Effect of temperature, humidity and type of tooth on the tensile bond strength to dentin of glass ionomer cements

Abstract

We investigated the effect of temperature and humidity on the tensile bond strengths (TBS) to human and bovine dentin for a conventional and two light-activated glass ionomer cements (L-GIC). With Glas Ionomer-F and Vitremer, very low TBS was obtained even when the adherent was dry, irrespective of the adherent. With Fuji Ionomer Type II LC, high TBS was obtained with wet human dentin. Higher TBS was obtained at 32O℃ and 92% ralative humidity than in room temperature. We found that the TBS between L-GIC and dentin was influenced by the type of adherent and the moisture on it, as well as by the temperature and humidity during the bonding procedure.