Purpose: The treatment of advanced gingival recessions represents a clinical challenge due to lack of appropriate interdental support. The objective of this study was to compare the outcomes of root coverage in surgical techniques employed for Tunnel root coverage and Coronally Positioned Flap (CPF), both associated to Subepithelial Connective Tissue Graft (SCTG), in patients with Cairo RT2 gingival recession. Methods: Forty-one Cairo RT2 recessions were selected in 18 patients divided in groups to undergo root coverage surgery. The patients were evaluated at 0, 90, and 180 post-operative days for verification of the recession height and width, probing depth, bleeding on probing, clinical attachment level, gingival thickness, and zone of keratinized tissue (P<0.05%). Results: There was 1.84 ± 1.03 mm gain in gingival height in the Tunnel + SCTG group, and 2.33 ± 0.90 mm in CPF + SCTG group, without statistically significant differences between groups, and the coverage average was 62%. Full coverage was obtained in 17% of recessions. Conclusion: The two techniques presented significant improvement in the periodontal parameters evaluated. Only the keratinized gingiva presented better outcomes in the CPF group.
Objective: To analyze the effects of melatonin administration on the periodontal tissues of rats, linked or not with ligature-induced periodontal disease. Materials and Methods: 40 male Wistar rats aged eight weeks, divided into Control Group (GCON), Ligature Group (GLIG), Melatonin Group (GMEL) and Ligature and Melatonin Group (GLIGMEL). GLIG and GLIGMEL were induced to experimental periodontitis by placing a ligature on the lower molars for 30 days. During the experiment, after 16 days with the ligature, melatonin was administered orally for 10 mg/kg for 14 days in GMEL and GLIGMEL. In the end, euthanasia was performed and the hemi-mandibles were collected for the respective histological and radiographic analyzes; for the results, Shapiro-Wilk, ANOVA-One-Way and Tukey's multiple comparison tests were used. Results: A significantly lower alveolar bone loss (p<0.05) was demonstrated in the animals that received the administration of melatonin, in which it had a prophylactic function against the effects of the disease, evidenced in radiographic, histomorphometric and histological analyzes in the bone cell count. Conclusion: Results show that the therapy with administration of melatonin promotes a protective effect on the alveolar bone tissue of rats with induced experimental periodontitis.
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