Piattelli A, Piattelli M, Scarano A, Montesani L
Dental School, University of Chieti, Italy.
Int J Oral Maxillofac Implants. 1998 Jul-Aug;13(4):561-4.
Although they are fortunately rare, implant fractures can cause significant problems for both clinicians and patients. The authors present a light and scanning electron microscopic study of four fractured implants in two patients. Both patients had parafunctional habits (bruxism), hypertrophic masticatory muscles, and wear of occlusal surfaces. The scanning electron microscopic study of the fractured surfaces of all four implants showed the presence of fatigue striations. Bending overload was probably created by a combination of parafunctional forces, bone resorption, posterior location of the implants, and implant diameter.
尽管幸运的是种植体骨折很少见，但它会给临床医生和患者都带来严重问题。作者展示了对两名患者的四个骨折种植体的光学显微镜和扫描电子显微镜研究。两名患者都有副功能习惯（磨牙症）、咀嚼肌肥大和咬合面磨损。对所有四个种植体骨折表面的扫描电子显微镜研究显示存在疲劳条纹。弯曲过载可能是由副功能力、骨吸收、种植体的后部位置和种植体直径共同作用造成的。
