An implant system and apparatus configured to permit motion of the wrist in at least one physiological direction, as well as in a dart thrower's motion, and constrain motion of the wrist in at least one non-physiological direction are provided. The implant according to one embodiment includes a distal...http://www.google.ca/patents/US7914583?utm_source=gb-gplus-sharePatent US7914583 - Wrist implants
