the metal of the implant base 32 would oxidize during the conversion process. The removal of the oxide would lead to a fit accuracy in a later connection to the implant 36, which is undesirable.
  • the implant base 32 does not necessarily have to be metallic, but may also be ceramic. In this case, the implant base 32 can be exposed to the process conditions of the conversion without oxidation. The connection between the implant base 32 and the frame part 14 after the conversion can therefore also remain After the conversion, the dental restoration has high stability and strength due to the lithium disilicate and the framework.
  • the often grayish appearance of the lithium disilicate at large wall thicknesses, which is due to a comparatively high translucency, can be corrected by the opaque framework part 14 and / or the availability material, via which the block part 12 is connected to the framework part 14.
  • the dental restoration is therefore only superficially translucent and therefore resembles the appearance of a natural tooth.
  • the framework part 14 comprises zirconia, the desired tooth color can be adjusted very well by means of a color adaptation of the framework part 14.
  • the stain and glaze firing can be carried out separately or in combination with the crystallization firing (conversion of lithium metasilicate to lithium disilicate).
  • the dental restoration can be connected to the healing implant.
  • the implant base 32 is screwed by means of the implant screw 34 with the implant 36, and on the other hand, the frame part 14 is connected to the implant base 32.
  • the framework part 14 and the implant base 32 can be connected with the aid of the closure screw 16, for example after screwing the implant base 32 by means of the implant screw 34.
  • the implant base and the frame part 14 can be glued or sintered. If the implant base 32 consists of an abutment, the bonding is preferably performed before screwing using the implant screw 34, because it can then be performed outside the oral cavity.
  • the inner contour 24 of the frame part 14 and / or the outer contour of the implant base 32 can have indentations 26. These recesses 26 may be designed partially or completely circular.
  • the indentation profile may be designed in various geometric shapes, e.g. semicircular, semi-oval, rectangular, etc.
  • the end plug 16 can be screwed into the screw channel 38 of the implant base 32.
  • the subtractively processed closure part 20 of the closure screw 16 closes the channel 22.
  • the outer contour of the machined closure section 20 corresponds to the corresponding one Section of the desired tooth contour 42. A filling of the channel 22 with a filling material to close this is not required.
  • the implant base is not necessarily a separate part of the implant - as described with reference to FIG. 4 - represents.
  • the implant base can also be formed integrally with the implant, in particular form an implant section.
  • the embodiment of the blank 10 "'shown in Fig. 5 comprises a framework connection part 44 which combines functions of the implant base and the framework part As described in the previous description for the framework part, the framework connection part 44 can also be connected to the block part 12"' of the blank 10
  • the framework connection part comprises a connection geometry 40, with which a dental restoration produced from the blank 10 '"can be connected to an implant 36 (FIG.

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Dentistry (AREA)
  • Ceramic Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Plastic & Reconstructive Surgery (AREA)
  • Manufacturing & Machinery (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Mechanical Engineering (AREA)
  • Dental Prosthetics (AREA)

Abstract

L'invention concerne une ébauche (10'), un système et un procédé de production d'une restauration dentaire par usinage par enlèvement de matière. L'ébauche (10') comprend une partie armature (14') et une partie bloc (12'). La partie armature (14') contient du dioxyde de zirconium (ZrO2) et/ou du titane, et la partie bloc (12') contient du métasilicate de lithium ou un précurseur de vitrocéramique. La partie bloc (12') est reliée à force à la face extérieure de la partie armature (14'). La partie armature (14') comporte un contour intérieur (24') qui correspond sensiblement à un contour extérieur d'une base d'implant. Une restauration dentaire produite à partir de l'ébauche (10') est adaptée pour être reliée à la base d'implant.
EP13759700.1A 2012-09-03 2013-09-03 Ébauche et procédé de production d'une restauration dentaire par usinage par enlèvement de matière Withdrawn EP2892461A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012108153.0A DE102012108153A1 (de) 2012-09-03 2012-09-03 Rohling und Verfahren zur Herstellung einer Dentalrestauration durch substraktive Bearbeitung
PCT/EP2013/068190 WO2014033323A1 (fr) 2012-09-03 2013-09-03 Ébauche et procédé de production d'une restauration dentaire par usinage par enlèvement de matière

