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Quintessence International
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Quintessence Int 22 (1991), No. 9     1. Sep. 1991
Quintessence Int 22 (1991), No. 9  (01.09.1991)

Page 745-752


The effect of storage and thermocycling on the shear bond strength of three dentinal adhesives
Carracho / Chappell / Glaros / Purk / Eick
The purpose of this investigation was to evaluate the effects of time of storage and thermocycling on the shear bond strength of three dentinal adhesives. The shear bond strength of Mirage Bond was signficantly greater than that of Scotchbond 2, which was significantly greater than that of Scotschbond Dual Cure (P <- .05). Thermocycling signficantly lowered the shear bond strength of Scotchbond Dual Cure and Scotchbond 2, but not that of Mirage Bond (P <- .05). Time of storage did not affect the shear bond strength of the other adhesives, but Mirage Bond had a significantly greater shear bond strength after 1 month of storage (P <- .05). Scanning electron microscopic observations showed that the fracture patterns were all at the smear layer-adhesive interface for scotchbond Dual Cure, the majority of the fractures were at the primer-adhesive interface for Scotchbond 2, and most of the fractures were cohesive in the bonding agent for Mirage Bond.