<abstract xmlns="http://www.w3.org/1999/xhtml"><sec><h3>Objectives</h3><p>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).</p></sec><sec><h3>Methods</h3><p>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 <italic>p</italic> &lt; 0.05.</p></sec><sec><h3>Results</h3><p>Two-way ANOVA showed that fluorosis of teeth had no influence on the SBS (<italic>p</italic> = 0.165) whereas the volume of adhesive remnants was significantly higher in the control group compared with the test group (<italic>p</italic> &lt; 0.001).</p></sec><sec><h3>Conclusions</h3><p>Fluorosis had no influence on the SBS of brackets, whereas it had a negative influence on retaining adhesives onto the tooth surfaces.</p></sec></abstract>

ObjectivesThe 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).MethodsNinety 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 p < 0.05.ResultsTwo-way ANOVA showed that fluorosis of teeth had no influence on the SBS (p = 0.165) whereas the volume of adhesive remnants was significantly higher in the control group compared with the test group (p < 0.001).ConclusionsFluorosis had no influence on the SBS of brackets, whereas it had a negative influence on retaining adhesives onto the tooth surfaces.

Bond strength and micro-computed tomographic evaluation of pre-coated brackets

Australasian Orthodontic Journal

This work is licensed under the Creative Commons Attribution 4.0 International License.

{"article-title":"Bond strength and micro-computed tomographic evaluation of pre-coated brackets"}

ObjectivesThe 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...

Bond strength and micro-computed tomographic evaluation of pre-coated brackets

Pubblicato online: 15 ago 2021

Pagine: 201 - 207

Ricevuto: 01 feb 2015

Accettato: 01 set 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.