Aim: This study aimed to evaluate the aesthetic crown lengthening using flapless and an open-flap Techniqueto manage gingival smile. Materials and Methods: In this study, 32 aesthetic crown lengthening surgeries were performed for 16 patients in the anterior area of the upper jaw in a split-mouth, where one of the sides was treated (randomly) by flapless Technique//Test group//and the other sides treated with open-flap Technique //Control group//. -Clinical parameters were taken and included:

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... aque index (PI); Pocket depth (PD), Bleeding on probing (BOP); Width of keratinized tissue (WKT), Relative clinical attachment level (RCAL), Relative Bone level (RBL), Relative Gingival Margin (RGM). Results: Sixteen patients (9 females, 7 males), aged 26.5±1.3 years (range: 20-36 years), were enrolled at the start of the study. The outcomes showed that using piezo surgery in bone resection is efficient with both surgical techniques. Both techniques created a noticeable improvement in the length of clinical crowns compared to baseline (p<0.05) without significant contrasts between the groups (p>0.05). andresults showed a noticeable improvement in the pain amount values and the index of bleeding on probing in the test group (P < 0.05). Conclusion: Within the limits of this study, the use of piezo surgery aesthetic crown lengthening with flaplessTechnique provides a reliable alternative totraditional aesthetic crown lengthening Technique.