US 6,652,260 B2 · Composite allograft press

Abstract

A press to form a composite acetabular allograft cup for use in hip replacement surgery is disclosed. The acetabular cup formed by the press comprises bone cement and cancellous bone chips. The press includes a two-piece mold for forming the acetabular cup. The mold is removable from the press and may be available in many different sizes to accommodate a range of patients. A screw-type compression means is utilized to force the acetabular cup into the desired shape. A compression gauge allows the operator to monitor the pressure applied as the acetabular cup is formed to prevent excessive crushing of cancellous bone chips. Breaking jaws are used to separate the acetabular cup from the upper portion of the mold after the bone cement has set and the acetabular cup is formed.

Claims15

Dependent claims

A press for molding a composite allograft, the press comprising:

(a) a base;
(b) a transverse upper frame movable relative to said base;
(c) an upper mold attachable to said upper frame;
(d) a lower mold attachable to said base;
(e) compression means in communication with said upper frame and said base, and operable to apply a load between said upper mold and said lower mold;
and
(f) at least one breaking jaw wherein the composite allograft may be separated from said upper mold by manipulation of said breaking jaw.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

09/879,564Filed 12 Jun 2001 · continuation in part

Priority

11 Mar 1996

Published

US 2002/0025358 A128 Feb 2002

Granted

25 Nov 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification22 codes

B30B 1/18
Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust…
A61F 2/30942
Designing or manufacturing processes: for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element…
A61F 2/34
For the hip: acetabular cups
B29C 43/006
Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor: pressing and sintering powders, granules…

Family

Application08/647,424Parent of this division · filed 11 Mar 1996

Application09/121,938Parent of this continuation · filed 24 Jul 1998

Application09/343,135Parent of this continuation-in-part · filed 29 Jun 1999

US 2002/0025358 A1Pre-grant publication · published 28 Feb 2002

US 6,293,971 B1Parent of this continuation-in-part

Application09/343,135Parent of this continuation

US 5,981,828 AParent of this continuation

Application09/121,938Parent of this division

US 5,824,078 AParent of this division

US 6,652,260 B2This patent

From the US filing history. Foreign family members aren’t listed.

Composite allograft press

Life of this patent

Composite allograft press

Life of this patent

Abstract

Claims15