Abstract
Healthy subjects have a prevalent side on which they display higher-muscle activity during clenching. The relationship between symmetry of masseter muscle (MM) and anterior temporalis (TA) muscle activities and occlusion has been evaluated on the basis of physiological parameters. The aim of the present study was to investigate whether the symmetry of surface EMG (sEMG) activity in asymptomatic young adults is related to symmetry of occlusal contacts. Material. The study population consisted of seventy-two 18-year-old subjects with no temporomandibular disorder (TMD) symptoms. Method. All the participants underwent an sEMG recording with an 8-channel electromyograph (BioEMG III). A T-Scan III evolution 7.01 device was used to analyze the occlusal contact points. Results. The correlation between the activity of right (R) and left (L) TA and the percentage of occlusal contacts was assessed, but no significant differences were found between the RMM and LMM muscles. The differences in the medium values of sEMG between males and females were not statistically significant. Equilibrated muscular activity between RTA and LTA occurred when occlusal contacts reached the percentage of 65% on the left side. Conclusion. The symmetry of sEMG activity in asymptomatic young adults is not related to symmetry of occlusal contacts.
Highlights
Temporomandibular disorders (TMDs) most o en manifest with a muscular abnormality which can be analyzed by surface electromyography [2], but Suvinen and Kemppainen concluded that until electromyographic measures are correlated with other multidimensional, especially subjective and pain-related methods, the clinical use of this method for the diagnosis of temporomandibular disorder (TMD) is not at present recommended [3]
Klasser and Okeson in their comprehensive review produced results which show that the clinical use of surface electromyography (sEMG) in the diagnosis and treatment of TMD is of limited value [4]
E aim of the present study was to carry out such a study by investigating whether symmetry of sEMG activity in BioMed Research International asymptomatic young adults is related to symmetry of occlusal contacts
Summary
E stomatognathic system (SS) is responsible for such functions as speech, chewing, and swallowing, which remain in equilibrium in healthy individuals. Temporomandibular disorders (TMDs) most o en manifest with a muscular abnormality which can be analyzed by surface electromyography (sEMG) [2], but Suvinen and Kemppainen concluded that until electromyographic measures are correlated with other multidimensional, especially subjective and pain-related methods, the clinical use of this method for the diagnosis of TMD is not at present recommended [3]. E study was initiated a er the subjects had signed informed consent forms, and the research program had been approved by the Ethical Committee of Jagiellonian University KBET//89B/2009. It was conducted in accordance with the Declaration of Helsinki. E inclusion criteria were as follows: a full dental arch, no symptoms of TMD based on an RDC/TMD examination, and compatible occlusal and skeletal classes
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
