BOND STRENGTH TO DENTIN OF 2 LIGHT-ACTIVATED GLASS POLYALKENOATE (IONOMER) CEMENTS

The effects of sample thickness on the in vitro beyond strength of two light-activated glass polyalkenoate to dentine have been investigated . The buccal and/or lingual surfaces of non-carious human third molar teeth were used for bonding. The tensile bond strengths to dentine of samples of the cements of 0.5 mm, 1.0 mm, 1.5 mm and 2.0 mm were measu red 10 min after bonding. For one of the materials bond strength and r eliability were found to decrease as the sample thickness increased. T he bond strength to dentine of the second material was also affected b y changes in the thickness of the cement but as the bond strengths wer e all very low for this material, any differences are probably of litt le clinical relevance.