Patient-specific and patient-engineered orthopedic implants

• US 10,085,839 B2
• Filed: 12/10/2010
• Issued: 10/02/2018
• Est. Priority Date: 01/05/2004
• Status: Expired due to Fees

• Current Assignee: Conformis Incorporated
• Original Assignee: Conformis Incorporated
• Inventors: Wong, Terrance, Slamin, John, Lang, Philipp
• Primary Examiner(s): Schillinger, Ann
• Application Number:
  US12/965,493
• Publication Number:
  US 20110144760A1
• Time in Patent Office: 2,853 Days
• Field of Search: 623 1312- 1316, 623 2014- 2036
• CPC Class Codes: A61F 2/30756 Cartilage endoprostheses A61F2/3603 takes precedence
• CPC Class Codes: A61F 2/30767 Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
• 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 2/3872 Meniscus for implantation between the natural bone surfaces
• CPC Class Codes: A61F 2/3877 Patellae or trochleae
• CPC Class Codes: A61F 2/4657 Measuring instruments used for implanting artificial joints for surgical instruments A61B90/06
• CPC Class Codes: A61F 2002/30011 differing in porosity
• CPC Class Codes: A61F 2002/30062 (bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive
• CPC Class Codes: A61F 2002/30092 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2002/30179 X-shaped
• CPC Class Codes: A61F 2002/30604 modular
• CPC Class Codes: A61F 2002/30616 Sets comprising a plurality of prosthetic parts of different sizes or orientations
• CPC Class Codes: A61F 2002/30892 parallel
• CPC Class Codes: A61F 2002/30894 inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/30929 having at least two superposed coatings
• CPC Class Codes: A61F 2002/30948 using computerized tomography, i.e. CT scans
• CPC Class Codes: A61F 2002/3895 unicompartimental
• CPC Class Codes: A61F 2210/0004 bioabsorbable
• CPC Class Codes: A61F 2210/0014 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2230/0028 : Shapes in the form of latin or greek characters
• CPC Class Codes: A61F 2250/0023 : differing in porosity
• CPC Class Codes: A61F 2310/00017 : Iron- or Fe-based alloys, e.g. stainless steel
• CPC Class Codes: A61F 2310/00023 : Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00029 : Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
• CPC Class Codes: A61F 2310/00047 : Aluminium or Al-based alloys
• CPC Class Codes: A61F 2310/00065 : Manganese or Mn-based alloys
• CPC Class Codes: A61F 2310/00071 : Nickel or Ni-based alloys
• CPC Class Codes: A61F 2310/00077 : Copper or Cu-based alloys
• CPC Class Codes: A61F 2310/00083 : Zinc or Zn-based alloys
• CPC Class Codes: A61F 2310/00107 : Palladium or Pd-based alloys
• CPC Class Codes: A61F 2310/00113 : Silver or Ag-based alloys
• CPC Class Codes: A61F 2310/00119 : Tin or Sn-based alloys
• CPC Class Codes: A61F 2310/00131 : Tantalum or Ta-based alloys
• CPC Class Codes: A61F 2310/00149 : Platinum or Pt-based alloys
• CPC Class Codes: A61F 2310/00155 : Gold or Au-based alloys
• CPC Class Codes: A61F 2310/00395 : Coating or prosthesis-covering structure made of metals or of alloys
• CPC Class Codes: A61F 2310/00592 : Coating or prosthesis-covering structure made of ceramics or of ceramic-like compounds

Abstract

Disclosed herein are methods and devices for repairing a knee joint, including customizable and/or highly selectable implants and/or implant components for each patient to provide optimal fit and function.

