Microleakage and Marginal Integrity of Direct and Indirect Composite Resin Restorations in MOD Cavities After Thermo-Mechanical Loading

Authors : Ayşe Aslı ŞENOL, Pınar YILMAZ ATALI, Erkut KAHRAMANOĞLU

Pages : 564-574

Doi:10.33808/clinexphealthsci.880368

View : 55 | Download : 12

Publication Date : 2021-09-27

Article Type : Research Paper

Abstract :Objective: The aim of this in vitro study is to compare the microleakage of mesial-occlusal-distal insert ignore into journalissuearticles values(MOD); composite resin restorations made by using CAD/CAM block and methacrylate/ormocer-based direct resin composites after thermo-mechanical loading. Methods: Standard 40 noncarious human third mandibular molars were selected for the study. Standardized MOD insert ignore into journalissuearticles values(3x4x2mm); cavities were prepared on the mesial and distal sides. The gingival margin was placed above the cementoenamel junction insert ignore into journalissuearticles values(CEJ); on the mesial side and below the CEJ on the distal side. The prepared samples were divided into three experimental groups [indirect group-GrandioBlock insert ignore into journalissuearticles values(GB);, direct-methacrylate group-TetricN-Ceram+TetricN-Flow insert ignore into journalissuearticles values(T+TF);, direct-ormocer group-Admira Fusion+Admira Fusion Flow insert ignore into journalissuearticles values(A+AF);] and control group [direct-methacrylate group-GrandioSo+GrandioSoFlow insert ignore into journalissuearticles values(G+GF);] insert ignore into journalissuearticles values(n=10);. After finishing restorations samples were subjected to 50 N to 240.000 thermo-mechanical cycles insert ignore into journalissuearticles values(5-55°C, for 60 sec); and kept in 0.2% methylene blue. Samples sectioned longitudinally in the mesiodistal direction with a precision cutting device were examined under stereomicroscope at X8 and X25 and microleakage values were scored. In the evaluation of the data, descriptive statistical methods as well as the chi-square test was used for the comparison of qualitative data. Results: No significant difference was found among the coronal and gingival-enamel microleakage distributions of the groups insert ignore into journalissuearticles values(p>0.05);. A statistically significant difference was observed among the gingival-cementum microleakage distributions of the groups insert ignore into journalissuearticles values(p=0.003);. The distribution of gingival-cement microleakage with the no dye penetration score in the T+TF group was found to be statistically significantly lower than the G+GF and GB groups insert ignore into journalissuearticles values(p = 0.010, p = 0.001);. Conclusion: Under the limitation of this in vitro study; restoring MOD cavities using different matrix structures of the composites could not eliminate the leakage at the gingival seat under CEJ.
Keywords : CAD CAM, chewing simulator, microleakage, ormocer, resin composite

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