Quintessence Int. 2021 Jun 9;52(7):576-582. doi: 10.3290/j.qi.b1098307.
To describe the step-by-step procedure of a novel surgical technique consisting of a combination of the laterally closed tunnel (LCT) and the modified coronally advanced tunnel (MCAT) (ie, LCT/MCAT), designed to treat multiple mandibular adjacent gingival recessions (MAGR) and to present the clinical outcomes obtained in 11 consecutively treated patients.
Eleven systemically and periodontally healthy patients (7 females, mean ± SD 33.62 ± 14.6 years, min. 19 years max. 67 years) with a total of 40 adjacent mandibular RT1 (ie, Miller Class 1 and 2) gingival recessions with a minimum depth ≥ 3 mm, were consecutively treated with LCT/MCAT, in conjunction with an enamel matrix derivative (EMD) and subepithelial palatal connective tissue graft (SCTG). Treatment outcomes were assessed at baseline and at 12 months postoperatively. Prior to surgery and at 12 months postoperatively, recession depth (RD) and recession width (RW) were evaluated. The primary outcome variable was complete root coverage (CRC, ie 100% root coverage), the secondary outcome was mean root coverage (MRC).
Postoperative pain and discomfort were low and the healing was uneventful in all cases without any complications. At 12 months, statistically significant (P < .05) root coverage (RC) was obtained in all patients. CRC was obtained in five patients with a total of 21 recessions, while MRC measured 92.9% (ie, 3.75 mm). In seven patients (ie, 63.6%), RC amounted to > 93% while the minimum RC per patient measured 83.76%.
The results of the present case series suggest that the LCT/MCAT is a valuable technique for the treatment of mandibular RT1 MAGR.
描述一种新型手术技术的逐步过程，该技术结合了侧向封闭隧道（LCT）和改良冠状推进隧道（MCAT）（即 LCT/MCAT），旨在治疗多个下颌相邻牙龈退缩（MAGR），并介绍 11 例连续治疗患者的临床结果。
11 名系统和牙周健康的患者（7 名女性，平均年龄 ± 标准差 33.62 ± 14.6 岁，最小 19 岁，最大 67 岁），共有 40 个相邻下颌 RT1（即 Miller 1 类和 2 类）牙龈退缩，最小深度≥3mm，连续接受 LCT/MCAT 治疗，同时使用牙骨质基质衍生物（EMD）和上皮下腭结缔组织移植物（SCTG）。在基线和术后 12 个月评估治疗结果。在手术前和术后 12 个月，评估了退缩深度（RD）和退缩宽度（RW）。主要观察变量是完全根覆盖（CRC，即 100%根覆盖），次要观察变量是平均根覆盖（MRC）。
所有患者的术后疼痛和不适均较低，愈合顺利，无任何并发症。在 12 个月时，所有患者的根覆盖（RC）均有统计学意义（P<0.05）。5 名患者的 21 个退缩中有 5 名患者获得 CRC，而 MRC 为 92.9%（即 3.75mm）。在 7 名患者（即 63.6%）中，RC 达到>93%，而每位患者的最小 RC 为 83.76%。
本病例系列研究的结果表明，LCT/MCAT 是治疗下颌 RT1 MAGR 的一种有价值的技术。
