WO2012142127A1 - Dental implant and crown and method of placing a dental implant and crown in a single visit - Google Patents

Dental implant and crown and method of placing a dental implant and crown in a single visit Download PDF

Info

Publication number
WO2012142127A1
WO2012142127A1 PCT/US2012/033074 US2012033074W WO2012142127A1 WO 2012142127 A1 WO2012142127 A1 WO 2012142127A1 US 2012033074 W US2012033074 W US 2012033074W WO 2012142127 A1 WO2012142127 A1 WO 2012142127A1
Authority
WO
WIPO (PCT)
Prior art keywords
implant portion
implant
cement
crown
volume
Prior art date
Application number
PCT/US2012/033074
Other languages
French (fr)
Inventor
Simon P. Mcdonald
Original Assignee
Triodent Holdings Limited
Triodent Corporation
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 Triodent Holdings Limited, Triodent Corporation filed Critical Triodent Holdings Limited
Publication of WO2012142127A1 publication Critical patent/WO2012142127A1/en

Links

Classifications

    • 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
    • A61C8/0018—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the shape
    • A61C8/0037—Details of the shape
    • A61C8/0045—Details of the shape with a stepped 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
    • A61C8/0093—Features of implants not otherwise provided for
    • A61C8/0098—Immediate loaded implants
    • 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
    • A61C8/0018—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the shape
    • A61C8/0037—Details of the shape
    • A61C8/0043—Details of the shape having more than one root

