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Marginal fit of porcelain and indirect composite laminate veneers under in vitro conditions
Author(s) -
HARASANI MUNIR H.,
ISIDOR FLEMMING,
KAABER SVEND
Publication year - 1991
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.1600-0722.1991.tb01894.x
Subject(s) - veneer , composite number , molar , materials science , dentistry , composite material , medicine
– The purpose of the present study was to compare the marginal adaptation of indirect composite and porcelain veneers in vitro using transmitted‐light microscopy. A preparation with a marginal chamber finish for a veneer was performed on 10 extracted molars after which 5 composite and 5 porcelain veneers were made and fitted using self‐ and light‐cured microfill composite resin. Three longitudinal and 3 horizontal sections were cut in each preparation with a diamond saw and were ground to a thickness of approximately 150 μm and investigated under the light microscope. Although the absolute marginal discrepancy at the cervical location had the highest statistical significance in the composite veneer group, the composite and porcelain veneers, in general, demonstrated a similar absolute marginal discrepancy and thickness of luting agent with average values from 50 μm to 195 μm for the two parameters. A considerable amount of excess of luting agent was furthermore observed in both groups of veneers, being most pronounced in the composite veneers.