FLEXURAL STRENGTH OF RESINOUS CEMENTS: IN VITRO EVALUATION

Noa-Yarasca S.; López-Flores A. · Revista Cientifica Odontologica (2025) · DOI: 10.21142/2523-2754-1301-2025-228

Resumen

Objective: To evaluate the flexural strength of three dental resin cements. Materials and methods: Sixty bars measuring 25x2x2 mm were made of RelyX-U200, Relyx™ Universal and Duo-Link Universal cements. These bars were divided into 3 groups according to brand (n=20) and were kept in distilled water for 24 hours at 37ºC. The 3-point bending test was carried out, according to ISO 4049, in a universal testing machine at a speed of 0.5 mm/min until fracture. Statistical analysis was performed with the Python statistical package, using the one-way Anova test and Tukey's multiple comparisons test with a confidence level of 95%. Results: Duo-Link Universal cement obtained the highest average with respect to flexural strength (104.7±7.8 MPa). Statistically significant differences were found between the three groups (p< 0.001). These differences were present between Relyx™ Universal-Duo-Link Universal (p<.001) and Duo-Link Universal – RelyX U200 (p<.001) cements, while no statistically significant differences were found between Relyx™ Universal and RelyX U200 cements. Conclusion: Duo-Link Universal cement presents greater flexural strength compared to RelyX-U200 and Relyx™ Universal cements. The results indicate that Duo-Link Universal is ideal for restorations requiring high flexural strength, offering greater clinical durability, especially in areas of greater functional load and extensive restorations such as indirect prostheses or posts. © Las autoras, 2025.

Instituciones: Universidad Científica del Sur