Surgical method and tool for repairing a patella of the knee joint
US6159246A · kind A · utility
Inventors
Key dates
| Filing date | Apr 11, 1997 |
| Grant date | Dec 12, 2000 |
| Priority date | — |
| Expiry date | Apr 11, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2230/0021
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A surgical method and device are provided which enable to prepare a natural patella for accepting a patella implant, while preserving a predetermined thickness of the natural patella. The device comprises: (a) a bone shaping element such as a reamer or a miller, including: (i) a rotatable bone shaping member having a lower edge; (ii) a shaft member having a scale including at least one marker; and (b) a guiding device for guiding the bone shaping element, including: (i) a patella holder for holding the natural patella; (ii) a pointer positioned at a constant distant from the patella holder for pointing at the marker, such that the distance between the pointer and the patella holder equals the sum of: the distance between the marker and the lower edge of the bone shaping member; and the preserved thickness of the natural patella. The method comprises: (a) holding the natural patella by means of a patella holder; (b) shaping the natural patella by means of a bone shaping element, the bone shaping element having: a marker; and a lower edge; (c) monitoring the shaping by means of a pointer, the distance between the pointer and the patella holder being equal to the sum of: (i) the dista…
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