Surgery – Truss – Perineal
Patent
1980-05-09
1983-09-13
Frinks, Ronald L.
Surgery
Truss
Perineal
3 19, 128 92G, A61F 504, A61B 1718
Patent
active
044036060
ABSTRACT:
An internal fixation plate for bridging two portions of a broken bone is formed to have properties, in terms of bending, axial, and torsional stiffness suitable for the bone being mended. These properties include high resistance to bending and torsional stresses, and relatively low axial stiffness. One plate configuration which has been determined to have the desired stiffness properties is an elongated flat hollow metal plate or tube. Arrangements are provided for precluding bone ingrowth, and this may be achieved by filling the member with a medically inert substance, such as silicone rubber or ultra high molecular weight polyethylene, or by sealing the openings into the tubular plate. The materials of the bone fixation plate may be selected for their mechanical properties, and also as biologically inert substances which will not have adverse physiological effects when embedded in the human body.
REFERENCES:
patent: 2406832 (1946-09-01), Hardinge
patent: 2486303 (1949-10-01), Longfellow
patent: 3893196 (1975-07-01), Hochman
patent: 4040129 (1977-08-01), Steinemann et al.
patent: 4089071 (1978-05-01), Kalnberz et al.
patent: 4219015 (1980-08-01), Steinemann
patent: 4297993 (1981-11-01), Harle
Implants in Surgery (Book) by D. F. Williams et al., W. B. Saunders Co. Ltd. (Publisher), London, Philadelphia, Toronto, 1973, pp. 89-94.
"A Simple Method of Onlay Bone Grafting", by A. Young et al., The Lancet, Dec. 8, 1962, pp. 1186-1187.
"Potential Application of Graphite Fiber and Methyl Methacrylate Resin Composites as Internal Fixation Plates", by S. L-Y. Woo et al., J. Biomed. Mater. Res., vol. 8, No. 5, Sep. 1974, pp. 321-338.
Akeson Wayne H.
Woo Savio L-Y.
Frinks Ronald L.
The Regents of the University of California
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