title: A randomized clinical trial comparing the accuracy of direct versus indirect bracket placement.
abstract: OBJECTIVE
  To determine the accuracy of direct or indirect bracket placement.
  
  
  METHODS
  A prospective, randomized comparison of 2 different methods of bracket placement.
  
  
  METHODS
  Queens Hospital, Burton upon Trent, UK between February and May 2001.
  
  
  METHODS
  Twenty-six consecutive patients requiring upper and lower MBT trade mark pre-adjusted Edgewise appliances had their labial segments bonded directly or indirectly according to a split mouth system of allocation. Before and after bond-up all brackets were photographed and measured from tracings to determine positional differences from the ideal.
  
  
  RESULTS
  Using ANOVA (General Linear Model), vertical errors were found to be greater than those in the horizontal plane, which in turn were greater than angular errors (p<0.05). Errors were greater in the maxillary arch than in the mandibular arch. There was no significant difference between the mean errors produced by the two methods of bracket placement.
  
  
  CONCLUSIONS
  Mean bracket placement errors were similar with both techniques.
authors.affiliation: University of Birmingham Dental School, St Chad's Queensway, Birmingham, UK.
authors.forename: T M
authors.initials: TM
authors.lastname: Hodge
authors.forename: A A
authors.initials: AA
authors.lastname: Dhopatkar
authors.forename: W P
authors.initials: WP
authors.lastname: Rock
authors.forename: D J
authors.initials: DJ
authors.lastname: Spary
mesh_terms: D001840:Dental Bonding / Q000379:methods*; D006801:Humans; D016014:Linear Models; D003765:Models, Dental; D015999:Multivariate Analysis; D016910:Orthodontic Brackets; D023861:Photography, Dental; D011446:Prospective Studies; D015203:Reproducibility of Results; D018709:Statistics, Nonparametric