| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus to aid removal of a prosthetic implant cemented into bone.SOLUTION: An apparatus to aid removal of a prosthetic implant cemented into bone comprises: an adapter 55 to engage a proximal end 9 of an implant 2; a clamp screw 56 to hold the engaged end 9 to the adapter 55 in good acoustic contact; a generator for torsional or longitudinal mode ultrasonic vibrations; and a coupling link 61 to transmit the ultrasonic vibrations to the adapter means 55 and thence to the implant 2. The proximal end 9 of the implant 2 is gripped between a conical tip 57 of the clamp screw 56 and a raised portion 41 of the adapter 55 to avoid damping flexural mode oscillations induced in the implant. |
