Steven R Whitlock

US Patent:

52717372, Dec 21, 1993

Filed:

Sep 4, 1992

Appl. No.:

7/940441

Inventors:

James L. Baldwin - Portland OR
Steven I. Whitlock - Austin TX

Assignee:

U.S. Medical Products, Inc. - Austin TX

International Classification:

A61F 238

US Classification:

623 20

Abstract:

A tibial prosthetic implant includes a base or base plate with an offset tibial stem. The base includes an inferior surface adapted to abut a resected surface of a patient's tibia and forms a base for articulating surfaces adapted to articulate with the patient's femoral condyles. The longitudinal center axis of the tibial stem extends from the inferior surface of the base and is offset from a center of the base. The offset places the stem in position to extend into the central canal of the tibia so that it does not substantially interfere with the cortical bone when the inferior surface of the base substantially abuts and aligns with the resected surface of the tibia.

US Patent:

RE372773, Jul 10, 2001

Filed:

Sep 18, 1995

Appl. No.:

8/529671

Inventors:

James L. Baldwin - Portland OR
Steven I. Whitlock - Austin TX

Assignee:

Hayes Medical, Inc. - Sacramento CA

International Classification:

A61F 238

US Classification:

623 20

Abstract:

A tibial prosthetic implant includes a base or base plate with an offset tibial stem. The base includes an inferior surface adapted to abut a resected surface of a patient's tibia and forms a base for articulating surfaces adapted to articulate with the patient's femoral condyles. The longitudinal center axis of the tibial stem extends from the inferior surface of the base and is offset from a center of the base. The offset places the stem in position to extend into the central canal of the tibia so that it does not substantially interfere with the cortical bone when the inferior surface of the base substantially abuts and aligns with the resected surface of the tibia.

US Patent:

57163600, Feb 10, 1998

Filed:

Jun 30, 1995

Appl. No.:

8/497537

Inventors:

James L. Baldwin - Portland OR
James M. Freid - Austin TX
Steven I. Whitlock - Austin TX
Mark L. Rehmann - Pflugerville TX

Assignee:

U.S. Medical Products - Austin TX

International Classification:

A61B 1756

US Classification:

606 80

Abstract:

A patella recession instrument (10) and method provides a guide for producing an oval, tri-oval, or elliptically shaped recess on the posterior surface of the osteotomized patella for receiving a similarly shaped backing portion of a patellar implant. The apparatus includes a guide bushing (12) and a bushing positioning mechanism (14) for securing the bushing against the posterior of the osteotomized patella, with a guide opening (54) formed through the bushing covering the total area to be recessed. A reamer guide structure, which may be a separate structure (16) received in the bushing guide opening (54) or integrally formed with the bushing (12), receives one or more rotary reamer tools (18) in a plurality of reaming positions. The cutting face (80) of the rotary reamer tool (18) in each different reaming position covers a different portion of the total area to be recessed. The recession method includes securing the guide bushing (12) in the proper operating position against the patella, sequentially positioning the cutting face (80) of the reamer tool (18) or tools in the plurality of different reaming positions, and operating the tool or tools to produce a series of intermediate recesses that combine to approximate the total area to be recessed.