ABSTRACT
In both groups (OKL and AMPS) normalized/ standardized activity was set as the ratio of muscle potentials measured at rest (RLX) to the potential maximum voluntary contraction (MVC) and subsequently compared to the results obtained during the preliminary investigation and after 4 weeks of starting therapy
Activity normalized to MVC [μV] = RLX [μV]/MVC [μV] × 100% Activity normalized to MVIC = RLX [μV]/MVIC [μV] × 100% Asymmetry index POC (Percentage Overlapping Coefficient) = (LTA MVC − MVC RTA)/LTA MVC
× 100 [%] or (RTA MVC − MVC LTA)/ RTA MVC × 100 [%]
where 0% – lack of symmetry 100% – absolute symmetry
Application WinJaw EMG, was used for gathering, processing, and data collection. The results were statistically analysed using appropriate
1 INTRODUCTION
Ethiopatogenesis of bruxism is still not entirely clear. It’s occurrence is led by connected factors: mental tension, stress, or emotional disorders, as well as teeth-localized premature contacts, too high conservative or prosthetic restorations, occlusal trauma and elevated muscle activity that occurs as a result of the two mentioned-descent causes. The genetic factors are also taken under consideration these days. Aim of the study was to compare the effectiveness of occlusal splint and the anterior deprogrammer in bruxism therapy. Because both of this tools are commonly used in chronic muscle disorders treatment, we tried to determine the degree of tension and relaxation of muscles of the superficial temporal and masseter muscle lobes unilaterally before therapy and right after 30 days of treatment.
