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Interfacial gaps of resin cemented ceramic inlays
Author(s) -
Sorensen John A.,
Munksgaard Erik Christian
Publication year - 1995
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.1600-0722.1995.tb00128.x
Subject(s) - inlay , materials science , composite material , shrinkage , ceramic , dentin , cement , composite number , polymerization , polymer
A method was developed for measuring presence, location and extent of interfacial contraction gaps of resin‐cemented ceramic inlays in dentin cavities. Cylindrical ceramic inlays were cemented using one of 12 commercially available resin composite cements to make film thickness of 200‐μm. Cross‐sections revealed absence of marginal gaps but contraction gaps occurred at all dentin‐cement interfaces at the cavity floors and ranged from 1.6 to 7.1 μm. This was equivalent to 0.8‐3.5% of the cement film thickness and was 3‐10 times greater than the wall‐to‐wall contraction in percent observed when resin composites are used as filling materials in 3‐5 mm butt‐joint dentin cavities. The results support the theory that contraction gaps developing adjacent to thin films of resin cements reach size equivalent to the cement film thickness multiplied by the volumetric polymerization shrinkage of the cement.