The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 02, 1999
Filed:
Sep. 06, 1996
Roy D Bloebaum, Salt Lake City, UT (US);
Other;
Abstract
A prosthetic joint component and related placement method are provided for cemented fixation to a prepared patient bone, with a cement layer and mantle of controlled, predetermined thickness. The prosthetic component, such as a tibial or femoral component for a knee prosthesis, includes an attachment surface with a plurality of spacer pegs protruding therefrom, and bounded by a taller flow restrictor wall which cooperates with the shorter spacer pegs and attachment surface to define an open-sided cavity for receiving a quantity of bone cement. An intruder tool is provided to form a shallow recess in the prepared patient bone for seated reception of the flow restrictor wall on the prosthetic component. The cement cavity of the prosthetic component is filled with bone cement to a height slightly above the spacer pegs and below the flow restrictor wall, whereupon the prosthetic component is placed onto the patient bone with the flow restrictor wall seated within the recess and the spacer pegs contacting the patient bone. During placement of the prosthetic component, the flow restrictor wall prevents lateral escape of the bone cement, resulting in a cement layer and mantle of selected thickness to achieve a substantially optimum strength attachment interface, while preventing cement breakdown at the cement implant interface.