Method and instrumentation for unicompartmental total knee arthroplasty
US5234433A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1991 |
| Grant date | Aug 10, 1993 |
| Priority date | — |
| Expiry date | Oct 18, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2/38
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method and instruments for replacing the articulating surfaces of a knee joint in which the diseased area is restricted to one of the medial and lateral compartments. A femoral intramedullary rod is placed down the center of the femur. A femoral cutting block is affixed at one side to the rod and at the other side to an outrigger attached to the femur by smooth pins. The cutting block is adjustable rotationally and in the anterior-posterior plane. The cutting block is provided with surgical saw guide slots for the posterior and distal articular surface cuts and the chamfer cuts, all of which are made with the cutting block in place. The cutting block is removed and a drill guide is used for drilling two holes in the distal articular cut surface for receipt of the mounting pegs of the femoral unicompartmental prosthetic implant. A tibial intramedullary rod is placed down the center of the tibia, to which is adjustably affixed a vertical cutting block, a horizontal cutting guide and a caliper measuring device. The caliper measuring device is used to properly locate the cutting guide and the horizontal tibial cut is made. Upon removal of the measuring device and cutting guide, the c…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.