Patient-modified implant and associated method

• US 7,967,868 B2
• Filed: 04/16/2008
• Issued: 06/28/2011
• 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., Berend, Keith R., Metzger, Robert
• Primary Examiner(s): McDermott; Corrine M
• Assistant Examiner(s): WOLF, MEGAN YARNALL
• Application Number:
  US12/103,834
• Publication Number:
  US 20080262624A1
• Time in Patent Office: 1,168 Days
• Field of Search: 623/16.11, 623/18.11, 623/20.14, 623 2018- 202, 623/20.35, 623/23.47, 623/901
• US Class Current: 623/20.35
• 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. The implant has a first portion including at least one patient-adjustable feature, and a second portion including at least one standard feature.

Claims

1. An orthopedic implant manufacturing method comprising:

preparing a three-dimensional digital image of a patient'"'"'s joint using computer modeling;

creating a digital image of a non patient-specific femoral implant selected to closely match a size of the patient'"'"'s joint, the implant having an inner bone engaging surface including a plurality of planar surfaces for engagement with corresponding standard size non-patient specific bone cuts;

overlaying the digital image of the implant on the image of the patient'"'"'s joint;

modifying a shape of an anterior flange of the digital image of the femoral implant to be patient-matched and closely match a corresponding feature of the three-dimensional image of the patient'"'"'s joint without modifying the planar surfaces of the inner bone engaging surface; and

manufacturing a patient-matched implant from the digital image of the femoral implant as modified.

2. An orthopedic implant manufacturing method comprising:

preparing a three-dimensional digital image of a patient'"'"'s joint using computer modeling;

creating a digital image of a non patient-specific femoral implant selected to closely match a size of the patient'"'"'s joint, the implant having an inner bone engaging surface including a plurality of planar surfaces for engagement with corresponding standard size non-patient specific bone cuts;

overlaying the digital image of the implant on the image of the patient'"'"'s joint;

modifying an orientation of a patella track of the digital image of the femoral implant to be patient-matched and closely match a corresponding feature of the three-dimensional image of the patient'"'"'s joint without modifying the planar surfaces of the inner bone engaging surface; and

manufacturing a patient-matched femoral implant from the digital image of the femoral implant as modified.

3. An orthopedic implant manufacturing method comprising:

preparing a three-dimensional digital image of a patient'"'"'s joint using computer modeling;

creating a digital image of a non patient-specific femoral implant selected to closely match a size of the patient'"'"'s joint, the femoral implant having an inner bone engaging surface including a plurality of planar surfaces for engagement with corresponding standard size non-patient specific bone cuts;

overlaying the digital image of the implant on the image of the patient'"'"'s joint;

modifying a depth of a patella track of the digital image of the femoral implant to be patient-matched and closely match a corresponding feature of the three-dimensional image of the patient'"'"'s joint without modifying the planar surfaces of the inner bone engaging surface; and

manufacturing a patient-matched femoral implant from the digital image of the femoral implant as modified.

4. The method of claim 3, further comprising manufacturing a patient-specific alignment guide for the joint based on the three-dimensional image of the patient'"'"'s joint.