PATIENT-MODIFIED IMPLANT

• US 20110184526A1
• Filed: 04/07/2011
• Published: 07/28/2011
• Est. Priority Date: 04/17/2007
• Status: Active Grant

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Inventors: White, John R., Metzger, Robert, Berend, Keith R.
• Granted Patent: US 8,486,150 B2
• Time in Patent Office: Days
• US Class Current: 623/20.32
• CPC Class Codes: A61B 17/154 for preparing bone for knee prosthesis
• CPC Class Codes: A61B 17/155 Cutting femur
• CPC Class Codes: A61B 17/157 Cutting tibia
• CPC Class Codes: A61B 17/1742 for the hip
• CPC Class Codes: A61B 17/1764 for the knee
• CPC Class Codes: A61B 17/1778 for the shoulder
• 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: 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 2/38 for elbows or knees
• CPC Class Codes: A61F 2/3836 Special connection between upper and lower leg, e.g. constrained
• CPC Class Codes: A61F 2/3859 Femoral components
• CPC Class Codes: A61F 2/3868 with sliding tibial bearing
• CPC Class Codes: A61F 2/389 Tibial components A61F2/3868 takes precedence
• CPC Class Codes: A61F 2/4684 Trial or dummy prostheses
• CPC Class Codes: A61F 2002/30616 Sets comprising a plurality of prosthetic parts of different sizes or orientations
• CPC Class Codes: A61F 2002/30878 with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
• CPC Class Codes: A61F 2002/30884 Fins or wings, e.g. longitudinal wings for preventing rotation within the bone cavity
• CPC Class Codes: A61F 2002/30892 parallel
• CPC Class Codes: A61F 2002/30948 using computerized tomography, i.e. CT scans
• CPC Class Codes: A61F 2002/30952 : using CAD-CAM techniques or NC-techniques
• CPC Class Codes: A61F 2002/3096 : trimmed or cut to a customised size
• CPC Class Codes: Y10S 623/901 : Method of manufacturing prosthetic device

Abstract

An orthopedic implant includes a first portion including at least one feature modified to be patient-specific and match the anatomy of a specific patient from a three-dimensional digital image of a patient'"'"'s joint using computer modeling. The orthopedic implant includes a non-custom inner bone-engaging surface including a plurality of planar surfaces configured for engagement with non-custom bone cuts.

Claims

1. An orthopedic implant comprising:

a first portion including at least one feature modified to be patient-specific and match the anatomy of a specific patient from a three-dimensional digital image of a patient'"'"'s joint using computer modeling; and

a non-custom inner bone-engaging surface including a plurality of planar surfaces configured for engagement with non-custom bone cuts.

2. The orthopedic implant of claim 1, wherein the inner bone engaging surface with has at least one standardized dimension, wherein the standardized dimension is selected in increments of 3 mm or less.

3. The orthopedic implant of claim 2, wherein the standardized dimension is measured in the anterior-posterior direction.

4. The orthopedic implant of claim 1, wherein the patient-specific feature is a medial lateral width.

5. The orthopedic implant of claim 1, wherein the orthopedic implant is a femoral knee implant and the patient-specific feature is an orientation and a depth of a patella track of the femoral knee implant.

6. The orthopedic implant of claim 1, wherein the orthopedic implant is a femoral knee implant and the patient-specific feature is a shape and a height of an anterior flange of the femoral knee implant.

7. An orthopedic implant comprising:

a non-custom inner bone-engaging surface including a plurality of planar surfaces configured for engagement with standard size femoral bone cuts prepared for a non-custom femoral implant; and

an anterior femoral flange of the orthopedic implant configured during a preoperative plan 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, wherein the patient-specific shape of the anterior femoral flange of the orthopedic implant is obtained by modifying a digital image of the non-custom femoral implant without modifying the plurality of planar surface of the inner bone-engaging surface.

8. An orthopedic implant comprising:

a non-custom inner bone-engaging surface including a plurality of planar surfaces configured for engagement with standard size femoral bone cuts prepared for a non-custom femoral implant; and

an orientation of a patella track of the orthopedic implant configured during a preoperative plan to be patient-specific and closely match a corresponding an 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, wherein the orientation of the patella track of the orthopedic implant is obtained by modifying a digital image of the non-custom femoral implant without modifying the plurality of planar surface of the inner bone-engaging surface.

9. An orthopedic implant comprising:

a non-custom inner bone-engaging surface including a plurality of planar surfaces configured for engagement with standard size femoral bone cuts prepared for a non-custom femoral implant; and

a depth of a patella track of the orthopedic implant configured during a preoperative plan to be patient-specific and closely match a corresponding depth 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, wherein the depth of the patella track of the orthopedic implant is obtained by modifying a digital image of the non-custom femoral implant without modifying the plurality of planar surface of the inner bone-engaging surface.

10. An orthopedic implant comprising:

a non-custom tibial bearing component;

a tibial tray including a non-custom locking mechanism couplable with the non-custom tibial bearing, wherein the tibial tray has a patient-specific profile configured during a preoperative plan to be patient-specific and closely match a corresponding profile of a tibia of a specific patient from a three-dimensional digital image of a patient'"'"'s joint using computer modeling, wherein the patient-specific profile of the tibial tray is obtained by modifying a digital image of a non-custom tibial implant without modifying the non-custom locking mechanism.

11. The orthopedic implant of claim 10, wherein the locking mechanism includes a plurality of recesses on the tibial tray.