Effect of Surface Treatments Applied to 3D Printed Permanent Resins on Shear Bond Strength.

Background: 3D-printed permanent resins have recently been introduced to produce permanent restorations. The aim of this study is to evaluate the effect of surface treatment methods on the shear-bond strength (SBS) between 3D-printed permanent resins and adhesive cement.

Material And Methods: In this study, samples were produced using digital light projection (DLP) and stereolithography (SLA) 3D printers with two permanent resins (Crowntec, Saremco and Permanent Crown, Formlabs) in accordance with manufacturer guidelines.

The effects of dental adhesives total etch; self-etch and selective etch application procedures on microleakage in class II composite restorations.

Purpose: The aim of this study is to evaluate the amount of microleakage resulting from the application of self-etch, selective etch, etch-and-rinse of adhesive systems in class II cavities.

Materials And Methods: Four adhesive systems with etch-and-rinse, selective etch and self etch methods were used on the extracted teeth. All groups were restored with G-aenial A'CHORD (Nanohybrid) (GC, Tokyo, Japan) A2 composite.

Does hot coffee or cold coffee cause more discoloration on resin based composite materials?

Purpose: This study aimed to examine the effect of beverages at different temperatures on the coloring of composites.

Materials And Methods: A total of 48 cylindrical samples, 24 of which were prepared from 2 composite materials (G'aenial; Estelite Σ Quick), were included in the study. The sample dimensions were standardized at 2 x 10 mm2.