Different Processing Methods On The Commonly Used Oral Corrosion Resistance And Mechanical Properties Of Cast Metal Impact Study

Objective:To handle the oral cavity common casting metal(cobalt-chromium alloy,pure titanium,Vitallium2000)with tea polyphenols artificial saliva soaking processing and heat treatment.Analysis of the change of immersion corrosion and mechanical properties of cobaltchromium alloy,pure titanium and Vitallium2000 then discuss the different clinical manifestations of these casting alloy.To provide reference for the selection of the alloy.Methods:Preparation of specimen by uniaxial tensile test standard.Put the cobalt-chromium alloy,pure titanium and Vitallium2000 casting parts into groups.Without any treatment of cobalt-chromium alloy,pure titanium,Vitallium2000 casting soake in 1.25g/L tea polyphenols artificial saliva for group A.Put the cobalt-chromium alloy,pure titanium,Vitallium2000 casting into the artificial saliva after heat treatment for group B.Put the cobalt-chromium alloy,pure titanium,Vitallium2000 casting into the artificial saliva without any treatment for group C.Corrosion of test specimens after bubble test,the surface morphology of casting was observed by scanning electron microscope and with mechanical properties testing.Results:(1)The cast metal specimens after a long-term immersion with obvious corrosion phenomenon,under the scanning electron microscope,there are a lot of scratches on the surface of each specimen.Relative A and B two groups,the control group C group surface scratch disorder,with rough boundary,surface irregularity,pit corrosion,scattered distribution,grinding scratches at the corrosion pits become wider and deeper.Vitallium2000 of group A compared with pure titanium and cobalt-chromium alloy,the corrosion is slight.Compared with B and C two groups,the A group with less corrosion pit,which was added with the tea polyphenol.(2)Cobalt-chromium alloy,pure titanium and Vitallium2000 with heat treatment group and tea polyphenol group than the control group,the corrosion resistance is improved obviously.And there was no significant difference in mechanical properties.Conclusion:(1)Heat treatment can improve the corrosion resistance of cast alloy(cobaltchromium alloy,pure titanium,Vitallium2000),the tensile properties of the alloy are alsoincreased.To provide a good condition for the selection of the alloy for clinical application.(2)Cast alloy(cobalt-chromium alloy,pure titanium,Vitallium2000)after with the treatment of tea polyphenols,their corrosion resistance is improved,but there was no significant effect on the mechanical properties of the alloy.