A 15-month evaluation of bond failures of orthodontic brackets bonded with direct versus indirect bonding technique: a clinical trial
Abstract
Background
The
purpose of this clinical longitudinal study was to investigate the
effectiveness of indirect bonding technique evaluating the number of
bond failures which occurred during treatment.
Methods
Fifty-two
patients were selected and divided into two groups: group A (33
patients) bonded with the direct technique and group B (19 patients)
bonded with the indirect technique. The number and date of bracket
failure were recorded for over 15 months. Moreover, also the effect of
crowding level on bracket failures was calculated. Statistical analysis
was performed by means of t-test, Kaplan-Meier survival estimates and chi-squared test.
Results
No
statistically significant differences were found in the total bond
failure rate between direct and indirect techniques, also when comparing
the upper and lower arches. The only significant difference was found
comparing the posterior segment of the lower arches, in which a higher
percentage of detachments were recorded in group B, bonded with the
indirect technique. Moreover, no significant differences between direct
and indirect bonding were found when evaluating crowding level.
Conclusions
Orthodontic
practitioners can safely use the indirect bonding technique, even in
patients with severe crowding, because it does not influence the
adhesive quality and the bracket survival rate.
Comments