Method for selecting implant components

• US 20080286722A1
• Filed: 05/05/2008
• Published: 11/20/2008
• Est. Priority Date: 05/18/2007
• Status: Active Grant

• Current Assignee: Biomet 3i LLC (Zimvie Incorporated)
• Original Assignee: Biomet 3i LLC (Zimvie Incorporated)
• Inventors: Suttin, Zachary B., Berckmans, Bruce III, Robb, T. Tait
• Granted Patent: US 8,206,153 B2
• Time in Patent Office: Days
• US Class Current: 433/215
• CPC Class Codes: A61B 2034/105 Modelling of the patient, e.g. for ligaments or bones
• CPC Class Codes: A61B 2034/108 Computer aided selection or customisation of medical implants or cutting guides
• CPC Class Codes: A61B 34/10 Computer-aided planning, simulation or modelling of surgical operations
• CPC Class Codes: A61B 6/032 Transmission computed tomography [CT]
• CPC Class Codes: A61B 6/505 for diagnosis of bone
• CPC Class Codes: A61B 6/51 for dentistry
• CPC Class Codes: A61C 13/0004 Computer-assisted sizing or machining of dental prostheses
• CPC Class Codes: A61C 8/00 Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools fastening of peg-teeth in the mouth A61C13/30
• CPC Class Codes: A61C 8/009 for selecting the right implanting element, e.g. templates
• CPC Class Codes: G16H 20/40 relating to mechanical, radiation or invasive therapies, e.g. surgery, laser therapy, dialysis or acupuncture

Abstract

Methods of selecting or designing an implant to be used in a patient are provided. A CT scan of a patient'"'"'s mouth is performed. A 3D CAD model of the patient'"'"'s mouth is created utilizing data generated by the CT scan. Properties of the patient'"'"'s mouth are determined based upon CT scan data and assigned to the 3D CAD model. A desired location for an implant is selected. A FEA simulation is performed on the 3D CAD model to choose an implant or to design an implant that optimizes a selected variable.

Claims

1. A method of selecting an implant to be used in a patient comprising the acts of:

performing a CT scan of the patient'"'"'s mouth;

creating a 3D CAD model of the patient'"'"'s mouth utilizing data generated by the CT scan;

determining properties of the patient'"'"'s mouth based upon data generated by the CT scan;

assigning the determined properties of the patient'"'"'s mouth to the 3D CAD model;

selecting a desired location for the implant;

selecting the implant to be placed into the patient;

performing an FEA simulation of the selected implant being installed in the patient'"'"'s mouth with the 3D CAD model; and

confirming the implant chosen by the act of selecting is clinically appropriate based upon the results of the FEA simulation of the 3D CAD model.

2. The method of claim 1, wherein the act of determining properties determines a type of bone present in the patient'"'"'s jaw.

3. The method of claim 1, wherein the act of determining properties determines a magnitude of bone density of the patient'"'"'s jaw.

4. The method of claim 1, wherein the act of selecting the implant selects a 3D CAD model of the implant from a CAD library and adds the implant to the 3D CAD model at the desired location.

5. The method of claim 1, wherein the act of performing an FEA simulation is a real-time simulation of placing the implant into the patient'"'"'s bone.

6. The method of claim 1, wherein the act of confirming is based upon optimizing initial implant stability while utilizing a given torque level to seat the implant in the bone.

7. The method of claim 1, wherein the act of confirming is based upon verifying that a maximum stress level is not surpassed in the bone surrounding the implant.

8. A method of selecting an implant to be used in a patient comprising the acts of:

performing a CT scan of the patient'"'"'s mouth;

creating a 3D CAD model of the patient'"'"'s mouth utilizing data generated by the CT scan;

determining properties of the patient'"'"'s mouth based upon data generated by the CT scan;

assigning the determined properties of the patient'"'"'s mouth to the 3D CAD model;

selecting a desired location for the implant;

assigning at least one variable to be optimized by a FEA simulation;

performing an FEA simulation on the 3D CAD model to optimize the assigned variable; and

choosing the implant from a plurality of implants to use in the patient based upon results from the act of performing the FEA simulation.

9. The method of claim 8, wherein the act of determining properties determines a type of bone present in the patient'"'"'s jaw.

10. The method of claim 8, wherein the act of determining properties determines a magnitude of bone density of the patient'"'"'s jaw.

11. The method of claim 8, wherein the act of performing an FEA simulation is a real-time simulation of placing the implant into the patient'"'"'s bone.

12. The method of claim 8, wherein the act of assigning the at least one variable to optimize assigns initial implant stability relative to a given torque level to seat the implant in the bone as the variable to optimize.

13. The method of claim 8, wherein the act of assigning the at least one variable to optimize assigns a maximum stress level not to be surpassed in the bone surrounding the implant.

14. The method of claim 8, wherein the act of performing an FEA simulation occurs on a plurality of possible implants contained in a library of the 3D CAD system to optimize the assigned variable.

15. A method of designing an implant to be used in a patient comprising the acts of:

performing a CT scan of the patient'"'"'s mouth;

creating a 3D CAD model of the patient'"'"'s mouth utilizing data generated by the CT scan;

determining properties of the patient'"'"'s mouth based upon data generated by the CT scan;

assigning the determined properties of the patient'"'"'s mouth to the 3D CAD model;

selecting a desired location for the implant;

assigning at least one variable to be optimized by a FEA simulation;

performing a FEA simulation on the 3D CAD model to optimize the assigned variable; and

designing the implant to use in the patient based upon results from the act of performing the FEA simulation.

16. The method of claim 15, wherein the act of determining properties determines a type of bone present in the patient'"'"'s jaw.

17. The method of claim 15, wherein the act of determining properties determines a magnitude of bone density of the patient'"'"'s jaw.

18. The method of claim 15, wherein the act of performing an FEA simulation is a real-time simulation of placing the implant into the patient'"'"'s bone.

19. The method of claim 15, wherein the act of designing the implant includes determining at least one implant dimension from the FEA simulation performed.

20. The method of claim 19, wherein the implant dimension determined is the implant diameter, implant length, or implant thread type.