Color stability and surface roughness of ormocer- versus methacrylate-based single shade composite in anterior restoration

Abstract

Background The blending ability of universal shade composites and their stability in the oral environment are of great concern in restoring anterior teeth. This study aims to evaluate and compare the color stability and surface roughness of two single-shade composite restorations, ormocer-based composite (OBC) and methacrylate resin-based composite (RBC), after storing them in different staining media. Materials and methods In this study, two universal shade composite restorative materials were tested: a nanohybrid OBC (Admira fusion X-tra, Voco) and a supra-nanofilled RBC (Omnichroma, Toukyama). In total, 60 cylindrical centralized cavities (diameter: 5 mm, depth: 2 mm) were prepared in sound extracted-human central incisors and divided into two equal groups according to the restorative material used (n = 30). According to the storage media, the teeth of each group were divided into three subgroups (n = 10): artificial saliva, black tea, and cola. The restoration color was evaluated for all teeth at baseline and after four weeks of storage. The color stability (∆E) was measured using a reflective spectrophotometer (X-Rite, model RM200QC, Neu-Isenburg, Germany). The surface roughness (Ra) was evaluated using three-dimensional optical profilometry (Wyko, Model NT 1100, Veeco, Tucson, USA). Additionally, the extracted data were analyzed using two-way analysis of variance (ANOVA), one-way ANOVA and Student’s t-test. Results In the baseline evaluation, there were no statistically significant differences with respect to color matching or surface roughness results between the two studied restorative materials. However, the differences were statistically significant after storing them in different media. Conclusion Universal composites showed satisfactory color matching with different teeth colors and accepted surface smoothness, whereas the aging procedure exerted a negative effect on their color stability and surface characteristics.

In Vitro Color Stability Evaluation of Three Polished and Unpolished Nanohybrid Resin Composites Immersed in a 0.12% Chlorhexidine-Based Mouthwash at Different Times

“…Furthermore, the choice of the Sof-Lex polishing disc system was based on its reported considerable decrease in resin surface roughness compared to other polishing systems [ 29 , 30 , 31 , 32 , 33 ]. This system was also used as the standard protocol because of its ability to form smooth surfaces that are less susceptible to chemical solubility [ 34 ].…”

Effect of aging and fiber‐reinforcement on color stability, translucency, and microhardness of single‐shade resin composites versus multi‐shade resin composite

“…16 However, despite recent advancements in composite resin products, their resin matrices are still susceptible to greater moisture absorption than ceramics, making them more prone to penetration. 4 Restorative materials must reproduce both the color and translucency of natural teeth to make a restoration imperceptible, and they should have long-term color stability. 17 Translucency is a significant optical property of resin composites, and it is determined by the color difference of a material with uniform thickness on a white and black background, commonly referred to as the translucency parameter (TP) in dentistry.…”

“…Internal color stability also affects the long‐term esthetics of restorations 16 . However, despite recent advancements in composite resin products, their resin matrices are still susceptible to greater moisture absorption than ceramics, making them more prone to penetration 4 . Restorative materials must reproduce both the color and translucency of natural teeth to make a restoration imperceptible, and they should have long‐term color stability 17 .…”

“…3 The various color shades and technical sensitivities make the color selection of resin composite materials a complex process. 4,5 In order to get a suitable esthetic effect, the color of the substrate should be considered while planning the restoration. In certain clinical scenarios, physicians are expected to hide the substrate with the restoration; in others, physicians might benefit from an intact color substrate and so use less opaque materials that exploit the color of the underlying tissue.…”

“…14 Discoloration may arise from intrinsic factors associated with the resin material and extrinsic factors, such as pigments from food and beverage absorption. 4,15 Internal color stability also affects the long-term esthetics of restorations. 16 However, despite recent advancements in composite resin products, their resin matrices are still susceptible to greater moisture absorption than ceramics, making them more prone to penetration.…”