Patient selectable knee arthroplasty devices

• US 9,186,254 B2
• Filed: 04/07/2014
• Issued: 11/17/2015
• Est. Priority Date: 05/25/2001
• Status: Expired due to Term

• Current Assignee: Conformis Incorporated
• Original Assignee: Conformis Incorporated
• Inventors: Fitz, Wolfgang, Lang, Philipp, Steines, Daniel, Tsougarakis, Konstantinos, Vargas-Voracek, Rene
• Primary Examiner(s): Stewart, Jason-Dennis
• Application Number:
  US14/246,335
• Publication Number:
  US 20140336774A1
• Time in Patent Office: 589 Days
• US Class Current: 1/1
• CPC Class Codes: A61B 5/4504 Bones A61B5/4547 takes precedence
• CPC Class Codes: A61B 5/4514 Cartilage
• CPC Class Codes: A61B 5/4528 Joints A61B5/4533, A61B5/4538 take precedence
• CPC Class Codes: A61F 2/30756 Cartilage endoprostheses A61F2/3603 takes precedence
• CPC Class Codes: A61F 2/3094 Designing or manufacturing processes
• CPC Class Codes: A61F 2/30942 for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
• CPC Class Codes: A61F 2/3859 Femoral components
• CPC Class Codes: A61F 2/3877 Patellae or trochleae
• CPC Class Codes: A61F 2002/30952 using CAD-CAM techniques or NC-techniques
• CPC Class Codes: A61F 2002/30957 using a positive or a negative model, e.g. moulds
• CPC Class Codes: A61F 2002/30962 using stereolithography
• CPC Class Codes: A61F 2002/4635 using minimally invasive surgery
• CPC Class Codes: B33Y 80/00 Products made by additive manufacturing
• CPC Class Codes: G06T 2207/30052 Implant; Prosthesis
• CPC Class Codes: G06T 7/0014 using an image reference approach

Abstract

Disclosed herein are methods and devices for repairing articular surfaces in a knee joint. The articular surface repairs are customizable or highly selectable for each patient and geared toward providing optimal fit and function. Kits are also provided to enable customized repairs to be performed.

Claims

1. An orthopedic implant comprising:

a femoral implant having a non-custom inner bone-engaging surface including one or more planar surfaces configured for engagement with femoral bone cuts prepared for a femoral implant; and

an anterior femoral flange of the orthopedic implant configured to have a patient-specific shape and closely match a corresponding portion of a femur of a specific patient from a three-dimensional digital image of a patient'"'"'s joint using computer modeling.

2. The orthopedic implant of claim 1, wherein the patient-specific shape includes a patient-specific size and/or dimensional measurement.

3. The orthopedic implant of claim 1, wherein the patient-specific shape includes a patient-specific asymmetrical shape.

4. The orthopedic implant of claim 3, wherein the patient-specific asymmetrical shape includes an anterior flange of different medial and lateral heights.

5. The orthopedic implant of claim 3, wherein the patient-specific asymmetrical shape includes different medial and lateral condyle widths.

6. The orthopedic implant of claim 1, wherein the femoral implant includes a medial and/or lateral condyle having patient-specific shape information derived from the three-dimensional digital image of the patient'"'"'s joint.

7. The orthopedic implant of claim 6, wherein the patient-specific shape information includes information regarding a size or dimensional measurement of a corresponding condyle of the patient'"'"'s joint.

8. The orthopedic implant of claim 6, wherein the patient-specific shape information includes information regarding a posterior portion of a corresponding condyle of the patient'"'"'s joint.

9. The orthopedic implant of claim 1, further includes a tibial implant configured to articulate against the femoral implant.

10. The orthopedic implant of claim 1, further includes a patella implant configured to articulate against the femoral implant.

11. An orthopedic implant comprising:

a femoral implant having a non-custom inner bone-engaging surface including one or more planar surfaces configured for engagement with femoral bone cuts prepared for a femoral implant; and

an orientation of a patella track of the orthopedic implant configured to be patient-specific and closely match a corresponding orientation of a patella track of a femur of a specific patient from a three-dimensional digital image of a patient'"'"'s joint using computer modeling.

12. The orthopedic implant of claim 11, wherein the patella track of the orthopedic implant is further configured to match a corresponding shape of the patella track of the femur of the specific patient.

13. The orthopedic implant of claim 12, wherein the corresponding shape of the patellar track of the femur of the specific patient includes a size and/or dimensional measurement of the patellar track of the femur of the specific patient.

14. The orthopedic implant of claim 11, further includes a tibial implant configured to articulate against the femoral implant.

15. The orthopedic implant of claim 11, further includes a patella implant configured to articulate against the femoral implant.

16. An orthopedic implant comprising:

a femoral implant having a non-custom inner bone-engaging surface including one or more planar surfaces configured for engagement with femoral bone cuts prepared for a femoral implant; and

a shape of a patella track of the orthopedic implant configured to be patient-specific and closely match a corresponding shape of a patella track of a femur of a specific patient from a three-dimensional digital image of a patient'"'"'s joint using computer modeling.

17. The orthopedic implant of claim 16, wherein the corresponding shape of the patellar track of the femur of the specific patient includes a size and/or dimensional measurement of the patellar track of the femur of the specific patient.

18. The orthopedic implant of claim 16, wherein the patella track of the orthopedic implant is further configured to match a corresponding orientation of the patella track of the femur of the specific patient.

19. The orthopedic implant of claim 16, further includes a tibial implant configured to articulate against the femoral implant.

20. The orthopedic implant of claim 16, further includes a patella implant configured to articulate against the femoral implant.