Abstract
The objective of this article is to present 3 various types of gummy smile treated with botulinum toxin-A injection per site at Yonsei points. The patients, who visited the department to demand a more aesthetic smile, were classified according to gummy smile type: asymmetric, anterior, and mixed. Botulinum toxin-A injection at Yonsei point was considered. Preinjection and postinjection pictures were taken, and the severity of excessive gingival display was measured for each tooth between second premolars. Two weeks after botulinum toxin injections, no complication was noted. The amount of excessive gingival display for each tooth between second premolars was measured less than 3 mm, and the percentage of improvement for each case was calculated 100%. The botulinum toxin injection at Yonsei point may be a predictable and noninvasive treatment option for various types of gummy smile.
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