Szukana fraza: [Abstrakt = "er, there is still a lack of direct assessment of occlusal correction and their impact on the condition and symmetry of the masticatory muscle tone. Therefore, the results obtained in this study can complement the research conducted so far in the field of disorders of the masticatory system \- both from the cognitive and practical point of view. Aims The aim of the study was to prove the effectiveness of procedures correcting the occlusion by selective grinding of premature occlusal contacts \(group I\) and the reconstruction of tooth crowns using a composite material \(group II\) through the results of electromyographic testing. The conducted research is to answer the following specific questions\: 1. Will the selective grinding of premature occlusal contacts and the composite reconstruction of the tooth crowns have a positive effect on the reduction of masticatory muscle activity\? 2. Will the applied prosthetic methods result in achieving masticatory muscle tension symmetry\? The key in the comparative assessment was the verification of the level of electrical activity of the masseter muscles before and after the prosthetic correction of occlusion disorders and the determination of their asymmetry index. In the case of corrective procedures, the restoration of the correct function of the masticatory muscles and thus the improvement of the dynamics of mandibular mov"]

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