Chaturvedi Thakur Prasad, Dubey Ram Sagar
Department of Orthodontics, IMS, BHU, Varanasi, UP, India.
Indian J Dent Res. 2012 Jul-Aug;23(4):479-83. doi: 10.4103/0970-9290.104953.
Teeth and restorations are subjected continuously to degradation in hostile physical and chemical environments, resulting in corrosion. Component of liquid or solid is an important factor influencing the corrosion of metallic appliances placed in the oral cavity.
To study in vitro corrosion of titanium wires immersed in solutions of toothpaste and chocolate in artificial saliva.
Immersion test and electrochemical studies using different parameters, including corrosion potential (E corr ), cathodic Tafel constant (βc), anodic Tafel constant (βa), corrosion current (I corr ), polarization resistance (R p ), and corrosion rate of titanium wires, were done in solutions of artificial saliva containing Colgate™ toothpaste and Amul™ chocolate. Photomicrographs were also taken.
The results showed degradation of titanium wires by electrochemical attack when they were placed in the hostile electrolytic environments provided in the experiments. Surface analysis of titanium wires showed pitting and localized attacks on the surface. Pitting corrosion was found in the titanium wires.
牙齿及修复体持续处于恶劣的物理和化学环境中，会发生降解，进而导致腐蚀。液体或固体成分是影响口腔内金属器械腐蚀的一个重要因素。
研究浸泡在人工唾液中牙膏和巧克力溶液里的钛丝的体外腐蚀情况。
在含有高露洁™牙膏和阿穆尔™巧克力的人工唾液溶液中，使用不同参数（包括腐蚀电位（E corr）、阴极塔菲尔常数（βc）、阳极塔菲尔常数（βa）、腐蚀电流（I corr）、极化电阻（R p）以及钛丝的腐蚀速率）进行浸泡试验和电化学研究。还拍摄了显微照片。
结果表明，当钛丝置于实验所提供的恶劣电解环境中时，会受到电化学侵蚀而降解。钛丝的表面分析显示表面存在点蚀和局部侵蚀。在钛丝中发现了点蚀。
