Supreme distracter

Details Supreme distracter Supreme distracter

2005-06-21

2005-06-21

Robert, Eduardo C. (Department: 3732)

Surgery

Instruments

Orthopedic instrumentation

Reexamination Certificate

active

06908467

ABSTRACT:
A fixation device for internally or externally fixing fractures comprising at least one nitinol wire having an S-shaped section and two ends wherein each of said two ends forms a hook for hooking into a bone section of a fractured bone. This device can be made from nitinol which has a transformation temperature between 25° C. and 35° C. In addition, this device can have a diameter between 0.6 mm and 5 mm. The device can be inserted using the following process which starts by cooling the wire below a transfer temperature such that the nitinol wire forms in a martensite state. Next, the nitinol wire is inserted into a interphalangeal bone underneath a patients skin. Next, the nitinol wire to heats up inside a patients body above the transfer temperature. Finally, the wire transforms wire from a martensite state to an austenite state wherein when the nitinol wire elongates in a longitudinal direction to generate a distraction force.

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“Design and biomechanical study of internal fixation devices for difficult phalangeal fractures” by Wing-yuk IP et al. A thesis submitted for the Degree of Master of Surgery, The University of Hong Kong, Oct. 2002.

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