title: Influence of flowable resins on the shear bond strength of orthodontic brackets.
abstract: The present study tested the shear bond strength (SBS) of orthodontic brackets bonded to teeth using flowable resins. A total of 105 human teeth were divided into seven groups. The brackets in each group were bonded to the tooth substrates using a Transbond XT adhesive and six other different flowable resins, respectively. Each adhesive resin was light-cured using a quartz-tungsten-halogen (QTH) light for 40 seconds. The brackets were debonded in shear mode using a universal testing machine. The brackets bonded using Tetric Flow and Grandio Flow showed slightly greater SBS values (13.0+/-1.8 and 12.2+/-1.2 MPa, respectively) than the Transbond XT adhesive (12.1+/-1.2 MPa). However, the SBS values of Transbond XT, X-flow, Tetric Flow, Grandio Flow, and Filtek Z350 flow were not significantly different. As for Admira Flow and Aelite Flow, they scored significantly lower SBS values (7.0+/-2.1 and 9.2+/-1.3 MPa, respectively) than the other groups. On bracket failure mode, statistical analysis revealed a similar failure mode among all the seven test groups.
authors.affiliation: Department of Orthodontics, College of Dentistry, Pusan National University, Beomeo-ri Mulgeum-eup Yangsan 626-870, Korea.
authors.forename: Soo-Byung
authors.initials: SB
authors.lastname: Park
authors.forename: Woo-Sung
authors.initials: WS
authors.lastname: Son
authors.forename: Ching-Chang
authors.initials: CC
authors.lastname: Ko
authors.forename: Franklin
authors.initials: F
authors.lastname: García-Godoy
authors.forename: Mi-Gyoung
authors.initials: MG
authors.lastname: Park
authors.forename: Hyung-Il
authors.initials: HI
authors.lastname: Kim
authors.forename: Yong Hoon
authors.initials: YH
authors.lastname: Kwon
mesh_terms: D000134:Acid Etching, Dental; D000268:Adhesiveness; D017609:Barium Compounds / Q000737:chemistry; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D055117:Curing Lights, Dental / Q000145:classification; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry; D003743:Dental Enamel / Q000033:anatomy & histology; D003799:Dental Stress Analysis / Q000295:instrumentation; D006801:Humans; D008422:Materials Testing; D016910:Orthodontic Brackets; D019279:Resin Cements / Q000737:chemistry*; D033081:Shear Strength; D012822:Silicon Dioxide / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry
chemical_list: C121035:Aeliteflo; D017609:Barium Compounds; D003188:Composite Resins; D003738:Dental Cements; C509998:Grandio; D019279:Resin Cements; C477790:Transbond XT; C525452:admira flow; C533204:filtek Z350; C111840:flowable hybrid composite; C452226:tetric flow composite resin; D014867:Water; D017438:Bisphenol A-Glycidyl Methacrylate; D012822:Silicon Dioxide