Method for cementing intramedullary bone prosthesis

Details Method for cementing intramedullary bone prosthesis Method for cementing intramedullary bone prosthesis

Filed on

1993-12-10

Date issued

1997-01-28

Examiner

Isabella, David

Patent Class

Prosthesis (i.e., artificial body members), parts thereof, or ai

SubClass

Implantable prosthesis

SubSubClass

Bone

Other Related Categories

623 16, 606 94, 606 92, 606 93, 606 95, A61F 232, A61F 228, A61F 504

Type

Patent

Status

active

Patent number

055973833

Description

ABSTRACT:
An intramedullary bone prosthesis to be rigidly cemented into position in the femur, and also applicable to total knee and shoulder replacement operations, is provided as an improved surgical technique. The prosthesis is composed of a femoral head base, a femoral head post, a long femoral stem, a cement canal along its longitudinal axis, a spacer, a collar, and a distal restrictor. The prosthesis is placed into the prepared medullary canal. With collar in position, a bone cement injector is readily threaded on to the proximal portion of the cement canal. Cement is injected and subsequently travels down through the canal, through the spacer, and eventually exits openings at the bottom of the spacer. The distal restrictor plug halts downward cement travel, thus initiating an upward, substantially completely retrograde filling of the void in between the prosthesis and the cancellous bone wall. The cement reaches the collar or cement restrictor, thus proximally dislodging all air bubbles, blood, and blood products. Finally during curing, the cement injector, and excellent cement interdigitation is achieved.

REFERENCES:
patent: 5116377 (1992-05-01), Skripitz et al.
patent: 5133772 (1992-07-01), Hack et al.

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