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The aim of this in vitro study is to investigate the effects of ozone and conventional cavity disinfectant on microleakage at the cavities which are restorated with different restorative materials. Ninety human molar teeth were used in this study. Black V cavities are prepared on buccal surfaces of teeth. Teeth are divided to 3 groups which contains 30 teeth. Group 1: ozone applied; Group 2: 2% chlorhexidine applied; Group 3: any disinfectant is not applied. And then all groups are divided to three subgroups. All subgroups are restored with silorane, ormocer, and traditional composite according to the manufacturer's directions. Sections were examined under a microscope. Occlusal and gingival microleakage values by a separate researcher and scores were recorded. Statistically results were reviewed with ANOVA and Kruskal-Wallis Tests. Statistically significant difference of microleakage between cavity disinfectant and control groups' occlusal and gingival lines was not found (p > 0.05). There was no differences at occlusal lines of composite subgroups (p > 0.05) but also significant difference at gingival lines was found (p < 0.05). Statistically significant difference was found among the composite materials, between chlorhexidine and control groups' gingival lines. The most successful results at gingival lines were found with silorane. [ABSTRACT FROM AUTHOR]

Periapical lesions are frequently encountered in dentistry and are a condition which can cause loss of teeth. Diagnosis is made on the basis of the anamnesis, radiographic findings and by the examination of percussion and the vitality of related teeth. Histopathological findings generally conform with radiographic findings. The case is here presented where, following endodontic treatment of the right mandibular first incisor with dilaceration and periapical lesion, and the left mandibular first incisor with periapical lesion, root tip resection was applied. At the end of 6 months observation, as there was improvement in the lesion root tip surgery was applied. During a 2-year follow-up period, the lesion has diminished and recovery has been observed in the bone. [ABSTRACT FROM AUTHOR]