Evaluation of the mechanical properties of conventional glass ionomer cement after the addition of casein phosphopeptide amorphous calcium phosphate: An in vitro study

Abstract

Background: Casein phosphopeptides-amorphous calcium phosphate (CPP-ACP) products have gained much importance in restorative dentistry and minimally invasive dentistry. Addition of CPP into glass ionomer cement (GIC) has been shown to interact with fluoride ions to produce an additive anticariogenic effect through the formation of stabilized amorphous calcium fluoride phosphate phase. Aim: The aim of this study was to determine the additive effect of CPP-ACP on the mechanical properties of conventional GIC. Materials and Methods: The control GIC was prepared with self-curing GIC. The GIC containing CPP-ACP was prepared from the same batch, with 1.56% w/w CPP-ACP incorporated. Compressive strength and microtensile bond strength tests were done. Energy dispersive X-ray (EDX) analysis was used to determine the composition of various structural phases. Results: Incorporation of 1.56% w/w CPP-ACP into the GIC resulted in an increase in compressive strength and microtensile bond strength. The representative EDX spectra taken showed enhanced release of calcium, phosphate, and fluoride ions.