Intraoperative method of restoring the surface smoothness of total knee replacement components

US5413606A · kind A · utility

Inventors

• Albert W. Fisk · Rescue, US
• Thomas Fisk · London, GB

Key dates

• Filing date: Aug 9, 1993
• Grant date: May 9, 1995
• Expiry date: Aug 9, 2013

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2/30767
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An intraoperative method is provided for the restoration of the bearing surface smoothness of an otherwise well-fixed and well-aligned femoral knee component. This method is an alternative, in appropriate circumstances, to total component replacement. Polishing and buffing techniques are disclosed which substantially reduce the depth and areal extent of scratches and abrasions resulting from metal to metal contact, particularly between a worn, metal-backed patellar component and a femoral component, as well as abrasions resulting from migration of debris that imbeds itself in plastic bearing surfaces prior to surgical reintervention, primarily in the distal condyle areas. Debris generated by the polishing process, along with saline solution, or the like, washes used to flush the debris are isolated from the surgical field by a specially designed draping system.