Gross M, Abramovich I, Weiss E I
Department of Oral Rehabilitation, Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Israel.
Int J Oral Maxillofac Implants. 1999 Jan-Feb;14(1):94-100.
Microleakage can occur at the abutment-implant (A-I) interface in osseointegrated implants and may cause malodor and inflammation of peri-implant tissues. The degree of microleakage at the A-I interface of 5 implant systems was comparatively assessed at varying closing torques. Using colored tracing probes driven by a 2-atm pressure system, the interface microleakage of Brånemark, Sulzer Calcitek, 3i, ITI, and Steri-Oss implants was determined spectrophotometrically. Microleakage through the A-I interface occurred in all systems, with variability between systems, samples, and closing torques. As closing torque increased from 10 Ncm to 20 Ncm to manufacturers' recommended closing torques, microleakage decreased significantly (P < .005) for all systems. Analysis of variance showed significant interaction between closing torques and the time course of microleakage, and between systems and the time course of microleakage (P < .001). The results indicate that fluids and small molecules are capable of passing through the interface of all the A-I assemblies studied. Presumably in an in situ situation, fluids containing bacterial byproducts and nutrients required for bacterial growth may pass through the interface gap, contributing in part to clinically observed malodor and peri-implantitis.
在骨结合种植体的基台-种植体（A-I）界面可能会发生微渗漏，这可能导致种植体周围组织出现恶臭和炎症。在不同的拧紧扭矩下，对5种植体系统的A-I界面微渗漏程度进行了比较评估。使用由2个大气压系统驱动的彩色示踪探针，通过分光光度法测定了Brånemark、Sulzer Calcitek、3i、ITI和Steri-Oss种植体的界面微渗漏情况。所有系统的A-I界面均发生了微渗漏，不同系统、样本和拧紧扭矩之间存在差异。随着拧紧扭矩从10 Ncm增加到20 Ncm再到制造商推荐的拧紧扭矩，所有系统的微渗漏均显著降低（P < .005）。方差分析显示，拧紧扭矩与微渗漏的时间进程之间，以及系统与微渗漏的时间进程之间存在显著交互作用（P < .001）。结果表明，液体和小分子能够穿过所有研究的A-I组件界面。据推测，在实际情况中，含有细菌副产物和细菌生长所需营养物质的液体可能会穿过界面间隙，这在一定程度上导致了临床上观察到的恶臭和种植体周炎。
