Brian K Austin

US Patent:

58794050, Mar 9, 1999

Filed:

May 23, 1997

Appl. No.:

8/863083

Inventors:

Michael D. Ries - Cooperstown NY
Brian Austin - Germantown TN
David L. Evans - Bartlett TN
Steve Miller - Memphis TN
Jeff Shea - Memphis TN

Assignee:

Smith & Nephew, Inc. - Memphis TN

International Classification:

A61F 230

US Classification:

623 22

Abstract:

An improved acetabular cup prosthesis has a cup body with inner convex and outer concave surfaces. The cup body has an apex and a base that defines a plane. The cup body outer convex surface has a curved annular portion between the base and the transition. In one embodiment, the outer convex surface is a curved annular surface extending in between the rim and a distance about two fifths to three fifths (2/5-3/5) of the distance between the rim and the apex. In another embodiment, a plurality of cup bodies are provided in a range of sizes between about 40 mm and 80 mm. Each cup body has a companion rotary reamer that is correspondingly shaped. The companion cup body is oversized between about 1 mm and 3 mm so that a generally constant change in volume is provided for all cup sizes between 40 mm and 80 mm.

US Patent:

57829284, Jul 21, 1998

Filed:

Oct 23, 1996

Appl. No.:

8/735516

Inventors:

Michael D. Ries - Cooperstown NY
Brian Austin - Germantown TN
David L. Evans - Bartlett TN
Steve Miller - Memphis TN
Jeff Shea - Memphis TN

Assignee:

Smith & Nephew, Inc. - Memphis TN

International Classification:

A61F 234

US Classification:

623 22

Abstract:

An improved acetabular cup prosthesis has a cup body with inner convex and outer concave surfaces. The cup body has an apex and a base that defines a plane. The cup body outer convex surface has a toroidally shaped portion between the base and the transition. In one embodiment, the outer convex surface is toroidally shaped between the rim and a distance about one third of the distance of the rim to the apex. In another embodiment, a plurality of cup bodies are provided in a range of sizes between about 40 mm and 80 mm. Each cup body has a companion rotary reamer that is correspondingly shaped. The companion cup body is oversized between about 1 mm and 3 mm so that a generally constant change in volume is provided for all cup sizes between 40 mm and 80 mm.

US Patent:

56767048, Oct 14, 1997

Filed:

Nov 27, 1995

Appl. No.:

8/563219

Inventors:

Michael D. Ries - Cooperstown NY
Brian Austin - Germantown TN
David L. Evans - Bartlett TN
Steve Miller - Memphis TN
Jeff Shea - Memphis TN

Assignee:

Smith & Nephew, Inc. - Memphis TN

International Classification:

A61F 230

US Classification:

623 18

Abstract:

An improved acetabular cup prosthesis has a cup body with correspondingly shaped outer convex and inner concave surfaces. The cup body has an apex and a base that defines a plane. The cup body outer convex surface has first and second curved, shaped portions positioned in between the base and the apex. In one embodiment, the outer convex surface has specially shaped portion in between the rim and a distance about one third of the distance of the rim to the apex. This specially shaded portion forms an interference fit with a patient's acetabular socket.