Surgery – Instruments – Orthopedic instrumentation
Patent
1996-01-05
1997-09-30
Buiz, Michael
Surgery
Instruments
Orthopedic instrumentation
606 59, 606 72, 411451, 411482, A61B 1756
Patent
active
056721781
ABSTRACT:
A fixation pin has a cylindrical body having a proximal end with two axially separated heads with an annular groove between them. The distal end of the cylindrical body has a tapered conical point. In the preferred embodiment, the cylindrical body has a plurality of circumferentially spaced longitudinally extending grooves which extend from just proximal of the pointed end of the fixation pin, proximally toward the proximal end. Each groove extends into the cylindrical body to an extent not exceeding 30% of the diameter of a cross-section of the cylindrical body and each groove has an outwardly facing opening which subtends in the range of about 7% to about 17% of the circumference of the cylindrical body. The grooves receive bone material when the pin is driven into a bone and prevent rotation of the pin while preventing the pin from backing out of the bone.
REFERENCES:
patent: 456723 (1891-07-01), Harvey
patent: 2251202 (1941-07-01), Purtell
patent: 4430761 (1984-02-01), Niederer et al.
patent: 4712541 (1987-12-01), Harder et al.
patent: 4755091 (1988-07-01), Potucek et al.
patent: 4869242 (1989-09-01), Galluzzo
patent: 5011354 (1991-04-01), Brownlee
patent: 5306275 (1994-04-01), Bryan
Buiz Michael
Spiegel H. Jay
Woo Julian W.
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