Topographic Effects of Four Different Beverages to Cu - Sn ( Eta Prime ) Phase Amalgam Surface : A Scanning Electron Microscopic Study

In this study the corroding and/or tarnishing implications of coke, a fizzy soft drink, tea and coffee to the eta prime phase plastic amalgam surface following the filling were evaluated. Thirty six acrylic blocks were prepared which each one was having 5 mm in diameter and 1 mm in depth welts where condensed with amalgam. Those blocks were divided into six groups. The groups were coffee, tea, coke, a fizzy soft drink, water (negative control), and citric acid (positive control). Blocks were immersed into those liquids and were left 5 minutes. Later samples evaluated under SEM (Scanning Electron Microscope). While coke causing mostly pitting corrosion, fizzy soft drink was causing inter granular corrosion, and citric acid caused crack type corrosion. Tea and coffee did not show any effect to topographic structure similar to water to the eta prime phase amalgam.