Eficácia da toxina botulínica isolada ou associada na correção do sorriso gengival: revisão baseada em evidências.

Abstract

Introduction: The smile is the concept a key role in the transmission of emotion, and its aesthetic is considered an important part in facial harmony. When you have an imbalance in the exposure of gum length, you are diagnosed with gingival smile. There are several therapeutic alternatives for the correction of the gingival smile, but they are invasive interventions that cause a lot of discomfort in the postoperative period. A current and less invasive alternative is the use of Botulinum Toxin Type A (BTX-A). Materials and Methods: The electronic databases Medline / Pubmed, Scopus and Web of Science were searched after inclusion criteria were applied, individuals older than 15 years with gingival smile and treated with injections of BTX-A alone or in combination with other procedures. Results: 5 studies were finally selected for the study, 4 trials of non-randomized trials and 1 clinical trial. The decrease of the gingival smile when treated with BTX-A associated with lip repositioning surgery was 5 mm compared to the BTX-A application alone there was a variation from 3.04 to 5.11 with an average of 3, 93 mm. Discussion The use of BTX-A in the correction of the gingival smile is effective mainly in the first two weeks after the application, either for the use alone or with association to the surgery of repositioning of the upper lip. Further randomized controlled trials are needed to assess the use of BTX-A associated with other procedures.