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Quintessence International
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Quintessence Int 23 (1992), No. 5     1. May 1992
Quintessence Int 23 (1992), No. 5  (01.05.1992)

Page 355-362


In vitro evaluation of dentinal bonding agents in mixed Class V cavity preparations
Airoldi / Krejci / Lutz
The effect of ten dentinal bonding agents on composite resin restorations was tested in mixed Class V cavity preparations. The marginal quality of the restorations was quantified under a scanning electron microscope before and after thermocycling. In addition, the marginal seal was semiquantitatively evaluated with a dye penetration technique. Marginal adaptation in dentin was poor in seven test groups. Three products showed values of excellent margin in dentin exceeding 50% after thermocycling. Furthermore, some dentinal bonding agents had a deleterious effect on marginal adaptation to the etched enamel surfaces.