Method and system for integrated orthodontic treatment planning using unified workstation

• US 7,717,708 B2
• Filed: 05/02/2003
• Issued: 05/18/2010
• Est. Priority Date: 04/13/2001
• Status: Expired due to Fees

• Current Assignee: Orametrix Incorporated (Astrazeneca PLC)
• Original Assignee: Orametrix Incorporated (Astrazeneca PLC)
• Inventors: Imgrund, Hans, Sporbert, Peer, Strauss, Claudia, Maetzel, Stephan, Badura, Justyna, Johnson, Matthew, Getto, Phillip, Taneja, Sanjeev, Sachdeva, Rohit, Penman, John, De Silva, Danesh
• Primary Examiner(s): Rodriguez; Cris L
• Assistant Examiner(s): Singh; Sunil K
• Application Number:
  US10/428,461
• Publication Number:
  US 20040029068A1
• Time in Patent Office: 2,573 Days
• Field of Search: 433/24, 433/213, 433/214, 433/215, 345/319, 378/168
• US Class Current: 433/24
• CPC Class Codes: A61C 7/00 Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
• CPC Class Codes: A61C 7/002 Orthodontic computer assisted systems
• CPC Class Codes: A61C 9/0046 Data acquisition means or methods
• CPC Class Codes: G16H 20/40 relating to mechanical, radiation or invasive therapies, e.g. surgery, laser therapy, dialysis or acupuncture
• CPC Class Codes: G16H 40/63 for local operation
• CPC Class Codes: G16H 50/50 for simulation or modelling of medical disorders

Abstract

A method and workstation for orthodontic treatment planning of a patient. The workstation is based on a computing platform having a graphical user interface, a processor and a computer storage medium containing digitized records pertaining to a patient including image data (3D image data and/or 2D image data). The workstation further includes a set of software instructions providing graphical user interface tools which the user marks a midline and an aesthetic occlusal plane in a two- or three-dimensional virtual model of the patient, marks an occlusal plane in the virtual model; selects a reference tooth in the virtual model; aligns virtual teeth in the virtual model in a proposed arrangement to treat the patient; manages space between the virtual teeth in the proposed arrangement; and repeats one or more of these steps in an iterative fashion to make any further adjustments in the proposed arrangement. When the adjustments are complete, the user selects or identifies a finalized proposed treatment plan for treating the patient.

Claims

1. A method for orthodontic treatment planning of a patient with a workstation comprising a computing platform having a graphical user interface, a processor and a computer storage medium containing digitized records pertaining to a patient, said digitized records including image data, and a set of software instructions providing graphical user interface tools for access to said digitized records, the method comprising the steps of:

a) developing a treatment strategy for the patient;

b) using the graphical user interface to define a midline and an aesthetic occlusal plane in a two-or three-dimensional image of the patient and providing the user with the ability to move the midline and aesthetic occlusal plane;

c) using the graphical user interface to define an occlusal plane on a two or three-dimensional image of the patient;

d) using the graphical user interface to select a reference tooth;

wherein said reference tooth is a tooth that is to be moved not at all;

e) using the workstation to align two dimensional image data of the patient with a three-dimensional virtual model of teeth of the patient; and

f) using the graphical user interface to i) design a desired arch form and evaluate and manage space in the arch form, and ii) move virtual teeth selectively in a three-dimensional model of the patient from an initial orientation relative to the desired archform so as to arrive at a proposed tooth arrangement for treatment of the patient.

2. The method of claim 1, wherein step a) further comprises the steps of:

collecting information as to the patient'"'"'s complaints and conditions relevant to soft tissue, skeletal, and dental anatomy with respect to vertical, sagittal, and transverse positions for said patient and entering said information into the computer storage medium.

3. The method of claim 1, wherein step b) further comprises the steps of:

marking said midline; and

marking maxilla and mandible levels and cant of said aesthetic occlusal plane.

4. The method of claim 3, wherein the marking of said step b) is performed by manipulation of user interface devices on a two dimensional photograph of said patient displayed on said graphical user interface.

5. The method of claim 1, wherein said step c) further comprises the steps of:

defining an upper occlusal plane for a virtual model of the upper arch of the patient,

defining a lower occlusal plane in a virtual model of a lower arch of the patient;

defining a posterior position of said upper occlusal plane;

defining a functional position of said upper occlusal plane;

defining an aesthetic position of said upper occlusal plane;

defining a posterior position of said lower occlusal plane;

defining a functional position of said lower occlusal plane;

defining an aesthetic position of said lower occlusal plane;

marking the upper and lower occlusal planes and positions thereof.

6. The method of claim 5, wherein said marking the upper and lower occlusal planes and positions thereof is done on a 2 dimensional lateral x-ray image of said patient displayed on said graphical user interface.

7. The method of claim 1, wherein said step e) of aligning further comprises the steps of:

displaying a two-dimensional x-ray image of the patient and superimposing there over scaled virtual three-dimensional teeth on said two-dimensional x-ray image.

