1979-03-19
1980-04-22
Frinks, Ronald L.
Surgery
Truss
Pad
128 92C, A61F 124
Patent
active
041987128
ABSTRACT:
A flexible implant for replacing the scaphoid bone of the wrist includes a one-piece body of resilient material. The body defines an inferior surface of slightly convex and oval shape with the apex of the surface lying in substantially a single plane and defining a trapezium articulate facet and a trapezoid articulate facet. A stabilizing stem extends outwardly from the inferior surface and generally perpendicular thereto. The body further defines a superior surface having a smooth, slightly convex shape and being adapted to articulate with the radius. An internal surface defined by the body has a lunate articular facet and a deep concavity, the latter adapted to articulate with the capitate. An external surface of generally smooth and convex shape is bounded by the inferior surface and the superior surface and defines a dorsal edge of the internal surface concavity. A posterior surface extends between the external surface and the proximal edge of the lunate articular facet. An anterior surface of generally triangular shape is bounded by the lunate facet, the deep concavity and the superior surface.
REFERENCES:
patent: 3879767 (1975-04-01), Stubstad
patent: 3924276 (1975-12-01), Eaton
"Silicone Rubber Implants for Replacement of Arthritic or Destroyed Joints in the Hand," by A. B. Swanson, Surgical Clinics of North America, vol. 48, No. 5, Oct. 1968, pp. 1113-1127.
Flexible Implant Resection Arthroplasty in the Hand and Extremities (Book) by Alfred B. Swanson, Published 1973, pp. 1-6, 15, 16, 30, 31 and 240-253.
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