Alice Helena de Lima Santos Cardoso1*, Bianca Lopes Cavalcante-Leao2, Killian Evandro Cristoff3 and Jose Stechman-Neto2
1Department of Basic and Oral Biology, Dentistry School of Ribeirao Preto, University of Sao Paulo, Brazil
2Center for Diagnosis and Treatment of Temporomandibular Joint Disorders, Tuiuti University of Parana, Brazil
3UNESC, Vilhena, Brazil
*Correspondance to: [email protected]Fulltext PDF
Context: EMG test can be used as an auxiliary method to diagnose TMDs, as it detects and graphically records the electrical potential created when the muscle fibers are activated by the neuromuscular system, and the results provide information about contraction, tone and muscular fatigue, mandibular movements by gnathography and articular noises by sonography. Aim: To analyze if the electrical activity of the masseter and temporal muscles, present a statistically significant variation when in the presence of TMD, besides the presence of muscular fatigue, mandibular movements and joint noise in individuals with TMD. Settings and Design: The sample consisted of 37 individuals, 20 were individuals of the observational group and 17 of the control group. Materials and Methods: Data were obtained in: rest and Maximum Voluntary Contraction (MVC), opening, closing, lateralities and protrusion. Statistical Analysis: The difference between the rest and MVC measurements was verified and the relationship of the variables with the presence of TMD was organized and submitted to statistical analysis using SPSS (IBM Statistic 20.0). Results: Statistically significant values were observed at MVC (p=0.007), MVC in right masseter (p=0.002) and left (p=0.005) and right temporal (p=0.048), in the difference between rest and MVC in right masseter (p=0.001) and left (p=0.007) and in the presence of fatigue (p=0.000), deviation/ deflection (p=0.000) and masticatory tendency (p=0.000). Conclusion: Individuals with TMD had higher muscle electrical activity at rest and lower in function, presented more fatigue and unilateral mastication, as well as greater presence of deviation/ deflection and joint noise than control group.
Diagnosis; Masticatory muscles; Electromyography; Temporomandibular joint
Cardoso AHLS, Cavalcante-Leao BL, Cristoff KE, Stechman-Neto J. Influence of Temporomandibular Disorder in the Stomatognatic System: Electromyography, Mandibular Movements and Articular Sounds Analysis. J Dent Oral Biol. 2020; 5(4):1173. ISSN: 2475-5680.