Stability, Micromotion, and Microstrain in Short Implants with High C/I Ratios: Combined In Vitro and Finite Element Analysis Approach

doi:10.11607/jomi.11547

Q3 · DentistryImpact Factor · 1.088

AutoresDaniel Robles, Saray Férnandez-Hernández, Miquel Punset, Meritxell Molmeneu, Javier Gil, Esteban Pérez-Pevida, Artiza Velasco

Por qué importa

Este estudio explora el comportamiento biomecánico de implantes dentales cortos de 4 mm en comparación con otros de mayor longitud (6, 8 y 10 mm), centrándose en escenarios de alta relación corona/implante (C/I). Se evaluaron la estabilidad del implante, la micromovilidad bajo carga y la microdeformación del hueso periimplantario mediante un enfoque combinado in vitro y de análisis por elementos finitos. Los resultados indican que los implantes más cortos y con relaciones C/I elevadas presentan mayor micromovilidad y microdeformación. Sin embargo, la técnica deitats de puentes protésicos con materiales como PMMA demostró ser una estrategia eficaz para reducir estos parámetros, mejorando el rendimiento de los implantes cortos hasta niveles comparables a los implantes más largos. La investigación aporta datos relevantes para la toma de decisiones clínicas en la rehabilitación con implantes cortos y altas demandas estéticas o protésicas.

Abstract original

PURPOSE: To evaluate the biomechanical behavior, implant stability, micromotion under loading, and peri-implant bone microstrain of short dental implants (4 mm) compared with longer implants (6, 8, and 10 mm), particularly in high crownto- implant (C/I) ratio scenarios, and to assess the effect of prosthetic splinting as a biomechanical strategy. MATERIALS AND METHODS: A total of 50 implants with internal connections (4-, 6-, 8-, and 10-mm implants) were placed in 9 fresh bovine ribs and restored with standardized polymethyl methacrylate (PMMA) crowns to achieve C/I ratios of 1.22 for 10-mm implants, 1.77 for 8-mm implants, 2.7 for 6-mm implants, and 4.55 for 4-mm implants. A maximum of six implants were placed in each rib, with a 6-mm distance between implants in all cases. Using resonance frequency analysis (RFA) and controlled loading (50 N, 6-degree angulation), implant stability and micromotion were evaluated via image-based analysis. Subsequently, a subset of 4-mm implants was tested with a splinted PMMA bridge. Finite element analysis (FEA) using models consistent with the in vitro setup was performed to evaluate bone microstrain, von Mises stress, and displacement. RESULTS: Implant stability (implant stability quotient [ISQ] values) increased significantly with implant length, with the 10-mm group having the highest values (mean ISQ = 68.4) (P < .05). Micromotion and FEA displacement were inversely correlated with implant length and positively correlated with the C/I ratio. The 4-mm implants had significantly higher micromotion and microstrain values, but splinting significantly reduced both parameters and achieved a performance comparable to that of longer implants. Von Mises stress values in the peri-implant bone and abutments were highest in the 4-mm group. CONCLUSIONS: Short dental implants correlate with poorer values for implant stability than conventional implants. High C/I ratios in short implants are associated with increased micromovement and micro

Leer texto completo ↗DOI · 10.11607/jomi.11547

Autores Doctor&Cols

Cómo citar

Robles D, Férnandez-Hernández S, Punset M, Molmeneu M, Gil J, Pérez-Pevida E, et al. Stability, Micromotion, and Microstrain in Short Implants with High C/I Ratios: Combined In Vitro and Finite Element Analysis Approach. The International Journal of Oral & Maxillofacial Implants. 2025. doi:10.11607/jomi.11547