Bond strength and micro-computed tomographic evaluation of pre-coated brackets
Data publikacji: 15 sie 2021
Zakres stron: 201 - 207
Otrzymano: 01 lut 2015
Przyjęty: 01 wrz 2015
DOI: https://doi.org/10.21307/aoj-2020-156
© 2015 Waleed Bakhadher et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.
Objectives
The aim of the present study was to assess and compare the shear bond strength (SBS) of metal pre-coated orthodontic brackets bonded to fluorotic and non-fluorotic teeth treated with three different etching techniques. A second aim was to determine the volume of adhesive remaining on the tooth at debond using micro-computed tomography (μCT).
Methods
Ninety extracted premolars were selected to include 45 fluorotic (test group) and 45 non-fluorotic (control group) teeth. Each group was divided into three subgroups of 15 each, which were treated as follows: 1) micro-etched; 2) acid-etched; and 3) both micro-etched and acid-etched. A bonding agent was applied to the prepared surfaces; pre-coated and light-cured brackets were attached to all teeth. An Instron universal testing machine was used to record the debonding force. Specimens were then scanned using a microCT to evaluate the amount of adhesive remaining on the teeth. The significance of the statistical tests was pre-determined at
Results
Two-way ANOVA showed that fluorosis of teeth had no influence on the SBS (
Conclusions
Fluorosis had no influence on the SBS of brackets, whereas it had a negative influence on retaining adhesives onto the tooth surfaces.