Electromyographic activity of masticatory muscles in girls at pubertal age (with and without disorders of reproductive system)

Abstract

Processes of active and rapid growth, including growth of dento-facial region, formation of reproductive system and constitutional type occur at pubertal age under control of sex hormones. Disorders in functioning of hypothalamic-pituitary system can cause violations in reproductive system formation, decreasing of mineral bone mass, somatic diseases, including malocclusions. The aim of our study was to investigate the differences in EMG-activity of the masseter and anterior temporalis muscles in girls with disorders of reproductive system and without. The study group included 32 girls of puberty age with reproductive health disorders. The average age of girls in the study group was 14,66±0,3 years. All subjects were evaluated by the same examiner, according to the Research Diagnostic Criteria for TMD RDC/TMD. Recording of sEMG of masticatory muscles was performed according to the recommendations Sforza et al. and Tartaglia. Significant difference is investigated in EMG-activity of the masseter and anterior temporalis muscles between girls with disorders reproductive system and without. 93,8% adolescents of the study group had TMD group Ia and Ia plus IIa. In all girls of the study group increased and unbalanced activity of masseter and anterior temporalis muscles on right and left sides was diagnosed.