Combined Effect of Soft and Energy Drinks and Simulated Tooth Brushing on Color Stability and Surface Roughness of 3D-Printed Permanent Restorative Materials: An In-Vitro Study.

Description :

The growing use of 3D-printed permanent restorative materials in digital dentistry calls for a better understanding of their long-term esthetic performance under realistic oral conditions. While these materials offer benefits such as reduced material waste, high precision, and efficient fabrication, their resistance to daily chemical and mechanical challenges has not been fully studied. This study aims to evaluate the combined effect of acidic beverage exposure and simulated tooth brushing on the color stability and surface roughness of three commercially available 3D-printed permanent restorative resins. Acidic drinks like soft drinks and energy drinks are widely consumed and contain low pH and staining agents that may cause surface degradation and discoloration of resin-based materials. Additionally, routine tooth brushing introduces mechanical abrasion that can further alter surface properties. Disk-shaped specimens made from three different 3D-printed restorative materials will be created using standardized CAD/CAM workflows and manufacturer-recommended printing systems. After polishing and establishing baseline measurements, the specimens will be immersed in Pepsi®, Red Bull®, or distilled water and stored at 37°C for an accelerated aging period of 28 days. Half of the specimens will also undergo simulated tooth brushing to mimic mechanical wear. Color stability (ΔE00) and surface roughness (Ra/Sa) will be measured at baseline, 14 days, and 28 days. Statistical analysis will evaluate the effects of material type, immersion medium, brushing condition, and time. The findings will help determine whether these materials can maintain clinically acceptable esthetic properties under typical dietary and hygiene conditions.

Titulaire :
MEHANNA ZOGHEIB Carina

Contact USJ :
carina.mehannazogheib@usj.edu.lb

Chercheur(s) :
Dr Carina MEHANNA ZOGHEIB
M. Khalil KHARMA
Dr Karim CORBANI


Projet présenté au CR, le : 01/11/2025

Projet achevé auprès du CR : 31/07/2026