title: Effect of sandblasting on the retention of orthodontic brackets: a controlled clinical trial.
abstract: OBJECTIVE
  To study the effect of chairside sandblasting of the bases upon the retention of mesh backed orthodontic brackets.
  
  
  METHODS
  Prospective controlled clinical trial.
  
  
  METHODS
  Brackets were bonded to 60 successive patients who were treated at an orthodontic practice in Amman, Jordan. Using a crossover system of allocation, quadrants were bonded using either sandblasted or non-sandblasted brackets respectively. Rely-A-Bond adhesive was used throughout. Bond failures were monitored over one year.
  
  
  RESULTS
  1112 brackets were assessed. The overall failure rate was 4.0% and the failure rates for non-sandblasted and sandblasted brackets were 4.7 and 3.4% respectively. The odds ratio for at least one bracket failure within the control quadrant compared with the experimental quadrant was 0.50 (95% CI 0.185 to 1.238), which was not statistically significant.
  
  
  CONCLUSIONS
  Sandblasting did not significantly improve the retention of mesh based orthodontic brackets in this study.
authors.affiliation: Department of Paediatric Dentistry, Orthodontics and Preventive Dentistry, Faculty of Dentistry, University of Jordan.
authors.forename: S
authors.initials: S
authors.lastname: Sunna
authors.forename: W P
authors.initials: WP
authors.lastname: Rock
mesh_terms: D000293:Adolescent; D000537:Aluminum Oxide / Q000737:chemistry; D001641:Bicuspid; D002648:Child; D018592:Cross-Over Studies; D003481:Cuspid; D003722:Dental Alloys / Q000737:chemistry; D001840:Dental Bonding; D045662:Dental Etching / Q000379:methods*; D004868:Equipment Failure; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007180:Incisor; D008297:Male; D008310:Malocclusion / Q000628:therapy; D016382:Orthodontic Appliance Design; D016910:Orthodontic Brackets; D011446:Prospective Studies; D019279:Resin Cements / Q000737:chemistry; D013499:Surface Properties
chemical_list: D003722:Dental Alloys; C097531:Rely a Bond system; D019279:Resin Cements; D000537:Aluminum Oxide