Özet:

Purpose: The purpose of this study is to evaluate in vitro inley applications restored by different methods and ma-terrals in terms of bound leakage. Instrument and Method: In the study; crushed and unrestored 80 pieces of 3.molar human tooth class II (mezio-oclusal) inley curtains were prepared. The teeth were divided into four groups, which will be 20 in each group. 1.Group: Filter Ultimate (3M ESPE, St. Paul, MN, USA) composite, 2.Group: Lava Ultimate CAD/CAM (3M ESPE, St. Paul, MN, USA), 3.Group: IPS e.max Press (Ivoclar Vivadent, Amherst, NY) ceramic inlets and 4.Group: IPS e.max CAD (Ivoclar Vivadent, Amherst, NY) inlets are prepared. After the completion and polysage processes, the thermal cycle was applied 10,000 times at 5±1°C and at 55±1°C to all samples. In all samples, the remaining areas outside the 1 mm area around the restoration were covered with a double nail skin and kept in a 0.5% basic fuxin solution for 24 hours. The boundary was cut longitudinally in the okluzo-gingival direction to assess the leakage. Paint penetration under a stereomicroscope (30x enlargement) was studied and scored. The results were statistically evaluated by the tests of Kruskal-Wallis, Mann-Whitney U and Wilcoxon Signed Ranks (Rate of Meaning p<0,05). The findings: The outbreak in the Oklüzal region was observed in the e.max CAD and Lava Ultimate groups. Groups prepared using the CAD/CAM method showed significantly lower leakage values in the oklusal area (p=0,000) than other groups. When the flow values in the Gingival area were studied, there was no significant difference between the groups (p=0,825). Result: Inley groups produced by CAD/CAM compared to microsisance values give more successful results, especially in the cervical area, while there was no significant difference between the groups in the cervical area. However, in vitro studies need to be supported by in vivo studies. Keywords: CAD/CAM system, direct composite inley, indirect porselen inley, microsisection MARGINAL LEAKAGE EVALUATION OF COMPOSITE INLAY, INDIRECT PORCELAIN INLAY AND TEETH RESTORED WITH CAD/CAM SYSTEMS: IN VITRO STUDY ABSTRACT 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, USA) direct composite inlays, 2.Group: Lava Ultimate CAD/CAM (3M ESPE, St. Paul, MN, USA) 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 the 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. Keywords: CAD/CAM system, direct composite inlay, indirect porcelain inlay, microleakage.