IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0930700
(2004-08-30)
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등록번호 |
US-7320592
(2008-01-22)
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발명자
/ 주소 |
- Chishti,Muhammad
- Pavlovskaia,Elena
- Bala,Gregory P.
- Freyburger,Brian M.
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출원인 / 주소 |
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대리인 / 주소 |
Townsend and Townsend and Crew LLP
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인용정보 |
피인용 횟수 :
16 인용 특허 :
132 |
초록
▼
Methods and corresponding apparatus for segmenting an orthodontic treatment path into clinically appropriate substeps for repositioning the teeth of a patient include providing a digital finite element model of the shape and material of each of a sequence of appliances to be applied to a patient; pr
Methods and corresponding apparatus for segmenting an orthodontic treatment path into clinically appropriate substeps for repositioning the teeth of a patient include providing a digital finite element model of the shape and material of each of a sequence of appliances to be applied to a patient; providing a digital finite element model of the teeth and related mouth tissue of the patient; computing the actual effect of the appliances on the teeth by analyzing the finite elements models computationally; and evaluating the effect against clinical constraints. The appliances can be braces, polymeric shells, or other forms of orthodontic appliance.
대표청구항
▼
What is claimed is: 1. A computer-implemented method for designing custom appliances for repositioning the teeth of a patient, comprising: scanning a patient's teeth or a physical model thereof to generate a virtual model; providing a digital model of each of a plurality of candidate appliances to
What is claimed is: 1. A computer-implemented method for designing custom appliances for repositioning the teeth of a patient, comprising: scanning a patient's teeth or a physical model thereof to generate a virtual model; providing a digital model of each of a plurality of candidate appliances to be applied to a virtual model of the teeth, the candidate appliances having cavities shaped to receive and reposition teeth; computing the actual effect of each of the plurality of appliances on repositioning the teeth by performing an analysis on a digital model of the shape and material of each of the plurality of appliances to be applied to the teeth, and a structure of the patient's teeth as set forth in the virtual model; and generating, based at least partially on the computed effect, a sequence of custom appliances having cavities and wherein the cavities of successive custom appliances have different geometries selected to receive and progressively reposition the teeth, wherein the sequence of custom appliances is generated prior to the patient wearing any appliance of the sequence. 2. A computer-implemented method for designing custom appliances for repositioning the teeth of a patient, comprising: scanning a patient's teeth or a physical model thereof to generate a virtual model; providing a digital model of each of a plurality of candidate appliances, the candidate appliances having cavities shaped to receive and reposition teeth; computing the actual effect of each of the plurality of appliances on repositioning the teeth by performing finite element analysis on each of the plurality of appliances as applied to a virtual model of the patient's teeth; and generating, based at least partially on the computed effect, a sequence of custom appliances having cavities and wherein the cavities of successive custom appliances have different geometries selected to receive and progressively reposition the teeth, wherein the sequence of custom appliances is generated prior to the patient wearing any appliance of the sequence. 3. A computer-implemented method for generating one or more appliances for repositioning the teeth of a patient, comprising: scanning a patient's teeth or a physical model thereof; providing a digital model of the shape and material of each of a plurality of candidate appliances to be applied to the teeth, the candidate appliances having cavities shaped to receive and reposition teeth; providing a digital model of the teeth and related mouth tissue of the patient using data obtained by said scanning; computing the actual effect of each of the plurality of appliances on repositioning the teeth by performing finite element analysis on said models; evaluating the effect against clinical constraints; and generating, based at least partially on the evaluated effect, a sequence of appliances having cavities and wherein the cavities of successive custom appliances have different geometries selected to receive and progressively reposition the teeth, wherein the sequence of custom appliances is generated prior to the patient wearing any appliance of the sequence. 4. The method of any one of claims 1 to 3, wherein the sequence of appliances includes a sequence of polymeric shells manufactured by fitting polymeric sheets over positive models corresponding to the teeth of the patient. 5. The method of any one of claims 1 to 3, wherein the sequence of appliances includes a sequence of polymeric shells manufactured by stereo lithography from digital models. 6. The method of any one of claims 1 to 3, further comprising: comparing the actual effect of the candidate appliances with an intended effect of the candidate appliances; and identifying a candidate appliance as an unsatisfactory appliance if the actual effect of the appliance is more than a threshold different from the intended effect of the appliance and modifying a model of the unsatisfactory appliance according to the results of the comparison. 7. The method of claim 6, wherein the model of the unsatisfactory appliance is modified by modifying the shape of the unsatisfactory appliance. 8. The method of claim 7, wherein the shape of the unsatisfactory appliance is modified by adding a dimple. 9. The method of claim 7, wherein the shape of the unsatisfactory appliance is modified by adding material to cause an overcorrection of tooth position. 10. The method of claim 7, wherein the shape of the unsatisfactory appliance is modified by adding a ridge of material to increase stiffness. 11. The method of claim 7, wherein the shape of the unsatisfactory appliance is modified by adding a rim of material along a gumline to increase stiffness. 12. The method of claim 7, wherein the shape of the unsatisfactory appliance is modified by removing material to reduce stiffness. 