EXPERIENCE OF CLINICAL APPLICATION OF SURFACE ELECTROMYOGRAPHY AND LIGHT-CURING HYDROSTATIC SPLINT EASY BITE® IN ORTHODONTIC TREATMENT

This study describes the clinical experience with the use of Easy Bite® light-curing hydrostatic splint for initiating muscle relaxation and determining the therapeutic position of the lower jaw under the control of surface electromyography at the stage of occlusal splinting prior to orthodontic treatment. Surface electromyography was performed using a BTS TMJOINT apparatus from BTS Bioengineering (Italy) and the Dental Contact Analyzer software package. The article describes the interpretation of the six indices, such as POC TA, POC MM, BAR, TORS, IMP, ASIM, for the analysis of occlusion and muscle balance in a clinical example with illustrations. The developed algorithm for determining the therapeutic position of the lower jaw is described and the results of 5 months of occlusal splint therapy of a 12-year-old patient with skeletal grade 2, a vertical type of jaw growth, a skeletal reduction of the lower jaw branch on the right, aseptic necrosis and fragmentation of the articular head of the right TMJ, arthritis-arthrosis of the left TMJ, dysplasia of both TMJs on the background of undifferentiated connective tissue dysplasia are presented.