Vaderhobli R, Saha S
Department of Preventive and Restorative Dentistry, University of California-San Francisco, School of Dentistry, San Francisco, CA 94143, USA.
J Long Term Eff Med Implants. 2007;17(4):281-8. doi: 10.1615/jlongtermeffmedimplants.v17.i4.10.
Functional impairment affecting the quality of life results when a wide range of both muscular and joint pathologies affect the temporomandibular joint (TMJ). Alloplastic reconstruction of joints using Christensen metal TMJ implants have been used since the 1960s for many such patients. To ensure the longevity of such TMJ prostheses, the wear rate of such implants should be minimal. Because surface roughness is an important factor that influences the wear rate, in this study we measured the surface roughness of the condylar and the fossa elements of the new and retrieved Christensen metal TMJ prostheses using the noncontacting optical interferometer (ZYGO-New View 5000). The roughness parameters of the retrieved specimens were statistically higher (p < 0.05) than those for the new specimens, but were less than the retrieved metal total knee implants as reported in the literature.
当多种肌肉和关节病变影响颞下颌关节（TMJ）时，会导致影响生活质量的功能障碍。自20世纪60年代以来，许多此类患者都使用克里斯滕森金属TMJ植入物进行关节异体重建。为确保此类TMJ假体的使用寿命，此类植入物的磨损率应降至最低。由于表面粗糙度是影响磨损率的一个重要因素，在本研究中，我们使用非接触式光学干涉仪（ZYGO-New View 5000）测量了新型和回收的克里斯滕森金属TMJ假体髁突和关节窝部件的表面粗糙度。回收标本的粗糙度参数在统计学上高于新标本（p < 0.05），但低于文献报道的回收金属全膝关节植入物。
