Effect and longevity of botulinum toxin in the treatment of gummy smile: a meta-analysis and meta-regression

ConclusionBotulinum toxin is an alternative technique considered effective for reducing gummy smile, especially for gummy smiles up to 4 mm, with a longevity of at least 12 weeks, returning close to initial values within 24 weeks after application.Clinical relevanceThe knowledge about the longevity and effectiveness of botulinum toxin in the treatment of gummy smile allows for a more adequate clinical planning for these cases, as well as for clinical decisions, as for prognostic factors.
Source: Clinical Oral Investigations - Category: Dentistry Source Type: research