Definitions

  • the object of this invention is to enable a dentist to place an implant and crown in one visit by the patient, immediately following the dental extraction.
  • the contact points of the crown are dictated by the final position of the implant. If the contact points of a pre-made crown for use with a screw implant are even a few microns off, it could easily not fit into the space left by the extracted tooth.
  • Existing methods are generally not favored by dentists, as dentists are trained to drill teeth, but the majority is not experienced with drilling into the jaw, potentially requiring a trip to the oral surgeon as part of the process, which adds time and expense.
  • Existing dental appliances used in replacing the native tooth also contribute the time and expense of the process.
  • the present invention seeks to address the drawbacks of existing methods for extracting a native tooth and replacing it with an implant and crown in a single visit to the dentist and by changing the methodology involved in placement of the implant to capitalized on the basic skills and training of the majority of dentists.
  • the method comprises of:
  • a sheet of flexible material that is approximately 0.5mm to 1 mm thick is placed over the crown and the patient is asked to bite down. The purpose of this is to ensure that the final position of the crown is at least 0.5mm below the occlusion.
  • the crown can be removed to assist removing any residual bone cement.
  • a combined crown and implant may be used in the inventive method, the combined crown and implant comprising of:
  • a dental crown portion preferably made of ceramic.
  • an implant portion preferably made of titanium or zirconium.
  • dental crown portion and the implant portion are cemented or otherwise joined during manufacture and are supplied as one unit.
  • Figure 1 shows a side elevation and partial cross-section view of a native tooth to be extracted and further show the surrounding teeth and structures.
  • Figure 2 shows a side elevation and partial cross-section view of a extraction socket left after extraction of a native tooth, and further show the surrounding teeth and structures.
  • Figure 3 shows a side elevation and partial cross-section view of a dental crown placed in a extraction socket after extraction of a native tooth, and further show the surrounding teeth and structures.
  • Figure 4 shows a side elevation and partial cross-section view of a dental implant and dental crown placed in a extraction socket after extraction of a native tooth, and further show the surrounding teeth and structures.
  • Figure 5 shows a side elevation view of a dental implant and dental crown according to the present invention.
  • Figure 6 shows a side elevation and partial cross-section view of a dental crown placed in a extraction socket after extraction of a native tooth, and further show the surrounding teeth and structures.
  • the method of replacing a native tooth with a dental appliance during a dental procedure first comprises the steps of removing the native tooth 10, having a root portion 12 and crown portion 14, from its socket 16 within the mouth of the patient, wherein said removal leaves an extraction socket 18 (Figure 2) having a volume and a shape that corresponds to the configuration of the socket portion 16 and root portion 12 of the extracted native tooth 10.
  • the dentist next selects a restorative dental appliance 20 having an implant portion 22 and a crown portion 24, wherein the crown portion 24 makes proper inter-proximal contact with a first and second tooth 26, 28 ( Figure 1) adjacent the native tooth 10 (before extraction) and the implant portion 22 fills a volume that is less than the volume of the extraction socket 18.
  • the extraction socket 18 is filled with a volume of cement 30, where the cement 30 secures the implant portion 22 within the extraction socket 18.
  • the dental appliance 20 is positioned within the patient's mouth wherein the implant portion 22 sets within the volume of cement 30.
  • the cement 30 is allowed to harden, securing the dental appliance 20 in position within the extraction socket 18.
  • the native tooth extraction step is generally accomplished using simple extraction methods where the native tooth being extracted is visible in the mouth and can be extracted while the patient is given a local anesthetic.
  • Simple tooth extractions may also be referred to as closed extractions, intra-alveolar extractions, or forceps extractions.
  • a simple extraction requires use of an instrument to elevate and/or grasp the visible portion of the native tooth where the tooth is lifted using an elevator and dental forceps are used to rock the tooth back and forth until the periodontal ligament has been broken and the tooth socket loosened to enable the tooth be removed.
  • the socket 16 of the native tooth 10 becomes the extraction socket 18, generally having the same shape, size, and configuration as the socket 16 and native tooth root portion 12.
  • the native tooth 10 can be extracted using a combination of steps including drilling of portions of the native tooth crown and root to facilitate the closed extraction.
  • the dentist selects the pre-fabricated restorative dental appliance 20 consisting of an implant portion 22 and a crown portion 24. It is contemplated that the restorative dental appliance 20 is selected from a kit consisting of a plurality of different sized implant portions 22 and different sized crown portions 24.
  • the implant portion 22 is configured to fill a volume less than the volume of the extraction socket 18 with the remaining volume to be filled by the cement 30.
  • the implant portion 22 consists of a first material that is preferably a biocompatible metal, such as titanium, zirconium, or suitable alloys made from these materials.
  • the dentist can take a preliminary impression of the native tooth and cast a model that is used to obtain proper measurements of the crown portion 14.
  • the dentist may still be required to make minor, chair-side modifications to the crown portion 24 to ensure proper fit.
  • the crown portion 24 consists of a second material, preferably a suitable biocompatible ceramic, such as a lithium silicate ceramic.
  • the kit may comprise implant portions and crown portions pre-selected to replicate a standardized range of human teeth sizes and shapes and assembled and cemented together at the point of manufacture of the dental appliance.
  • the implant portion 22 consists of a plurality of concentrically aligned elements 32 each having a middle and a width at the middle wherein the widths are progressively smaller as the implant portion 22 proceeds from a top of the implant portion 34 to towards the bottom 36 of the implant portion. This enables the implant portion 22 to have a tapering profile corresponding to the shape of the extraction socket 18 ( Figure 4, Figure 6).
