Abstract

The aim of this study is to compare the degree of microleakage in primary teeth prepared by Er:YAG laser due to using two types of bonding materials (in vitro). This study consists of 40 newly extracted human primary teeth which its buccal surface is clear from caries. A standard class (v) cavity was prepared in buccal surface of all teeth by using Er:YAG laser. The sample was divided equally into two groups: conventional bond was used to restore first group, while self-etching bond was used in the second group. The sample was restored by using TETRIC N-CERAM composite. After finishing the restorations, all the teeth were immersed in 2% methylene blue solution for 24 hours. The microleakage degree was measured after making bucco-lingual section, then it was examined by stereomicroscope, and data was statistically studied by Mann-Whitney U test. As a conclusion, there was no significant difference between conventional and self-etching bond. As a result of this study it is clear that the self-etching bond can be used as an alternative way to conventional bond in pediatric dentistry.