Surgery – Instruments – Orthopedic instrumentation
Patent
1996-05-29
1998-02-10
Buiz, Michael
Surgery
Instruments
Orthopedic instrumentation
606 72, 606 73, 606 77, A61B 1758
Patent
active
057163596
ABSTRACT:
An anchor including a shank formed from a hardened product of a calcium phosphate compound. The anchor having a strength capable of retaining its original shape, before, during and after insertion into a pre-drilled hole of a bone, and a brittleness capable of causing its original shape to disintegrate as a result of a breakage of the shank upon an application of a driving force from the screw to the shank during a driving of the screw through the anchor inserted in the bone. The present invention also relates to a method for fixing a screw in a bone. Using the anchor of the present invention, it becomes possible to easily and reliably fix a screw in a bone having a reduced strength.
REFERENCES:
patent: 4778471 (1988-10-01), Bajpai
patent: 4798585 (1989-01-01), Inoue et al.
patent: 4969913 (1990-11-01), Ojima
patent: 5017518 (1991-05-01), Hirayama et al.
patent: 5064436 (1991-11-01), Ogiso et al.
patent: 5084050 (1992-01-01), Draenert
patent: 5147361 (1992-09-01), Ojima et al.
patent: 5149368 (1992-09-01), Liu et al.
Kohketsu Masahiro
Ojima Satoshi
Asahi Kogaku Kogyo Kabushiki Kaisha
Buiz Michael
Woo Julian W.
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