Design and validation of a short-implant rehabilitation model

Abstract

Objectives: This research intended to develop and validate a digital model that could be used to study the stresses and strains created in the different components involved in oral fixed rehabilitations with short implants. The validated model was then used to simulate a clinical-like situation.Methods: A digital model was created considering the posterior areas of the mandible. Its materialization obtained ten specimens of the experimental prototype. Seven of them were static compressive tested until failure and, for the other three, the tests were progressively interrupted, to allow the establishment of a damage sequence. On the numerical model a finite element analysis was performed with Abaqus software, under similar conditions to the experimental situation. Results:The stress pattern on the FEA and the failure location on the static test were similar.The sequence in which each part reached the yield strength was the same as that observed on the interrupted static test (resin, prosthetic framework, implants and implant screws, in this order). Due to these results, the model was considered valid. A clinical-like simulation with the validated model showed that buccal cortical bone, around the implants platform, is the weakest part of such a rehabilitation.Conclusions: This research allowed the development and validation of a computer-aided design model that can be used to study an oral fixed rehabilitation supported by short im- Conclusões: Esta investigação permitiu o desenvolvimento e a validação de um modelo que permite o estudo de reabilitações fixas sobre implantes curtos. Clinicamente é importante realçar que o osso cortical é a zona que apresenta tensões e deformações mais elevadas.

Effect of crown-to-implant ratio and crown height space on marginal bone stress: a finite element analysis

“…Both tests intend to compare the mechanical behaviour of the numerical model with the experimental model. The former confirmed the sequence of failure of the models parts [67] and the last confirmed the displacement behaviour [68].…”

Effect of number of implants, distal implant inclination, and angled abutment on stresses in fixed complete dentures: a nonlinear finite element analysis

“…For example, an FEA study on the influence of bone quality on stress distribution in IFCD showed that the less compact bones (poor bone quality) increased the stresses in implants and prosthetic superstructure and decreased the stresses in trabecular bone. 19 Ferreira et al 34 aimed to validate a numerical model that could be used to study stresses and strains created in the different components involved in oral fixed rehabilitations through FEA and static compressive load test (SCLT). Analyzing the tendencies of both models, an absolute match of their biomechanical behaviors can be observed, validating the computational model.…”