Orthopaedic ligament fixation system
First Claim
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1. A ligament fixation system comprising:
- a screw member, said screw member comprising a shank having;
a proximate end and a remote end;
a threaded external surface having threads with an atraumatic profile;
at least one longitudinal slit; and
a threaded longitudinal bore; and
an expansion member, said expansion member comprising a threaded shaft for engagement of the threaded longitudinal bore;
wherein insertion of the expansion member into the threaded longitudinal bore causes radial expansion of the screw member.
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Abstract
A ligament fixation system comprising an expandable screw (11) with an atraumatic thread. The screw is expanded by insertion of an expansion screw (12) into a threaded longitudinal bore of the expandable screw to cause radial expansion of the screw. The system includes an insertion tool (32) having an outer sleeve (33) for insertion of the expandable screw and an inner relatively rotatable member (39) for insertion of the expansion screw. The tool includes a torque gauge. The invention extends to methods of fixing a tendon graft in a bone tunnel.
227 Citations
31 Claims
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1. A ligament fixation system comprising:
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a screw member, said screw member comprising a shank having;
a proximate end and a remote end;
a threaded external surface having threads with an atraumatic profile;
at least one longitudinal slit; and
a threaded longitudinal bore; and
an expansion member, said expansion member comprising a threaded shaft for engagement of the threaded longitudinal bore;
wherein insertion of the expansion member into the threaded longitudinal bore causes radial expansion of the screw member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method of fixing a ligament within a bone tunnel comprising the steps of:
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locating an end region of a tendon graft in a bone tunnel;
screwing a screw member into place between the end region of the tendon graft and a side wall of the bone tunnel;
screwing an expansion member into a threaded bore of the screw member to thereby provide radial expansion of the screw member and subsequent urging of the end region of the tendon graft into close contact with the wall of the bone tunnel. - View Dependent Claims (28, 29, 30, 31)
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Specification