Effect of Conventional in-Office Bleaching and Laser Assisted Bleaching at Two Different Wavelengths on Color Stability of 
Glass-Ionomers

Golkar Taft , Parisa; Jafarnia , Shiva; Tabatabee Ghomshe, Elham; Chiniforush, Nasim; Ranjbar Omrani, Ladan

doi:10.30699/jidai.29.1.7

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Volume 29, Issue 1 (1-2017)

J Iran Dent Assoc 2017, 29(1): 7-14

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Effect of Conventional in-Office Bleaching and Laser Assisted Bleaching at Two Different Wavelengths on Color Stability of Glass-Ionomers

Parisa Golkar Taft¹

, Shiva Jafarnia²

, Elham Tabatabee Ghomshe³

, Nasim Chiniforush⁴

, Ladan Ranjbar Omrani ^*

⁵

1- Assistant Professor, Dental Materials Research Center, Department of Operative Dentistry, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
2- Dentist, Dental School of Tehran University of Medical Sciences, Tehran, Iran
3- DDS, MSC of Operative Dentistry, Private Practice
4- PhD of Laser, Laser Research Center, Tehran University of Medical Sciences, Tehran, Iran
5- Assistant Professor, Department of Operative Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran , ranjbarl@tums.ac.ir

Abstract: (2839 Views)

Background and Aim: Bleaching can improve the color of restorative materials and resolve problems related to discoloration or color mismatch. This study evaluated the effect of in-office bleaching method in conjunction with two different laser wavelengths on color change of two types of glass-ionomer restorative materials (light-cure and self-cure).

Materials and Methods: In this experimental study, thirty samples were fabricated of Fuji IX, and FUJI II LC glass-ionomer restorative material and specimens of each glass- ionomer were divided into three subgroups (n=10) receiving the following treatments:1. Laser assisted in-office bleaching with Opalescence Boost® along with 980nm diode laser; 2. Laser assisted in-office bleaching with Opalescence Boost® along with 810nm diode laser; 3. Conventional in-office bleaching with Opalescence Boost ®. The color of all specimens was evaluated before and after bleaching with Spectro Shade. Data were analyzed using two-way ANOVA followed by Tukey’s HSD test.
Results: Total color change (ΔE) was significantly different before and after bleaching in all groups (P<0.001). In Fuji IX group, there was no significant difference in ΔE between 980nm diode laser and control group (P=0.14). However, the control and 980 nm groups were significantly different with the 810nm diode laser group (P<0.001). No significant difference was found in ΔE of Fuji II LC groups (P=0.082).
Conclusion: Bleaching with or without laser results in a significant color change in light-cure and self-cure glass-ionomers.

Keywords: Glass ionomer, Lasers, Tooth Bleaching

Full-Text [PDF 292 kb] (1257 Downloads)

Type of Study: Original | Subject: Restorative Dentistry

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Golkar Taft P, Jafarnia S, Tabatabee Ghomshe E, Chiniforush N, Ranjbar Omrani L. Effect of Conventional in-Office Bleaching and Laser Assisted Bleaching at Two Different Wavelengths on Color Stability of Glass-Ionomers . J Iran Dent Assoc 2017; 29 (1) :7-14
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