Rationale for the use of a novel structure device for mandible fractures fixation

Abstract

The finite element method in the Ansys Workbench system was used to solve static problems of the theory of elasticity, simulating the stress-strain state of the “bone-fixing device” systems under the action of the chewing, temporal, lateral pterygoid, and medial pterygoid muscles. The stability of each of the considered fixing devices was quantitatively assessed, the relative displacements of bone fragments, equivalent stresses in the bone and fixing devices were calculated and compared, and the contact pressure between bone fragments was investigated.
 It is shown that with the considered oblique fracture and the considered loads, the fixation device of a new type provides similar stability in comparison with the 3D plate. It was revealed that the fixation device of a new type, in comparison with the 3D plate, provides a higher contact pressure and a tighter contact between fragments. Equivalent stresses in the bone structures during the installation of the new type of fixation device were found to be lower than in similar bone structures during the installation of the 3D plate.