2nd International Scientific-Practical Conference "Digital or Conventional?
What is more effective?" 17-18 January 2025, Kaunas, Lithuania

REVIEWS

Influence of surface treatment on the survival rate of miniscrews: A systematic literature review and
meta-analysis
Kotryna Rumšaitė, Mariam Varoneckaitė, Mantas Šidlauskas, Marijus Leketas, Algirdas Lukošiūnas, Ričardas Kubilius
30-36

SCIENTIFIC ARTICLES

Effect of simulated gastric acid on the surface degradation of dental ceramics
Noelia Madriz-Montalván, Marine Ortiz-Magdaleno, Norma Verónica Zavala-Alonso, José Elías Pérez-López, Gregorio Sánchez-Balderas, Diana María Escobar-García, Erika de Lourdes Silva-Benítez, Gabriel Fernando Romo-Ramírez
37-45

Prevalence of malocclusions in children with infectious mononucleosis
Natalya Chukhray, Nina Smolyar, S. V. Savchyn, O. O. Mashkarynets
46-50

CASE REPORTS

Conservative therapy for odontogenic keratocyst: Decompression as the definitive treatment
Anibal Henrique Barbosa Luna, Karoline Gomes da Silveira, Alexander Tadeu Sverzut, Márcio de Moraes
51-54

Stomatologija 2024; 26 (2): 37-45 1401 KB

Effect of simulated gastric acid on the surface degradation of dental ceramics

Noelia Madriz-Montalván¹, Marine Ortiz-Magdaleno¹, Norma Verónica Zavala-Alonso², José Elías Pérez-López³, Gregorio Sánchez-Balderas³, Diana María Escobar-García⁴, Erika de Lourdes Silva-Benítez⁵, Gabriel Fernando Romo-Ramírez¹

Summary

Objective. The aim of this study was to compare the effect in vitro of simulated gastric acid solution on the roughness, microhardness and micro-structural topography surface of two dental ceramics: lithium disilicate glass-ceramic and monolithic zirconium dioxide (ZrO₂) at baseline and after different immersion time.

Materials and methods. Lithium disilicate and ZrO₂ glass-ceramic discs were fabricated (40 of each one) and was evaluated under microscope the roughness (Atomic force microscopy), microhardness (Vickers hardness tester) and micro-structural topography surface (Scanning electron microscopy) before immersion (baseline) and after three periods of immersion: 8 h 25 min, 46 h 2.5 min and 92 h 5 min in simulated gastric acid solution of hydrochloric acid (HCl, 0.06 M, pH 1.2) at 37 ºC. The ceramics were compared over time with a repeated measures analysis of variance (ANOVA).

Results. Statistically significant changes (P<.05) were found in the microhardness values between both ceramics, which decreased after all times points of immersion in simulated gastric acid solution, ZrO₂ showed higher microhardness mean values (P<.05) but lithium disilicate showed significant changes (P <.05) in the surface microhardness at baseline versus the three immersion times. Lithium disilicate had higher roughness values than ZrO₂ (P<.05), which increased after 8 h 25 min of immersion; however, after 46 h 2.5 min and 92 h 5 min of immersion, the roughness decreased. More microporosities were observed in the lithium disilicate surface than with ZrO₂.

Conclusion. The simulated gastric acid solution of HCl affected the roughness, microhardness and micro-structural topography surface of both lithium disilicate and ZrO₂, but greater surface degradation was presented lithium disilicate.

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¹Department of Aesthetic, Cosmetic, Restorative, and Implantological Dentistry, Faculty of Dentistry, Autonomous University of San Luis Potosí, San Luis Potosí, Mexico
²Department of Dental Science Advanced Education, Faculty of Dentistry, Autonomous University of San Luis Potosí, San Luis Potosí, Mexico
³Laboratory of Polymers, Institute of Physics, Autonomous University of San Luis Potosí, San Luis Potosí, Mexico
⁴Department of Laboratory of Basic Science, Faculty of Dentistry, Autonomous University of San Luis Potosí, San Luis Potosí, Mexico
⁵Laboratory of Engineering and Materials Science, Faculty of Dentistry, Autonomous University of San Luis Potosí, San Luis Potosí, Mexico

 

Address correspondence to Marine Ortiz Magdaleno, Faculty of Dentistry, Autonomous University of San Luis Potosí, Av. Dr. Manuel Nava #2, Zona Universitaria, 78290, S.L.P. México.
E-mail address: marine.ortiz@uaslp.mx