HIP REPLACEMENT SYSTEMS AND METHODS

• US 20150039095A1
• Filed: 08/05/2014
• Published: 02/05/2015
• Est. Priority Date: 08/05/2013
• Status: Active Grant

• Current Assignee: William B. Kurtz
• Original Assignee: William B. Kurtz
• Inventors: Kurtz, William B.
• Granted Patent: US 9,492,184 B2
• Time in Patent Office: Days
• US Class Current: 623/23.21
• CPC Class Codes: A61B 17/1668 for the upper femur A61B17/164 takes precedence
• CPC Class Codes: A61B 17/175 for preparing the femur for hip prosthesis insertion
• 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 2/3609 Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts A61F2/3601 takes precedence
• CPC Class Codes: A61F 2002/30616 Sets comprising a plurality of prosthetic parts of different sizes or orientations
• CPC Class Codes: A61F 2002/3631 with an integral complete or partial peripheral collar or bearing shoulder at its base

Abstract

Disclosed are systems, methods, devices and surgical techniques for joint arthroplasty, including implant components that facilitate the position and implantation of a hip replacement using cutting guides and various femoral implant arrangements.

Claims

1. A femoral prosthesis for implantation into a resected proximal end of a femur, the prosthesis comprising:

a stem having a proximal end and a distal end,

a collar portion for placement in a location adjacent the proximal end of the stem to engage at least a portion of the resected proximal end of the femur, wherein the collar portion includes an interior surface at least partially in intimate contact with an outer surface of the femur when the stem is implanted into the femur.

2. The femoral prosthesis of claim 1, wherein the interior surface includes a patient-specific portion at least partially in intimate contact with an outer surface of the femur.

3. The femoral prosthesis of claim 1, wherein at least a portion of the collar portion is pre-operatively shaped to substantially match one or more anatomical features of the patient.

4. The femoral prosthesis of claim 1, wherein the collar portion includes a non-circular opening for accommodating the stem.

5. A method of preparing a femur for receiving an intramedullary femoral prosthesis, comprising:

obtaining a patient-specific guide tool adapted for forming an anterior to posterior hole in the femur at an intersection of an intended vertical femoral cut and an intended calcar femoral cut;

using the patient-specific guide tool to form the anterior to posterior hole in the femur;

using the anterior to posterior hole to at least partially guide the vertical femoral cut in the femur;

using the anterior to posterior hole to at least partially guide the calcar femoral cut in the femur; and

using the anterior to posterior hole to at least partially guide a femoral broach for reaming the bone to accept the femoral prosthesis.