Claims

1. A patient-specific bicompartmental knee implant for implantation into a patient'"'"'s knee joint, the implant comprising:

a body having a condylar portion and a trochlear portion,

wherein the condylar portion has a shape generally resembling a surface of a condyle of the patient'"'"'s knee joint and the trochlear portion having a shape generally resembling the surface of a trochlea of the patient'"'"'s knee joint, wherein the trochlear portion includes a patellofemoral (PF) region having a standard coronal curvature selected from a family of standard curvatures and a patient-specific sagittal curvature;

the condylar portion further having an articular surface, wherein at least a portion of the articular surface is configured to have a three-dimensional shape that includes articular shape information of a corresponding portion of the condyle of the patient'"'"'s knee joint; and

the condylar portion further having a bone-facing surface opposite the articular surface, wherein at least a first portion of the bone-facing surface is planar and at least a second portion of the bone-facing surface substantially matches a corresponding portion of an articular surface of the patient'"'"'s knee joint.

2. The implant of claim 1 wherein the planar portion of the bone-facing surface is located on a posterior of the condylar portion.

3. The implant of claim 1, wherein the condylar portion further comprises a third portion of the bone-facing surface, wherein the third portion is substantially planar.

4. The implant of claim 3, wherein the first and third portions are disposed at anterior and posterior ends of the implant and the second portion is disposed between the first and third portions.

5. The implant of claim 1, wherein the trochlear portion further comprises an articular surface wherein at least a portion of the articular surface is configured such that a curve of the at least a portion of the articular surface substantially matches a curve of a corresponding portion of an articular surface of the trochlea of the patient'"'"'s knee joint.

6. The implant of claim 1, wherein the trochlear portion further comprises a bone-facing surface opposite the articular surface, wherein at least a portion of the bone-facing surface is planar.

7. A patient-specific bicompartmental knee implant for implantation into a patient'"'"'s knee joint, the implant comprising:

a body having a condylar portion and a trochlear portion,

wherein the condylar portion has a shape generally resembling a surface of a condyle of the patient'"'"'s knee joint and the trochlear portion having a shape generally resembling the surface of a trochlea of the patient'"'"'s knee joint, wherein the trochlear portion includes a patellofemoral (PF) region having a standard coronal curvature selected from a family of standard curvatures and a patient-specific sagittal curvature;

the condylar portion further having an articular surface wherein at least a portion of the articular surface is configured to have a three-dimensional shape that includes articular shape information of a corresponding portion of the condyle of the patient'"'"'s knee joint; and

the trochlear portion having a bone-facing surface and an articular surface, wherein the bone-facing surface is generally opposite the articular surface and wherein at least a portion of the bone-facing surface is planar.

8. The implant of claim 7, wherein the condylar portion further comprises a bone-facing surface opposite the articular surface, wherein at least a portion of the bone-facing surface is planar.

9. The implant of claim 7, wherein the condylar portion further comprises a bone-facing surface opposite the articular surface, wherein at least a portion of the bone-facing surface substantially matches a corresponding portion of an articular surface of the patient'"'"'s knee joint.

10. The implant of claim 7, wherein the condylar portion further comprises a bone-facing surface opposite the articular surface, wherein at least a portion of the bone-facing surface is planar and at least a second portion of the bone-facing surface substantially matches a corresponding portion of an articular surface of the patient'"'"'s knee joint.

11. The implant of claim 10, wherein the planar portion of the bone-facing surface is located on a posterior of the condylar portion.

12. The implant of claim 7, wherein the condylar portion further comprises a bone-facing surface opposite the articular surface, wherein at least a first portion of the bone-facing surface is substantially planar, at least a second portion of the bone-facing surface substantially matches a corresponding portion of an articular surface of the patient'"'"'s knee joint, and at least a third portion of the bone-facing surface is substantially planar.

13. The implant of claim 12, wherein the first and third portions are disposed at anterior and posterior ends of the implant and the second portion is disposed between the first and third portions.

14. The implant of claim 7, wherein at least a portion of the articular surface of the trochlear portion is configured such that a curve of the at least a portion of the articular surface substantially matches a curve of a corresponding portion of an articular surface of a trochlea of the patient'"'"'s knee joint.