Table 1: Characteristics & contents of composite resins used in this study.

Product

Shade

Composite Resin Type

Synthesis

Manufacturer

Ceram X One Universal

A2

Nanohybrid

Polysiloxane, Poly-urethane-methacrylate, bis-EMA, TEGDMA

Dentsply, Detrey GmbH, Konstanz, Germany

G-aenial Anterior

A2

Hybrid

UDMA, dimethacrylate, co-monomers

GC Corporation, Tokyo, Japan