Oleksyn K. Complex approach to diagnosis, treatment and prevention of occlusal disorders in patients with carious lesions of the teeth.

The work was based on the study of the prevalence of caries in 300 students living in regions with low fluoride level. According to the results of the preliminary examination, there were selected 45 patients with carious lesions of first molars, 45 patients with restorations of first molars excluding occlusal determinants and 30 people with intact dentitions (control group). For the treatment we used methods of direct and indirect restorations with the analysis og occlusal relations by the T-Scan Novus system (before treatment, immediately after, 6 and 12 months after treatment). The results of occlusal analysis of patients in the control group showed an even distribution of occlusal load on the teeth (8.9 (8.5–9.2) %– premolars; 13.2 (13.0–13.5) % – the first molars; 14.0 (13.8–14.3) % – the second molars). The data obtained using the T-Scan Novus system in Group 1 showed that, in dental caries of the first molar we observe a decrease of masticatory force directly on the affected tooth to 8.2 (6.7–10.1) % (р<0.05) comparing with control group (13.2 (13.0–13.5) %). The emphasis of bite force is transferred to the adjacent second molar, i.e. to the tooth with a larger area of occlusal surface, and increases to 17.2 (15.1–22.9) % (р<0.05). The occlusal analysis in patients of group 2 showed that occlusal overloading occured directly on this tooth 18.7 (17.7–21.4) % (р<0.05) and the opposite one 17.1 (15.4–17.9) % (р<0.05). The results immediately after, 6 and 12 moths after treatment of first molar indicated an even distribution of the occlusal load on the molars, namely the increase in bite force was directly proportional to the increase in the chewing surface of the tooth. Bite force on the restored molar increased to 12.6 (12.3–13.2) % (p<0.05) and decreased to 14.1 (12.8–14.8) % (p<0.05) on the adjacent second molar. The results of occlusal analysis immediately after, 6 and 12 months after re-treatment of the first molar in patients of group 2 are as follows: the absence of occlusal interferences directly on the restored molar, i.e. a reduction in the occlusal force on it to 12.4 (12.3–12.6) % (p<0.05), which resulted in the even distribution of the force on the teeth, reduction of occlusal load on the first molar to 12.6 (12.5–12.8) % (p<0.05). Key words: occlusal disorders, caries, restorations, occlusal analysis, T Scan Novus. Branch – medicine.