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The behaviour of post‐retained core materials supported by coronal tooth structure in vitro
Author(s) -
RUSSELL M. D.,
MASOOD M.,
CUNNINGHAM L.
Publication year - 1997
Publication title -
international endodontic journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.988
H-Index - 119
eISSN - 1365-2591
pISSN - 0143-2885
DOI - 10.1046/j.1365-2591.1997.00108.x
Subject(s) - coronal plane , amalgam (chemistry) , materials science , dentistry , cermet , significant difference , shearing (physics) , tooth fracture , composite material , medicine , chemistry , ceramic , electrode , radiology
Summary This study was designed to investigate the effect of retaining coronal tooth substance on the performance of post‐retained core materials, and to compare the fracture resistance of the system with an intact tooth prepared to similar dimensions. Ten teeth restored with post‐retained silver amalgam, and 10 teeth restored with silver‐glass cermet, all with a retained single wall of coronal tooth substance, were compared with 10 unrestored teeth prepared to similar dimensions when subjected to a shearing load. The results showed no statistically significant difference between the unrestored teeth and those restored with a silver‐glass cermet. Whilst the teeth restored with silver amalgam had a significantly higher fracture resistance ( P > 0.01) there was greater tendency to root fracture.