Maxillofac Plast Reconstr Surg.  2019 ;41(1):17. 10.1186/s40902-019-0201-9.

Botulinum toxin-A injection into the anterior belly of the digastric muscle for the prevention of post-operative open bite in class II malocclusions: a case report and literature review

Affiliations
  • 1Department of Oral and Maxillofacial Surgery, College of Dentistry, Gangneung-Wonju National University, Gangneung, 28644 Republic of Korea. kimsg@gwnu.ac.kr.
  • 2Department of Orthodontics, College of Dentistry, Gangneung-Wonju National University, Gangneung, 28644 Republic of Korea.

Abstract

BACKGROUND
Class II malocclusion patients with hyperdivergent facial types are characterized by short mandibular body lengths and anterior open bite. Accordingly, the treatment for hyperdivergent skeletal class II malocclusion is a lengthening of the mandibular body length and a counterclockwise rotation of the mandible. To prevent post-operative relapse, botulinum toxin-A (BTX-A) injection can be a retention modality.
CASE PRESENTATION
A class II open-bite patient received BTX-A injection to the anterior belly of her digastric muscle for the prevention of post-operative relapse. The relapse was evaluated via a clinical examination and a lateral cephalometric radiograph after the completion of post-surgical orthodontic treatment. The patient showed stable occlusion without any signs of relapse at 15"‰months post-operatively.
CONCLUSION
In this case presentation, a single injection into the anterior belly of the digastric muscle was sufficient for the prevention of post-operative open bite.

Keyword

Botulinum toxin-A; Open bite; Malocclusion; Orthognathic surgery; Relapse

MeSH Terms

Humans
Malocclusion*
Mandible
Open Bite*
Orthognathic Surgery
Recurrence
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