Effect of Graphene on Strength of Resin- Modified Glass Ionomer

FDI World Dental Congress 2024, İstanbul, Türkiye, 12 - 15 Eylül 2024, cilt.74, ss.122, (Özet Bildiri)

AIM or PURPOSE: Graphene oxide is a material used in the

strengthening of dental materials. The study aimed to evalu-

ate the effect of adding graphene oxide on the compressive

strength of RMGIC.

MATERIALS and METHOD: Experimental RMGIC was pre-

pared by adding graphene oxide to the powder of RMGIC (Fuji

II LC, GC) with different weight ratios (1, 3, and 5 wt%). The

ten specimens were prepared from each test group (4 mm in

diameter and 6 mm in height) and stored in distilled water at

37°C for 24 h before testing. The compressive strength test

was carried out using the universal testing machine that had

a crosshead speed of 1.0 mm/min (Autograph AGS-X, Shi-

madzu). The specimens were placed with their flat ends

between the plates of the testing machine, so the progres-

sively increasing compressive load was applied along the

long axis of the specimens. The compressive strength was

calculated by recording the maximum load when the speci-

mens fractured. The data were statistically analyzed using

one-way ANOVA, followed by Tukey’s post hoc test (p=0.05).

RESULTS: Adding 1% graphene oxide did not affect the com-

pressive strength of RMGIC (p>0.05). Adding 3 and 5% gra-

phene oxide increased the compressive strength of RMGIC

(p<0.05). The highest compressive strength was observed in

the 5% graphene oxide added group (p<0.05).

CONCLUSION(S): Adding graphene oxide to the powder of

RMGIC increased its compressive strength depending on the

adding ratio. Increasing the graphene oxide in the powder

may improve the compressive strength.