How does a well-polished metallic dental restoration benefit its longevity?

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Prevents changes in size or shapeReduces heat transfer through the metalStops deformation or bendingMinimizes tarnishing and corrosionEnhances bonding with tooth structure

Explanation

A smooth, highly polished surface on a metal dental restoration significantly lowers the risk of tarnish and corrosion by reducing surface roughness where chemical reactions can initiate. It does not affect dimensional stability, thermal conductivity, or warpage.