Comparison of bond strength in fixed multistrand retainers using universal and conventional adhesives: An in vitro study.
- 1Department of Orthodontics, Dental Research Center, School of Dentistry, Dental Research Institute, Isfahan University of Medical Sciences, Tehran, Iran.
- 2Department of Prosthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
- 3Department of Operative Dentistry, Dental Materials Research Center, Dental Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran.
Abstract
Background
To prevent relapses, fixed retainers are used. However, bond failure is a common issue. This study compares shear bond strength and failure mode using conventional and universal adhesives (UAs), containing 10-MDP, with different application methods.Materials and methods
In this in vitro study, 120 intact maxillary premolars were divided into four groups and treated with a UA or a conventional adhesive (CA) with or without a primer application on wire. The teeth were assessed using a 0.0195" three-strand multistrand wire and a high-filler flowable composite. Bond strength was measured after thermocycling, and the adhesive remnant index (ARI) was determined for all samples. An independent t-test was used to compare the means of quantitative variables, and a Chi-square test was used to compare the distribution of qualitative data (P < 0.05).Results
The mean bond strength for the group where the primer was applied to the wire surface with UA was 33.28 Newton (N), and with CA, it was 37.17 N. The mean bond strength of the samples without primer application on the wire surface with UA and CA was 40.88 N and 38.42 N, respectively, despite no statistically significant differences between the groups (P > 0.05). There was no significant difference in ARI between the groups with and without primer application on the wire surface.Conclusion
The application or nonapplication of primer on the wire surface and the type of adhesive had no significant effect on the bond strength and ARI of the samples.
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BibTeX
@article{zarei2026comparison,
title = {{Comparison of bond strength in fixed multistrand retainers using universal and conventional adhesives: An in vitro study.}},
author = {Zahra Zarei and Mahdi Zahedi and Atiyeh Feiz},
journal = {Dental research journal},
year = {2026},
month = oct,
doi = {10.4103/drj.drj_498_24},
url = {https://europepmc.org/article/MED/42974578},
note = {CC BY-NC-SA},
}
RIS
TY - JOUR
TI - Comparison of bond strength in fixed multistrand retainers using universal and conventional adhesives: An in vitro study.
AU - Zahra Zarei
AU - Mahdi Zahedi
AU - Atiyeh Feiz
PY - 2026
DA - 2026/10/08
JO - Dental research journal
DO - 10.4103/drj.drj_498_24
UR - https://europepmc.org/article/MED/42974578
AB - Background To prevent relapses, fixed retainers are used. However, bond failure is a common issue. This study compares shear bond strength and failure mode using conventional and universal adhesives (UAs), containing 10-MDP, with different application methods.Materials and methods In this in vitro study, 120 intact maxillary premolars were divided into four groups and treated with a UA or a conventional adhesive (CA) with or without a primer application on wire. The teeth were assessed using a 0.0195" three-strand multistrand wire and a high-filler flowable composite. Bond strength was measured after thermocycling, and the adhesive remnant index (ARI) was determined for all samples. An independent t-test was used to compare the means of quantitative variables, and a Chi-square test was used to compare the distribution of qualitative data (P < 0.05).Results The mean bond strength for the group where the primer was applied to the wire surface with UA was 33.28 Newton (N), and with CA, it was 37.17 N. The mean bond strength of the samples without primer application on the wire surface with UA and CA was 40.88 N and 38.42 N, respectively, despite no statistically significant differences between the groups (P > 0.05). There was no significant difference in ARI between the groups with and without primer application on the wire surface.Conclusion The application or nonapplication of primer on the wire surface and the type of adhesive had no significant effect on the bond strength and ARI of the samples.
SN - 1735-3327
SN - 2008-0255
ER -