Research of biomechanical system “Dentition - splint” rigidity using CAD/CAE

Abstract

The objective of the study is to determine the optimal position of the splinting construction of the maxillary dentition in children at mixed occlusion depending on the formation of the root and dual directions of functional load of the teeth. The object of the study is threedimensional computer models of the biomechanical system (BS) of the maxilla with a splinting system for dentition fixing. To meet the targets, models of tensely-deformed state (TDS) of the maxilla BS with splinting structures of the dentition have been made using CAD / CAE methods and computed tomography (CT) data. Due to analysis of the results obtained, the qualitative characteristics of displacement and stress fields were established. Teeth having 70 % of unformed root are less capable of impact under the pressure of compression and bending. The system exhibits a greater resistance at 2.8 times to the compression of the Рzi than the bend of Pyi. The absence of contact contributes to the mobility of the system at 1.5 times. The pathogenetic factors that influence the rigidity of the splint fixation on the injured teeth have been identified including a degree of root formation, the direction of the force impact, the position of the splint on the crown of the tooth, the presence of contact between adjacent teeth.