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US 5,718,706 AGranted
Surgical screw and washer
AssigneeHip Developments Pty Ltd.
InventorGregory James Roger
Life of this patent
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AssigneeHip Developments Pty Ltd.
InventorGregory James Roger
Estimating the term…
A surgical fastener for fixation of graft tendon (26) in a bone hole comprising a screw (10) having a head (11), neck (12), and shank (13), and a washer (17) disposed about the neck. The tendon (26) is attached to the washer (17) so as to ensure that the tendon (26) is immobilised between the head (11) of the screw (10) and the wall of the bone hole thereby reducing pistoning under load and reducing graft failure. In one embodiment, the fastener includes a bone plug (38) disposed about the neck (12) of the screw (10) between the head (11) and the washer (17), the neck (12) being adapted to laterally press the bone plug (38) and thereby immobilise a tendon (26) attached to the washer between the bone plug (38) and the wall of the bone hole. In another embodiment, the invention consists in a surgical staple (60) having two substantially parallel legs (61), a transverse head member (62) and a washer (66) which holds a loop of tendon (26) under the staple (60) when it is into a bone.
A surgical fastener for attaching one end of a graft tendon to a bone, the bone having a hole formed therein to receive the surgical fastener, the surgical fastener being a screw having a head, a neck and a shank with an end distal the head, the shank having a thread formed along at least a portion of its length with the thread having no cutting line along its crest, the head being generally hemispherical and of a diameter greater than the shank, and an annular washer being disposed about the neck of the screw intermediate the head and the shank, wherein the washer is arranged such that in operation the one end of the tendon can be attached thereto and substantially immobilized between the head and the inside of the hole.
The surgical fastener of claim 5 wherein the washer has four holes in its annular portion, the four holes being confined to one half of the annular portion.
A method for attaching one end of a tendon to a bone using a surgical fastener comprising a screw having a head, a neck and a shank with an end distal the head, the shank having a thread formed along at least a portion of its length, the head being generally hemispherical and of a diameter greater than the shank, and an annular washer being disposed about the neck of the screw intermediate the head and the shank, the method comprising the steps of:
Dependencies are inferred from the claim text.