The Effect of Botulinum Toxin A In Patients With Excessive Gingival Display With And Without Zinc Supplementation

Exclusion Criteria

• •Severe VME.
• •Pregnant or lactating females.
• •Patients with inflamed gingiva or gingival enlargement.
• •Inflammation or infection at the site of injection.
• •Patients with known allergy to any of the components of BTX-A or BTX-B (i.e. BTX, human albumin, saline, lactose and sodium succinate).
• •Patients using anticholinesterase or other agents interfering with neuromuscular transmission.
• •Psychologically unstable or who have questionable motives and unrealistic expectations.
• •Dependent on intact facial movements and expressions for their livelihood (e.g. actors, singers, musicians and other media personalities).
• •Afflicted with a neuromuscular disorder (e.g. myasthenia gravis, Eaton-Lambert syndrome).