%0 Journal Article
%A Azcarate-Velázquez, Francisco
%A Castillo De Oyague, Raquel
%A Oliveros-López, Guillermo
%A Torres-Lagares, Daniel
%A Martínez González, Álvaro-José
%A Pérez-Velasco, Andrea
%A Lynch, Christopher D
%A Gutiérrez-Pérez, José-Luis
%A Serrera-Figallo, María-Ángeles
%T Influence of bone quality on the mechanical interaction between implant and bone: a finite element analysis
%D 2019
%@ 0300-5712
%U https://hdl.handle.net/20.500.14352/113242
%X Objectives: To evaluate the influence of bone type in terms of bone density and cortical bone thickness, on the stresses induced by two implants under compressive and oblique loads.Methods: A numerical simulation technique based on the finite element method was applied. Two implant types (M-12 and Astra Tech) were introduced in a model matrix whose geometry was extracted from a real CBCT radiograph of the posterior mandibular region. The Young's module and Poisson's coefficient of the bone qualities described by Misch were calculated. Loads with amplitude of 400 N were exerted in two directions: compressive and 15° oblique to 5 mm above the uppermost part of the implant.Results: The von Misses variant was analysed. Both implant types presented greater tension in the ​​cortical bone area than in the ​​trabecular bone region under compressive loading. For the oblique load condition, the stresses obtained in the cortical zone were significantly higher than those registered as a consequence of compressive loads in both implant types.Conclusions: Regardless of bone type, the M-12 implants presented lower tensions in the cortical bone than did the Astra implants. The tensions recorded for D3 and D4 bone types in the trabecular zone surrounding the M-12 implants were greater than those recorded for the Astra implants.Clinical significance: For both compressive and oblique loads, good mechanical behaviour was observed. The decrease in bone quality determines a worse stress distribution, and the cortical bone is overloaded. An efficient distribution of the forces may increase the implants' longevity.
%~