Effect of acidic drinks on flexural strength, microhardness, and roughness of composite resins

Main Article Content

Araceli Acevedo-Contreras
https://orcid.org/0009-0009-5241-6845
Abigailt Flores-Ledesma
https://orcid.org/0000-0002-8136-4820
Irandy del Rocio Herrera-Herrera
https://orcid.org/0009-0001-0729-2486
Yoshamin A. Moreno-Vargas
https://orcid.org/0000-0001-9181-7910
Miguel Ángel García
https://orcid.org/0000-0002-5320-159X
Jacqueline Adelina Rodríguez-Chávez
https://orcid.org/0000-0003-1010-5044
Gloria P. Perea-González
https://orcid.org/0000-0002-8173-2216

Abstract

Introduction: Currently the intake of acidic drinks has shown an important effect on dental tissues’ demineralization; additionally, these beverages may also affect some properties of the composite resins. Objective: To compare the effect of acidic drinks on the flexural strength, microhardness, and roughness of composite resins. Material and methods: Forty bars of nanohybrid resin (Filtek™ z250 XT Nano hybrid universal restorative, 3M™ ESPE) were made to evaluate flexural strength (ISO 4049-2019) and sixty discs, twenty for microhardness test and forty for roughness test; the samples were distributed in 3 groups according to the type of drink (G1=distilled water, G2=Coca-Cola®, G3=Power Ade®). The samples were exposed to the drinks for 14 days for 2 hours per day and stored at 37° C. Microhardness was determined using the Vickers HV scale (50gf-30s). Roughness in the Ra parameter was measured in a roughness tester (0.25mm/s- cutoff distance 0.25mm-5×). The pH of the beverages was measured with a potentiometer to relate it to the mentioned tests. Results: Flexural strength did not show statistically significant differences between groups; G1- 115MPa, G2- 107MPa, and G3- 102MPa, elastic modulus showed G1- 5.4GPa, G2- 6.3GPa and G3- 6.6GPa, p<0.05. Microhardness results showed G1- 116HV 0.05/30, G2- 105HV 0.05/30 and G3- 113HV 0.05/30. In Ra roughness values were G1- 0.46µm, G2- 0.28µm, and G3- 0.27µm, p<0.05. The pH was 7.01 in G1, 2.55 in G2, and 3.44 in G3. Conclusions: The intake of acidic drinks does not affect the flexural strength and elastic modulus of composite resins, but they do produce a change at a micrometrical level such as surface microhardness and roughness.

Article Details

How to Cite
Acevedo-Contreras, A., Flores-Ledesma, A., Herrera-Herrera, I. del R. . ., Moreno-Vargas, Y. A., García, M. Ángel ., Rodríguez-Chávez, J. A., & Perea-González, G. P. (2025). Effect of acidic drinks on flexural strength, microhardness, and roughness of composite resins. Revista Odontológica Mexicana, 29(2). https://doi.org/10.22201/fo.1870199xp.2025.29.2.90719

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