Harris W H, Mulroy R D, Maloney W J, Burke D W, Chandler H P, Zalenski E B
Orthopaedic Biomechanics Laboratory, Massachusetts General Hospital, Boston 02114.
Clin Orthop Relat Res. 1991 May(266):119-26.
High out-of-plane forces acting on the hip joint can produce important rotational micromotion of the femoral component. This micromotion at the prosthesis interface may be detrimental to the stability of the implant. In cementless femoral implants this could prevent bone ingrowth, and in the cemented component this could cause generation of particulate debris, lysis, and loosening. The introduction of the torque wrench micrometer for assessment of intraoperative femoral component stability can quantify the initial stability of primary cementless femoral components and critically evaluate the stability (at either the initial or revision arthroplasty) of both cemented and cementless femoral components. It allows the surgeon to produce a known torque in the direction and magnitude of the out-of-plane forces that load the hip in vivo.
作用于髋关节的高平面外力可导致股骨部件产生显著的旋转微动。假体界面处的这种微动可能对植入物的稳定性不利。在非骨水泥型股骨植入物中，这可能会阻止骨长入；而在骨水泥型部件中，这可能会导致颗粒碎片的产生、骨溶解和松动。引入扭矩扳手测微计来评估术中股骨部件的稳定性，可以量化初次非骨水泥型股骨部件的初始稳定性，并严格评估骨水泥型和非骨水泥型股骨部件在初次或翻修关节成形术中的稳定性。它使外科医生能够在体内加载髋关节的平面外力的方向和大小上产生已知扭矩。
