Acid Buffer Capacity and Compressive Strength of Bioactive Restorative Materials in the Cariogenic pH Solution

Yosi Kusuma Eriwati, Windy Almyra Hanyouri, Martin Dharma, Bambang Irawan

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review


New bioactive materials were developed with claims of potential remineralization in the oral environment, particularly in acidic conditions. Direct bioactive restorative materials should resist mechanical load from mastication in saliva pH changes. However, the lack of evidence still exists on its bioactive ability to prevent demineralization. The purpose of this study was to evaluate the effects of cariogenic pH solution on acid buffer capacity and compressive strength of bioactive restorative materials. Thirty disc-shaped specimens of 5 commercial bioactive restorative materials were selected (diameter 15mm; thickness 1mm) and were immersed in 10ml of cariogenic pH solution (pH 4.7) at 37 ± 1o C. They were then evaluated for its buffer capacity using a pH meter every 30, 60, 90, 120, and 150 minutes respectively. Twelve specimens (diameter 4mm; height 6mm) of each material were immersed in a group of cariogenic pH solutions with pH 7 and 4.5 for 7 days. The compressive strength was tested using Universal Testing Machine and statistically analyzed by One-way ANOVA and Kruskal Wallis. The results showed an increase in pH of the cariogenic solution of all materials and an increasing immersion time. The compressive strength of Activa Bioactive Restorative had the lowest value after immersion in cariogenic solution pH 4.5. It can be concluded that bioactive restorative materials have a buffering capacity that can increase cariogenic pH solution towards neutral conditions within 150 minutes of immersion. Alkasite composite resin and Zirconomer Improved immersed for 7 days in cariogenic pH solution to stay stable at pH 4.5 and 7.

Original languageEnglish
Title of host publicationMaterials Science Forum
PublisherTrans Tech Publications Ltd
Number of pages7
Publication statusPublished - 2022

Publication series

NameMaterials Science Forum
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752


  • Bioactive restorative material
  • buffer capacity
  • cariogenic pH solution
  • compressive strength
  • immersion time


Dive into the research topics of 'Acid Buffer Capacity and Compressive Strength of Bioactive Restorative Materials in the Cariogenic pH Solution'. Together they form a unique fingerprint.

Cite this