Evaluation of the Effect of Nanoparticle Graphene Oxide on Flexural Strength of Glass Ionomer Cements

Abstract

Aim. Glass ionomer (GIC) is a widely used restorative material in dentistry, but it has relatively weak mechanical properties. In this research, the effect of graphene oxide (GO) on the flexural strength of GIC was investigated. Materials and Methods. In this experimental study, 60 GIC samples in 6 groups of 10 were prepared, including Group 1: control conventional glass ionomer (CGIC), Group 2: CGIC + 1% wt of GO, Group 3: CGIC + 2% wt of GO, Group 4: control resin-modified glass ionomer (RMGI), Group 5: RMGI + 1% wt of GO, and Group 6: RMGI + 2% wt of GO. The samples were kept for 24 hours. The flexural strength of the samples was measured by using a universal testing machine. Data were analyzed by two-way ANOVA and posthoc Tukey test. ( P < 0.05 ). Results. In the RMGI groups, the mean flexural strength value of the RMGI + 2% GO group was significantly higher than that of the RMGI control group ( P = 0.027 ). In the comparison of RMGI groups with their corresponding CGIC groups, the mean flexural strength values of all RMGI groups were significantly more than CGIC groups ( P < 0.001 ). RMGI + 1% GO was not significantly different from control RMGI and RMGI + 2% GO ( P = 0.802 , P = 0.395 , respectively). There was no significant difference between CGIC groups. Conclusion. Adding 2% by weight of GO to RMGI increases the flexural strength of RMGI, which could be of great importance in clinical practice in order to reinforce the mechanical properties of this dental material. The flexural strength of RMGI is higher than that of CGIC.

Assessing the Impact of Nano‐Graphene Oxide Addition on Surface Microhardness and Roughness of Glass Ionomer Cements: A Laboratory Study

“…The findings revealed that incorporating 2% by weight of GO into RMGIC led to an increase in its flexural strength. This finding holds significant clinical significance as it offers a means to enhance the mechanical properties of RMGIC, potentially improving its performance as a dental material [ 21 ]. Furthermore, the incorporation of 1% nGO into CGIC and RMGIC resulted in a notable decrease in gingival microleakage for CGIC and both occlusal and gingival microleakage for RMGIC.…”

The impact of non dental glass fiber addition against tensile strength pre-polymerized fiber reinforced composite

“…FRC is a composite material made of polymer matrix, and is reinforced by fiber, which has tensile strength as well as high flexural strength 6 . The benefit of FRC is the minimum intervention, aesthetic compared to the metal dan can be done in one visit 7 . The addition of fiber as reinforcing material in composite resin has several benefits such as improving the strength and stiffness, durable against the fracture, able to lower the shrinkage 8 .…”

Orientation and Type of Non-dental Glass Fiber Towards The Flexural of Fiber Reinforced Composite

“…Fiber reinforced composite is currently more widely used than porcelain fused to metal fixed prostheses, because of the increased demand for conservative and aesthetic restoration that is convenient because the restoration can adhere effectively to the teeth and cause minimal damage to the remaining teeth 1,2 . Fixed denture fiber reinforced composite is also chosen because it can be made directly in the clinic without going through laboratory procedures, and the nature of the material that does not corrode like metal material 3 .…”

“…Fiber reinforced composite is a restoration consisting of a combination of fiber and resin matrix 1 . FRC in dentistry is widely applied to the base of removable denture made of acrylic resin, as a reinforcement of fixed dentures, periodontal splints, fixed orthodontic retainer and dental restoration 4 .…”

“…The resin matrix acts fiber protectors, geometric settings and maintains that the fiber remains in a predetermined position, to provide optimal strength. Fiber in the composite matrix acts as an amplifier, providing stability and stiffness to improve the structural properties of the material and crack stopper 5,1 .…”