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:
May. 28, 1996
Filed:
May. 16, 1994
Thomas Luckman, East Falmouth, MA (US);
Johnson & Johnson Professional, Inc., Raynham, MA (US);
Abstract
The present invention relates to an instrument and method for performing a partial knee replacement and, in particular, a single condyle replacement method. The instrument includes a tibial mounted platform which has formed thereon a keyed slot for receiving a spacer which spacer is positioned between the femur and tibia of the knee joint being replaced. The spacer receives thereon a positioning element which positioning element includes guides for guiding a drill to drill mounting holes for mounting further instruments used in the knee operation. In particular, the mounting holes are drilled when the femur and tibia are in a predetermined angular relationship with the spacer providing a predetermined spacial relationship. In this way, the mounting holes are properly determined and positioned with respect to the relationship between the femur and tibia. A saw guide is mounted to the mounting holes and used to guide a saw when cutting the anterior chamfer, the posterior chamfer and the posterior femoral cut. A further drill guide is then mounted to the mounting holes after removal of the saw guide for drilling holes for receiving the lugs of the condyle prosthesis.