Modular system for customized orthodontic appliances

• US 7,811,087 B2
• Filed: 05/12/2004
• Issued: 10/12/2010
• Est. Priority Date: 02/13/2002
• Status: Expired due to Term

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Weise, Thomas, Wiechmann, Dirk, Paehl, Ralf, Rubbert, Rudger
• Primary Examiner(s): Lewis; Ralph A
• Application Number:
  US10/843,897
• Publication Number:
  US 20050158686A1
• Time in Patent Office: 2,344 Days
• Field of Search: 433/8, 433/9
• US Class Current: 433/9
• CPC Class Codes: A61C 7/002 Orthodontic computer assisted systems
• CPC Class Codes: A61C 7/141 Brackets with reinforcing structure, e.g. inserts
• CPC Class Codes: A61C 7/145 Lingual brackets
• CPC Class Codes: A61C 7/148 with occlusal or gingival archwire slot opening A61C7/145 takes precedence
• CPC Class Codes: A61C 7/16 specially adapted to be cemented to teeth
• CPC Class Codes: A61C 7/20 Arch wires A61C7/28 takes precedence
• CPC Class Codes: B33Y 50/00 Data acquisition or data processing for additive manufacturing
• CPC Class Codes: B33Y 80/00 Products made by additive manufacturing

Abstract

A set of customized orthodontic brackets are provided with slots that are arranged substantially parallel to the tooth surface. The archwire, in an as-manufactured condition, has a portion of substantial arcuate extent, which is canted relative to the occlusal plane. The brackets are designed on a computer as a combination of three-dimensional virtual objects comprising the virtual bracket bonding pad and a separate virtual bracket body retrieved from a library of virtual bracket bodies. The virtual brackets can be represented as a file containing digital shape data and exported to a rapid prototype fabrication device for fabrication of the bracket in wax or other material and casting the wax prototype in a suitable alloy. Other manufacturing techniques are also contemplated, including milling and laser sintering.

Claims

1. A set of at least three custom lingual orthodontic brackets for a corresponding at least three pre-identified different functional teeth of a specific pre-identified patient each having different shaped lingual facing tooth surfaces therebetween and each pre-identified to separately receive one of the set of at least three custom lingual orthodontic brackets, each separate one of the at least three custom lingual orthodontic brackets of the set separately comprising:

a bracket bonding surface to directly bond the respective bracket to a specific pre-identified portion of an extent of a lingual facing tooth surface of a respective pre-identified tooth of the specific pre-identified patient defining a complementary bracket receiving tooth surface, an entire extent of the bracket bonding surface of the respective bracket having a three-dimensional surface shape forming a negative of a three-dimensional surface shape of an entire extent of the complementary bracket receiving tooth surface prior to being mounted thereto, the extent of the bracket bonding surface having a surface area dimensioned to be sufficiently large to cover at least 50 percent of the extent of the lingual facing tooth surface of the pre-identified tooth when mounted to the complementary bracket receiving tooth surface of the respective pre-identified tooth and further dimensioned to be sufficiently small so as to provide spacing between an outer parameter edge of the bracket bonding surface of the respective bracket when mounted to the complementary bracket receiving tooth surface of the respective pre-identified tooth and an adjacent outer parameter edge of the bracket bonding surface of each adjacent bracket when mounted on the respective complementary bracket receiving tooth surface of the respective adjacent tooth; and

a bracket body connected to the bracket bonding surface and including an archwire receiving slot positioned to receive an archwire, the archwire receiving slot having a first and a second opposed sidewall, a slot base, and a slot opening opposite the slot base, the archwire receiving slot positioned so that a plane extending between a center of the slot base and a center of the slot opening is substantially parallel to a surface plane of the first opposed sidewall and a surface plane of the second opposed sidewall and substantially parallel to both a surface plane of a major extent of a directly adjacent portion of the complementary bracket receiving tooth surface and a surface plane of an extent of a corresponding portion of the bracket bonding surface located between the archwire receiving slot and the major extent of the directly adjacent portion of the complementary bracket receiving tooth surface and intersects a surface plane of a major extent of a portion of the complementary bracket receiving tooth surface offset from the directly adjacent portion defining an offset portion thereof and a surface plane of an extent of a corresponding portion of the bonding surface complementary with the offset portion when the respective bracket is mounted to the complementary bracket receiving tooth surface of the respective pre-identified tooth, the archwire receiving slot further positioned so that the plane extending between the center of the slot base and the center of the slot opening intersects an occlusal plane of a pre-identified jawbone of the pre-identified patient carrying the at least three pre-identified different functional teeth at an angle substantially less than 90° and

substantially greater than 0°

relative to the occlusal plane when the respective bracket is mounted to the complementary bracket receiving tooth surface of the respective pre-identified tooth and when the pre-identified tooth is in a finished position, to reduce overall bracket body thickness to thereby decrease tongue irritation, decrease articulation impediment, decrease incidence of bracket loss, increase positioning control for finishing, and increase patient comfort.

