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

Patent metadata

Field	Value
Publication number	US-9387079-B2
Application number	US-201314051087-A
Country	US
Kind code	B2
Filing date	Oct 10, 2013
Priority date	May 25, 2001
Publication date	Jul 12, 2016
Grant date	Jul 12, 2016

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.

First claim

What is claimed is:

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.

Assignees

• Conformis Inc

Inventors

• Bojarski Raymond A
• Slamin John
• Lang Philipp
• Fitz Wolfgang
• Steines Daniel

Classifications

• A61F2/30 Primary

  Joints · CPC title

• A61F2/30942 Primary

  for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques · CPC title

• A61F2/461

  of knees · CPC title

• A61F2002/30948

  using computerized tomography, i.e. CT scans · CPC title

• A61F2002/30326

  differing in height or in length · CPC title