J. Orthod.
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Journal of Orthodontics, Vol. 34, No. 2, 128-136, June 2007 doi:10.1179/146531207225022032
© 2007 British Orthodontic Society
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Scientific Section

Bonded versus banded first molar attachments: a randomized controlled clinical trial

Philip Banks

Burnley General Hospital Burnley, Lancashire, UK

Tatiana V. Macfarlane

Department of General Practice and Primary Care, The University of Aberdeen, UK

Address for correspondence: Mr Philip Banks, Orthodontics Department, Burnley General Hospital, Casterton Avenue, Burnley, Lancashire BB10 2PQ, UK. Email: philbanks_burnly{at}yahoo.com


  Abstract

Objective: To compare the clinical failure rates of bonded first molar tubes with those of cemented bands during fixed appliance therapy.

Design: Prospective randomized controlled clinical trial.

Setting: Two UK hospital orthodontic clinics, February 2001–December 2004.

Participants: Hospital waiting list patients needing fixed appliances (n = 110).

Method: Patients were randomly allocated to two groups. Experimental group patients (n = 55) received single first molar tubes (n = 181) bonded with a no-mix chemically cured composite (Rely-A-Bond) after a 30-second etch. Control group patients (n = 55) were treated with bands (n = 186) cemented with Intact glass ionomer cement (GIC). First-time failures were recorded together with the time of failure. All patients were followed to the end or discontinuation of treatment.

Results: First-time failures: bands = 18.8%; bonds = 33.7 %. Bonded tubes were more likely to fail [RR 2.4; 95% CI (1.4, 4.1)] compared with bands. Experimental group patients also had more bracket failures (P = 0.009), when analysed at patient level.

Conclusion: First molar tubes bonded with Rely-A-Bond composite showed a significantly higher first-time failure rate than bands cemented with Intact GIC.

Key words: Molar bonds, molar bonded tubes, Rely-A-Bond, Intact, randomized controlled clinical trial, molar attachment failure rates






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