Design Factors of Ti-Base Abutments Related to the Biomechanics Behavior of Dental Implant Prostheses: Finite Element Analysis and Validation via In Vitro Load Creeping Tests

doi:10.3390/ma17153746

★ Alto impactoQ1 · EngineeringImpact Factor · 4.287

AutoresJordi Martínez-Grau, Daniel Robles, Román A. Pérez, Xavier Marimon, Saray Férnandez-Hernández, Carlos Aroso, Aritza Brizuela‐Velasco

Por qué importa

Este estudio analiza cómo el diseño de los pilares Ti-base, específicamente el grosor de la pared, el ancho de la plataforma y el biselado, afecta la distribución de tensiones y deformaciones en el implante, el tornillo de retención, la base de titanio y el hueso circundante. Utilizando análisis por elementos finitos (FEA) y validación in vitro, se investigaron ocho modelos diferentes bajo cargas dinámicas simuladas. Los resultados sugieren que un biselado adecuado, una pared más gruesa y una plataforma más estrecha optimizan la distribución de tensiones. Un mayor grosor de la pared (0.4 mm) se asoció con menores valores de tensión en los tornillos de retención. Comprender estos factores de diseño es crucial para mejorar la longevidad y el comportamiento biomecánico de las prótesis implantosoportadas, minimizando riesgos de fallo en el sistema completo.

Abstract original

This study has been carried out to analyze the influence of the design of three geometric elements (wall thickness, platform width, and chamfer) of Ti-base abutments on the distribution of stresses and strains on the implant, the retention screw, the Ti base, and the bone. This study was carried out using FEA, analyzing eight different Ti-base models based on combinations of the geometric factors under study. The model was adapted to the standard Dynamic Loading Test For Endosseous Dental Implants. A force of 360 N with a direction of 30° was simulated and the maximum load values were calculated for each model, which are related to a result higher than the proportional elastic limit of the implant. The transferred stresses according to von Mises and microdeformations were measured for all the alloplastic elements and the simulated support bone, respectively. These results were validated with a static load test using a creep testing machine. The results show that the design factors involved with the most appropriate stress distribution are the chamfer, a thick wall, and a narrow platform. A greater thickness (0.4 mm) is also related to lower stress values according to von Mises at the level of the retaining screws. In general, the distributions of tension at the implants and microdeformation at the level of the cortical and trabecular bone are similar in all study models. The in vitro study on a Ti-base control model determined that the maximum load before the mechanical failure of the implant is 360 N, in accordance with the results obtained for all the Ti-base designs analyzed in the FEA. The results of this FEA study show that modifications to the Ti-base design influence the biomechanical behavior and, ultimately, the way in which tension is transferred to the entire prosthesis-implant-bone system.

Leer texto completo ↗DOI · 10.3390/ma17153746

Autor Doctor&Cols

Daniel Robles Cantero
Cirugía Oral e Implantología

Cómo citar

Martínez-Grau J, Robles D, Pérez RA, Marimon X, Férnandez-Hernández S, Aroso C, et al. Design Factors of Ti-Base Abutments Related to the Biomechanics Behavior of Dental Implant Prostheses: Finite Element Analysis and Validation via In Vitro Load Creeping Tests. Materials. 2024. doi:10.3390/ma17153746