Zimmerman M C, Meunier A, Katz J L, Christel P, Sedel L
Laboratoire de Recherches Orthopédiques-Faculté de Médecine, Paris, France.
J Orthop Res. 1989;7(4):607-11. doi: 10.1002/jor.1100070420.
Total hip arthroplasty causes biomechanical changes in the normal femur, including a redistribution and concentration of stress. These mechanical alterations in the femur cause local remodeling and resorption that affect the geometry and mechanical properties of the bone. Two complementary ultrasonic techniques were used to study the local adaptive remodeling of bone due to prosthesis implantation. An ultrasonic wave propagation technique was used to determine elastic properties and a new scanning acoustic microscope (SAM) mapped the acoustic impedance profile of each section. The effects of the implantation of two types of hip prostheses, an uncemented bipolar prosthesis with an Austin-Moore type stem and a cemented Charnley prosthesis, were investigated. Both prostheses had a detrimental effect on local elastic properties as determined by acoustic velocity measurements. The SAM system provided information about local inhomogeneities in bone properties not obtainable by any other means. The acoustic impedance maps highlighted bone resorption and bone remodeling on a microstructural level.
全髋关节置换术会导致正常股骨发生生物力学变化，包括应力的重新分布和集中。股骨的这些力学改变会引起局部重塑和吸收，从而影响骨骼的几何形状和力学性能。使用了两种互补的超声技术来研究假体植入后骨骼的局部适应性重塑。一种超声波传播技术用于确定弹性特性，一种新型扫描声学显微镜（SAM）绘制了每个截面的声阻抗分布图。研究了两种类型髋关节假体植入的影响，一种是带有奥斯汀-摩尔型柄的非骨水泥双极假体，另一种是骨水泥型查尔尼假体。通过声速测量确定，两种假体对局部弹性特性都有不利影响。SAM系统提供了通过其他任何方法都无法获得的有关骨骼特性局部不均匀性的信息。声阻抗图在微观结构水平上突出显示了骨吸收和骨重塑。
