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Discoloration Mechanism of Dental Titanium and Titanium Alloys

牙科钛及钛合金的变色机理

基本信息

批准号：
13470420
负责人：
ODA Yutaka
金额：
$ 4.67万
依托单位：
TOKYO DENTAL COLLEGE
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13470420/
关键词：
Titanium Discoloration Electrochemical Corrosion Denture cleaner Titanium alloy

项目摘要

In recent years, titanium prosthetics have been widely used in clinical dentistry. However, there are reports that titanium plates were discolored by some denture cleaner. This study investigated the cause. of discoloration by measuring the pH of denture cleaners and by surface analysis of discolored specimens using EPMA and XPS. Severe discoloration was observed with denture cleaners with a highly alkajine range. Discoloration was regarded as due to roughness caused by corrosion. The degree of discoloration depended on the thickness of the oxide film. The role of albumin on the corrosion behavior of titanium in a solution containing fluoride was elucidated. The corrosion of titanium in a solution containing fluoride was distinct, and that adding albumin to the solution containing fluoride suppressed corrosion. Fluorine was detected on the titanium surface immersed in the solution containing fluoride, and dissolution of the titanium was confirmed. The titanium immersed in a solution co … More ntaining both fluoride and albumin had an albumin film regardless of the albumin concentration. In addition, the amount of dissolved titanium from the titanium immersed in the solution was less than when the solution contained no albumin. It was suggested that the formation of adsorbed albumin films on in the passive film acted to not only protect the titanium from attack by the fluoride but also suppressed dissolution of the titanium-fluoride compounds.Peroxide, which is produced by inflammatory cells, and fluoride prophylactic agents are two possible causes for the discoloration of titanium and titanium alloys. This study compared differences of the discoloration of several titanium alloys caused by peroxide and fluoride solutions. The rates of discoloration were different with the two solutions. The color difference was higher for Ti-Ni and Ti-Cu than for other alloys with H202. In contrast, these alloy showed only a slight change in the fluoride solution. This data implies that the rate of corrosion of titanium alloys is different for solutions containing peroxide than those containing fluoride. Less

近年来，钛修复体在口腔临床中得到了广泛的应用。然而，有报告称钛板被某些义齿清洁剂变色。这项研究调查了原因。通过测量义齿清洁剂的pH值和使用EPMA和XPS对变色样品进行表面分析，使用高碱性范围的义齿清洁剂观察到严重变色。变色被认为是由于腐蚀引起的粗糙度。变色的程度取决于氧化膜的厚度。阐述了白蛋白对钛在含氟溶液中腐蚀行为的影响。钛在含氟溶液中腐蚀明显，在含氟溶液中加入白蛋白可抑制腐蚀。在浸渍在含氟溶液中的钛表面上检测到氟，并且确认钛的溶解。将钛浸入溶液中， ...更多信息无论白蛋白浓度如何，同时含有氟化物和白蛋白的组合物都具有白蛋白膜。此外，从浸入溶液中的钛中溶解的钛的量小于当溶液不含白蛋白时的量。结果表明，在钝化膜上形成的吸附白蛋白膜不仅保护钛免受氟化物的侵蚀，而且抑制了钛-氟化物化合物的溶解，炎症细胞产生的过氧化物和氟化物预防剂是钛和钛合金变色的两个可能原因。比较了几种钛合金在过氧化物和氟化物溶液中变色的差异。两种溶液的变色速率不同。Ti-Ni和Ti-Cu的色差高于具有H2 O2的其它合金。相反，这些合金在氟化物溶液中仅显示出轻微的变化。该数据表明，含过氧化物溶液的钛合金腐蚀速率不同于含氟化物溶液。少