Assessment of bleaching procedures on the optical properties, surface roughness and microhardness of single-shade resin composites: an in-vitro study.

ABSTRACT:

Objective

To evaluate the effects of bleaching on the optical properties, surface roughness, and microhardness of various single-shade resin composites.

Materials and methods

A total of 210 disc-shaped specimens (6 mm × 2 mm) were fabricated using seven single-shade resin composites (Clearfil Majesty ES-2 Universal, Essentia Universal, Vittra Unique, Charisma Topaz One, OneShade, Omnichroma, and Zenchroma) (n = 30 / group). After 24 h of storage in distilled water at 37 (±) 1 °C, all specimens were immersed in a coffee solution for 144 h. Color change (ΔE₀₀), whiteness index (ΔWI_D), translucency parameter (TP), and gloss (GU) were measured using a spectrophotometer and a glossmeter. Surface roughness (Ra) and Vickers microhardness (VHN) were evaluated a

SUBMITTER: Atilan Yavuz S 

PROVIDER: S-EPMC12874974 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature