J. Orthod.
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Journal of Orthodontics, Vol. 33, No. 3, 198-204, September 2006 doi:10.1179/146531205225021615
© 2006 British Orthodontic Society
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Scientific Section

A clinical comparison of bracket bond failures in association with direct and indirect bonding

S. Thiyagarajah

Department of Orthodontics, School of Dentistry, Birmingham, UK

D. J. Spary

Queens Hospital, Burton upon Trent, UK

W. P. Rock

Department of Orthodontics, School of Dentistry, Birmingham, UK

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

Objective: To compare bond failure rates between direct and indirect techniques for bonding orthodontic brackets.

Design: A two-centre single blinded prospective randomized controlled clinical trial.

Materials and methods: This study was undertaken at the Birmingham Dental Hospital and Good Hope Hospital, Sutton Coldfield. Thirty-three subjects meeting the inclusion criteria were selected from orthodontic waiting lists and assigned to either of two study groups according to a split-mouth study design. The number and site of bracket failures between tooth types was recorded over 1 year. Statistical analysis was carried out using chi-square tests.

Results: Brackets were lost from 14 of the 553 teeth bonded, giving an overall bond failure rate of 2.5%. There were no significant differences in bond failures between direct and indirect bonding or in the tooth types of the failures.

Conclusions: There was no significant difference in the bond failure rates between direct and indirect bonding.

Key words: Bracket bonding, randomized clinical trial






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