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An in vitro study of marginal leakage associated with composite restorations using an acidified agar technique
Author(s) -
GRIEVE A. R.,
GLYNJONES J. C.
Publication year - 1980
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1111/j.1365-2842.1980.tb00438.x
Subject(s) - bevel , leakage (economics) , composite number , materials science , phosphoric acid , composite material , dentistry , medicine , structural engineering , metallurgy , engineering , economics , macroeconomics
Summary The marginal leakage associated with a composite restorative material was examined using an in vitro method for the production of secondary caries‐like lesions after the restorations had been subjected to thermal cycling. The fillings were placed in cavities with a 90° cavo‐surface angle with and without etching of the walls with phosphoric acid and in cavities with a bevelled margin which were also acid etched. Some degree of leakage was demonstrated in 95% of the unetched cavities while approximately half of the restorations in etched unbevelled cavities showed leakage. With the bevelled and etched group virtually no leakage occurred.