Comparison of microleakage in class V direct composite and ceramic inlay restorations cemented with two different resin cements

Ceramic inlays are alternative systems for restoring dental cavities with tooth colored materials. These restorations may have some benefits over direct composite restorations such as reduction in the bulk of the cured composite. The aim of this study was to evaluate the microleakage of direct composite restorations and ceramic inlays with two different resin cements. In this experimental study, 45 class V cavities [15 teeth in each group] were prepared in buccal surfaces of human extracted molars. For 30 cavities, ceramic inlays were prepared and were cemented either with Variolin k / Excite DSC or Panavia F / ED primer. Fifteen samples were restored with Excite / Heliomolar [direct composite]. Then the teeth were thermocycled and were covered with sticky wax and were immersed into the 2% Methylene blue for 48 hours. The teeth were sectioned longitudinally and dye penetration was determined. Data were statistically analyzed using nonparametric tests of Kruskal Wallis, and Mann Whitney with significance level 0.05. Enamel margins showed less microleakage than dentin margins in all groups [P<0.05]. No significant differences were observed between the materials used in this study [P>0.05]. The materials used in this study can not completely prevent microlekage. It seems that ceramic inlays can not reduce microleakage over direct composite significantly

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