Comparison of the Effect of Bleaching with 15% Carbamide Peroxide on the Flexural Strength of Three Resin-Based Restorative Materials - Kimyai, Soodabeh; Ghavami Lahij, Yasaman; Daneshpooy, Mehdi; Jafari Navimipour, Elmira; Alizadeh Oskoee, Parnian (Frontiers in Dentistry, 2020)