2. A set as defined in claim 1, wherein the three-dimensional surface shape and surface area of the bracket bonding surface are so dimensioned to provide for a unique positioning of the bracket bonding surface on the complementary bracket receiving tooth surface so that the respective bracket is mountable to the respective pre-identified tooth without use of a separate bracket placement tool.

3. A set as defined in claim 2, wherein the separate bracket placement tool is selected from a group of mechanical tools comprising:

a bracket placement jig, a bracket placement tray, and a bracket placement fixture.

4. A set as defined in claim 1, wherein the bracket bonding surface to directly bond the respective bracket to a specific pre-identified portion of an extent of a lingual facing tooth surface of a respective pre-identified tooth is a lingual tooth surface-facing bonding surface, and wherein at least one of the brackets of the set of brackets is further dimensioned to have a tooth-facing cusp bonding surface to extend over an associated portion of a cusp of the respective pre-identified tooth of the pre-identified patient to thereby aid in manual bracket alignment, the tooth-facing cusp bonding surface being integral with the lingual tooth surface-facing bonding surface and having a three-dimensional surface shape forming a negative of a three-dimensional surface shape of the associated portion of the cusp of the respective pre-identified tooth.

5. A set as defined in claim 1, wherein the surface area of the extent of the bracket bonding surface of the respective bracket is sufficiently small so that the bracket bonding surface does not extend into any adjacent embrasures located between the respective pre-identified tooth and any adjacent teeth.

6. A set as defined in claim 1,

wherein the set of at least three brackets includes a fourth bracket to be positioned on a pre-identified molar in the pre-identified jawbone of the pre-identified patient;

wherein the archwire receiving slot of the fourth bracket comprises a recess including an open end portion, a closed end portion, and a pair of inner peripheral wall boundaries extending therebetween; and

wherein the inner peripheral wall boundaries of the archwire receiving slot of the fourth bracket are positioned so that a respective surface plane of each of the inner peripheral wall boundaries is approximately parallel to the occlusal plane of the pre-identified jawbone of the specific pre-identified patient when the pre-identified molar is in a finished position.

7. A set as defined in claim 1,

wherein the set of at least three brackets includes a fourth bracket to be positioned on a pre-identified molar in the pre-identified jawbone of the pre-identified patient,

wherein the archwire receiving slot of the fourth bracket comprises a recess including an open end portion, a closed end portion, and a pair of inner peripheral wall boundaries extending therebetween, and

wherein the inner peripheral wall boundaries of the archwire receiving slot of the fourth bracket are positioned so that a respective surface plane of each of the inner peripheral wall boundaries is approximately perpendicular to the occlusal plane of the pre-identified jawbone of the specific pre-identified patient when the pre-identified molar is in a finished position.

8. A set as defined in claim 1,

wherein for each bracket, a substantial portion of the bracket including the bracket bonding surface comprises a metallic material;

wherein the extent of the bracket bonding surface of each bracket is substantially larger than an extent of the bracket body; and

wherein the bracket bonding surface of each bracket comprises a bracket bonding pad having a thickness between approximately 0.1 mm and approximately 0.3 mm.

9. A set of at least three custom lingual orthodontic brackets for a corresponding at least three pre-identified different functional teeth of a specific pre-identified patient each having different shaped lingual facing tooth surfaces therebetween and each pre-identified to separately receive one of the set of at least three custom lingual orthodontic brackets, each separate one of the at least three custom lingual orthodontic brackets of the set separately comprising:

means for manually mounting the respective bracket by hand to a specific pre-identified portion of an extent of a lingual facing tooth surface of a respective pre-identified tooth of a specific pre-identified patient defining a complementary bracket receiving tooth surface, comprising a bracket bonding surface to directly bond the respective bracket to the complementary bracket receiving tooth surface, an entire extent of the bracket bonding surface having a three-dimensional surface shape forming a negative of a three-dimensional surface shape of an entire extent of the complementary bracket receiving tooth surface prior to being mounted thereto and having a surface area being both sufficiently large to facilitate the manual mounting of the respective bracket to the complementary bracket receiving tooth surface and sufficiently small so as to provide spacing between an outer parameter edge of the bracket bonding surface of the respective bracket when mounted to the complementary bracket receiving tooth surface of the respective pre-identified tooth and an adjacent outer parameter edge of the bracket bonding surface of each adjacent bracket when mounted on the respective complementary bracket receiving tooth surface of the respective adjacent tooth; and

