Surgery – Instruments – Orthopedic instrumentation
Patent
1994-11-21
1997-08-05
Tucker, Guy V.
Surgery
Instruments
Orthopedic instrumentation
606 61, A61B 1768
Patent
active
056537107
ABSTRACT:
An osteosynthetic member, such as a bone screw, is provided with a weakened zone which breaks in response to the application of excessive bending, shearing and/or other stresses. The location of the weakened zone is selected in such a way that it is spaced apart from a bone into which an externally threaded section of the member extends. This ensures that the protruding part of the externally threaded section can be engaged by pliers, by a screwdriver or another suitable tool to withdraw the externally threaded section from the bone.
REFERENCES:
patent: 5019078 (1991-05-01), Perren et al.
patent: 5129900 (1992-07-01), Asher et al.
patent: 5269784 (1993-12-01), Mast
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