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
. 2016 Oct;24(5):317-321.
doi: 10.5455/aim.2016.24.317-321. Epub 2016 Nov 1.

Effect of Dental Chair Light on Enamel Bonding of Orthodontic Brackets Using Light Cure Based Adhesive System: An In-Vitro Study

Anil Tiwari  1 , Tarulatha Shyagali  1 , Sarvraj Kohli  1 , Rishi Joshi  1 , Abhishek Gupta  1 , Rana Tiwari  1
Affiliations

Effect of Dental Chair Light on Enamel Bonding of Orthodontic Brackets Using Light Cure Based Adhesive System: An In-Vitro Study

Anil Tiwari et al. Acta Inform Med. 2016 Oct.

Abstract

Aim: The aim of this in vitro study was to evaluate the influence of the Dental chair light on the bond strength of light cured composite resin.

Materials and methods: Sixty therapeutically extracted human premolar teeth were randomly allocated to two groups of 30 specimens each. In both groups light cured composite resin (Transbond XT) and MBT premolar metal brackets (3M Unitek) was used to bond brackets. In group I and II light curing was done using Light-emitting diode light curing units without and with the dental chair light respectively. After bonding, all samples were stored in distilled water at room temperature for 24 hours and subsequently tested for shear bond strength and Adhesive Remnant Index (ARI) scores. Data was subjected to Mann Whitney U statistical test.

Results: Results indicated that there was significantly higher shear bond strength (7.71 ± 1.90) for the Group II (composite cured with LED and dental chair light) compared with Group I (composite cured with LED LCU only) (5.74 ± 1.13).the obtained difference was statistically significant. There was no statistical significant difference between ARI scores in between the groups.

Conclusions: light cure bonding with dental chair light switched on will produce greater bond strength than the conventional bonding. However, the ARI score were similar to both the groups. It is advised that the inexperienced orthodontist should always switch off the dental chair light while bonding for enough working time during the bracket placement.

Keywords: ARI score; composite resin; dental chair light; shear bond strength.

PubMed Disclaimer

Conflict of interest statement

• Conflict of interest: none declared.

Figures

Figure 1
Figure 1
Sample after bonding
Figure 2
Figure 2
UTM during debonding process. (Sample placed in the cross head)
Figure 3
Figure 3
SEM Images of Teeth Surfaces
Graph 1
Graph 1
Distribution of adhesive remnant index (ARI) scores in Group I and Group II samples
Graph 2
Graph 2
Mean, standard deviation (SD) and median values of adhesive remnant index (ARI) scores in Group I and Group II samples
See this image and copyright information in PMC

References

    1. White LW. The Past, present and future perfect profession. J Clin Orthod. 2001;35:465–70. - PubMed
    1. Santos GB, Medeiros IS, Fellows CE, Muench A, Braga RR. Composite depth of cure obtained with QTH and LED units assessed by microhardness and micro Raman spectroscopy. Oper Dent. 2007;32:79–83. - PubMed
    1. Fan PL, Stanford CM, Stanford WB, Leung R, Stanford JW. Effect of backing reflectance and mold size on polymerization of photo-activated composite resin. J Dent Res.1984; 63:1245–7. - PubMed
    1. Johnson WM, Leung RL, Fan PL. A mathematical model for post-irradiation hardening of photo-activated composite resins. Dent Mater. 1985;1:191–4. - PubMed
    1. Powell GL, Kelsey WP, Blankenau RJ, Barkmeier WW. The use of an argon laser for polymerization of composite resin. J Esthet Dent. 1989;1:34–7. - PubMed

LinkOut - more resources