The objective of the current study was to assess histomorphometrically the healing process of recession defects associated with scraped roots treated with subepithelial connective tissue graft (SCTG). Six dogs were used. Bone dehiscence defects (6 × 8 mm) and root planing were carried out on maxillary canine teeth. Following a split-mouth model, according to the treatment, left canines (control) were covered with coronally positioned flap (CPF). Right canines were submitted to treatments with SCTG. After a 3-month postoperative period, the animals were killed, and the blocks processed for the histomorphometric assessment. Data assessment demonstrated that the CPF group showed parameters of a new connective tissue attachment, length of new cement (NC), length of new bone (mean ± SD: 0.95 ± 0.53, 2.44 ± 1.97, and 1.96 ± 2.29 mm, respectively), which were higher than those of SCTG group (mean ± SD: 0.71 ± 0.36, 2.21 ± 1.28, and 1.52 ± 1.31 mm, respectively), although not significantly (P > 0.05). The length of both epithelial tissue and connective tissue apposition in the SCTG group (mean ± SD: 1.70 ± 0.53 and 2.62 ± 1.52 mm, respectively) were higher than those of the CPF group (mean ± SD: 1.18 ± 0.49 and 2.03 ± 1.03 mm, respectively), although showing no significant differences (P > 0.05). Within the limits of the current study, it was possible to conclude that there were no significant differences between the groups according to the histologic parameters assessed.
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