means for receiving an archwire connected to the means for manually mounting the respective bracket by hand, comprising an archwire receiving slot positioned to receive an archwire, the archwire receiving slot having a first and a second opposed sidewall, a slot base, and a slot opening opposite the slot base, the archwire receiving slot positioned so that a plane extending between a center of the slot base and a center of the slot opening is substantially parallel to a surface plane of the first opposed sidewall and a surface plane of the second opposed sidewall and substantially parallel to both a surface plane of a major extent of a directly adjacent portion of the complementary bracket receiving tooth surface and a surface plane of an extent of a corresponding portion of the bracket bonding surface located between the archwire receiving slot and the major extent of the directly adjacent portion of the complementary bracket receiving tooth surface and intersects a surface plane of a major extent of a portion of the complementary bracket receiving tooth surface offset from the directly adjacent portion thereof defining an offset portion and a surface plane of an extent of a corresponding portion of the bonding surface complementary with the offset portion when the respective bracket is mounted to the complementary bracket receiving tooth surface on the respective pre-identified tooth, the archwire receiving slot further positioned so that the plane extending between the center of the slot base and the center of the slot opening intersects an occlusal plane of a pre-identified jawbone of the pre-identified patient carrying the at least three pre-identified different functional teeth at an oblique angle relative to the occlusal plane when the respective bracket is mounted to the complementary bracket receiving tooth surface of the respective pre-identified tooth and when the pre-identified tooth is in a finished position, to thereby reduce overall bracket body thickness.

10. A set as defined in claim 9, wherein the surface area of the entire extent of the bracket bonding surface of the respective bracket is further dimensioned to cover at least 50 percent of the extent of the lingual facing tooth surface of the pre-identified tooth when the bracket bonding surface of the respective bracket is mounted to the complementary bracket receiving tooth surface of the respective pre-identified tooth.

11. A set as defined in claim 9, wherein the three-dimensional surface shape and surface area of the bracket bonding surface are so dimensioned to provide for a unique positioning of the bracket bonding surface on the complementary bracket receiving tooth surface so that the respective bracket is mountable to the respective pre-identified tooth without use of a separate bracket placement tool.

12. A bracket as defined in claim 11, wherein the separate bracket placement tool is selected from a group of mechanical tools comprising:

a bracket placement jig, a bracket placement tray, and a bracket placement fixture.

13. A set as defined in claim 9, wherein the bracket bonding surface to directly bond the respective bracket to a specific pre-identified portion of an extent of a lingual facing tooth surface of a respective pre-identified tooth is a lingual tooth surface-facing bonding surface, and wherein at least one of the brackets of the set of brackets is further dimensioned to have a tooth-facing cusp bonding surface to extend over an associated portion of a cusp of the respective pre-identified tooth of the pre-identified patient to thereby aid in manual bracket alignment, the tooth-facing cusp bonding surface being integral with the lingual tooth surface-facing bonding surface and having a three-dimensional surface shape forming a negative of a three-dimensional surface shape of the associated portion of the cusp of the respective pre-identified tooth.

14. A set as defined in claim 9, wherein the surface area of the extent of the bracket bonding surface of the respective bracket is further sufficiently small so that the bracket bonding surface does not extend into any adjacent embrasures located between the respective pre-identified tooth and any adjacent teeth.

15. A set as defined in claim 9,

wherein the set of at least three brackets includes a fourth bracket to be positioned on a pre-identified molar in the pre-identified jawbone of the pre-identified patient;

wherein the archwire receiving slot of the fourth bracket comprises a recess including an open end portion, a closed end portion, and a pair of inner peripheral wall boundaries extending therebetween; and

wherein the inner peripheral wall boundaries of the archwire receiving slot of the fourth bracket are positioned so that a respective surface plane of each of the inner peripheral wall boundaries is approximately parallel to the occlusal plane of the pre-identified jawbone of the specific pre-identified patient when the pre-identified molar is in a finished position.

16. A set as defined in claim 9,

wherein the set of at least three brackets includes a fourth bracket to be positioned on a pre-identified molar in the pre-identified jawbone of the pre-identified patient,

wherein the archwire receiving slot of the fourth bracket comprises a recess including an open end portion, a closed end portion, and a pair of inner peripheral wall boundaries extending therebetween, and

wherein the inner peripheral wall boundaries of the archwire receiving slot of the fourth bracket are positioned so that a respective surface plane of each of the inner peripheral wall boundaries is approximately perpendicular to the occlusal plane of the pre-identified jawbone of the specific pre-identified patient when the pre-identified molar is in a finished position.

