Abstract: PURPOSE: To evaluate the clinical efficacy of tunnel technique combined with connective tissue grafting in the treatment of gingival recession with non-carious cervical lesion(NCCL). METHODS: Fourteen patients with 26 gingival receding sites who were admitted to Hefei Stomatological Hospital from January 2021 to August 2022 due to gingival receding and sensitivity to cold and heat were selected as the research objects. All patients were treated with tunnel technology combined with connective tissue grafting. Clinical indexes such as gingival receding (GR), probing depth (PD), clinical attachment loss(CAL), keratinized gingival width (KTW) and tooth defect depth were measured before surgery, 3 months after surgery and 6 months after surgery, respectively, to evaluate the clinical efficacy. RESULTS: At 3 and 6 months after surgery, GR and CAL were significantly decreased(P<0.05), and KTW was significantly increased(P<0.05). Three months after operation, the complete root coverage rate was 77.00%, and the average root coverage rate was 94.23%. At 6 months after operation, the complete root coverage rate was 73.00%, and the average root coverage rate was 93.27%. CONCLUSIONS: Tunnel technique combined with connective tissue grafting can be used for the treatment of MillerⅠ and Miller Ⅱ gingival receding with NCCL, and the clinical and aesthetic results are significant and stable.

Key words: Gingival recession, Root coverage, Tunnel technology, Connective tissue grafting