Limb-shortening deformities and bone segmental defects are among the most difficult challenges faced by patients and orthopaedists. Foster-Miller is developing a fully implantable bone lengthening/transport system that will have a major impact on treatment protocols for such cases.

The new method will eliminate the pain, scars, contractions, and risk of infection associated with traditional techniques. The miniature device features an intramedullary rod fixation and a single traction cable actuator. A shape memory alloy is used to convert battery power to mechanical motion in a distraction cable. The incremental movement of the cable stimulates bone growth through a process known as distraction osteogenesis. The device also features an integral miniature battery and uses radio technology so that a physician can program the device across a patient's skin, making it completely implantable.

This device is being developed in collaboration with The Cleveland Clinic Foundation and supported by grants from the National Institutes of Health.

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