17. A custom lingual orthodontic bracket for a specific pre-identified patient pre-identified to receive the lingual orthodontic bracket, the bracket comprising:

a bracket bonding pad having a bracket bonding surface to directly bond the bracket to a specific pre-identified portion of an extent of a lingual facing tooth surface of a pre-identified tooth of a specific pre-identified patient defining a complementary bracket receiving tooth surface and a non-tooth facing surface comprising a surface positioned opposite the bracket bonding surface to define an opposite surface, an entire extent of the bracket bonding surface having a three-dimensional surface shape forming a negative of a three-dimensional surface shape of an entire extent of the complementary bracket receiving tooth surface prior to being mounted thereto and having a surface area being both sufficiently large to facilitate the manual mounting of the bracket to the complementary bracket receiving tooth surface and sufficiently small so as to provide spacing between an outer parameter edge of the bracket bonding pad of the bracket when mounted to the complementary bracket receiving tooth surface of the pre-identified tooth and an adjacent outer parameter edge of a bracket bonding pad of each adjacent bracket when mounted on a respective complementary bracket receiving tooth surface of each respective adjacent tooth; and

an archwire receiving slot having a first opposed sidewall being formed by an adjacent portion of the non-tooth facing surface of the bracket bonding pad, a second opposed sidewall, a slot base extending between the first and the second opposed sidewalls and connected to the non-tooth facing surface of the bracket bonding pad, and a slot opening opposite the slot base, the archwire receiving slot positioned so that a plane extending between a center of the slot base and a center of the slot opening is substantially parallel to a surface plane of the first opposed sidewall and a surface plane of the second opposed sidewall and substantially parallel to both a surface plane of a major extent of a directly adjacent portion of the complementary bracket receiving tooth surface and a surface plane of an extent of a corresponding portion of the bracket bonding surface of the bracket bonding pad located between the first opposed sidewall and the major extent of the directly adjacent portion of the complementary bracket receiving tooth surface and intersects a surface plane of a major extent of a portion of the complementary bracket receiving tooth surface offset from the directly adjacent portion defining an offset portion and a surface plane of an extent of a corresponding portion of the bonding surface complementary with the offset portion when the bracket is mounted to the complementary bracket receiving tooth surface on the pre-identified tooth, the archwire receiving slot further positioned so that the plane extending between the center of the slot base in the center of the slot opening intersects an occlusal plane of a pre-identified jawbone of the pre-identified patient carrying the pre-identified tooth when the bracket is mounted to the complementary bracket receiving tooth surface of the pre-identified tooth and when the pre-identified tooth is in a finished position, to thereby reduce overall bracket body thickness, a combination of the slot base and the second opposed sidewall having a substantially L-shape when viewed from a lateral side of the bracket.

18. A bracket as defined in claim 17, wherein the surface area of the entire extent of the bracket bonding surface of the bracket is further dimensioned to cover at least 50 percent of the extent of the lingual facing tooth surface of the pre-identified tooth when the bracket bonding surface of the bracket is mounted to the complementary bracket receiving tooth surface of the pre-identified tooth.

19. A bracket as defined in claim 17, wherein the three-dimensional surface shape and surface area of the bracket bonding surface are so dimensioned to provide for a unique positioning of the bracket bonding surface on the complementary bracket receiving tooth surface so that the bracket is mountable to the pre-identified tooth without use of a separate bracket placement tool.

20. A bracket as defined in claim 19, wherein the separate bracket placement tool is selected from a group of mechanical tools comprising:

a bracket placement jig, a bracket placement tray, and a bracket placement fixture.

21. A bracket as defined in claim 17, wherein the bracket bonding surface is a lingual tooth surface-facing bonding surface, and wherein the bracket bonding pad is further dimensioned to have a tooth-facing cusp bonding surface to extend over an associated portion of a cusp of the pre-identified tooth of the pre-identified patient to thereby aid in manual bracket alignment, the tooth-facing cusp bonding surface being integral with the lingual tooth surface-facing bonding surface and having a three-dimensional surface shape forming a negative of a three-dimensional surface shape of the associated portion of the cusp.

22. A set as defined in claim 17, wherein the surface area of the extent of the bracket bonding surface of the bracket is further sufficiently small so that the bracket bonding surface does not extend into any adjacent embrasures located between the pre-identified tooth and any adjacent teeth.