Related Experiment Video
Updated: May 26, 2026

Single-stage Dynamic Reanimation of the Smile in Irreversible Facial Paralysis by Free Functional Muscle Transfer
Published on: March 1, 2015
Botulinum Toxin for Lip Inversion in Gummy Smile
Sandeep Arora1,2, Gulhima Arora1
1Dermatology, Mehektagul Dermaclinic, New Delhi, IND.
None:
A gummy smile results from varied factors, including excessive muscle activity, maxillary bone variations, dental malformations, or smaller lip volume. Botulinum toxin is used to correct a gummy smile when there is excessive vertical upper lip mobility. Lip inversion can accompany a gummy smile. We report a case of lip inversion accompanying a gummy smile corrected with botulinum toxin. This simple procedure can be instituted at the stage of gummy smile correction or upon follow-up for its correction, and can obviate the need for overdosing and the use of lip fillers.
Related Concept Videos
Directly Acting Muscle Relaxants: Dantrolene and Botulinum Toxin
The binding of dantrolene to the RYR1...
Skeletal Muscle Relaxants: Therapeutic Uses
Muscles for Facial Expressions
