title: Bond strength of Bis-GMA and glass ionomer pit and fissure sealants using cyclic fatigue.
abstract: The aim of the study was to determine the bond strength of glass ionomer and resin-modified glass ionomer sealants compared to Bis-GMA sealants using both static and cyclic fatigue shear testing. Four materials were evaluated: D, a Bis-GMA sealant with 10% phosphoric acid etchant; FC, a resin-modified glass ionomer sealant with 20% polyacrylic acid etchant; FD, a resin-modified glass ionomer sealant with 10% polyacrylic acid etchant; and FSC, a self-cured glass ionomer sealant with no etchant. Gelatin capsules filled with the sealant material were bonded to the enamel surfaces of bovine teeth after appropriate surface conditioning and then tested in shear static and cyclic fatigue. Static and cyclic shear bond strengths, respectively, for each group were (MPa): FC: 21.1+/-2.8 and 17.1+/-3.1; FD: 14.6+/-5.9 and 8.5+/-3.1; D: 10.8+/-4.9 and 4.7+/-2.6; FSC: 8.7 (1.0 and 2.9+/-0.6. The resin-modified glass ionomer sealants had better fatigue bond strength than both Bis-GMA and self-cured glass ionomer sealants with the surface conditioning affecting the bond strength of the resin-modified glass ionomer sealants.
authors.affiliation: Department of Paediatric Dentistry, University of Illinois at Chicago, USA.
authors.forename: H R
authors.initials: HR
authors.lastname: Dewji
authors.forename: J L
authors.initials: JL
authors.lastname: Drummond
authors.forename: S
authors.initials: S
authors.lastname: Fadavi
authors.forename: I
authors.initials: I
authors.lastname: Punwani
mesh_terms: D000134:Acid Etching, Dental; D000180:Acrylic Resins / Q000737:chemistry; D000704:Analysis of Variance; D000818:Animals; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry*; D002214:Capsules; D002417:Cattle; D001840:Dental Bonding; D003743:Dental Enamel / Q000648:ultrastructure; D003799:Dental Stress Analysis; D005069:Evaluation Studies as Topic; D005780:Gelatin; D005899:Glass Ionomer Cements / Q000737:chemistry*; D008422:Materials Testing; D010756:Phosphoric Acids / Q000008:administration & dosage; D010895:Pit and Fissure Sealants / Q000737:chemistry*; D019279:Resin Cements / Q000737:chemistry; D013314:Stress, Mechanical
chemical_list: D000180:Acrylic Resins; D002214:Capsules; D005899:Glass Ionomer Cements; D010756:Phosphoric Acids; D010895:Pit and Fissure Sealants; D019279:Resin Cements; C090915:GC Fuji III; D017438:Bisphenol A-Glycidyl Methacrylate; C006903:carbopol 940; D005780:Gelatin