The use of botulinum toxin for the treatment of temporomandibular disorders: preliminary findings.

Abstract

PURPOSE:

The aim of this study was to evaluate the response of patients with temporomandibular disorders to Botulinum toxin A (BTX-A) therapy.

METHODS:

The 15 subjects enrolled in this uncontrolled study were diagnostically categorized and treated with 150 units of BTX-A. Both masseter muscles received 50 units each under eletromyographic (EMG) guidance. Similarly, both temporalis muscles were injected with 25 units each. Subjects were assessed at 2-week intervals for 8 weeks. Outcome measures included subjective pain by visual analog scale (VAS), measurement of bite force, interincisal opening, tenderness to palpation, and a functional index based on multiple VAS.

RESULTS:

All mean outcome measures, with the exception of bite force, showed a significant (P = .05) difference between the preinjection assessment and the four follow-up assessments. No side effects were reported.

CONCLUSIONS:

BTX-A injections produced a statistically significant improvement in four of five measured outcomes, specifically pain, function, mouth opening, and tenderness. No statistically significant changes were found in mean maximum voluntary contraction or in paired correlation of factors such as age, sex, diagnosis, depression index, or time of onset.

• Authors: B Freund, M Schwartz, J M Symington
• Journal: Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons (J Oral Maxillofac Surg) Vol. 57 Issue 8 Pg. 916-20; discussion 920-1 (Aug 1999) ISSN: 0278-2391 [Print] United States
• PMID: 10437718 (Publication Type: Clinical Trial, Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Neuromuscular Agents
• Botulinum Toxins, Type A

Topics

• Administration, Cutaneous
• Adolescent
• Adult
• Aged
• Botulinum Toxins, Type A (administration & dosage)
• Female
• Follow-Up Studies
• Humans
• Injections, Intramuscular
• Male
• Middle Aged
• Neuromuscular Agents (administration & dosage)
• Prospective Studies
• Temporomandibular Joint Disorders (drug therapy, physiopathology)
• Time Factors
• Treatment Outcome