Fixation device and method of manufacture and use
AssigneeInnovate Orthopaedics Limited
InventorsAndrew Michael Williams, Alexander John Gutteridge
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Abstract
A method and apparatus are disclosed for providing a compression fixation between a first and further component. The apparatus comprises an elongate body having a head end and a tip end and comprising a screw thread including a first region in which the screw thread has a corresponding first pitch and a further region, extending from the tip end, in which the screw thread is tapered and has a corresponding farther pitch that continually decreases away from the tip end.
Claims13
A method of providing a compression fixation via an interference fit between a bone and at least one further component, comprising:
- screwing an elongate body comprising a head end, a tip end and a screw thread into a pre-prepared tunnel in a bone, wherein:
- the elongate body advances at a predetermined initial advancement rate as the tip end is initially screwed into the tunnel, and
- after initially advancing at the initial advancement rate, the elongate body advances at a continually decreasing advancement rate until the elongate body reaches a constant advancement rate;
- wherein a continuous reduction in the continually decreasing advancement rate is provided via a distal tip region of the screw thread, that has a pitch that continuously decreases away from the tip end, and that blends into a central substantially cylindrical region of the screw thread that provides the constant advancement rate and that has a constant pitch.
Dependencies are inferred from the claim text.