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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Surface analysis of failed oral titanium implants.
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Surface analysis of failed oral titanium implants.

机译：失败的口腔钛植入物的表面分析。

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The aim of the present study was to investigate the surface topography, composition, and oxide thickness of consecutively failed, oral Branemark implants in order to determine possible causes for failure. The failure criterion was lack of osseointegration manifested as implant mobility. Ten implants were retrieved before loading (early failures) and 12 during a period of function up to 8 years (late failures). At retrieval, early losses did not display any clinical sign of infection. All late failures were radiographically characterized by peri-implant radiolucency and did not show infectious signs with one exception. No implant seemed to be lost due to peri-implantitis (plaque-induced progressive marginal bone loss). Twelve implants were analyzed by scanning electron microscopy (SEM), Auger electron spectroscopy (AES), and depth profiling using a blind protocol. Two pristine fixtures, which underwent the same preparation as the failed implants, were used as controls. In the SEM, control samples were essentially free from macroscopic contamination, whereas failed implants contained varying amounts of tissue residues. AES showed that all surfaces consisted of Ti oxide and varying amounts of additional elements, with C dominating in most cases. Nitrogen and sometimes Na, Ca, P, Cl, S, and Si were detected. The Si contamination was most likely due to ion leaching from the glass vials used for storage. Depth profiles showed a typical oxide thickness of 5-8 nm for all samples. In conclusion, no significant changes in the oxide layer composition or thickness as a result of implantation were observed. The results do not indicate any material-related cause for the failures of these implants. Possible reasons for these failures were impaired healing, asymptomatic infection, and overload. Copyright 1999 John Wiley & Sons, Inc.
机译：本研究的目的是研究连续失败的口腔Branemark植入物的表面形貌，组成和氧化物厚度，以确定可能的失败原因。失败的标准是缺乏骨整合，表现为植入物移动性。在加载之前（早期失败）取回了10个植入物，在长达8年的功能期内（晚期失败）取回了12个植入物。取回时，早期损失并未显示出任何临床感染迹象。所有晚期失败的影像学特征均是种植体周围的透亮性，除了一个例外，没有显示出感染迹象。似乎没有植入物因植入物周围炎（斑块引起的进行性边缘性骨丢失）而丢失。通过扫描电子显微镜（SEM），俄歇电子能谱（AES）和使用盲协议的深度分析对十二个植入物进行了分析。对照使用了两个原始的固定装置，它们与失败的植入物进行了相同的准备。在SEM中，对照样品基本上没有肉眼可见的污染，而失败的植入物则含有不同数量的组织残留物。 AES表明，所有表面均由氧化钛和不同数量的附加元素组成，大多数情况下C占主导地位。检测到氮，有时检测到Na，Ca，P，Cl，S和Si。硅污染很可能是由于从用于存储的玻璃小瓶中浸出的离子所致。深度曲线显示所有样品的典型氧化物厚度为5-8 nm。总之，没有观察到由于注入导致的氧化物层组成或厚度的显着变化。结果没有表明这些植入物失败的任何与材料有关的原因。这些失败的可能原因是愈合不良，无症状感染和超负荷。版权所有1999 John Wiley＆Sons，Inc.

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