Chris M Patterson

US Patent:

20070233071, Oct 4, 2007

Filed:

Mar 1, 2006

Appl. No.:

11/365565

Inventors:

Jonathan Dewey - Memphis TN, US
Chris Patterson - Olive Branch MS, US

International Classification:

A61F 2/30

US Classification:

606061000

Abstract:

A bone anchor including a bone engaging element and an implant engaging element. The bone engaging element includes a first portion formed of a first material and a second portion formed of a second material and extending at least partially along a length of the first portion, and with the second portion of the bone engaging element positioned between the first portion and adjacent bone tissue when the bone engaging element is engaged with the bone to provide an interface with the adjacent bone tissue. In one embodiment, the first portion of the bone engaging element exhibits a first level of rigidity and the second portion exhibits a second level of rigidity less than the first level of rigidity. In another embodiment, the bone engaging element includes external threads, with the second portion of the bone engaging element defining at least a portion of the external threads.

US Patent:

20070270831, Nov 22, 2007

Filed:

May 1, 2006

Appl. No.:

11/414878

Inventors:

Jonathan Dewey - Memphis TN, US
Chris Patterson - Olive Branch MS, US

Assignee:

SDGI Holdings, Inc. - Wilmington DE

International Classification:

A61F 2/30

US Classification:

606061000

Abstract:

A bone anchor system including a bone anchor having an integral head, a stabilization member, and a coupling member molded around the integral head of the bone anchor is provided for coupling the bone anchor to the stabilization member. The coupling member includes an interface to the stabilization member. Advantageously, the interface to the stabilization member is made of a deform able material to reduce surface stress concentration in the stabilization member. The interface of the coupling member may be integral to the coupling member, or the interface may be an interface piece that may be inserted into the coupling member. The integral head of a bone anchor may include a molded cap that is formed from a deformable material and configured to provide an interface to the stabilization member.