MARGINAL LEAKAGE EVALUATION OF COMPOSITE INLAY, INDIRECT PORCELAIN INLAY AND TEETH RESTORED WITH CAD/CAM SYSTEMS: IN VITRO STUDY

Aim: the aim of this study was to evaluate the in vitro marginal leakage of inlays performed with different methods and materials. materials and methods: in this study, class ii mesio-occlusal cavities were prepared on 80 caries and restoration free human third molar teeth. the teeth were divided into four groups and 20 teeth each. 1. group: filtek ultimate (3m espe, st. paul, mn, abd) direct composite inlays, 2.group: lava ultimate cad/cam (3m espe, st. paul, mn, abd) inlays, 3.group: ips e.max press (ivoclar vivadent, amherst, ny) ceramic inlays and 4.group: ips e.max cad (ivoclar vivadent, amherst, ny) inlays were prepared. after finishing and polishing procedures 10.000 thermal cycles between 5±1°c and 55±1°c were applied to all specimens. all samples, except 1 mm around the restoration margin, were coated with two layers of nail varnish, and were suspended in 0.5 % basic fuchsine solution for 24 hours. to evaluate the microleakage, the teeth were cut longitudinally in occluso-gingival direction. the dye penetration was examined under a stereomicroscope (30x magni- fication) and scored. the results were statistically analyzed by using kruskal-wallis, mann-whitney u and wilcoxon signed ranks tests (significance level of p<0.05). results: in occlusal part, lowest microleakage values were obtained in e.max cad and lava groups. cad/cam groups showed statistically significant lower microleakage values than the other groups in occlusal part (p=0,000). in gingival part, there were no significant difference between the groups (p=0,825). conclusion: when microleakage values of occlusal regions were compared, cad / cam generated inlay groups gave better results; but in cervical regions, no significant difference was founded between the groups. however, there is a need to support the in vitro findings by in vivo studies.