Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2015 May-Jun;12(3):265-70.

Shear bond strength of orthodontic color-change adhesives with different light-curing times

Shahin Bayani  1 , Amirreza Ghassemi  2 , Safa Manafi  3 , Mohadeseh Delavarian  1
Affiliations

Shear bond strength of orthodontic color-change adhesives with different light-curing times

Shahin Bayani et al. Dent Res J (Isfahan). 2015 May-Jun.

Abstract

Background: The purpose of this study was to evaluate the effect of light-curing time on the shear bond strength (SBS) of two orthodontic color-change adhesives (CCAs).

Materials and methods: A total of 72 extracted premolars were randomly assigned into 6 groups of 12 teeth each. Subsequent to primer application, a metal bracket was bonded to the buccal surface using an orthodontic adhesive. Two CCAs (Greengloo and Transbond Plus) were tested and one conventional light-cured adhesive (Resilience) served as control. For each adhesive, the specimens were light-cured for two different times of 20 and 40 s. All the specimens underwent mechanical testing using a universal testing machine to measure the SBS. Adhesive remnant index (ARI) was used to assess the remnant adhesive material on the tooth surface. All statistical analyses were performed using SPSS software. The significance level for all statistical tests was set at P ≤ 0.05.

Results: The SBSs of the tested groups were in the range of 14.05-31.25 MPa. Greengloo adhesive showed the highest SBS values when light-cured for 40 s, and Transbond Plus adhesive showed the lowest values when light-cured for 20 s. ARI scores of Transbond Plus adhesive were significantly higher than those of controls, while other differences in ARI values were not significant.

Conclusion: Within the limitations of his study, decreasing the light-curing time from 40 to 20 s decreased the SBS of the tested adhesives; however, this decline in SBS was statistically significant only in Transbond Plus adhesive.

Keywords: Adhesive system; bond strength; dental adhesive; light curing; orthodontic bonding; shear bond strength.

PubMed Disclaimer

Conflict of interest statement

Conflict of Interest: The authors of this manuscript declare that they have no conflicts of interest, real or perceived, financial or non-financial in this article.

Figures

Figure 1
Figure 1
Measurement of shear bond strength of a specimen in a universal testing machine.
See this image and copyright information in PMC

Similar articles

See all similar articles

Cited by

See all "Cited by" articles

References

    1. Sunna S, Rock WP. An ex vivo investigation into the bond strength of orthodontic brackets and adhesive systems. Br J Orthod. 1999;26:47–50. - PubMed
    1. Heravi F, Bayani S. Changes in shear bond strength of ceramic and stainless steel brackets with different visible light curing times and directions. Aust Orthod J. 2009;25:153–7. - PubMed
    1. Mavropoulos A, Staudt CB, Kiliaridis S, Krejci I. Light curing time reduction: In vitro evaluation of new intensive light-emitting diode curing units. Eur J Orthod. 2005;27:408–12. - PubMed
    1. Duers MW, English JD, Ontiveros JC, Powers JM, Bussa HI, Frey GN, et al. Bond strength comparison of color change adhesives for orthodontic bonding. Tex Dent J. 2011;128:267–75. - PubMed
    1. Ekhlassi S, English JD, Ontiveros JC, Powers JM, Bussa HI, Frey GN, et al. Bond strength comparison of color-change adhesives for orthodontic bonding using a self-etching primer. Clin Cosmet Investig Dent. 2011;3:39–44. - PMC - PubMed