  • the implant portion 22 may consist of a plurality of eccentricafiy aligned elements each having a middle and a width at the middle wherein the widths are progressively smaller as the implant portion proceeds from a top of the implant portion to towards the bottom of the imp!ant portion.
  • This enables the implant portion to have a tapering profile corresponding to the shape of an extraction socket that has a curved profile, as opposed to being substantially linear.
  • the implant portion 22 preferably includes "cement locking" structures 38 that may be in the form of an undulating contour ⁇ Figure 4) or flanges that will secure the implant portion within the cement 30.
  • the implant portion 22 can also be described as a stack of truncated cones that may be ovoid and do not necessarily have to same axis, meaning that the implant may be curved as per the root it is replacing.
  • the position of the implant after it is secured in position dictates fine details of the size of the crown as it is difficult for the dentist to accurately predict the three-dimensional orientation of the implant before it is permanently secured in position. This adds time to the overall process as the patient is required to have subsequent office visits for measurement and installation of the permanent crown.
  • the present inventive method changes the known procedure by letting a properly fitted crown dictate the three-dimensional orientation of the implant. Accordingly, as seen in Figure 3, the next step in the present inventive method consists of adjusting the contours of the crown portion 24, particularly the mesial-distal length, to enable the crown portion 22 to fit properly fit in the space previously filled by the crown portion of the extracted tooth. Once the crown portion 24 is selected, the implant portion 22 is selected and an implant plastic duplicate or the implant portion is fitted to the crown portion 24 and inserted into the extraction socket 12 to confirm proper fit of both pieces.
  • the dentist prepares the cement 30, coats the implant portion 22 with the cement 30, and injects cement 30 into the extraction socket 20.
  • the cement 30 consists of bone cement consisting of a fatty acid and calcium carbonate-based composition, which gives the cement bone-like mechanical properties. Bone cement 30 of this type is sold under the trade name KRYPTONITE by Doctor's Research Group, Inc. It is also contemplated that the cement 30 consists of a Portland-type of cement that primarily consists of CaO, Si02, AI203 and other ingredients such as Fe203, MgO or a Portiand-type of cement that primarily consists of CaO, Si02, AI203 and other ingredients such as Fe203, MgO and polyvinyl alcohol fibers. The cement 30 can also consist of a po!y methyl methacrylate cement or hydroxyl-apatite.
  • the dental appliance 20 is then seated within the extraction socket 18.
  • the implant portion 22 and crown portion 24 are preferably fitted together but not permanently bonded together.
  • the properly fitted crown portion 24 insures that the implant portion 22 is properly cemented in the correct mesial-distal position within the extraction socket 18.
  • a sheet of flexible material having a thickness of approximately 0.5 - 1.0 mm is placed over the crown portion 24 and the patient is asked to bite down. This will 'sink' the dental appliance 20 within the extraction socket 18 below the occlusal plane of the first and second adjacent teeth 26, 28, thereby reducing the initial bite-down forces that the dental appliance 20 could encounter during regular mastication, Excess cement 30 is removed as it sets.
  • the crown portion 24 can be removed to assist in removing any residual bone cement from the implant portion 22 or extraction socket 18.
  • the crown portion 24 can then be cemented to the implant portion 22 using a temporary or permanent cement by known methods.
  • While a one embodiment of the present inventive method has been disclosed above where the dentist selects a suitable crown and implant portion from a kit including multiple sizes of these pieces and bonds these pieces together as part of the process, variations of the method are contemplated.
  • an impression of the native tooth being extracted is taken and a plaster model is prepared from the impression.
  • An implant portion in accordance with what has been described herein is positioned to be received by a socket made in the piaster model.
  • the plaster model and implant portion can then be used to prepare a crown portion using known CAD/CAM techniques or traditional crown manufacturing methods.
  • the finished crown portion can then be bonded to the implant portion at the dental lab and shipped to the dentist for use.
  • the dentist can extract the native tooth and place the new implant and crown with only minor, chair-side adjustments.
  • FIGS. 5 and 6 are if!ustrative of the aspect of the present invention.
  • a plurality of implant portions 22 and crown portions 24 are manufactured in a plurality of configurations and color shades to address variance in native tooth size/shape and color/shade from one patient to another.
  • the implant portions 22 and crown portions 24 are bonded together at the point of manufacture and packaged as kit.
  • Use of the kit of dental appliances 20 described herein with the method describe above would proceed in the following manner. Prior to the planned extraction of the native tooth 10, the dentist takes measurements of the crown portion 14, either directly in the mouth of the patient or by taking an impression which can then be cast in plaster and measured.
  • the most significant measurements are the maximum horizontal mesio-distal length of the crown portion 14 at its equator and the vertical height of the crown portion 14 from the gingival margin 14a to the cusp tips 14(b) (seen in Figure 1). Radiographic and other clinical assessments of the native tooth 10 can also be made to ensure that the procedure is suitable for the patient.
  • the dentist maintains or orders kits containing a variety of tooth-types and sizes of the dental appliance 20. After the native tooth 10 has been extracted, the dentist packs the extraction socket 18 with sterile cotton gauze or uses another method to control the bleeding.
  • the dentist selects a dental appliance 20 from the kit and accurately adjusts the contours of the crown portion 24 (especially the mesio-distal length) so that it fits into the extraction socket 20 gap created by the removal of the native tooth 10.
  • One method of achieving this is to fit the dental appliance 20 in upside-down.
  • the dental appliance 20 is trial-fitted into the extraction socket 18 to ensure a satisfactory fit.
  • the dental appliance 20 has a slightly larger mesio-distal length and a similar vertical height as compared with the crown portion 14 of the native tooth 10. The remaining steps of the procedure remain unchanged from what has been disclosed above.

