Analysis of the tensile bond strength using different light-curing sources and filled adhesives systems

Abstract

This study tested the influence of the presence of filler in adhesives systems and of type of curing unit in the bond strength between dentin and resin, using Single Bond™, Optibond Solo Plus™ and Prime Bond NT™ adhesive systems. Thirty human teeth (molars) were selected and then cut in half in the mesio-distal’s sense. The vestibula and lingual parts were used and the sound dentin was ground exposed. Two types of curing units were used (halogen and LED). Resin cylinders were produced using the assembly aparratus and the tensile bond strength test was performed at a cross-head speed of 0,5 mm/min. The mean values were: Single Bond™/Halogen – 9,9 Mpa; Single Bond™/LED – 10,5 Mpa; Prime Bond NT™/Halogen – 9,7Mpa; Prime Bond NT™/LED – 8,7 Mpa; Opti Bond Solo Plus™/Halogen – 12,2 Mpa; and Opti Bond Solo Plus™/LED – 5,9 Mpa. Two Way ANOVA statistical analysis showed no significantly difference between the groups tested. Within the limits of this study can be concluded that neither the type of light and neither the presence of filler content influenced the mean bond strength values between dentin and composite resin. Key words: dental materials, adhesive systems, LED (light-emitting diode), halogen