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Shear bond strength of orthodontic buccal tubes to porcelain

BACKGROUND: Bonding of molar tubes is becoming more popular in orthodontics. Occasionally, these bonding are done on posterior porcelain crowns or bridges. The purpose of this study was to evaluate the shear bond strength of buccal tubes on feldspathic porcelain crowns with two different methods. MA...

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Autores principales: Purmal, Kathiravan, Alam, Mohammad K., Sukumaran, Prema
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Medknow Publications & Media Pvt Ltd 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3714829/
https://www.ncbi.nlm.nih.gov/pubmed/23878568
http://dx.doi.org/10.4103/1735-3327.111805
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author Purmal, Kathiravan
Alam, Mohammad K.
Sukumaran, Prema
author_facet Purmal, Kathiravan
Alam, Mohammad K.
Sukumaran, Prema
author_sort Purmal, Kathiravan
collection PubMed
description BACKGROUND: Bonding of molar tubes is becoming more popular in orthodontics. Occasionally, these bonding are done on posterior porcelain crowns or bridges. The purpose of this study was to evaluate the shear bond strength of buccal tubes on feldspathic porcelain crowns with two different methods. MATERIALS AND METHODS: Forty porcelain right molar crowns were fabricated for this study. The crowns were randomly divided into two groups. In group 1, the crowns were etched with 9.6% hydrofluoric acid, silane coupling agent applied, coated with bonding primer and bonded with Transbond XT (3M Unitek, Monrovia, Calif). In group 2, the crowns were etched with phosphoric acid 37%, silane coupling agent applied, coated with bonding primer and bonded with Transbond XT. All the crowns were stored for 24 hours at 37°C and thermo-cycled before the shear bond test. The analysis of variance (ANOVA) was used to determine whether significant difference were present between the groups. RESULTS: The results of the analysis of variance (F = 0.23) indicated the shear bond strength of group 1 (3.57 ± 0.87 MPa) was not significantly different (P > 0.05) from group 2 (3.46 ± 0.65 Mpa). Fisher's exact test for the adhesive remnant index (ARI) revealed significant difference between both groups (P < 0.05). Eighty percent of group 1 buccal tubes failed at buccal tube/resin interface and eighty percent of group 2 mostly failed at porcelain/resin interface. CONCLUSION: Etching with phosphoric acid with the use of silane coupling agent would be safer and should make it easier for clinicians to clean the adhesive on the porcelain surface after debonding.
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spelling pubmed-37148292013-07-22 Shear bond strength of orthodontic buccal tubes to porcelain Purmal, Kathiravan Alam, Mohammad K. Sukumaran, Prema Dent Res J (Isfahan) Original Article BACKGROUND: Bonding of molar tubes is becoming more popular in orthodontics. Occasionally, these bonding are done on posterior porcelain crowns or bridges. The purpose of this study was to evaluate the shear bond strength of buccal tubes on feldspathic porcelain crowns with two different methods. MATERIALS AND METHODS: Forty porcelain right molar crowns were fabricated for this study. The crowns were randomly divided into two groups. In group 1, the crowns were etched with 9.6% hydrofluoric acid, silane coupling agent applied, coated with bonding primer and bonded with Transbond XT (3M Unitek, Monrovia, Calif). In group 2, the crowns were etched with phosphoric acid 37%, silane coupling agent applied, coated with bonding primer and bonded with Transbond XT. All the crowns were stored for 24 hours at 37°C and thermo-cycled before the shear bond test. The analysis of variance (ANOVA) was used to determine whether significant difference were present between the groups. RESULTS: The results of the analysis of variance (F = 0.23) indicated the shear bond strength of group 1 (3.57 ± 0.87 MPa) was not significantly different (P > 0.05) from group 2 (3.46 ± 0.65 Mpa). Fisher's exact test for the adhesive remnant index (ARI) revealed significant difference between both groups (P < 0.05). Eighty percent of group 1 buccal tubes failed at buccal tube/resin interface and eighty percent of group 2 mostly failed at porcelain/resin interface. CONCLUSION: Etching with phosphoric acid with the use of silane coupling agent would be safer and should make it easier for clinicians to clean the adhesive on the porcelain surface after debonding. Medknow Publications & Media Pvt Ltd 2013 /pmc/articles/PMC3714829/ /pubmed/23878568 http://dx.doi.org/10.4103/1735-3327.111805 Text en Copyright: © Dental Research Journal http://creativecommons.org/licenses/by-nc-sa/3.0 This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Article
Purmal, Kathiravan
Alam, Mohammad K.
Sukumaran, Prema
Shear bond strength of orthodontic buccal tubes to porcelain
title Shear bond strength of orthodontic buccal tubes to porcelain
title_full Shear bond strength of orthodontic buccal tubes to porcelain
title_fullStr Shear bond strength of orthodontic buccal tubes to porcelain
title_full_unstemmed Shear bond strength of orthodontic buccal tubes to porcelain
title_short Shear bond strength of orthodontic buccal tubes to porcelain
title_sort shear bond strength of orthodontic buccal tubes to porcelain
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3714829/
https://www.ncbi.nlm.nih.gov/pubmed/23878568
http://dx.doi.org/10.4103/1735-3327.111805
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