Surgery – Truss – Pad
Patent
1975-07-16
1978-09-12
Frinks, Ronald L.
Surgery
Truss
Pad
3 1911, 3 122, 3 22, 128 92C, A61F 124
Patent
active
RE0297577
ABSTRACT:
A surgical prosthesis or implant for replacing the natural components of a bicondylar joint in a human limb (leg or arm). Thus, a natural knee or elbow joint consists of two pairs of coacting load-bearing condyles. The prosthetic implant has two pairs of coacting male and female condylar components. The male and female components which replace the natural lateral condyles are spherical or spheroidal in shape to simulate a ball and socket joint, while the male and female components which replace the natural medial condyles are constituted by a rib or ridge and a groove. Both the rib and the groove are curved, in a plane normal to the general axis of the limb when straight or extended, to an arc of a circle centered on the center of articulation of the ball and socket, and are also curved in a plane parallel to the limb, the radius of the crest of the rib being less than the radius of the coacting base of the groove. Both male components and both female components can be formed on respective rigid carriers, or they may optionally be separate for individual fixation to the patient's limb.
REFERENCES:
patent: 1421216 (1922-06-01), Habermann
patent: 3506982 (1970-04-01), Steffee
patent: 3696446 (1972-10-01), Bousquet et al.
Vitallum Surgical Appliance Catalog, Austenal Medical Division, Howmet Corp., New York, N. Y. 1964, M.G.H. Femoral Condyle Replacements, p. 62.
"Plastics Aid In Medical Teaching", British Plastics, vol. 21, No. 247, Dec. 1949, pp. 634 and 635.
"Acrylic Prosthesis Replacing Lower End of the Femur For Benign Giant-Cell Tumor" by G. L. Kraft et al., The Journal of Bone & Joint Surgery, vol. 36-A, No. 2, Apr. 1954, pp. 368-374.
"Elbow Reconstruction with a New Prosthesis to Replace the Distal End of the Humerus" by J. S. Barr et al., The Journal of Bone & Joint Surgery, vol. 47-A, No. 7, Oct. 1965, pp. 1408-1413.
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