J. Orthod.
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Journal of Orthodontics, Vol. 35, No. 1, 43-48, March 2008 doi:10.1179/146531207225022410
© 2008 British Orthodontic Society
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Scientific Section

Effect of sandblasting on the retention of orthodontic brackets: a controlled clinical trial

S. Sunna

Private practice and Department of Paediatric Dentistry, Orthodontics and Preventive Dentistry, Faculty of Dentistry, University of Jordan, Jordan

W. P. Rock

Department of Orthodontics, School of Dentistry, University of Birmingham, UK

Address for correspondence: Dr W. P. Rock, Department of Orthodontics, School of Dentistry, University of Birmingham, St Chad’s Queensway, Birmingham B4 6NN, UK. Email: w.p.rock{at}bham.ac.uk


  Abstract

Objective: To study the effect of chairside sandblasting of the bases upon the retention of mesh backed orthodontic brackets.

Design: 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.

Conclusion: Sandblasting did not significantly improve the retention of mesh based orthodontic brackets in this study.

Key words: Bracket bonding, Sandblasting






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