Impaction instruments

Details Impaction instruments Impaction instruments

1998-09-30

2000-10-03

Buiz, Michael

Surgery

Instruments

Orthopedic instrumentation

623 23, A61B 1756

Patent

active

061266590

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.

REFERENCES:
patent: 5019108 (1991-05-01), Bertin et al.
patent: 5192283 (1993-03-01), Ling et al.
patent: 5470336 (1995-11-01), Ling et al.
patent: 5507830 (1996-04-01), DeMane et al.

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