LITTLE KNOWN FACTS ABOUT BOTULINUM TOXINS.

Botulinum toxin type-A has also been used in the treatment of gummy smiles;[167] the fabric is injected into the hyperactive muscles of higher lip, which causes a reduction in the upward movement of lip Consequently causing a smile having a considerably less publicity of gingiva.The oral commissures (depressor anguli oris muscles) are A further com