title: Water and saliva contamination effect on shear bond strength of brackets bonded with a moisture-tolerant light cure system.
abstract: OBJECTIVE
  To evaluate the effects of water and saliva contamination on shear bond strength of brackets bonded with a moisture-tolerant light cure system.
  
  
  METHODS
  Brackets were bonded to 240 bovine lower incisors divided into 12 groups. Four bonding procedures were evaluated, including (1) TSEP/Transbond XT, (2) TMIP/ Transbond XT, (3) TSEP/Transbond PLUS, and (4) TMIP/Transbond PLUS, each under three different bonding conditions: without contamination, with water contamination, and with saliva contamination. Shear bond strength was measured with a universal testing machine. The adhesive remnant on the teeth was quantified with the use of image analyzing equipment.
  
  
  RESULTS
  Without contamination, bond strengths for the four procedures were similar (P > .05). TSEP/Tranbond PLUS and TMIP/Transbond PLUS left significantly less adhesive on the teeth after debonding than TSEP/Transbond XT and TMIP/Transbond XT (P < .008). Bond strength and adhesive remaining for TMIP/Transbond XT contaminated with water or saliva showed significantly worse performance than the other procedures evaluated (P < .008). Contamination (with water or saliva) did not affect either bond strength or adhesive remaining on the teeth for TSEP/ Transbond XT, TSEP/Transbond PLUS, or TMIP/Transbond PLUS (P > .017), although for TMIP/ Transbond XT, both variables showed significant reductions after contamination (P < .017).
  
  
  CONCLUSIONS
  TSEP/Transbond PLUS, TMIP/Transbond PLUS, and TSEP/Transbond XT showed greater tolerance to wet conditions than was shown by TMIP/Transbond XT.
authors.affiliation: University of Murcia, Murcia, Spain. ascenvi@um.es
authors.forename: Ascensión
authors.initials: A
authors.lastname: Vicente
authors.forename: Ana
authors.initials: A
authors.lastname: Mena
authors.forename: Antonio José
authors.initials: AJ
authors.lastname: Ortiz
authors.forename: Luis Alberto
authors.initials: LA
authors.lastname: Bravo
mesh_terms: D000818:Animals; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002417:Cattle; D017005:Dental Debonding; D003745:Dental Enamel Permeability; D003799:Dental Stress Analysis; D000431:Ethanol; D055115:Light-Curing of Dental Adhesives; D008689:Methacrylates; D016910:Orthodontic Brackets; D011897:Random Allocation; D019279:Resin Cements / Q000737:chemistry; D012463:Saliva; D033081:Shear Strength; D014867:Water; D017155:Wettability
chemical_list: D008689:Methacrylates; D019279:Resin Cements; C429625:Transbond Plus Self-Etching Primer; C458821:Transbond moisture-insensitive primer; D014867:Water; C065742:Transbond; D000431:Ethanol; D017438:Bisphenol A-Glycidyl Methacrylate