Influence of the number of sections on reliability of in vitro microleakage evaluations.

Purpose: To test how the number of sections affects the maximum depth of tracer penetration.

Materials And Methods: This study was simultaneously performed in three different centers. C-shaped Class V cavities were made on 60 human third molars.

In vitro push-out strength of seven luting agents to dentin.

Purpose: New luting agents, described as resin-modified glass-ionomer cements and compomers, have been developed during the last decade to improve the retention of cemented restorations. The aims of this study were to (1) compare the push-out strength of these new luting materials against both conventional cements and bonding luting agents, and (2) evaluate the influence of dentin surface treatment on both glass-ionomer cement and 4-META adhesive resin push-out strength.

Materials And Methods: Conical standardized cavities were drilled in the center of coronal dentin disks.