title: The influence of no-primer adhesives and anchor pylons bracket bases on shear bond strength of orthodontic brackets.
abstract: OBJECTIVE
  The aim of this study was to compare the shear bond strength (SBS) and adhesive remnant index (ARI) scores of no-primer adhesives tested with two different bracket bases.
  
  
  METHODS
  120 bovine permanent mandibular incisors were divided into 6 groups of 20 specimens. Two brackets (ODP) with different bracket bases (anchor pylons and 80-gauge mesh) were bonded to the teeth using a conventional adhesive (Transbond XT) and two different no-primer adhesive (Ortho Cem; Heliosit) systems. Groups were tested using an instron universal testing machine. SBS values were recorded. ARI scores were measured. SEM microphotographs were taken to evaluate the pattern of bracket bases. Statistical analysis was performed. ANOVA and Tukey tests were carried out for SBS values, whereas a chi-squared test was applied for ARI scores.
  
  
  RESULTS
  Highest bond strength values were reported with Transbond XT (with both pad designs), Ortho Cem bonded on anchor pylons and Heliosit on 80-gauge mesh. A higher frequency of ARI score of "3" was reported for Transbond XT groups. Other groups showed a higher frequency of ARI score "2" and "1."
  
  
  CONCLUSIONS
  Transbond XT showed the highest shear bond strength values with both pad designs.
authors.affiliation: Dipartimento di Scienze Clinico Chirurgiche, Diagnostiche e Pediatriche, Unità di Odontoiatria, Reparto di Ortognatodonzia, Università degli Studi di Pavia, Piazzale Golgi, 2-27100 Pavia, Italy. andrea.scribante@unipv.it
authors.forename: Andrea
authors.initials: A
authors.lastname: Scribante
authors.forename: Maria Francesca
authors.initials: MF
authors.lastname: Sfondrini
authors.forename: Danilo
authors.initials: D
authors.lastname: Fraticelli
authors.forename: Paola
authors.initials: P
authors.lastname: Daina
authors.forename: Alessandra
authors.initials: A
authors.lastname: Tamagnone
authors.forename: Paola
authors.initials: P
authors.lastname: Gandini
mesh_terms: D000818:Animals; D001672:Biocompatible Materials / Q000494:pharmacology*; D002417:Cattle; D003738:Dental Cements / Q000494:pharmacology*; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D016910:Orthodontic Brackets; D033081:Shear Strength / Q000187:drug effects*
chemical_list: D001672:Biocompatible Materials; D003738:Dental Cements