Twice as many women as men suffer from a gummy smile. A smile considered gummy is one that shows an excess of gum tissue (3 mm or more).
Botox is injected above the smile to temporarily denervate the muscles that cause the upper lip to excessively lift. Effective Botox treatment for a gummy smile requires an injection at the the intersection of these three muscles, a triangular area called the Yonsei Point.
Typical Botox treatment for a gummy smile includes injections at the Yonsei Point on either side of the nose and lasts for around 3 months.