Comparative characteristics of the properties of dental implants depending on the design, shape and surface in the experiment.

THE AIM OF THE STUDY: Compare the properties of different dental implants depending on the design, shape and surface area in the experiment. MATERIALS AND METHODS: Dental implants with similar sizes (5.5×10 mm) were selected: Vitaplant VPKS, Mega Gen AnyRidge and Alpha Dent Superior Active. The calculation of the total area of the implants was performed and the implants were immersed in a ferromagnetic substance. RESULTS AND DISCUSSION: The small number of turns and their small length of the Vitaplant implant cannot create a large surface area (this size of the implant has an area of 174.7 mm2). On the thin, slightly conical body of the MegaGen implant (North Korea), the developer placed 10 turns of thread with wide blades. Due to the data design features, this implant has the largest surface area (276.5 mm2), which is an advantage in implant integration. The same number of turns (10) and a very similar frequency bring Alpha Dent implants (Germany) closer to the implant described above, but the design implements an innovative anti-rotation system. This implant size has a total surface area of 210.5 mm2. CONCLUSIONS: The implant Vitaplant VPKS is inferior in efficiency of the geometry of the implant Mega Gen AnyRidge by 24%, and the implant Alpha Dent Superior Active in turn ahead of the efficiency of the representative of the Korean company by 8.9%. The shape of the geometry of the implant affects the effectiveness of counteracting the masticatory load more than its surface area.

Mathematical modeling of the elastic properties of the mucous flaps in conducting patchwork operations of the oral cavity.

OBJECTIVE: Introduction: To date, there are techniques that allow dental surgeons to restore the lost volume of bone mass, but the level of complications during augmentation remains consistently high. One of the main types of postoperative complications is the exposure of bone augmentate and its infection as a result of ischemic or destructive processes in the mucous shreds, which cover the augmentate, resulting from their overgrowth. The aim: The purpose of our research was to increase bone augmentation effectiveness in patients with secondary edentulism and to reduce risk of postoperative complications caused by ischemia of the mucous membranes because of their tension by mathematical simulation of tensile limits and permissible deformation for the mucous membranes of the oral cavity. PATIENTS AND METHODS: Materials and methods: As a research method was selected a two-component Mooney-Rivlin model, taking into account the indicators of elasticity and static strength of flat samples in tension, which allows them to perform hyperprime behavior at small and moderate deformations. For computer simulation of epithelial flap deformation during operation by finite element method we used ANSYS software environment. RESULTS: Results: Since elastic forces are potential, the work of forces does not depend on the way of tension. Only the initial and final states of the sample, i.e. its initial and final forms, play a role. CONCLUSION: Conclusions: The flap of 30 × 25 mm can be stretched and thus it is necessary to eliminate the deficit of fabric up to 5 mm wide in the direction of the Y axis (vertical axis). The relative elongation is λ = 25/20 = 1.25. The flap tension first occurs in the y direction.