A detachable actuator arm as part of or in combination with an osteogenesis distractor device, the actuator arm being detachable from the distraction mechanism of the distractor device by manipulation of a proximally disposed release mechanism. A detachable actuator arm is provided as part of an osteogenesis distractor device or in combination with an osteogenesis distraction device, the actuator arm being structured such that its proximal end is configured to mate with a drive tool such that the arm may be rotated when needed, with the distal end of the arm being structured such that the arm is mated in lockable manner with the operative distraction mechanism of the distractor main body.
