Color stability of conventional and bulk fill composite resins

Tamara Carolina Trevisan,Suzane Pigossi,Janaína Freitas Bortolatto,Weber Adad Ricci,Marcelo Gusson Júnior,Osmir Batista De Oliveira Júnior

doi:10.1590/1981-863720180001000023125

Tamara Carolina Trevisan, Suzane Pigossi + Show 4 more

Open Access

https://doi.org/10.1590/1981-863720180001000023125

Copy DOI

Abstract

ABSTRACT Objective: This study compared the color stability of different dental composite resins after prolonged exposure to a coffee solution. Methods: Sixty-four cylindrical discs (10 mm diameter x 2 mm thickness) were prepared using 8 different dental composite resins (n=8, per group). The specimens were first immersed in artificial saliva for 24 h followed by immersion in a coffee solution for 14 days. The assessment of chromatic variation (ΔE) was performed with the aid of a Vita Easyshade Advanced spectrophotometer (VITA Zahnfabrik, Bad Sackingen, Germany). The color of each specimen was calculated based on the L*, a* and b* coordinates of the CIELab system. Results: Grandio SO had the lowest average chromatic variation (ΔE=7.77) after immersion in coffee solution. Durafill VS, Grandio and Z350 XT (ΔE=8.58; ΔE=9.52; ΔE=10.39, respectively) showed similar chromatic variation, with no statistical difference in relation to Grandio SO. However, the other dental composite resins evaluated showed statistically higher values of ΔE compared to Grandio SO, and Enamel HRi (ΔE=20.56) demonstrated the highest chromatic variation. Conclusion: The Bulk Fill and hybrid composite resins from the same manufacturer (Micerium, Avegno, Italy) showed greater chromatic variation than the other composite resins tested. Grandio SO (Voco, Cuxaven, Germany) had the lowest ΔE variation.

Highlights

Composite resins are currently the material of choice for both anterior and posterior direct restorations[1], due to their ease of handling, preservation of dental tissue, structural reinforcement, adhesion, low cost and especially the natural appearance of these materials[2,3]
The other dental composite resins evaluated showed statistically higher values of ΔE compared to Grandio SO, and Enamel HRi (ΔE=20.56) demonstrated the highest chromatic variation
The other composite resins evaluated had statistically higher values of ΔE in relation to the Grandio SO (Voco, Cuxaven, Germany), and the resin Enamel HRi MICERIUM (Micerium, Avegno, Italy) presented higher color variation (ΔE= 20.56) after 14 days immersed in coffee solution

Summary

Introduction

Composite resins are currently the material of choice for both anterior and posterior direct restorations[1], due to their ease of handling, preservation of dental tissue, structural reinforcement, adhesion, low cost and especially the natural appearance of these materials[2,3]. The later is directly related to the current aesthetic appeal of clinicians and patients[4]. In this context, manufacturers are constantly motivated to change the composition of their products in the search for composites with aesthetic characteristics suitable for use in both anterior and posterior teeth, while reducing the technical sensitivity for clinicians during restorative procedures. Composites are more susceptible to aging related degradation pathways[8]

Methods

Results

Discussion

Conclusion