Orthodontic adhesives versus anterior restorative materials for bracket bonding.

Two hundred and forty Begg orthodontic brackets prewelded to a Dyna-Bond pad were bonded to bovine incisors using four orthodontic adhesives and four anterior restorative materials. Then samples of each material were tested after one day, three months, and six months immersion in lactic acid utilizing the Instron Universal Testing Instrument. The mean bond strength of each material at each time interval was compared to the mean bond strength of each of the other materials at each time interval. The Newman-Keuls a posteriori Test was used to determine whether there was a significant difference in mean bond strength at each time interval and in the materials overall. Solo Tach (OA ) showed a significantly better mean bond strength overall than any material tested, although it was not signiticantly the best at each interval. Concise (AR) showed the highest bond strength among the anterior restoratives. Superfil (AR) had the lowest bond strength tested at each time interval. The remaining materials were grouped depending upon their mean bond strengths and degrees of non-significance when compared to each other.