Effect of Different Surface Treatments on Microtensile Bond Strength of Composite Resin to Normal and Fluorotic Enamel after Microabrasion
Objectives: This study aimed to determine the effect of surface treatments such as tooth reduction and extending the etching time on microtensile bond strength (µTBS) of composite resin to normal and fluorotic enamel after microabrasion. Materials and Methods: Fifty non-carious anterior teeth wer...
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Tehran University of Medical Sciences
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doaj-cd74c225b6fd4a6bb0bb56cecbdbdbd92020-11-25T03:47:02ZengTehran University of Medical SciencesFrontiers in Dentistry2676-296X2017-01-01136892Effect of Different Surface Treatments on Microtensile Bond Strength of Composite Resin to Normal and Fluorotic Enamel after MicroabrasionMahshid Mohammadi Basir0Mohammad Bagher Rezvani1Elham Tabatabai Ghomsheh2Zahra Malek Hosseini3Assistant Professor, Department of Restorative Dentistry, Faculty of Dentistry, Shahed University, Tehran, IranAssistant Professor, Department of Restorative Dentistry, Faculty of Dentistry, Shahed University, Tehran, IranAssistant Professor, Department of Restorative Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, IranAssistant Professor, Department of Restorative Dentistry, Faculty of Dentistry, Kermanshah University of Medical Sciences, Kermanshah, Iran Objectives: This study aimed to determine the effect of surface treatments such as tooth reduction and extending the etching time on microtensile bond strength (µTBS) of composite resin to normal and fluorotic enamel after microabrasion. Materials and Methods: Fifty non-carious anterior teeth were classified into two groups of normal and fluorotic (n=25) using Thylstrup and Fejerskov index (TFI=4-6). Teeth in each group were treated with five modalities as follows and restored with OptiBond FL and Z350 composite resin: 1-Etching (30 seconds), bonding, filling (B); 2-Tooth reduction (0.3mm), etching, bonding, filling (R-B); 3-Microabrasion (120 seconds), etching, bonding, filling (M-B); 4- Microabrasion, tooth reduction, etching, bonding, filling (M-R-B); and 5- Microabrasion, etching (60 seconds), bonding, filling (M-2E-B). Ten experimental groups (n=5) were designed; 150 rectangular samples (10 in each group) with a cross-sectional area of 1×1mm2 were prepared for µTBS test. Failure mode was determined under a stereomicroscope and one specimen was selected from each group for scanning electron microscopy (SEM) analysis. Data were analyzed using two-way ANOVA and Tukey’s test. Results: The µTBS to normal enamel was higher than to fluorotic enamel in all groups except for group (R-B). The Maximum and minimum µTBS were noted in the group (normal, reduction, bonding) and (fluorosed, microabrasion, bonding), respectively. Tooth reduction increased µTBS more effectively than extended etching time after microabrasion. Conclusions: Fluorosis may reduce µTBS of composite resin to enamel. Microabrasion reduced the bond strength. Tooth reduction and extended etching time increased µTBS of composite resin to both normal and fluorotic enamel. https://jdt.tums.ac.ir/index.php/jdt/article/view/1316FluorosisDentalEnamel MicroabrasionDental BondingComposite Resins |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mahshid Mohammadi Basir Mohammad Bagher Rezvani Elham Tabatabai Ghomsheh Zahra Malek Hosseini |
spellingShingle |
Mahshid Mohammadi Basir Mohammad Bagher Rezvani Elham Tabatabai Ghomsheh Zahra Malek Hosseini Effect of Different Surface Treatments on Microtensile Bond Strength of Composite Resin to Normal and Fluorotic Enamel after Microabrasion Frontiers in Dentistry Fluorosis Dental Enamel Microabrasion Dental Bonding Composite Resins |
author_facet |
Mahshid Mohammadi Basir Mohammad Bagher Rezvani Elham Tabatabai Ghomsheh Zahra Malek Hosseini |
author_sort |
Mahshid Mohammadi Basir |
title |
Effect of Different Surface Treatments on Microtensile Bond Strength of Composite Resin to Normal and Fluorotic Enamel after Microabrasion |
title_short |
Effect of Different Surface Treatments on Microtensile Bond Strength of Composite Resin to Normal and Fluorotic Enamel after Microabrasion |
title_full |
Effect of Different Surface Treatments on Microtensile Bond Strength of Composite Resin to Normal and Fluorotic Enamel after Microabrasion |
title_fullStr |
Effect of Different Surface Treatments on Microtensile Bond Strength of Composite Resin to Normal and Fluorotic Enamel after Microabrasion |
title_full_unstemmed |
Effect of Different Surface Treatments on Microtensile Bond Strength of Composite Resin to Normal and Fluorotic Enamel after Microabrasion |
title_sort |
effect of different surface treatments on microtensile bond strength of composite resin to normal and fluorotic enamel after microabrasion |
publisher |
Tehran University of Medical Sciences |
series |
Frontiers in Dentistry |
issn |
2676-296X |
publishDate |
2017-01-01 |
description |
Objectives: This study aimed to determine the effect of surface treatments such as tooth reduction and extending the etching time on microtensile bond strength (µTBS) of composite resin to normal and fluorotic enamel after microabrasion.
Materials and Methods: Fifty non-carious anterior teeth were classified into two groups of normal and fluorotic (n=25) using Thylstrup and Fejerskov index (TFI=4-6). Teeth in each group were treated with five modalities as follows and restored with OptiBond FL and Z350 composite resin: 1-Etching (30 seconds), bonding, filling (B); 2-Tooth reduction (0.3mm), etching, bonding, filling (R-B); 3-Microabrasion (120 seconds), etching, bonding, filling (M-B); 4- Microabrasion, tooth reduction, etching, bonding, filling (M-R-B); and 5- Microabrasion, etching (60 seconds), bonding, filling (M-2E-B). Ten experimental groups (n=5) were designed; 150 rectangular samples (10 in each group) with a cross-sectional area of 1×1mm2 were prepared for µTBS test. Failure mode was determined under a stereomicroscope and one specimen was selected from each group for scanning electron microscopy (SEM) analysis. Data were analyzed using two-way ANOVA and Tukey’s test.
Results: The µTBS to normal enamel was higher than to fluorotic enamel in all groups except for group (R-B). The Maximum and minimum µTBS were noted in the group (normal, reduction, bonding) and (fluorosed, microabrasion, bonding), respectively. Tooth reduction increased µTBS more effectively than extended etching time after microabrasion.
Conclusions: Fluorosis may reduce µTBS of composite resin to enamel. Microabrasion reduced the bond strength. Tooth reduction and extended etching time increased µTBS of composite resin to both normal and fluorotic enamel.
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topic |
Fluorosis Dental Enamel Microabrasion Dental Bonding Composite Resins |
url |
https://jdt.tums.ac.ir/index.php/jdt/article/view/1316 |
work_keys_str_mv |
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