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ORIGINAL RESEARCH Table of Contents   
Year : 2009  |  Volume : 20  |  Issue : 1  |  Page : 60-64
An evaluation of the color stability of tooth-colored restorative materials after bleaching using CIELAB color technique


Department of Conservative Dentistry and Endodontics, Saveetha Dental College and Hospitals, Chennai, India

Correspondence Address:
Y Madhukar Rao
Department of Conservative Dentistry and Endodontics, Saveetha Dental College and Hospitals, Chennai
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0970-9290.49071

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Aims and Objective: The aim of this laboratory study was to evaluate the effect of three home bleaching agents: Vivastyle Paint On, Vivastyle, and Opalascence PF on the color stability of the microfilled composite Durafill, the nanofilled composite Filtek Z 350, and the glass ionomer cement Fuji II. Materials and Methods: There were 3 groups in this study (n=40)-Group I: durafill, Group II: Filtek Z 350, and Group III: Fuji II. Each group was further subdivided into 4 subgroups (n=10), Subgroup A: bleaching with Vivastyle Paint On, Subgroup B: bleaching with Vivastyle, Subgroup C: bleaching with Opalascence PF, and Subgroup D: control specimens stored in distilled water. Bleaching was carried out following the manufacturer's instructions for a period of 14 days. At the end of the bleaching regimen, the specimens were tested for color change using the CIELAB technique and a reflectance spectrophotometer. Results: The data was subjected to statistical analysis. A Kruskal-Wallis variance analysis and Mann Whitney U test were done to determine the significant color change of the restorative materials. All restorative materials demonstrated a significantly higher color change (ΔE) with Vivastyle ( P < 0.0001). The mean color change of GIC (11.4 0.3) was the highest among the materials followed by Durafill (7.5 0.1). Filtek z 350 (0.3 0.1) showed the least color change with all the bleaching agents. Conclusion: Glass ionomer cement showed the highest color change followed by the microfilled composite. The nanofilled composite was found to be highly stable in terms of color.


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