Abstract
Background. Temporomandibular joint dysfunction (TMD) is a term that describes problems in the masticatory system, including the temporomandibular joint, the dento-muscular system and the supporting bones. Injection of botulinum toxin, as a noninvasive technique, might be useful in decreasing symptoms such as muscular spasm, dystonia, migraine headaches and TMD. Therefore, the aim of the present study was to evaluate the effect of injection of botulinum toxin on decreasing the symptoms and signs of masticatory muscles in patients with TMD. Methods. A total of 61 patients were consecutively included in the present study in 2016‒2017. All the subjects received a 50-unit injection of Dysport botulinum toxin in the masseter muscles using an extraoral injection technique. The results of the injection were evaluated in terms of pain severity using VAS, clinical evaluations of the joint click through palpation and by determining the inter-incisal distance. The patients underwent follow-up examinations at 1-week, 3-month and 6-month intervals after injection. Data were analyzed with appropriate statistical tests. Results. Comparison of pain severity and articular clicks at different intervals showed decreases in these parameters over time, with significant differences between the time intervals (P<0.05). Comparison of mouth opening at different intervals showed increases in mouth opening over time. Conclusion. The results of the present study showed that injection of botulinum toxin can be used in patients with TMD as a non-invasive treatment modality
Highlights
Temporomandibular joint dysfunction (TMD) describes problems in the masticatory system, JODDD, Vol 13, No 2 Spring 2019 including TM joint, the dento-muscular system and the supporting bones
The results of the present study showed that injection of botulinum toxin can be used in patients with TMD as a non-invasive treatment modality
In oneweek follow-up in the present study, pain decrease was lower compared to the study above. It might be concluded from the results of the present study that injection of botulinum toxin can be used as an adjunct for the noninvasive treatment of TMDrelated disorders
Summary
Temporomandibular joint dysfunction (TMD) describes problems in the masticatory system, JODDD, Vol 13, No 2 Spring 2019 including TM joint, the dento-muscular system and the supporting bones. The prevalence of this disorder in the adults is around 40‒70% and in children in the deciduous dentition period the prevalence is approximately 16%, with 90% in the mixed dentition period.[1,2,3] In the majority of cases, TMD is associated with pain and jaw dysfunction; it might be manifested in the form of headaches, cervical pain and facial swelling.
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