Publications (1)

Publication Number Publication Date
EP2892461A1 true EP2892461A1 (fr) 2015-07-15

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EP13759700.1A Withdrawn EP2892461A1 (fr) 2012-09-03 2013-09-03 Ébauche et procédé de production d'une restauration dentaire par usinage par enlèvement de matière

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Country Link
US (1) US20150216635A1 (fr)
EP (1) EP2892461A1 (fr)
DE (1) DE102012108153A1 (fr)
WO (1) WO2014033323A1 (fr)

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ES2730012T3 (es) * 2013-07-04 2019-11-07 Bredent Gmbh & Co Kg Semiproducto para la fabricación de sistemas protésicos dentales, pilares y procedimiento para la fabricación de sistemas protésicos dentales
US10639132B2 (en) * 2014-09-12 2020-05-05 Italo Lozada Dental prosthesis
CN107001974B (zh) 2014-12-03 2020-08-21 路博润公司 包含烷氧基化芳族多元醇化合物的润滑组合物
DE102015212606B3 (de) * 2015-07-06 2016-10-13 Sirona Dental Systems Gmbh Herstellungsverfahren für Zahnersatzteil und Verblendstruktur
JP2017046794A (ja) * 2015-08-31 2017-03-09 株式会社ギコウ 歯科用ミルブランクおよび歯科用ミルブランクを用いた歯科用被切削物の製造装置並びに歯科用被切削物の製造プログラム
DE102016116546A1 (de) 2016-09-05 2018-03-08 Kulzer Gmbh Mehrfarbiger Fräsrohling für Implantat-getragene dentale, prothetische Versorgungen
EP3415114B1 (fr) * 2017-06-14 2021-01-13 Coltène/Whaledent AG Ébauche dentaire comportant un insert
DE102017221344A1 (de) * 2017-11-28 2019-05-29 Sirona Dental Systems Gmbh Zahnersatzformblock und Verfahren zur Herstellung eines Zahnersatzteils aus dem Zahnersatzformblock

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DE102005028637A1 (de) * 2005-06-20 2006-12-21 Ivoclar Vivadent Ag Lithiumsilicat-Glaskeramik
WO2007028787A1 (fr) * 2005-09-05 2007-03-15 Ivoclar Vivadent Ag Prothese dentaire ceramique et son procede de production
DE102010050275A1 (de) * 2010-11-02 2012-05-03 Degudent Gmbh Lithiumsilikat-Gläser oder -Glaskeramiken, Verfahren zu deren Herstellung sowie deren Verwendung

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US9220576B2 (en) * 2003-08-07 2015-12-29 Ivoclar Vivadent Ag Machining of ceramic materials
DE10336913C9 (de) 2003-08-07 2019-02-21 Ivoclar Vivadent Ag Verwendung eines Lithiumsilicatmaterials
US7955159B2 (en) * 2003-08-07 2011-06-07 Ivoclar Vivadent Ag Machining of ceramic materials
EP1506745A1 (fr) 2003-08-15 2005-02-16 Jeanette Mörmann Ebauche et procédé de fabrication d'une restauration dentaire
EP2361601A1 (fr) * 2010-02-25 2011-08-31 3M Innovative Properties Company Particules de verre et/ou de vitrocéramique dans une composition pour l'application sur un article dentaire, procédé et utilisation correspondants

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WO2007028787A1 (fr) * 2005-09-05 2007-03-15 Ivoclar Vivadent Ag Prothese dentaire ceramique et son procede de production
DE102010050275A1 (de) * 2010-11-02 2012-05-03 Degudent Gmbh Lithiumsilikat-Gläser oder -Glaskeramiken, Verfahren zu deren Herstellung sowie deren Verwendung

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US20150216635A1 (en) 2015-08-06
DE102012108153A1 (de) 2014-03-06

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