Tözüm Tolga F, Keçeli H Gencay, Güncü Güliz N, Hatipoğlu Hasan, Sengün Dilek
Department of Periodontology, Faculty of Dentistry, Hacettepe University, Ankara, Turkey.
J Periodontol. 2005 Nov;76(11):1842-8. doi: 10.1902/jop.2005.76.11.1842.
The increasing interest in esthetics and the subsequent need to solve related problems such as hypersensitivity and root caries have favored the development of many surgical procedures that permit the coverage of exposed roots. This clinical study was conducted to examine the coverage of gingival recession defects, where two different subepithelial connective tissue graft (SCTG) techniques (Langer and Langer and modified tunnel) were used.
Thirty one patients (21 females and 10 males), each contributing Miller Class I and II gingival recessions, were selected. Recession defects were randomly treated by using the Langer and Langer technique (17 patients) or the modified tunnel technique (14 patients). Vertical recession, probing depth (PD), and attachment level were assessed at baseline and 6 months postoperatively.
Six months after the surgery, a significant reduction in recession depth was noticed in both groups. There was also a decrease of PD and attachment level for both groups, but not statistically significant. In comparison, at 6 months, statically significant differences were found between the tunnel and Langer and Langer techniques for root coverage and attachment gain. The percentage of root coverage was 96.4% and 75.5% in the tunnel and Langer and Langer groups, respectively.
The present study suggests that the use of SCTG in combination with a tunnel procedure may result in an increased amount of root coverage and clinical attachment gain compared to the Langer and Langer technique. Further comparative studies are necessary to understand the periodontal healing generated by the tunnel procedure and Langer and Langer technique.
人们对美观的关注度日益提高，随之而来的是需要解决诸如牙齿过敏和根面龋等相关问题，这推动了许多能够覆盖暴露牙根的外科手术的发展。本临床研究旨在检查牙龈退缩缺损的覆盖情况，其中使用了两种不同的上皮下结缔组织移植（SCTG）技术（兰格技术和改良隧道技术）。
选取了31例患者（21例女性和10例男性），每位患者均有米勒I类和II类牙龈退缩。退缩缺损随机采用兰格技术（17例患者）或改良隧道技术（14例患者）进行治疗。在基线和术后6个月评估垂直退缩、探诊深度（PD）和附着水平。
术后6个月，两组的退缩深度均显著降低。两组的PD和附着水平也有所下降，但无统计学意义。相比之下，在6个月时，隧道技术与兰格技术在牙根覆盖和附着获得方面存在统计学显著差异。隧道组和兰格组的牙根覆盖百分比分别为96.4%和75.5%。
本研究表明，与兰格技术相比，使用SCTG结合隧道手术可能会增加牙根覆盖量和临床附着获得。需要进一步的比较研究来了解隧道手术和兰格技术所产生的牙周愈合情况。
