Botulinum toxin type-A has also been Employed in the treatment of gummy smiles;[167] the fabric is injected in to the hyperactive muscles of upper lip, which causes a discount in the upward motion of lip Hence leading to a smile that has a a lot less publicity of gingiva. https://botulinum-toxins83367.eqnextwiki.com/5012157/what_does_different_types_of_botulinum_toxins_mean