Physicomechanical properties of a zinc-reinforced glass ionomer restorative material

Abstract

We compared a zinc-reinforced glass ionomer restorative material (ChemFil Rock) with three commercially available glass ionomer cements (GICs), namely, Fuji IX GP Extra, Ketac Molar Quick Aplicap, and EQUIA Fil, with respect to fracture toughness, microhardness, roughness, and abrasive wear. Fracture toughness (K IC ) was tested according to ISO 13586 (n = 10). Hardness, roughness, and abrasive wear were also tested (n = 9). Data were analyzed using the Wilcoxon rank-sum test with adjustment for multiple comparisons (α = 0.05). As compared with the other GICs ChemFil Rock exhibited a greater increase in surface roughness (P < 0.05) and lower microhardness (P < 0.01). The wear resistance of ChemFil Rock was comparable to that of the other GICs (P > 0.05). ChemFil Rock had significantly lower fracture toughness as compared with EQUIA Fil (P = 0.01) and significantly higher fracture toughness as compared with the other GICs (P < 0.02). In conclusion, as compared with the three other commercially available GICs, ChemFil Rock had intermediate fracture toughness, the lowest microhardness, and the greatest change in surface roughness. (J Oral Sci 56, 11-16, 2014)

Fracture strength of restorations in proximal cavities of primary molars

“…In the present in vitro study, GIC restoration in both box-only and dovetail cavities had similar FS with RMGIC. In a novel study, Al-Angari et al (2014) reported that Equia Fil had the highest fracture toughness among the tested GICs. They guessed that the high fracture toughness of Equia Fil might be due to the resin coat applied to the surface.…”

“…In a novel study, Al‐Angari et al . () reported that Equia Fil had the highest fracture toughness among the tested GICs. They guessed that the high fracture toughness of Equia Fil might be due to the resin coat applied to the surface.…”

“…Thus, micromechanical strength of materials were weakened. It was reported that GICs exhibit more wear than composites due to their composition (Al-Angari et al, 2014). Their acid-base reaction results in a matrix comprising an ionically cross-linked polyalkenoate network, which is weaker than the matrix of resins strengthened by fillers and methacrylate polymer chains (Davidson, 2006).…”

Tissue Response after Subcutaneous Implantation of Different Glass Ionomer-Based Cements

“…In a retrospective cohort study (11) EQUIA® Fil inserted in class I and II cavities was considered as clinically acceptable, after 2 years. In addition, EQUIA® Fil presented high fracture resistance in vitro and could be used in areas with high stress level (12) and presented good adaptation in class II restorations of primary teeth, with less steps for application and shorter operative time (13).…”

In Vitro Evaluation of the Impact of Erosive/Abrasive Challenge in Glass Ionomer Cements

“…The conventional GICs tend to be less resistance to the chemical and mechanical challenges imposed by the oral environment [8,9]. However, the development of the resin modified GIC (RMGIC), the high viscosity GIC and the encapsulated GIC tried to overcome this problem, since they exhibit better physical and mechanical properties that may enhance GIC use in Dentistry [10,11]. The clinical longevity of the dental materials over the time is determined by their capacity to resist to acid and mechanic challenges in a daily basis.…”