Hayakawa Tohru, Kiba Hideo, Yasuda Seijirou, Yamamoto Hirotsugu, Nemoto Kimiya
Department of Dental Materials, Nihon University School of Dentistry at Matsudo, Chiba, Japan.
Int J Periodontics Restorative Dent. 2002 Apr;22(2):164-71.
This study analyzed the interfacial human bone response to retrieved implants that had been functionally loaded in the human environment. A solid-screw titanium plasma-sprayed (TPS) implant was removed 5 years after implantation because of a fracture at the joint between the implant and the crown. A sand-blasted acid-etched titanium implant (SLA) was used as an anchorage for orthodontic treatment. At the end of the treatment, the SLA implant was removed. Both types were functionally loaded without any symptoms expressed by the patients. Histology showed bone contact between the TPS or the SLA implant and surrounding bone, but the SLA implant revealed much more interfacial bone contact. The contact microradiograms showed that the bone surrounding the TPS and SLA implants was highly calcified. The measured percentage of bone-implant contact around the SLA implant was significantly higher (P <.05) than that around the TPS implant.
本研究分析了在人体环境中功能负载后取出的种植体的界面骨反应。一枚实心螺纹钛等离子喷涂（TPS）种植体在植入5年后因种植体与牙冠连接处骨折而被取出。一枚喷砂酸蚀钛种植体（SLA）用作正畸治疗的支抗。治疗结束时，取出SLA种植体。两种种植体均进行了功能负载，患者均未表现出任何症状。组织学显示TPS或SLA种植体与周围骨之间有骨接触，但SLA种植体显示出更多的界面骨接触。接触式显微放射照片显示，TPS和SLA种植体周围的骨高度钙化。测量的SLA种植体周围骨-种植体接触百分比显著高于TPS种植体周围（P<.05）。
