치과용 어버트먼트 나사의 다양한 전해액에서 부식거동

Abstract

Titanium and its alloy have been widely used in dental abutment screw. Estimation of electrochemical stability of dental abutment screw in various electrolytes have been researched by using electrochemical methods. Dental abutment screw was used for corrosion test in 0.9% NaCl, artificial saliva, and simulated body fluids. The surface morphology were observed using field emission scanning electron microscopy (FE-SEM) and energy dispersive x-ray spectroscopy(EDX). The electrochemical stability of abutment screw was investigated using potentiostat (EG&G Co, 263A). The corrosion surface of abutment screw were observed using field emission scanning electron microscopy(FE-SEM).

The results were as follows: 1. All abutments showed the mechanical defects and scratch in the screw surface and degree of surface roughness of A, B and C samples was lower than that of D and E ones. 2. From the results of potentiodynamic test in various solution, the current density of C sample tested in SBF and AS solution was lower than that of D and E sample tested in 0.9% NaCl solution.

3. The current density of all samples tested in SBF and AS solution showed similar values, whereas, the current density of all samples tested in 0.9% NaCl solution showed higher than that of SBF and AS solution.