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Quintessence International



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Quintessence Int 22 (1991), No. 12     1. Dec. 1991
Quintessence Int 22 (1991), No. 12  (01.12.1991)

Page 979-983

Dentinal bond strengths and microleakage of a 4-META adhesive to amalgam and composite resin
Cooley / Tseng / Barkmeier
A 4-META-containing adhesive was evaluated for its ability to bond a composite resin and two types of amalgam to dentin. One group of composite resin was tested after 24 hours and another group after 24 hours of thermocycling. Shear bond strengths were: composite resin at 24 hours = 22.38 MPa; thermocycled composite resin = 20.86 MPa; spherical alloy = 3.38 MPa; admixed alloy = 3.84 MPa. Microleakage was evaluated after the 4-META adhesive was appli ed to cavity preparations and compared to that of a group treated with a cavity varnish. There was statistically significantly less microleakage in the 4-META group at both the occlusal and gingival margins