Impaction instruments
US6126659A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1998 |
| Grant date | Oct 3, 2000 |
| Priority date | — |
| Expiry date | Sep 30, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2250/0064
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An instrument and method are provided for compacting bone chips into a prepared metaphyseal portion of a femur, in order to conform the femur to receive a femoral implant stem. The instrument comprises a tamping stem having a shape and size corresponding to the implant stem. The instrument also comprises a plurality of wedge-shaped enlarging portions ranging from largest to smallest. The method involves selecting appropriate sized enlarging portions, attaching the largest wedges to the instrument, placing the instrument into the femur, supplying bone chips, impacting the instrument to compact bone chips, and repeating compaction with successively smaller wedges until the femur is conformed to receive the femoral implant stem. Once inserted into the femur, the distal end of the instrument remains in contact with the diaphysis throughout the bone chip compaction process. Thus, bone chips cannot enter the diaphysis, and the instrument remains in proper alignment throughout the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.