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Temperature and humidity: significant factors in resin/enamel bonding
1Division of Restorative Dentistry, School of Dentistry, Belfast, Northern Ireland, UK.
Abstract:
This study examined the effects of temperature and humidity variations on the bond strength of sand blasted Ni-Cr-Mo alloy (Talladium) cylinders cemented to etched bovine enamel using composite resin (Panavia Ex). Bonding was carried out in a humidity chamber under varying combinations of temperature (24 degrees C and 37 degrees C), and relative humidity (32% and 85%). After storage in water at 37 degrees C for 24 hours all specimens were shear tested to failure. The results showed that bond failure was consistently cohesive with resin shear strength at 37 degrees C being significantly reduced by high humidity. At 24 degrees C, resin shear strength was not significantly affected by humidity variations.
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