Comparison of micro-leakage in class V ceramic inlay restorations cemented with two different resin cements

Resin cements are usually used for bonding ceramic inlays. The aim of this study was to evaluate the micro-leakage in class V ceramic inlays cemented with two different resin cements. A total of 30 class V cavities were prepared in buccal surfaces of human extracted molars with occlusal margins in enamel and gingival margins in dentin (cementum). Ceramic inlays were prepared for all cavities and were cemented either with Variolink / Excite DSC or Panavia F/ED primer. These teeth were thermocycled and covered with sticky wax except for 1 mm around cavities and were immersed into 2% Methylen blue for 48 hours. The teeth were sectioned longitudinally and dye penetration was evaluated using stereomicroscope. Data was analyzed using nonparametric tests. There were no significant difference between the two types of cements in dentin or enamel margins (P>0.05). Compared with enamel margins, Panavia F showed less micro-leakage in dentin margins (P<0.05). The resin cements under evaluation in this study can not completely prevent micro-leakage. It seems that both cements have almost the same effects regarding micro-leakage reduction.