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Primary Examiner: Frinks, Ronald L.
Assistant Examiner:
Attorney: Haight & Huard

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Title: Surgical implant spinal staple

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Claims: What I claim is:

1. A metal spinal staple substantially U-shaped in side view and capable of securing a pair of metal tensioning cables to a vertebra via spinal screws, which comprises:

a pair of substantially parallel, perpendicularly offset laminar legs having free ends which are bevelled on the outer surfaces to terminate in a wedge shape, the parallel distance between said legs being such as to fit snugly over either side of a vertebra;

an integral, substantially solid and rectangular laminar bridge portion extending perpendicularly between the diagonally opposed bases of said legs along its length, having a width greater than the width of each leg and having curved corners between said legs; and

a pair of diagonally opposed spinal screw receiving apertures formed in said bridge portion proximate to said curved corners such that a line joining the centers of said apertures is inclined with respect to a line joining the centers of said legs in the plane of the bridge portion.

2. An implant as claimed in claim 1, wherein the bridge portion is slightly convex in shape as viewed from the side thereof remote from the legs.

3. An implant as claimed in claim 1, wherein the bridge portion has a width that is two to three times the width of each leg.

4. An implant as claimed in claim 1, wherein the legs and the bridge portion each have a thickness of substantially 1 mm.

5. An implant as claimed in claim 1, wherein the distance between the insides of the two legs is from 20 to 30 mm.

6. An implant as claimed in claim 1, which is made of titanium.

Other info:

Inventors: Hall, John Emmett (Boston, MA, US)

Application Number: 680233
Filing Date: 1976-04-26
Publication_date: 1977-09-13
Assignee: Downs Surgical Limited (Mitcham, EN)
Primary Class(es): 606/61 411/471, 411/920
Other Classes:
US Patent Ref:

2489870	Nov, 1949	Dzus	128/92.
3693616	Sep, 1972	Roaf et al.	128/69.

Other Refs: Other References: Mario M. Stone Table Staple, Richards Mfg. Co. Orthopedic and Instruments (catalog), Memphis Tenn., 1966, p. 115.
Mario M. Stone Table Staple, Orthopedic Catalog, Richards Mfg. Co., Inc., Memphis Tenn., Copyright 1974, Effective Price List of Nov. 15, 1974, p. 72.
"A New Surgical Approach for Correcting the Scoliotic Spine Using a Tensioned Cable Secured to the Convex Curve of the Affective Vertebrae" by A. F. Dwyer, Advertisement p. 57, The Journal of Bone & Joint Surgery, vol. 53A, No. 2, Mar. 1971.