title: Ex vivo shear bond strength of fibreglass reinforced aesthetic brackets.
abstract: Fibreglass reinforced brackets (FGBs) and ceramic brackets were bonded to the enamel of extracted premolars to evaluate their shear bond strength and fracture mode. One-hundred extracted premolars were divided into five groups, and combinations of two-paste and no-mix composite, and plastic bracket conditioner were used in the test groups. Bond strength testing was carried out 24 hours after direct bonding. The shear strength of ceramic brackets with a two-paste composite was significantly higher than FGBs bonded with either two-mix or no-mix composite ( P < 0.05). Ceramic brackets bonded with two-mix and no-mix composite demonstrated a 30 and a 10 percent enamel fracture rate, respectively. There were no enamel or bracket fractures in any of the FGB groups.
authors.affiliation: Orthodontic Department, Royal London Hospital, London, UK.
authors.forename: V
authors.initials: V
authors.lastname: Crow
mesh_terms: D001641:Bicuspid; D002516:Ceramics / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry; D003743:Dental Enamel / Q000293:injuries / Q000648:ultrastructure; D004868:Equipment Failure; D005898:Glass / Q000737:chemistry*; D006801:Humans; D020366:Methylmethacrylate; D008768:Methylmethacrylates / Q000737:chemistry; D016382:Orthodontic Appliance Design; D016910:Orthodontic Brackets; D019279:Resin Cements; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength; D014082:Tooth Fractures / Q000209:etiology / Q000473:pathology
chemical_list: D003188:Composite Resins; D003738:Dental Cements; D008768:Methylmethacrylates; C090340:Reliance resin cement; C097531:Rely a Bond system; D019279:Resin Cements; C009753:fiberglass; D020366:Methylmethacrylate