Evaluation of clinical effectiveness of Nd

Abstract

Clinical crown lengthening by forced tooth eruption is followed by conventional surgical methods. This study aimed to determine the clinical usage of Nd:YAG laser in clinical crown lengthening by forced tooth eruption. Methods and materials: Twenty patients who were candidates for clinical crown lengthening underwent forced tooth eruption. Fiberotomy with Nd:YAG laser was performed 2 days after initiation of forced tooth eruption and every 2 weeks thereafter to reach to optimum clinical crown. Location of gingival margin was measured by Williams probe. The studied variables include the sulcus depth in mesiofacial, midfacial, distofacial and midlingual points of affected tooth, distance between gingival margin and acrylic stent, distance from dental tissue to gingival margin (clinical crown length) and bone level (distance from bone level to stent). The data were analyzed by SPSS 15 software using descriptive (mean value and standard deviation) and inferential statistical methods. Results: The Wilcoxon test was used for non-parametric variables including the sulcus depth and the paired t-test was used for parametric variables including distance between gingival margin and stent, distance between bone and stent and distance from dental tissue to gingival margin. A difference was considered significant at P values <0.05. The results showed that the sulcus depth remained unchanged following fiberotomy (P>0.05) and the distances from gingival margin and bone to stent were not changed significantly following fiberotomy (P>0.05). Data analysis showed that distance between dental tissue and gingival margin was increased following fiberotomy (P <0.05). Conclusion: The results of this study showed that location of gingival margin and alveolar bone crest was remained unchanged following fiberotomy by Nd:YAG laser during forced tooth eruption; and Nd:YAG laser can be used as a proper method for fiberotomy.