Landscapes

  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Orthopedic Medicine & 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)
  • Dental Prosthetics (AREA)

Abstract

The present invention relates to a method of replacing a native tooth with a dental appliance during a dental procedure, the dental appliance consisting of an implant portion (22) and a crown portion (24), the method comprising the steps of: removing the native tooth from the mouth of the patient, wherein said removal leaves an extraction socket (18) in the mouth of the patient, the extraction socket having a volume and a shape that corresponds to the configuration of a root portion of the removed native tooth; selecting a dental appliance, wherein the crown portion makes proper inter-proximal contact with a first and second tooth each being adjacent the native tooth before removal of the native tooth and the implant portion fills a volume that is less than the volume of the extraction socket; filling the extraction socket left after removal of the native tooth with a volume of cement (30), the cement selected to secure the implant portion within the extraction socket; positioning the dental appliance in the mouth of the patient wherein the implant portion sets within the volume of cement; and enabling the cement to harden and hold the dental appliance in position.

Description

DENTAL IMPLANT AND CROWN AND METHOD OF PLACING A DENTAL IMPLANT AND
CROWN IN A SINGLE VISIT
FIELD OF THE INVENTION
The object of this invention is to enable a dentist to place an implant and crown in one visit by the patient, immediately following the dental extraction.
BACKGROUND OF THE INVENTION
Replacement of a native tooth often times is a lengthy and complicated process that requires steps including: (1 ) removal of the native tooth by the dental professional, (2) drilling into the alveolar/jaw bone to form a new socket for receiving a dental implant, (3) stabilizing the dental implant and enabling time for sufficient osseo-integration to permanently secure the impiant into position; and (4) preparing a suitably configured crown based on the three- dimensional orientation of the implant. Traditional methods to fix the dental implant include a screw and thread method or a drill and screw method. The problem with these methods is that the dentist cannot accurately predict the final three dimensional orientation of the impiant relative to the two neighboring teeth. This results in the dentist having to place the implant and then take an impression and use an indirect model to make a crown. The contact points of the crown are dictated by the final position of the implant. If the contact points of a pre-made crown for use with a screw implant are even a few microns off, it could easily not fit into the space left by the extracted tooth. Existing methods are generally not favored by dentists, as dentists are trained to drill teeth, but the majority is not experienced with drilling into the jaw, potentially requiring a trip to the oral surgeon as part of the process, which adds time and expense. Existing dental appliances used in replacing the native tooth also contribute the time and expense of the process. SUMMARY OF THE INVENTION
The present invention seeks to address the drawbacks of existing methods for extracting a native tooth and replacing it with an implant and crown in a single visit to the dentist and by changing the methodology involved in placement of the implant to capitalized on the basic skills and training of the majority of dentists. The method comprises of:
1. Extraction of the tooth.
2. Selection of an appropriate sized and shaped dental implant that fits inside the extraction socket, ideally using matched duplicates.
3. Selection of a pre-manufactured dental crown.
4. Adjustment of the contours of the crown {especially mesial-distal length) so that it fits into the gap created by the removal of the tooth.
5. Optionally, trial fitting of the crown and implant duplicate to ensure satisfactory fit.
6. Mix bone cement and coat implant and inject into extraction socket.
7. Seat implant and crown together into socket. Note that the crown and implant may be either bonded together or only fitted together. The crown ensures that the implant is cemented in the correct mesial-distal position.
8. Optionally, a sheet of flexible material that is approximately 0.5mm to 1 mm thick is placed over the crown and the patient is asked to bite down. The purpose of this is to ensure that the final position of the crown is at least 0.5mm below the occlusion.
9. Excess bone cement is removed as it sets so that there is no bone cement on the implant surface 2-3mm below the gingival margin.
10. When the bone cement is hard, the crown can be removed to assist removing any residual bone cement.
11. The crown is cemented onto the implant using either temporary or permanent cement. in another aspect of the present invention, a combined crown and implant may be used in the inventive method, the combined crown and implant comprising of:
1. a dental crown portion, preferably made of ceramic.
2. an implant portion, preferably made of titanium or zirconium.
3. wherein the dental crown portion and the implant portion are cemented or otherwise joined during manufacture and are supplied as one unit.
4. wherein the device is manufactured in a plurality of sizes and colours for each
anatomical tooth-type.
The advantages of this method and device over the prior art are as follows:
1. The implant and crown are placed immediately following the extraction.
2. No drilling of bone is required making the procedure easier and less risky for the dentist and patient.
3. No second surgical procedure is required as per a conventional implant.
4. No secondary indirect procedure to construct a permanent crown is required.
5. Lower cost for the patient.
BRIEF DESCRIPTION OF DRAWINGS
Figure 1 shows a side elevation and partial cross-section view of a native tooth to be extracted and further show the surrounding teeth and structures.
Figure 2 shows a side elevation and partial cross-section view of a extraction socket left after extraction of a native tooth, and further show the surrounding teeth and structures..
Figure 3 shows a side elevation and partial cross-section view of a dental crown placed in a extraction socket after extraction of a native tooth, and further show the surrounding teeth and structures. Figure 4 shows a side elevation and partial cross-section view of a dental implant and dental crown placed in a extraction socket after extraction of a native tooth, and further show the surrounding teeth and structures.
Figure 5 shows a side elevation view of a dental implant and dental crown according to the present invention.
Figure 6 shows a side elevation and partial cross-section view of a dental crown placed in a extraction socket after extraction of a native tooth, and further show the surrounding teeth and structures. DETAILED DESCRIPTION OF INVENTION
Referring to the appended figures, in a first embodiment of the present invention, the method of replacing a native tooth with a dental appliance during a dental procedure first comprises the steps of removing the native tooth 10, having a root portion 12 and crown portion 14, from its socket 16 within the mouth of the patient, wherein said removal leaves an extraction socket 18 (Figure 2) having a volume and a shape that corresponds to the configuration of the socket portion 16 and root portion 12 of the extracted native tooth 10. The dentist next selects a restorative dental appliance 20 having an implant portion 22 and a crown portion 24, wherein the crown portion 24 makes proper inter-proximal contact with a first and second tooth 26, 28 (Figure 1) adjacent the native tooth 10 (before extraction) and the implant portion 22 fills a volume that is less than the volume of the extraction socket 18. The extraction socket 18 is filled with a volume of cement 30, where the cement 30 secures the implant portion 22 within the extraction socket 18. The dental appliance 20 is positioned within the patient's mouth wherein the implant portion 22 sets within the volume of cement 30. The cement 30 is allowed to harden, securing the dental appliance 20 in position within the extraction socket 18.
The native tooth extraction step is generally accomplished using simple extraction methods where the native tooth being extracted is visible in the mouth and can be extracted while the patient is given a local anesthetic. Simple tooth extractions may also be referred to as closed extractions, intra-alveolar extractions, or forceps extractions. A simple extraction requires use of an instrument to elevate and/or grasp the visible portion of the native tooth where the tooth is lifted using an elevator and dental forceps are used to rock the tooth back and forth until the periodontal ligament has been broken and the tooth socket loosened to enable the tooth be removed. No cutting or drilling of the alveolar bone is required in a simple extraction and, as seen if Figure 1 and Figure 2, the socket 16 of the native tooth 10 becomes the extraction socket 18, generally having the same shape, size, and configuration as the socket 16 and native tooth root portion 12. Alternatively, the native tooth 10 can be extracted using a combination of steps including drilling of portions of the native tooth crown and root to facilitate the closed extraction.
