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Randomized Controlled Trial
. 2021 Oct 1;16(10):e0258063.
doi: 10.1371/journal.pone.0258063. eCollection 2021.

Effects of low-level laser therapy versus soft occlusive splints on mouth opening and surface electromyography in females with temporomandibular dysfunction: A randomized-controlled study

Tamer Shousha  1   2 , Mohamed Alayat  2   3 , Ibrahim Moustafa  1   2
Affiliations
Randomized Controlled Trial

Effects of low-level laser therapy versus soft occlusive splints on mouth opening and surface electromyography in females with temporomandibular dysfunction: A randomized-controlled study

Tamer Shousha et al. PLoS One. .

Abstract

Background: Low level lasers have been used as an alternative pain relief therapy for muscle and joint pain, since it induces analgesic, anti-inflammatory, and biomodulation effects of the physiological cell functions. The effectiveness of low-level laser therapy in temporomandibular joint dysfunction (TMD) treatment, however, is not well established. Although Surface electromyography (sEMG) has been suggested as a complementary means in TMD diagnosis, the effect of conservative treatments on muscle activity has not yet been thoroughly correlated with (sEMG) findings.

Purpose: To assess the efficacy of low-level laser therapy (LLLT) as compared to occlusive splint therapy (OST) on the TMJ opening index (TOI) and sEMG of masticatory muscles.

Materials and methods: 112 female subjects suffering from unilateral myogenous TMD, aged 21-30 years-old, were recruited and divided into three groups: LLLT; soft occlusive splint therapy OST and a waitlist group as controls.

Outcome measures: TMJ opening index (TOI), Visual analogue scale (VAS), surface electromyography (sEMG).

Results: A significant reduction was reported in TOI, VAS and the sEMG within the LLLT and OST groups as well as significant decrease in all outcomes between groups in favor of the LLLT group (P< 0.0001). Meanwhile, there was a weak significant difference within the control group probably attributed to the analgesic. Post-hoc pairwise comparisons between groups [control vs occlusive splints, control vs low-level laser and low-level laser vs occlusive splints] revealed significant differences in the VAS and TOI [P = 0.0001; 95% CI: 0.9-2.2, 1.61-4.01, 0.65-1.96].

Conclusions: Findings support an evident short term therapeutic effect of the LLLT on improving VAS, TOI and sEMG in females suffering from myogenous TMD.

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Conflict of interest statement

The authors have declared that no competing interests exist.

Figures

Fig 1
Fig 1. Randomization flow chart.
See this image and copyright information in PMC

References

    1. De Leeuw R, Klasser GD. Orofacial pain: guidelines for assessment, diagnosis, and management. Quintessence Chicago; 2008.
    1. Dworkin SF, Huggins KH, LeResche L, Von Korff M, Howard J, Truelove E, et al.. Epidemiology of signs and symptoms in temporomandibular disorders: clinical signs in cases and controls. J Am Dent Assoc. 1990;120(3):273–81. doi: 10.14219/jada.archive.1990.0043 - DOI - PubMed
    1. Blanco-Hungría A, Rodríguez-Torronteras A, Blanco-Aguilera A, Biedma-Velázquez L, Serrano-del-Rosal R, Segura-Saint-Gerons R, et al.. Influence of sociodemographic factors upon pain intensity in patients with temporomandibular joint disorders seen in the primary care setting. Med Oral Patol Oral Cir Bucal. 2012;17(6):1034–41. doi: 10.4317/medoral.17576 - DOI - PMC - PubMed
    1. Kraus SL. Characteristics of 511 patients with temporomandibular disorders referred for physical therapy. Oral Surg Oral Med Oral Pathol Oral Radiol. 2014;118(4):432–9. doi: 10.1016/j.oooo.2014.06.005 - DOI - PubMed
    1. Rashid A, Matthews NS, Cowgill H. Physiotherapy in the management of disorders of the temporomandibular joint—perceived effectiveness and access to services: a national United Kingdom survey. Br J Oral Maxillofac Surg. 2013;51(1):52–7. doi: 10.1016/j.bjoms.2012.03.009 - DOI - PubMed

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