Abstract: A safety needle comprising a handle; a hollow needle; a trigger carriage; an obturator; a spring; a trigger; a first latch and a second latch; the first latch, second latch and trigger being configured so that when the trigger carriage is in a distal position and the first latch set, and the trigger is thereafter pulled proximally, the first latch is released and the trigger carriage moves proximally into a proximal position, and thereafter releasing the trigger causes the trigger carriage to move into an intermediate position and set the second latch; and further wherein, when the trigger carriage is in its intermediate position and the distal end of the obturator engages tissue, the trigger carriage is moved proximally so as to release the second latch.

Abstract: A microfracture instrument for applying microfracture therapy to a bone, the microfracture instrument comprising: an elongated shaft comprising a distal end and a proximal end; a needle comprising a body terminating in at least one sharp point, the needle being movably mounted to the distal end of the shaft for movement between an extended position for engaging the bone with the at least one sharp point of the needle and a retracted position for withdrawing the at least one sharp point of the needle from the bone; and a drive shaft movably mounted to the elongated shaft, the drive shaft being connected to the body of the needle so that movement of the drive shaft relative to the elongated shaft moves the needle between its extended position and its retracted position.