Patient-adapted and improved articular implants, designs and related guide tools

• US 9,387,079 B2
• Filed: 10/10/2013
• Issued: 07/12/2016
• Est. Priority Date: 05/25/2001
• Status: Expired due to Term

• Current Assignee: Conformis Incorporated
• Original Assignee: Conformis Incorporated
• Inventors: Bojarski, Raymond A., Slamin, John, Lang, Philipp, Fitz, Wolfgang, Steines, Daniel
• Primary Examiner(s): Philogene, Pedro
• Application Number:
  US14/051,087
• Publication Number:
  US 20140194996A1
• Time in Patent Office: 1,006 Days
• Field of Search: 623 2014- 2036, 606 87- 89, 606/86.R
• US Class Current: 1/1
• CPC Class Codes: A61B 17/1764 for the knee
• CPC Class Codes: A61F 2/30 Joints
• 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 2/3859 Femoral components
• CPC Class Codes: A61F 2/3886 for stabilising knees against anterior or lateral dislocations
• CPC Class Codes: A61F 2/389 Tibial components A61F2/3868 takes precedence
• CPC Class Codes: A61F 2/461 of knees
• CPC Class Codes: A61F 2002/30322 differing in surface structures
• CPC Class Codes: A61F 2002/30324 differing in thickness
• CPC Class Codes: A61F 2002/30326 differing in height or in length
• CPC Class Codes: A61F 2002/30327 differing in diameter
• 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 2250/0036 differing in thickness
• CPC Class Codes: A61F 2250/0039 differing in diameter
• CPC Class Codes: B33Y 80/00 Products made by additive manufacturing
• CPC Class Codes: Y10T 29/49 Method of mechanical manufacture

Abstract

Methods and devices are disclosed relating improved articular models, implant components, and related guide tools and procedures. In addition, methods and devices are disclosed relating articular models, implant components, and/or related guide tools and procedures that include one or more features derived from patient-data, for example, images of the patient'"'"'s joint. The data can be used to create a model for analyzing a patient'"'"'s joint and to devise and evaluate a course of corrective action. The data also can be used to create patient-adapted implant components and related tools and procedures.

Claims

1. A patient-specific femoral implant for implantation on a portion of a femur of a patient'"'"'s knee, comprising:

a condylar portion having a bone-facing surface for abutting at least a portion of a condyle of the patient'"'"'s knee and an articular surface generally opposite the bone-facing surface;

the articular surface having a patient-specific curvature generally disposed in a first plane, the patient-specific curvature substantially replicating a corresponding curvature of at least a portion of the patient'"'"'s condyle and being located approximately in the same location as the corresponding curvature of the patient'"'"'s condyle when the bone-facing surface abuts the condyle.

2. The patient-specific femoral implant of claim 1, wherein the patient-specific curvature includes varying radii or curvatures in the first plane.

3. The patient-specific femoral implant of claim 1, wherein the first plane is an anteroposterior, mediolateral, superoinferior or oblique plane.

4. The patient-specific femoral implant of claim 1, wherein the articular surface includes a single radius in one or more planes.

5. A patient-specific femoral implant for implantation on a portion of a femur of a patient'"'"'s knee, comprising:

a first condylar portion having a first bone-facing surface for abutting at least a portion of a first condyle of the patient'"'"'s knee and a first articular surface generally opposite the first bone-facing surface; and

a second condylar portion having a second bone-facing surface for abutting at least a portion of a second condyle of the patient'"'"'s knee and a second articular surface generally opposite the second bone-facing surface;

the first articular surface having a first patient-specific curvature generally disposed in a first plane, the first patient-specific curvature substantially replicating a curvature of the patient'"'"'s first condyle and being located approximately in the same location as the curvature of the patient'"'"'s first condyle when the first bone-facing surface abuts the condyle; and

the second articular surface having a second patient-specific curvature generally disposed in a second plane, the second patient-specific curvature substantially replicating a curvature of the patient'"'"'s second condyle and being located approximately in the same location as the curvature of the patient'"'"'s second condyle when the second bone-facing surface abuts the second condyle.

6. The patient-specific femoral implant of claim 5, wherein the first patient-specific curvature include varying radii in a first plane.

7. The patient-specific femoral implant of claim 6, wherein the first plane is an anteroposterior, mediolateral, superoinferior or oblique plane.

8. The patient-specific femoral implant of claim 5, wherein the second patient-specific curvature include varying radii in a second plane.

9. The patient-specific femoral implant of claim 8, wherein the second plane is an anteroposterior, mediolateral, superoinferior or oblique plane.

10. The patient-specific femoral implant of claim 5, wherein the first articular surface includes a single radius in one or more planes.

11. The patient-specific femoral implant of claim 5, wherein the second articular surface includes a single radius in one or more planes.