Effects of whitening gels on color and surface properties of a microhybrid and nanohybrid composite

Abstract

The aim of this study was to compare color changes, surface roughness and gloss of a microhybrid and nanohybrid composite whitened in a simulated in-office or at-home procedure using 40% hydrogen peroxide or 16% carbamide peroxide, respectively. CIELab coordinates were measured before, during and after treatment using VITA EasyShade V (VITA) and ∆E00 calculated. Surface roughness was measured using a surface roughness tester (SJ210; Mitutoyo). Gloss was measured using a gloss checker (IG-331; Horiba). At-home whitening resulted in ∆E00 of 1.23±0.49 (microhybrid) and 1.01±0.76 (nanohybrid). In-office exposure resulted in ∆E00 of 0.69±0.38 (microhybrid) and 0.72±0.50 (nanohybrid). There were no significant differences in ∆E00, surface roughness and gloss between whitening protocols (p>0.05). Color changes of a microhybrid and nanohybrid composite following simulated in-office or at-home whitening reached CIEDE2000 50:50% perceptibility but not acceptability threshold. Surface roughness and gloss of the microhybrid and nanohybrid composite were not affected by whitening.

Changes in physical properties of universal composites andCAD/CAMmaterials after bleaching and antioxidant applications: Scanning electron microscope and atomic force microscope evaluation

“…There is no direct indication in the application brochure of this device for its use in color measurement of resin‐based materials. However, when other studies in the literature investigating the color changes of resin‐based restorative materials were examined, it was seen that the measurements were made with the VITA Easyshade V (Floriani et al, 2022; Hong et al, 2022; Karakaya & Cengiz, 2017; Savic‐Stankovic et al, 2021). This device was preferred in our study to ensure that the results of our study were comparable.…”

Comparison of Bond Strength of Bulkfill and Conventional Composites as Composite Repair Materials

“…Mikrohibrit kompozitler mikro ve nano boyuttaki (∼20 nm) cam dolduruculardan oluşurken, nanohibrit kompozitler nanoboyutta dolduruculara ek olarak 0.6-1 µm büyüklüğündeki doldurucular ve/veya prepolimerize doldurucular da içerir. 13,14 Supra-nano yapıdaki kompozit rezinler ise, mikrondan daha küçük ve nanometreden daha büyük boyuttaki doldurucuları içeren bir yapıda olduğundan bu tanımı almıştır. 15 Bulkfill kompozitler geleneksel kompozitlerle kıyaslandığında 4-5 mm kalınlığa kadar uygulanabilir olmasıyla hekime kolaylık sağlaması ve zaman kazandırması gibi avantajları nedeniyle günümüzde popülaritesi artan materyallerdendir.…”