8. The method of claim 1, wherein said workstation further comprises a clinical benchmarking knowledge database comprising patient records for a plurality of patients.

9. The method of claim 4, wherein said workstation computer storage medium further stores a three-dimensional virtual model of the patient, and wherein the markings made in step b) are viewable on said user interface as planar surfaces when said user accesses said three-dimensional model.

10. The method of claim 1, wherein step f) is performed with reference to constraints for the patient, and wherein said constraints are identified via user interaction with the user interface and entered into said computer storage medium.

11. The method of claim 10, wherein the workstation displays a three-dimensional virtual model of gingival tissue in conjunction with a virtual model of the teeth.

12. The method of claim 1, further comprising the step of storing the proposed arrangement in step f) and further using the proposed arrangement in additional treatment planning procedures using said workstation.

13. The method of claim 1, wherein said workstation stores a database of “

normal”

measurements for a plurality of biological parameters for patients, and wherein said workstation provides tools by which the user can compare biological parameters for a particular patient for which treatment is being planned with the normal measurements and an variance from said normal measurements are displayed to the user.

14. The method of claim 1, further comprising in step f, managing the spatial relationships between the opposing arches in the three dimensional virtual model of the teeth of the patient.

15. The method of claim 1, further comprising automatically aligning teeth in the three-dimensional virtual model of the teeth of the patient along one of more of the following constraints:

vertical, sagittal, transverse, midline planes and an arch form.

16. The method of claim 15, wherein the automatically aligning is performed independently for the upper and lower arches.

17. The method of claim 15, wherein the automatically aligning is performed in tandem for both the upper and lower arches.

18. The method of claim 15, wherein the automatic alignment is performed by selecting points of reference comprising one or more of contact points, marginal ridges, cusps, fossa.

19. An orthodontic treatment planning workstation comprising a computing platform having a graphical user interface, a processor and a computer storage medium containing digitized records pertaining to a patient, said digitized records including image data, and a set of software instructions providing graphical user interface tools for access to said digitized records, wherein said set of instructions include:

a) instructions providing graphical user interface tools for allowing the user to define a midline and an aesthetic occlusal plane in a two- or three-dimensional image of the patient displayed on the graphical user interface and provide the user with the ability to move the midline and aesthetic occlusal plane;

b) instructions providing graphical user interface tools for allowing the user to define an occlusal plane in said virtual model;

c) instructions providing graphical user interface tools for allowing the user to select a reference tooth in the virtual model;

wherein said reference tooth is a tooth that is to be moved not at all;

d) instructions, either automatic or with user involvement, for aligning two dimensional image data of the patient with a three-dimensional virtual model of teeth of the patient; and

e) instructions allowing the user to use the graphical user interface to design a desired archform and manage space in the arch form and move virtual teeth selectively from an initial configuration relative to the desired archform so as to arrive at a proposed tooth arrangement for treatment of the patient.

20. The workstation of claim 19, wherein instructions a) further comprise:

instructions providing graphical user interface tools for allowing the user to enter information into the computer storage medium as to the patient'"'"'s complaints and conditions relevant to soft tissue, skeletal, and dental anatomy with respect to vertical, sagittal, and transverse positions for said patient.

21. The workstation of claim 19, wherein the instructions a) further comprise instructions for marking said midline and marking maxilla and mandible levels and cant of said aesthetic occlusal plane.

22. The workstation of claim 21, wherein the marking is performed by providing instructions for display of a two dimensional photograph of said patient on said graphical user interface and instructions by which a user may use user interface devices to indicate the location of said markings.

23. The workstation of claim 19, wherein said instructions b) further comprises the instructions for allowing the user to:

mark an upper occlusal plane for a virtual model of the upper arch of the patient,

mark a lower occlusal plane in a virtual model of a lower arch of the patient;

mark a posterior position of said upper occlusal plane;

mark a functional position of said upper occlusal plane;

mark an aesthetic position of said upper occlusal plane;

mark a posterior position of said lower occlusal plane;

mark a functional position of said lower occlusal plane; and

mark an aesthetic position of said lower occlusal plane.

24. The workstation of claim 23, wherein said marking the upper and lower occlusal planes and positions thereof is provided on a 2 dimensional lateral x-ray image of said patient displayed on said graphical user interface.

25. The workstation of claim 19, wherein said instructions d) of aligning teeth further comprises instructions for displaying a two-dimensional image of the patient and superimposing there over scaled virtual three-dimensional teeth on said two-dimensional image.

26. The workstation of claim 19, wherein said workstation further comprises a clinical benchmarking knowledge database comprising patient records for a plurality of patients.

27. The workstation of claim 21, wherein said workstation computer storage medium further stores a three-dimensional model of the patient, and wherein the markings are viewable on said user interface when said user accesses said three-dimensional model.

28. The workstation of claim 19, wherein said workstation instructions d) provide the user to perform the functions with reference to constraints for the patient, and wherein said constraints are identified via user interface interaction with a virtual model of the patient and entered into said computer storage medium.