Open AccessEvaluation of the botulinum toxin effects in the correction of gummy smile 32 weeks after application
Author(s) -
Carlos Eduardo Alonso Vieira,
Wilson Rodrigues de Almeida,
Paula Cotrin,
Renata Cristina Gobbi de Oliveira,
Ricardo César Gobbi de Oliveira,
Fabrício Pinelli Valarelli,
Julie Watanabe Zamuner,
Karina Maria Salvatore de Freitas
Publication year - 2022
Publication title -
abcs health sciences
Language(s) - English
Resource type - Journals
eISSN - 2357-8114
pISSN - 2318-4965
DOI - 10.7322/abcshs.2020052.1501
Subject(s) - botulinum toxin , medicine , dentistry , orthodontics , surgery
The use of botulinum toxin type A (BTX-A) to correct gummy smile has become popular in recent years. Objective: To evaluate the effects of BTX-A application in the correction of gummy smile 2 and 32 weeks after application. Methods: The sample comprised 35 patients (30 female, 5 male) at a mean age of 25.51 years (±5.59) with gummy smile due to muscular hyperfunction. In each patient, 2U of botulinum toxin was applied in the levator labii superioris alaeque nasi, 2 mm from the nasolabial fold. Photographs of spontaneous smiles were taken at 3 stages: before, 2 and 32 weeks after BTX application. Measurements of the gingival display were performed with the Radioface Studio 2 Software, and the calibration used the actual size of the right maxillary central incisor. Comparison of the three stages evaluated was performed with repeated measures ANOVA and Tukey tests. Results: Gingival display decreased significantly 2 weeks after BTX-A application and increased after 32 weeks but did not return to the initial value. Conclusion: There was a significant improvement in gummy smile 2 weeks after botulinum toxin application, and a significant relapse in the gingival display after 32 weeks, however not returning to baseline values.