How Does the Color of Restorative Material Change during Exposure to Dietary Liquids Due to the Acquisition of a Discolored Layer?

Abstract

(1) Background: The aim of the paper is to determine how selected staining liquids affect color stability and reflectance of six composite and compomer dental materials. (2) Methods: Six dental materials were chosen for this study: G-aenial (GC), Filtek Z550 (3M), Herculite XRV Ultra (Kerr), Compoglass (Ivoclar Vivadent), Dyract Extra (Dentsply), and Dyract Flow (Dentsply). Ten staining liquids were used (distilled water, tea, tea with sugar, coffee, coffee with sugar, Coca-Cola®, orange and currant juices, soy sauce, and wine). Staining was carried out at 37 °C. The measurements of the color difference (ΔE) and the color parameters were carried out on a Konica Minolta CM5 spetrocolorimeter at different staining times (1, 2, 4, 8, 24, 48, 72, and 168 h). The resulting color change of the dental materials upon staining is presented as plots of ΔE, diffuse-reflection spectra, and Maxwell’s triangle. (3) Results: Significant changes in lightness (ΔL) along with changes in the total color were observed for most materials. Color change was more pronounced in compomers than in composites. (4) Conclusions: Most materials change their color from light cream to light-brown and reddish after exposure to selected staining liquids.

Effect of Vegetable Juices on Properties of Two Resin Composites Used for Dental Caries Management

“…The absorption and adsorption of colourants with different polarities, found in different beverages, on the surface of resin composites have also been proposed as potential factors. Additionally, it has been suggested that silanisation of filler particles plays an important role in discolouration due to the fact that silane has high water absorption levels [4,8,9,11,13].…”

“…As previously described in the literature, the following scale was used to classify the resulting colour difference values (∆E): a difference below 2.0 units in the CIE colour space was classified as unnoticeable, between 2.1 and 3.5 units as slightly perceptible, between 3.6 and 5.0 units as clearly perceptible, and 5.1 units or above as pronounced [11].…”

“…Previous studies on colour stability and surface properties of composites have shown that different beverages, such as coffee, tea, red wine, juices, and carbonated drinks, may affect not only the aesthetic but also the physical properties of composite resins, thereby undermining the quality of the restoration. The effect of beverages on the properties of composite resins may also be directly related to the amount and frequency of their intake [4,8,9,[11][12][13][14][15][16]. Several studies suggest that nanohybrid composites do not exhibit superior stain resistance compared to microhybrid composites when immersed in different beverages.…”

Translucency and Color Stability of a Simplified Shade Nanohybrid Composite after Ultrasonic Scaling and Air-Powder Polishing

“…A change in color may also affect translucency, further altering the initial esthetics [16]. Discoloration of restored teeth over the long-term constitutes a reason for patient dissatisfaction, repeating the polishing procedure, or even restoration replacement [20][21][22]. The composition of the resin matrix, filler loading, and the composition and size of filler particles may also affect composite translucency [6,10,23].…”