Once the native tooth 10 has been extracted, the dentist selects the pre-fabricated restorative dental appliance 20 consisting of an implant portion 22 and a crown portion 24. It is contemplated that the restorative dental appliance 20 is selected from a kit consisting of a plurality of different sized implant portions 22 and different sized crown portions 24. The implant portion 22 is configured to fill a volume less than the volume of the extraction socket 18 with the remaining volume to be filled by the cement 30. The implant portion 22 consists of a first material that is preferably a biocompatible metal, such as titanium, zirconium, or suitable alloys made from these materials. To select the crown portion, 24, the dentist can take a preliminary impression of the native tooth and cast a model that is used to obtain proper measurements of the crown portion 14. As the crown portion 14 is selected from a kit including multiple, standardized sizes, the dentist may still be required to make minor, chair-side modifications to the crown portion 24 to ensure proper fit. The crown portion 24 consists of a second material, preferably a suitable biocompatible ceramic, such as a lithium silicate ceramic. In another embodiment, the kit may comprise implant portions and crown portions pre-selected to replicate a standardized range of human teeth sizes and shapes and assembled and cemented together at the point of manufacture of the dental appliance.
The present inventive method has been developed for use with both molar and premolars and Figures 4-6 show a dental implant and dental crown for use in both applications. As seen in Figures 5-6, the implant portion 22 consists of a plurality of concentrically aligned elements 32 each having a middle and a width at the middle wherein the widths are progressively smaller as the implant portion 22 proceeds from a top of the implant portion 34 to towards the bottom 36 of the implant portion. This enables the implant portion 22 to have a tapering profile corresponding to the shape of the extraction socket 18 (Figure 4, Figure 6). It is also contemplated that the implant portion 22 may consist of a plurality of eccentricafiy aligned elements each having a middle and a width at the middle wherein the widths are progressively smaller as the implant portion proceeds from a top of the implant portion to towards the bottom of the imp!ant portion. This enables the implant portion to have a tapering profile corresponding to the shape of an extraction socket that has a curved profile, as opposed to being substantially linear. In both embodiments, the implant portion 22 preferably includes "cement locking" structures 38 that may be in the form of an undulating contour {Figure 4) or flanges that will secure the implant portion within the cement 30. In the embodiment shown in Figures 5-6, the implant portion 22 can also be described as a stack of truncated cones that may be ovoid and do not necessarily have to same axis, meaning that the implant may be curved as per the root it is replacing.
In known methods for extracting a native tooth and replacing the same with an implant and crown, the position of the implant after it is secured in position dictates fine details of the size of the crown as it is difficult for the dentist to accurately predict the three-dimensional orientation of the implant before it is permanently secured in position. This adds time to the overall process as the patient is required to have subsequent office visits for measurement and installation of the permanent crown. The present inventive method changes the known procedure by letting a properly fitted crown dictate the three-dimensional orientation of the implant. Accordingly, as seen in Figure 3, the next step in the present inventive method consists of adjusting the contours of the crown portion 24, particularly the mesial-distal length, to enable the crown portion 22 to fit properly fit in the space previously filled by the crown portion of the extracted tooth. Once the crown portion 24 is selected, the implant portion 22 is selected and an implant plastic duplicate or the implant portion is fitted to the crown portion 24 and inserted into the extraction socket 12 to confirm proper fit of both pieces.
In the next step of the inventive method, the dentist prepares the cement 30, coats the implant portion 22 with the cement 30, and injects cement 30 into the extraction socket 20. The cement 30 consists of bone cement consisting of a fatty acid and calcium carbonate-based composition, which gives the cement bone-like mechanical properties. Bone cement 30 of this type is sold under the trade name KRYPTONITE by Doctor's Research Group, Inc. It is also contemplated that the cement 30 consists of a Portland-type of cement that primarily consists of CaO, Si02, AI203 and other ingredients such as Fe203, MgO or a Portiand-type of cement that primarily consists of CaO, Si02, AI203 and other ingredients such as Fe203, MgO and polyvinyl alcohol fibers. The cement 30 can also consist of a po!y methyl methacrylate cement or hydroxyl-apatite.
The dental appliance 20 is then seated within the extraction socket 18. The implant portion 22 and crown portion 24 are preferably fitted together but not permanently bonded together. The properly fitted crown portion 24 insures that the implant portion 22 is properly cemented in the correct mesial-distal position within the extraction socket 18. A sheet of flexible material having a thickness of approximately 0.5 - 1.0 mm is placed over the crown portion 24 and the patient is asked to bite down. This will 'sink' the dental appliance 20 within the extraction socket 18 below the occlusal plane of the first and second adjacent teeth 26, 28, thereby reducing the initial bite-down forces that the dental appliance 20 could encounter during regular mastication, Excess cement 30 is removed as it sets. It is desirable to remove excess cement on the implant portion 22 to a level that is 2.0 - 3.0 mm below the gingival margin to promote soft tissue growth in this area. When the cement 30 has hardened, the crown portion 24 can be removed to assist in removing any residual bone cement from the implant portion 22 or extraction socket 18. The crown portion 24 can then be cemented to the implant portion 22 using a temporary or permanent cement by known methods.
While a one embodiment of the present inventive method has been disclosed above where the dentist selects a suitable crown and implant portion from a kit including multiple sizes of these pieces and bonds these pieces together as part of the process, variations of the method are contemplated. In another embodiment of the present inventive method, an impression of the native tooth being extracted is taken and a plaster model is prepared from the impression. An implant portion in accordance with what has been described herein is positioned to be received by a socket made in the piaster model. The plaster model and implant portion can then be used to prepare a crown portion using known CAD/CAM techniques or traditional crown manufacturing methods. The finished crown portion can then be bonded to the implant portion at the dental lab and shipped to the dentist for use. As the crown portion has been modeled on the native tooth anatomy, the dentist can extract the native tooth and place the new implant and crown with only minor, chair-side adjustments.
Another aspect of the present invention involves utilization of prefabricated and preassembled crown and implant portions to further facilitate time reduction of the process and expense to the patient. Figures 5 and 6 are if!ustrative of the aspect of the present invention. A plurality of implant portions 22 and crown portions 24 are manufactured in a plurality of configurations and color shades to address variance in native tooth size/shape and color/shade from one patient to another. The implant portions 22 and crown portions 24 are bonded together at the point of manufacture and packaged as kit. Use of the kit of dental appliances 20 described herein with the method describe above would proceed in the following manner. Prior to the planned extraction of the native tooth 10, the dentist takes measurements of the crown portion 14, either directly in the mouth of the patient or by taking an impression which can then be cast in plaster and measured. The most significant measurements are the maximum horizontal mesio-distal length of the crown portion 14 at its equator and the vertical height of the crown portion 14 from the gingival margin 14a to the cusp tips 14(b) (seen in Figure 1). Radiographic and other clinical assessments of the native tooth 10 can also be made to ensure that the procedure is suitable for the patient. The dentist maintains or orders kits containing a variety of tooth-types and sizes of the dental appliance 20. After the native tooth 10 has been extracted, the dentist packs the extraction socket 18 with sterile cotton gauze or uses another method to control the bleeding. The dentist then selects a dental appliance 20 from the kit and accurately adjusts the contours of the crown portion 24 (especially the mesio-distal length) so that it fits into the extraction socket 20 gap created by the removal of the native tooth 10. One method of achieving this is to fit the dental appliance 20 in upside-down. The dental appliance 20 is trial-fitted into the extraction socket 18 to ensure a satisfactory fit. Ideally, the dental appliance 20 has a slightly larger mesio-distal length and a similar vertical height as compared with the crown portion 14 of the native tooth 10. The remaining steps of the procedure remain unchanged from what has been disclosed above.
While the present invention has been described in connection with a specific application, this application is exemplary in nature and is not intended to be limiting on the possible applications of this invention. It will be understood that modifications and variations may be effected without departing from the spirit and scope of the present invention. It will be appreciated that the present disclosure is intended as an exemplification of the invention and is not intended to limit the invention to the specific embodiments illustrated and described. The disclosure is intended to cover, by the appended claims, all such modifications as fall within the scope of the claims.

