Corrosion behavior of implant coated with different biocompatible material

Abstract

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. Materials and methods: coating commercially pure titanium implant by Electrophoretic deposition technique (EPD) with three types of the coating materials (HA, Tio2 and mixture of 50% HA and 50% Sr) and fourth group without coating. The sample exposed to Hank's solution prepared in the laboratory electrochemical corrosion test was done when polarization potential, corrosion rate and the open circuit potential of the samples were measured. Results: The corrosion rate indicated that is significantly higher for uncoated Cp Ti. The three types of coating significantly reduced the corrosion rate in compared Cp Ti while the sample coated with TiO2 has the minimum corrosion (1.709 × 10-3 mm/y) rate. Conclusions: the corrosion rate of Cp Ti coating significantly decreased, the best coating to reduce corrosion of implant is titanium oxide coating. Clinical significance: Resistance to corrosion is critically important for dental materials because corrosion can lead to roughening of the surface, weakening of the restoration, liberation of elements from the metal or alloy, and toxic reactions. Coating might have potential in reduction corrosion dental implant. Further studies to improve surface characteristics of implant are recommended.