The effect of botulinum toxin A in patients with excessive gingival display with and without zinc supplementation: randomized clinical trial.
Nesma ShemaisAzza Ezz ElarabHani ElNahassPublished in: Clinical oral investigations (2021)
Botulinum Toxin A (BTXA) is used to correct gummy smile; however, its main drawback is its short-lasting effect. Oral zinc supplement intake prior to BTXA injection could maintain the effect of BTXA and enhance its clinical efficacy.