Claims

I claim:
1. A method of replacing a native tooth with a dental appliance during a dental procedure, the dental appliance consisting of an implant portion and a crown portion, the method comprising the steps of: a. removing the native tooth from the mouth of the patient, wherein said removal leaves an extraction socket in the mouth of the patient, the extraction socket having a volume and a shape that corresponds to the configuration of a root portion of the removed native tooth;
b. selecting a dental appliance, wherein the crown portion makes proper inter-proximal contact with a first and second tooth each being adjacent the native tooth before removal of the native tooth and the implant portion fills a volume that is less than the volume of the extraction socket;
c. filling the extraction socket left after removal of the native tooth with a volume of cement, the cement selected to secure the implant portion within the extraction socket;
d. positioning the dental appliance in the mouth of the patient wherein the implant portion sets within the volume of cement; and e. enabling the cement to harden and hold the dental appliance in position.
2. The method of Claim 1 wherein the cement consists of a bone cement, the bone cement consisting of a fatty acid and calcium carbonate-based composition.
3. The method of Claim 2 wherein the bone cement is hydroxyl-apatite.
4. The method of Claim 1 wherein the implant portion consists of a biocompatible metal.
5. The method of Claim 1 wherein the crown portion consists of a biocompatible ceramic.
6. The method of Claim 1 wherein the implant portion consists of a plurality of concentrically aligned elements each having a middle and a width at the middle wherein the widths are progressively smaller as the implant portion proceeds from a top of the implant portion to towards the bottom of the implant portion enabling the implant portion to have a tapering profile corresponding to the shape of the extraction socket.
7. The method of Claim 1 wherein the implant portion consists of a plurality of eccentrically aligned elements each having a middle and a width at the middle wherein the widths are progressively smaller as the implant portion proceeds from a top of the implant portion to towards the bottom of the implant portion enabling the implant portion to have a tapering profile corresponding to the shape of the extraction socket.
8. The method of Claim 1 wherein the implant portion consists of a plurality of cement locking structures.
9. The method of Claim 1 wherein the restorative dental appliance is selected from a kit consisting of a plurality of dental appliance each having different sized implant portions and different sized crown portions.
10. The method of Claim 1 wherein the cement consists of a Portland-type of cement that primarily consists of CaO, Si02, AI203 and other ingredients such as Fe203, MgO.
11. The method of Claim 1 wherein the cement consists of a Portland-type of cement that primarily consists of CaO, Si02, AI203 and other ingredients such as Fe203, MgO and polyvinyl alcohol fibers.
12. The method of Claim 1 wherein the cement consists of a poly methyl methacrylate cement.
13. A method of replacing a native tooth with a dental appliance during a dental procedure, the dental appliance consisting of an implant portion, the method comprising the steps of:
a. removing the native tooth from the mouth of the patient, wherein said removal leaves an extraction socket in the mouth of the patient, the extraction socket having a volume and a shape that corresponds to the configuration of a root portion of the removed native tooth;
b. selecting an implant portion, wherein the implant portion fills a volume that is less than the volume of the extraction socket left after removal of the native tooth;
c. filling the extraction socket with a volume of cement, the cement selected to secure the implant portion within the extraction socket;
d. positioning the implant portion in the mouth of the patient wherein the implant portion sets within the volume of cement; and e. enabling the cement to harden and hold the implant portion in position.
14. The method of Claim 13 wherein the cement consists of a bone cement, the bone cement consisting of a fatty acid and calcium carbonate-based composition.
15. The method of Claim 13 wherein the first material consists of a biocompatible metal.
16. The method of Claim 13 wherein the implant portion consists of a plurality of concentrically aligned elements each having a middle and a width at the middle wherein the widths are progressively smaller as the implant portion proceeds from a top of the implant portion to towards the bottom of the implant portion enabling the implant portion to have a tapering profile corresponding to the shape of the extraction socket.
17. The method of Claim 13 wherein the implant portion consists of a plurality of eccentrically aligned elements each having a middle and a width at the middle wherein the widths are progressively smaller as the implant portion proceeds from a top of the implant portion to towards the bottom of the implant portion enabling the implant portion to have a tapering profile corresponding to the shape of the extraction socket.
18. The method of Claim 13 wherein the implant portion consists a plurality of cement locking structures.
19. The method of Claim 13 wherein the dental appliance further consists of a crown portion and the method further consists of the step of selecting a preassembled implant portion and crown portion, wherein the crown portion makes proper interproximal contact with a first and second tooth each being adjacent the native tooth before removal of the native tooth.
20. The method of Claim 19 wherein the crown portion consists of a biocompatible ceramic.
21. The method of Claim 19 wherein the restorative dental appliance is selected from a kit consisting of a plurality of dental appliance each having different sized implant portions and different sized crown portions.
22. The method of Claim 3 wherein the dental appliance further consists of a crown portion and the method further consists of the step of selecting a crown portion configured to make proper interproximal contact with a first and second tooth each being adjacent the native tooth before removal of the native tooth and affixing the crown portion to the implant portion.
23. The method of Claim 19 wherein the step of affixing the crown portion to the implant portion consists of removable affixing the crown portion to the implant portion.
24. The method of Claim 19 wherein the step of affixing the crown portion to the implant portion consists of permanently affixing the crown portion to the implant portion.
25. The method of Claim 13 wherein the cement consists of a Portland-type of cement that primarily consists of CaO, Si02, AI203 and other ingredients such as Fe203, MgO.
26. The method of Claim 13 wherein the cement consists of a Portland-type of cement that primariiy consists of CaO, Si02t AI203 and other ingredients such as Fe203, MgO and polyvinyl alcohol fibers.
27. The method of Claim 13 wherein the cement consists of a poly methyl methacrylate cement.
