Surgical method and tool for repairing a patella of the knee joint
US5824099A · kind A · utility
Inventors
Key dates
| Filing date | Oct 24, 1996 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Oct 24, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2/3877
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A surgical method and tool for repairing a natural patella are provided. The method comprises the steps of: (a) preparing a natural patella by removing a portion thereof so as to leave a substantially convex remaining portion; and (b) fixing a patella implant onto the substantially convex remaining portion of the natural patella, the patella implant including: an upper surface for sliding over the femoral articulating member; a substantially concave under surface for fixation to the convex remaining portion of the natural patella; and a circumferential facet. A surgical tool according to the present invention comprises a substantially concave rotatable reaming member, the concavity of the reaming member being substantially equal to the concavity of the undersurface of the patella implant. The reaming member features a bit for drilling a hole in the natural patella so as to accept a peg connected to the patella implant. Alternatively, the bit may be used for guiding the reaming member through a central pre-drilled hole in the natural patella.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.