title: 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 (KIC) 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.
authors.affiliation: Division of Dental Biomaterials, Department of Restorative Dentistry, Indiana University School of Dentistry.
authors.forename: Sarah S
authors.initials: SS
authors.lastname: Al-Angari
authors.forename: Anderson T
authors.initials: AT
authors.lastname: Hara
authors.forename: Tien-Min
authors.initials: TM
authors.lastname: Chu
authors.forename: Jeffrey
authors.initials: J
authors.lastname: Platt
authors.forename: George
authors.initials: G
authors.lastname: Eckert
authors.forename: N Blaine
authors.initials: NB
authors.lastname: Cook
mesh_terms: D003793:Dental Restoration, Permanent; D005899:Glass Ionomer Cements; D013499:Surface Properties; D015032:Zinc / Q000737:chemistry*
chemical_list: D005899:Glass Ionomer Cements; D015032:Zinc