28. A method of manufacturing a dental appliance consisting of an implant portion and a crown portion for use in a dental procedure for removing and replacing a native tooth with the dental appliance, the dental procedure including the steps of removing the native tooth from the mouth of the patient, wherein said removal leaves a extraction socket, the extraction socket having a volume and a shape that corresponds to the configuration of a root portion of the removed native tooth, selecting a properly sized and configured dental appliance, wherein the implant portion fills a volume that is less than the volume of the extraction socket, filling the extraction socket with a volume of cement, positioning the dental appliance in the mouth of the patient wherein the implant portion sets within the volume of cement; and enabling the cement to harden and hold the dental appliance in position, the method of manufacture comprising the steps of: a. preparing an implant portion in a plurality of sizes and configurations to adapt to a plurality of sizes and volumes of extraction sockets, the implant portion manufactured from a first material;
b. preparing a crown portion in a plurality sizes and configurations to adapt to a plurality of sizes and configurations of the removed native tooth, the crown portion being manufactured from a second material; and
c. affixing one of the plurality of crown portions to one of the plurality of implant portions at the point of manufacture of the crown and implant portions.
29. The method of manufacture of Claim 28 further consisting of preparing the implant portion from a plurality of concentrically aligned elements each having a middle and a width at the middle wherein the widths are progressively smaller as the implant portion proceeds from a top of the implant portion to towards the bottom of the implant portion enabling the implant portion to have a tapering profile corresponding to the shape of the extraction socket.
30. The method of manufacture of Ciaim 28 further consisting of preparing the implant portion from a plurality of eccentrically aligned elements each having a middle and a width at the middle wherein the widths are progressively smaller as the implant portion proceeds from a top of the implant portion to towards the bottom of the implant portion enabling the implant portion to have a tapering profile corresponding to the shape of the extraction socket.
31. The method manufacture of Claim 28 further consisting of the step of preparing the implant portion with a plurality of cement locking structures.
32. The method of manufacture of Claim 28 wherein the first material is a biocompatible metal.
33. The method of manufacture of Claim 28 wherein the second material is a biocompatible ceramic.
34. The method of manufacture of Claim 28 further consisting of packaging a plurality of dental appliances in a plurality of sizes and configurations for distribution in a kit.
35. The method of manufacture of Claim 28 wherein the step of affixing one of the plurality of crown portions to the one of the plurality of implant portions consists of removable affixing one of the plurality of crown portions to the one of the plurality of implant portions.
36. The method of manufacture of Claim 28 wherein the step of affixing one of the plurality of crown portions to the one of the plurality of implant portions consists of permanently affixing one of the plurality of crown portions to the one of the plurality of implant portions.
37. A pre-assembled dental restoration device for restoring an extracted native tooth having a root and crown and wherein the extraction of the native tooth leaves an extraction socket having a volume, the dental restoration device comprising: a) an implant portion configured to fill a volume less than the volume of the extraction socket; and
b) a crown portion affixed to the root portion at the point of manufacture.
38. The pre-assembled dental restoration device of Claim 37 wherein the implant portion consists of a first material and the crown portion consists of a second material.
39. The pre-assembled dental restoration device of Claim 38 wherein the first material consists of a biocompatible metal.
40. The pre-assembled dental restoration device of Claim 38 wherein the second material consists of a biocompatible ceramic.
41. The pre-assembled dental restoration device of Claim 37 wherein a volume of amount of bone cement and the implant portion of the pre-assembled dental restoration fill the volume of the extraction socket.
42. The pre-assembled dental restoration device of Claim 41 wherein the bone cement consists of fatty acid and calcium carbonate-based composition.
43. The pre-assembled dental restoration device of claim 37 wherein the implant portion includes cement locking structures.
44. The pre-assembled dental restoration device of Claim 37 wherein the implant portion consists of a plurality of concentrically aligned elements each having a middle and a width at the middle wherein the widths are progressively smaller as the implant portion proceeds from a top of the implant portion towards the bottom of the implant portion enabling the implant portion to have a tapering profile corresponding to the shape of the extraction socket.
45. The pre-assembled dental restoration device of Claim 37 wherein the implant portion consists of a plurality of eccentrically aligned elements each having a middle and a width at the middle wherein the widths are progressively smaller as the implant portion proceeds from a top of the implant portion towards the bottom of the implant portion enabling the implant portion to have a tapering profile corresponding to the shape of the extraction socket.
46. The pre-assembled dental restoration device of Claim 37 wherein the implant portion consists of a generally ovoid shaped structure including cement locking structures, the implant portion having a profile and foot print which is smaller than the profile and foot print of the extraction socket.
47. The pre-assembled dental restoration device of claim 46, wherein the cement locking structures include a plurality of skirt shaped sections, wherein the skirt shaped structures are generally aligned along a common axis.
48. The pre-assembled dental restoration device of claim 46, wherein the cement locking structures include a plurality of flanges, wherein the flanges extend at an angle with respect to a longitudinal axis of the implant.
49. The pre-assembled dental restoration device of claim 46, wherein the cement locking structures include extensions or spikes, wherein the extensions extend at an angle with respect to a longitudinal axis of the implant.
50. The pre-assembled dental restoration device of claim 46, wherein the cement locking structures includes ridges, wherein the ridges generally extend at an angle with respect to a longitudinal axis of the implant.
51. A kit for restoring an extracted native tooth having a root and crown and wherein the extraction of the native tooth leaves an extraction socket having a volume, the kit comprising: a) a pre-assembled dental restoration device comprising an implant portion configured to fill a volume less than the volume of the extraction socket; and a crown portion affixed to the implant portion at the point of manufacture of the implant portion and crown portion;
b) a fatty acid and calcium carbonate-based bone cement, wherein the implant portion and a volume of the bone cement fill the volume of the extraction socket.
52. The kit of Claim 51 wherein the implant portion of the pre-assembled dental restoration device consists of a first material and the crown portion of the pre-assembled dental restoration device consists of a second material.
53. The kit of Claim 51 wherein the first material consists of a biocompatible metal.
54. The kit of Claim 51 wherein the second material consists of a biocompatible ceramic, and the bone cement has load bearing characteristics when set.
PCT/US2012/033074 2011-04-11 2012-04-11 Dental implant and crown and method of placing a dental implant and crown in a single visit WO2012142127A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NZ59219611 2011-04-11
NZ592196 2011-04-11
NZ592690 2011-05-05
NZ59269011 2011-05-05

