Patient-modified implant

• US 9,993,344 B2
• Filed: 03/16/2015
• Issued: 06/12/2018
• 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
• Application Number:
  US14/658,429
• Publication Number:
  US 20150320508A1
• Time in Patent Office: 1,184 Days
• Field of Search: None
• 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 system comprising:

a plurality of orthopedic implants comprising;

an inner bone-engaging surface having a length in an anterior-posterior direction that is standardized so as to be independent of an anatomy of a specific patient'"'"'s joint but is rather one of a series of predetermined size increments for the orthopedic implant system with the length in the anterior-posterior direction of each of the plurality of orthopedic implants differing, each size increment varying by a set amount of the length in the anterior-posterior direction relative to others, wherein the inner bone-engaging surface includes a plurality of planar surfaces configured for engagement with bone cuts to a femur, the bone cuts having an overall length when combined in the anterior-posterior direction that is configured to correspond to that of the inner bone-engaging surface of the orthopedic implant; and

at least one of the plurality of orthopedic implants having a joint facing portion opposing the inner bone-engaging surface including at least one feature configured to be patient-specific based on an image of the specific patient'"'"'s joint, wherein the at least one feature is designed using computer modeling to have a shape dependent upon an anatomy of the specific patient.

2. The orthopedic implant system of claim 1, wherein the series of size increments are in increments of 3 mm or less.

3. The orthopedic implant system of claim 1, wherein the at least one feature is a medial/lateral width of the at least one of the plurality of orthopedic implants.

4. The orthopedic implant system of claim 1, wherein the orthopedic implant is a femoral knee implant and the at least one feature includes an orientation of a patella track of the femoral knee implant.

5. The orthopedic implant system of claim 1, wherein the orthopedic implant is a femoral knee implant and the at least one feature includes a depth of a patella track of the femoral knee implant.

6. The orthopedic implant system of claim 1, wherein the orthopedic implant is a femoral knee implant and the at least one feature includes a shape of an anterior flange of the femoral knee implant.

7. The orthopedic implant system of claim 1, wherein the orthopedic implant is a femoral knee implant and the at least one feature includes a height of an anterior flange of the femoral knee implant.

8. An orthopedic implant system comprising:

a plurality of orthopedic implants comprising;

an inner bone-engaging surface including a plurality of planar surfaces configured for engagement with corresponding femoral bone cuts, wherein the plurality of orthopedic implants are standardized so as to be independent of the anatomy of a specific patient'"'"'s joint but each of the plurality of orthopedic implants has a different length in an anterior-posterior direction that is one of a series of predetermined size increments for the implant system, wherein each size increment varies by a set amount of length in the anterior-posterior direction relative to others, and wherein selection of which one of the plurality of orthopedic implants is utilized is made by ascertaining a closest fit from the plurality of orthopedic implants by overlaying the plurality of orthopedic implants on an image of the specific patient'"'"'s joint using computer modeling; and

at least one of the plurality of implants having a joint facing portion opposing the inner bone-engaging surface configured during a preoperative plan to have a patient-specific feature based on the image of the specific patient'"'"'s joint, wherein the patient-specific feature is designed using computer modeling to have a shape dependent upon the anatomy of the specific patient by modifying a computer model of the one of the plurality of orthopedic implants selected to provide for the patient specific feature, wherein the computer model includes a plurality of planar surfaces corresponding to the plurality of planar surfaces of the inner bone-engaging surface of the one of the plurality of orthopedic implants selected that remain unmodified.

9. The orthopedic implant system of claim 8, wherein the patient-specific feature includes a medial/lateral width.

10. The orthopedic implant system of claim 8, wherein the joint facing portion includes an anterior flange and the patient-specific feature includes a shape of the anterior flange.

11. The orthopedic implant system of claim 8, wherein the joint facing portion includes an anterior flange and the patient-specific feature includes a height of the anterior flange.

12. The orthopedic implant system of claim 8, wherein the joint facing portion includes a patella track and the patient-specific feature includes an orientation of the patella track.

13. The orthopedic implant system of claim 8, wherein the joint facing portion includes a patella track and the patient-specific feature includes a depth of the patella track.

14. The orthopedic implant system of claim 8, wherein the joint facing portion includes an anterior flange and the patient-specific feature includes a medial/lateral width of the first portion, a shape of the anterior flange, and a height of the anterior flange.

15. The orthopedic implant system of claim 14, wherein the joint facing portion includes a patella track and the patient-specific feature includes an orientation of the patella track and a depth of the patella track.

16. An orthopedic implant system comprising:

a plurality of orthopedic implants comprising;

an inner bone-engaging surface having a length in an anterior-posterior direction that is standardized so as to be independent of an anatomy of a specific patient'"'"'s joint but is rather one of a series of predetermined size increments for the orthopedic implant system with the length in the anterior-posterior direction of each of the plurality of orthopedic implants differing, each size increment varying by a set amount of the length in the anterior-posterior direction relative to others, wherein the inner bone-engaging surface includes a plurality of planar surfaces configured for engagement with bone cuts, the bone cuts having an overall length when combined in the anterior-posterior direction that is configured to correspond to that of the inner bone-engaging surface of the orthopedic implant; and

at least one of the plurality of orthopedic implants having one or more of an orientation of a patella track, a depth of the patella track, a height of an anterior flange, a shape of the anterior flange, and a medial/lateral width that is configured to be patient-specific based on an image of the specific patient'"'"'s joint, wherein the at least one feature is designed using computer modeling to have a shape dependent upon an anatomy of the specific patient.