Numerical study of the stress-strain state of surgical templates

The paper considers the designs of surgical templates for dental implantation in the absence of two teeth (included defect). Virtual models of 2 template variants were selected: a universal template modeled by software in automatic mode (option 1) and a template modified in manual mode (option 2). In calculations in all variants, the force exerted on the template when drilling at the specified application points was 30 N. The numerical studies used the physico-mechanical values of materials used in the technology of additive manufacturing of navigational surgical templates after sterilization. The problem was solved in a linear elastic formulation by the finite element method. Comparison of the numerical calculations for displacements and stresses for different designs of templates (option 1 and option 2) from the materials FormLabs Dental SG Resin (Formlabs, USA) and HARZLabs Yellow Clear PRO (Russia) showed a clear advantage of option 2 (reinforced template), and the stresses values turned out to be the same for both versions of templates made from foreign and domestic materials; the difference in displacements was 7—8%.