Publications (1)

Publication Number Publication Date
WO2012142127A1 true WO2012142127A1 (en) 2012-10-18

Family

ID=45992864

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2012/033074 WO2012142127A1 (en) 2011-04-11 2012-04-11 Dental implant and crown and method of placing a dental implant and crown in a single visit

Country Status (1)

Country Link
WO (1) WO2012142127A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11589967B2 (en) 2016-07-15 2023-02-28 Cudeti Sagl Implant

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3950850A (en) * 1974-02-25 1976-04-20 Miter, Inc. Dental prosthetic implants
US4199864A (en) * 1975-12-22 1980-04-29 Arthur Ashman Endosseous plastic implant method
JP2006187369A (en) * 2004-12-29 2006-07-20 Shoichi Nose Dental metal crown and dental implant
US20080090207A1 (en) * 2006-10-16 2008-04-17 Ruedger Rubbert Customized dental prosthesis for periodontal- or osseointegration, and related systems and methods
US20090092944A1 (en) * 2005-10-05 2009-04-09 Wolfgang Pirker Tooth Implant
US20110244428A1 (en) * 2010-04-02 2011-10-06 James Henderson Smith Whitney Apparatus, method and system for dental implants
US20110244416A1 (en) * 2010-04-02 2011-10-06 James Henderson Smith Whitney Apparatus, method and system for dental implants
WO2011123638A2 (en) * 2010-04-02 2011-10-06 James Henderson Smith Whitney Apparatus, method and system for dental implants

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3950850A (en) * 1974-02-25 1976-04-20 Miter, Inc. Dental prosthetic implants
US3950850B1 (en) * 1974-02-25 1983-03-22
US4199864A (en) * 1975-12-22 1980-04-29 Arthur Ashman Endosseous plastic implant method
JP2006187369A (en) * 2004-12-29 2006-07-20 Shoichi Nose Dental metal crown and dental implant
US20090092944A1 (en) * 2005-10-05 2009-04-09 Wolfgang Pirker Tooth Implant
US20080090207A1 (en) * 2006-10-16 2008-04-17 Ruedger Rubbert Customized dental prosthesis for periodontal- or osseointegration, and related systems and methods
US20110244428A1 (en) * 2010-04-02 2011-10-06 James Henderson Smith Whitney Apparatus, method and system for dental implants
US20110244416A1 (en) * 2010-04-02 2011-10-06 James Henderson Smith Whitney Apparatus, method and system for dental implants
WO2011123638A2 (en) * 2010-04-02 2011-10-06 James Henderson Smith Whitney Apparatus, method and system for dental implants

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MARIE-LAURE FONTAINE ET AL: "New calcium carbonate-based cements for bone reconstruction", KEY ENGINEERING MATERIALS (VOLUMES 284 - 286), 1 January 2005 (2005-01-01), pages 105 - 108, XP055037012, Retrieved from the Internet <URL:http://oatao.univ-toulouse.fr/568/2/Bonnecarere_568.pdf> [retrieved on 20120903] *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11589967B2 (en) 2016-07-15 2023-02-28 Cudeti Sagl Implant

Similar Documents

Publication Publication Date Title
Santosa Provisional restoration options in implant dentistr
Wheeler et al. Tissue preservation and maintenance of optimum esthetics: a clinical report.
US20150004563A1 (en) Anatomical healing abutments, kits, and methods
Grizas et al. A detailed decision tree to create, preserve, transfer, and support the emergence profile in anterior maxillary implants using custom abutments
Noh et al. Prosthetic rehabilitation of a cleidocranial dysplasia patient with vertical maxillofacial deficiency: a clinical report
Zawta Fixed partial dentures with an all-ceramic system: A case report.
KR20150014932A (en) Oval platform dental implant system and it&#39;s components
Duff et al. Management of a partially edentulous patient with malpositioned implants, using all-ceramic abutments and all-ceramic restorations: A clinical report
RU2568102C1 (en) Method for masticatory efficiency restoration of lower and upper molars with damaged roots
WO2012142127A1 (en) Dental implant and crown and method of placing a dental implant and crown in a single visit
RU124140U1 (en) DENTAL JAW DENTISTRY WITH IMPLANT SUPPORT
Cavallaro et al. Prosthodontic complications related to non-optimal dental implant placement
del Castillo et al. Indexing and provisional restoration of single implants
US20200253697A1 (en) Multi-function dental implant system
Redemagni Immediate postextraction implantation with provisionalization of two primary canines and related impacted permanent canines: a case report.
Calesini et al. The Use of CAD/CAM Cobalt-Chromium Framework to Optimize Subgingival Prosthetic Contours and Improve Esthetics: Anterior Mandibular Case Reports.
WO2013106542A1 (en) Customizable sculptable anatomical healing caps, pontics, systems, and related methods
Rishi et al. Immediate placement and immediate loading of dental implant in mandibular posterior region through precise implant size parameters selection: A case report
RU2693220C1 (en) Method of direct dental implantation
Pisarik et al. Restorative techniques for Bicon short® implants
Priest Soft tissue development with provisional and definitive implant restorations
Bhandari et al. Rehabilitation of severely resorbed maxilla with a hollow maxillary complete denture
Assadawy Immediate Dental Implant Practical Steps at Your Fingertips
Chincholikar et al. Prosthodontic management of malpositioned implants in anterior maxillary region: a case series
Bedeloğlu Immediate Implant Placement In Aesthetic Zone Five Year Follow-Up: A Case Report

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12715796

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12715796

Country of ref document: EP

Kind code of ref document: A1