engleski

Remineralization Effect of Ion-Releasing Materials by CT Analysis; a Pilot Study

Introduction: To determine the possibility of assessing through CT analysis the remineralization of dentin induced by modern ion-releasing restorative materials. Materials and methods: Five different ion- releasing restorative materials were examined ; a glass ionomer cement (GC Fuji TRIAGE®, Riva Self Cure), two glass hybrid cements (EQUIA Forte® HT, Riva Self Cure), a calcium silicate-based cement (Biodentine®) and an alkasite material (Cention® Forte). For the control group, a conventional resin composite (3M ™ Filtek ™ Universal) was used. Three extracted human third molars were used for the study. After removing the upper third of the crown with a diamond saw, five cavities with a diameter of 1 mm and a depth of 1.5 mm were made in dentine. The entire dentin surface, except the cavities, was isolated with an acid-resistant varnish, and the teeth were then immersed in a demineralizing solution for two weeks: 0.0476 mM NaF, 2.2 mM CaCl2 2H2O, 2.2 mM KH2 PO4 , 50 mM acetic acid CH3 COOH and 10 mM KOH at pH 5.0 (37 0 C). The cavities were then filled with one of the test materials ; one tooth served as a control. Teeth were left in saline for two weeks. CT analysis of the samples was performed three times ; before demineralization, after demineralization and after the incubation period. The density of dentin at the bonding interface with the material was assessed via CT. Results: CT analysis showed differences in dentin density during different measurements, but it was not accurate enough to determine differences between test groups. Conclusion: Although CT analysis can determine the remineralization effect of materials, a more precise method is needed to quantify their action. The research was conducted within the Croatian Science Foundation project ‘Research and De- velopment of New Micro and Nanostructural Bioactive Materials in Dental Medicine’, BIODENTMED No. IP-2018-01-1719. Key words: ion- releasing materials, remineralization, dentine, CT analysis

ion-releasing materials ; remineralization ; dentine ; CT analysis

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