Corrosion behavior of implant coated with different biocompatible material

Aim: implant ology in oral cavity provide a reliable and rather safer solution to replacing missing teeth The aim was to evaluate the corrosion behavior of commercially pure titanium implant samples without coating and with hydroxyapatite, mixture of strontium and hydroxyapatite and titanium oxide and comparison between them through electrochemical polarization tests in 37 0 C Hank's solution. When implant place in bone inside oral cavity became in contact with blood, saliva and body fluid which contain several constituents like chlorine, water, protein, sodium and amino acids act as corrosion environment increase implant corrosion. (13) Surface modification of titanium implant was made to improve osseointegration, reduce corrosion and increase the biocompatibilityof implant material such as acid etching, surface machining, electro polishing, plasma spraying, sandblasting or coating with biocompatible or biodegradable material. In this study surface modification was coating with different type of biocompatible material- (14, 15) The corrosion rate for all sample coating was less than uncoated CP Ti implant as for uncoated 1.254 ·10-2 and for Ti coated with HA 5.586· 10-3 Ti coated with Sr-HA 2.569 · 10-3 and Ti coated with TiO2 1.709 ·10-3 which may be due to the coating layer act as barrier between body fluid and implant surface lead to reduce corrosion. the results was comparable to