Objective: To propose a methodology based on virtual simulation to assist in the design proposals of dental implants. Methods: The finite element method (FEM) was used to analyze the biomechanical dental implant system behavior, determining von Mises stress distribution induced by functional loads, varying parameter as load direction and geometric characteristic of the implant (taper, length, abutment angulation, thread pitch and width pitch). A final design was obtained by considering the parameters that showed improved performance. The estimated lifetime of the final design was calculated by reproducing in a virtual way the experimental fatigue test required by the ISO:14801 standards. Results: For all the studied cases, the maximum stresses were obtained in the connecting screw under oblique loads (OLs). The estimated lifetime for this critical part is at least 5 × 106 cycles, which meets the requirement of the ISO:14801. In bone tissue, the largest stresses were concentrated in cortical bone, in the zone surrounding the implant, in good agreement with previous reports. Conclusions: A dental implant design was obtained and validated through a simple and efficient methodology based on the application of numerical methods and computer simulations.
Several factors such as instability, misalignment, mechanical fractures and poor quality of bone are some factors that strongly influence the deterioration of knee implants. After a total knee replacement (TKR), proximal tibial bone suffers a resorption due to stress-shielding caused by the implant. The formation of weakening bone zones and loss of bone is one of the most clinical concerns. Then, the study, modification and improving of the simulation methods to analyze implants is a subject of the most concern. Thus, this work is focused in the analyses of the influence of the geometry and inclination of the attaching pegs in the femoral component of knee implants. The aim is to evaluate the geometry of the implant stem to improve the stresses distribution and to increase the implant lifespan. Stresses distribution at the attaching pegs of the femoral component, by considering several combinations of diameters, lengths and inclinations, have been analyzed using finite element analysis (FEA). The analysis was conducted for the [Formula: see text][Formula: see text]mm, L [Formula: see text] 13 mm and [Formula: see text] [Formula: see text] 0[Formula: see text], in three different positions of the gait cycle. The variation of the geometry of the attaching pegs generated changes in the stresses distribution in bone. As the diameter increases, the stresses decrease in the femur. The medial areas of the implant appear to be the most likely regions to show bone resorption.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.