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1 Colleges of Engineering and Dentistry, University of Kentucky, Lexington, Kentucky
Metallographic examination of amalgam restorations in extracted teeth revealed two types of corrosive attack: (1) surface conversion of
2 to yield
SnO2 and Sn S3 as bulk deposits, beneficial in sealing and anchoring the restoration and (2) a branchlike cracking through
1 of the margins, associated with guttering.
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