Liberação do músculo depressor do septo nasal e sorriso gengival – série de 5 casos

Abstract

Nasal Septal Depressor Muscle Release Surgery (NSDMRS) is a plastic intervention commonly used to correct the angulation of the nose. With the advent of aesthetic dentistry, new techniques emerged to correct gummy smiles and this procedure began to be used for this purpose. With a Z-plasty technique, the surgical intervention consists of disrupting the fibers of the medial belly of the nasal septum depressor muscle, resulting in a reduction in gingival exposure, an increase in the angle of the nose and an increase in the length of the lips in retention and during smiling. This study aims to report a series of five cases in which patients underwent clinical analysis and verification of gingival exposure greater than 3mm, conditioning the indication for gummy smile treatment using LMDSN. Seven days after surgery, the stitches were removed and clinical analysis of the results was carried out after X period. The experimental data were subjected to the Shapiro-Wilk normality test, those with normal distribution were analyzed using the t test. Values were presented as mean and standard deviation. The media referring to the gingival exposure of each group of teeth implanted before the procedure were: tooth 11 – 5.6mm; tooth 12-7.02mm; tooth 21- 5.42mm; and tooth 22-6.0mm. After the procedure, the average values were changed to: tooth 11- 4.3mm; 12- 5.5mm; 21- 4.2mm and 22- 5.2mm. In relation to the length of the suspension and smile intervals, there was a change from 22.8mm and 16.7mm to 23.6 and 17.4mm respectively. As for the nose angle, the average changed from 81.7o to 90.04o. Therefore, even though it is not a procedure that involves surgical intervention on the attached gums or gingival sulcus, Nasal Septum Depressor Muscle Release Surgery is an effective treatment for patients with a gummy smile.