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Flexure strength of repaired dental composites
Author(s) -
SÖDERHOLM KJ. M.
Publication year - 1986
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/j.1600-0722.1986.tb01775.x
Subject(s) - distilled water , composite material , silane , phosphoric acid , flexural strength , materials science , toluene , composite number , dentistry , chemistry , medicine , chromatography , organic chemistry , metallurgy
— A study was conducted to determine differences in flexure strength between unrepaired and repaired dental composite bars. Four groups, each consisting of 10 samples, were investigated. Group A consisted of unrepaired samples, while groups B‐D consisted of samples which had been cut to lengths of 17.5 mm and repaired to a total length of 35.0 mm. The cut surfaces of these samples were washed with water (group B), treated with phosphoric acid, water and bonding agent (group C), or treated with a silane‐toluene solution (group D) before new material was added. The samples were stored in distilled water at 37°C, and after 3 and 6 months the flexure strength of samples from each group was determined by “four‐point” bending. The results showed that repaired composites were weaker than unrepaired samples. The mean strength of the silane‐toluene treated group was superior in strength to that of the other two groups. This group was also least affected by exposure to water. Of the other two groups, specimens treated with the acid etch technique were superior in strength to the other group.