13. The method of claim 6, wherein the unsatisfactory appliance is redefined to have a shape defined by the complement of the difference between the intended effect and the actual effect of the unsatisfactory appliance. 14. The method of claim 3, wherein the clinical constraint is selected from the group consisting of a maximum rate of displacement of a tooth, a maximum force on a tooth, and a desired end position of a tooth. 15. The method of claim 14, wherein the clinical constraint comprises a maximum rate of linear displacement of a tooth. 16. The method of claim 14, wherein the clinical constraint comprises a maximum rate of rotational displacement of a tooth. 17. The method of claim 14, wherein the clinical constraint comprises a linear force or a maximum torsional force. 18. The method of any of claims 1 to 3, wherein the last of the sequence of appliances is a positioner for finishing and maintaining teeth positions. 19. A computer program product, tangibly stored on a computer-readable medium, comprising instructions operable to cause a computer to: provide a digital model of the shape and material of each of a plurality of candidate appliances to be applied to the teeth of the patient, the candidate appliances having cavities shaped to receive and reposition teeth; provide a digital model of the teeth and related mouth tissue of the patient using data obtained by scanning the patient's teeth; compute the actual effect of each of the plurality of candidate appliances on repositioning the teeth by performing finite element analysis on said models; evaluate the effect against clinical constraints; and generate, based at least partially on the evaluated effect, a sequence of appliances having geometries selected to progressively reposition the teeth, wherein the appliances comprise polymeric shells having cavities and wherein the cavities of successive shells have different geometries shaped to receive and resiliently reposition teeth from one arrangement to a successive arrangement, wherein the sequence of custom appliances is generated prior to the patient wearing any appliance of the sequence. 20. The product of claim 19, wherein the sequence of appliances includes a sequence of polymeric shells manufactured by fitting polymeric sheets over positive models corresponding to the teeth of the patient. 21. The product of claim 19, wherein the sequence of appliances includes a sequence of polymeric shells manufactured by stereo lithography from digital models. 22. The product of claim 21, further comprising instructions to: compare the actual effect of the candidate appliances with an intended effect of the candidate appliances; and identify a candidate appliance as an unsatisfactory appliance if the actual effect of the appliance is more than a threshold different from the intended effect of the appliance and modify a model of the unsatisfactory appliance according to the results of the comparison. 23. The product of claim 22, wherein the model of the unsatisfactory appliance is modified by modifying the shape of the unsatisfactory appliance. 24. The product of claim 23, wherein the shape of the unsatisfactory appliance is modified by adding a dimple. 25. The product of claim 23, wherein the shape of the unsatisfactory appliance is modified by adding material to cause an overcorrection of tooth position. 26. The product of claim 23, wherein the shape of the unsatisfactory appliance is modified by adding a ridge of material to increase stiffness. 27. The product of claim 23, wherein the shape of the unsatisfactory appliance is modified by adding a rim of material along a gumline to increase stiffness. 28. The product of claim 23, wherein the shape of the unsatisfactory appliance is modified by removing material to reduce stiffness. 29. The product of claim 22, wherein the model of the unsatisfactory appliance is redefined to have a shape defined by the complement of the difference between the intended effect and the actual effect of the unsatisfactory appliance. 30. The product of claim 19, wherein the clinical constraints include a maximum rate of displacement of a tooth, a maximum force on a tooth, and a desired end position of a tooth. 31. The product of claim 30, wherein the maximum force is a linear force or a torsional force. 32. The product of claim 30, wherein the maximum rate of displacement is a linear or a angular rate of displacement. 33. The product of claim 19, wherein the clinical constraints include a maximum rate of displacement of a tooth. 34. The product of claim 19, wherein the clinical constraints include a maximum rate of linear displacement of a tooth. 35. The product of claim 19, wherein the clinical constraints include a maximum rate of rotational displacement of a tooth. 36. A system for segmenting an orthodontic treatment path into clinically appropriate substeps for repositioning the teeth of a patient, comprising: means for scanning a patient's teeth or a physical model thereof means for providing a digital model of the shape and material of each of a plurality of candidate appliances to be applied to the patient, the candidate appliances having cavities shaped to receive and reposition teeth; means for providing a digital model of the teeth and related mouth tissue of the patient to use data obtained by said scanning means; means for computing the actual effect of the candidate appliances on repositioning the teeth by performing finite element analysis on said models; means for evaluating the effect against clinical constraints; and means for generating, based at least partially on the evaluated effect, a sequence of appliances having geometries selected to progressively reposition the teeth, wherein the appliances comprise polymeric shells having cavities and wherein the cavities of successive shells have different geometries shaped to receive and resiliently reposition teeth from one arrangement to a successive arrangement, wherein the sequence of appliances is generated prior to the patient wearing any appliance of the sequence. 37. The system of claim 36, further comprising: means for comparing the actual effect of the appliances with an intended effect of the appliances; and means for identifying an appliance as an unsatisfactory appliance if the actual effect of the appliance is more than a threshold different from the intended effect of the appliance and modifying a model of the unsatisfactory appliance according to the results of the comparison.
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