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Original Research

Open Access

The effects of gastric acid on pediatric restorative materials: SEM analysis

  • Merve Abaklı İnci1,*,
  • Hazal Özer1
  • Hemra Nur Özaşık1
  • Merve Koç1

1Department of Pediatric Dentistry, Necmettin Erbakan University Faculty of Dentistry, 42090 Konya, Turkey

DOI: 10.22514/jocpd.2023.064 Vol.47,Issue 5,September 2023 pp.145-151

Submitted: 17 April 2023 Accepted: 19 May 2023

Published: 03 September 2023

*Corresponding Author(s): Merve Abaklı İnci E-mail:


In this study, we aimed to demonstrate changes in the surface roughness and microhardness of three different restorative materials routinely used in pediatric dentistry (composite, compomer and resin-modified glass ionomer cement (RMCIS)) in response to continuous daily exposure to gastric acid. Twelve samples of each of type of restorative material were prepared. Eleven of the specimens were included in the gastric acid cycle. The microhardness and surface roughness of ten samples were measured before and after the cycle. Another sample included in the cycle was compared with the sample not included in the cycle by scanning electron microscopy (SEM). There was a significant difference between the groups in terms of roughness scores following gastric acid cycle (p = 0.039). RMCIS material possessed the highest roughness value. A significant difference was identified in terms of microhardness levels before and after the gastric acid cycle (p = 0.001). The most significant change was observed in the compomer material. SEM analysis, performed after the gastric acid cycle, revealed that most cracks were identified in RMCIS material; this was followed by compomer and composite materials, respectively. Our analysis indicates that the restorative materials used frequently in pediatric dental procedures, show increased surface roughness and reduced microhardness when exposed to gastric acid.


Gastric acid; Microhardness; Surface roughness; Composite; Compomer; Resin modified glass ionomer cement

Cite and Share

Merve Abaklı İnci,Hazal Özer,Hemra Nur Özaşık,Merve Koç. The effects of gastric acid on pediatric restorative materials: SEM analysis. Journal of Clinical Pediatric Dentistry. 2023. 47(5);145-151.


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