| 摘要 |
A differential thread fixation clamp (10) securing a reference frame (50) to an item (800) in combination with a computer aided surgery navigation system (102). A differential thread fixation clamp (10) according to one embodiment applies a wedge force to two pins (20, 22) that are connected to an item. In one embodiment, a controller mechanism (18) includes an internally two-threaded surfaces (240, 260) that engages with two plungers (14, 16) having different externally threaded surfaces (140, 160), applying a pushing force to the pins (20, 22), securing the reference frame (50) in one place for the need of the computer aided surgery navigation system (102). |
