Bruxism in children is a challenging condition with a wide range of clinical consequences, including dental wear, muscle fatigue, and an increased risk of temporomandibular disorders. Despite its prevalence, evidence-based treatment options for pediatric patients remain limited. This case report describes the successful use of botulinum toxin type A (BTX-A) in managing sleep bruxism in an otherwise healthy 8- year-old girl. The patient received 10 units of BTX-A in each masseter muscle, administered at two points per side using anatomical landmarks and muscle palpation to guide injection. Symptom resolution was reported as early as the day after treatment, with effects lasting approximately two months and no adverse reactions observed. This is the first known report of BTX-A being used to treat bruxism in a healthy pediatric patient. The findings suggest that botulinum toxin may be a safe and effective alternative for managing muscle hyperactivity in children. Further research is needed to establish optimal dosing protocols and long- term safety.

Franco Ignáccio Mallaguti graduated from the University of Uberaba - MG - Brazil. He specialized in Periodontics, Implantology, and Restorative Dentistry. He holds a Master's degree in Implantology and is a resident in Orofacial Harmonization. He is the co-author of the chapter "Zirconia: the current state" in the book "Aesthetic Reconstructions with Implants" (Elsevier Editora Ltda). He won the award for best presentation at the UNIUBE Dental Conference in 2012.Holds a degree in Dentistry from the University of Uberaba (2013), a specialization in Implantology from the PI Branemark Institute - Bauru (2016), a specialization in Periodontics from the Brazilian Dental Association - Goiás Section (2016), a specialization in Restorative Dentistry from the Brazilian Dental Association - Goiás Section (2018), a master's degree in Implantology from the São Leopoldo Mandic Dental Research Center (2021), and completed secondary education at the Cenecista Dr. José Ferreira College (2009). Currently works as a dentist at the Malaguti Institute of Advanced Dental Technologies LTDA .