Patient-modified implant

• US 8,979,936 B2
• Filed: 06/21/2013
• Issued: 03/17/2015
• Est. Priority Date: 06/09/2006
• 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.
• Primary Examiner(s): STEWART, JASON-DENNIS NEILKEN
• Application Number:
  US13/923,827
• Publication Number:
  US 20130282132A1
• Time in Patent Office: 634 Days
• Field of Search: 623/16.11, 623/18.11, 623 2014- 2016, 623/20.35
• 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 tibial bearing including a non-custom portion; and

a tibial tray including a non-custom locking mechanism configured to be coupled with the non-custom portion of the tibial bearing, wherein the tibial tray has a patient-specific profile configured during a preoperative plan to closely match a corresponding profile of a tibia of a specific patient based on 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.

2. The orthopedic implant of claim 1, wherein the locking mechanism includes a plurality of recesses on the tibial tray.

3. The orthopedic implant of claim 1, wherein the tibial tray is designed in sizing increments of less than 2 mm.

4. The orthopedic implant of claim 3, wherein the sizing increments correspond to a width of the tibial tray.

5. The orthopedic implant of claim 1, wherein the patient-specific profile of the tibial tray is configured to match at least one of a medial portion and a lateral portion of the corresponding profile of the tibia of the specific patient based on the three-dimensional digital image of the patient'"'"'s joint.