Saha M, Bansal S, Pathak V, Bhardwaj S, Chauhan A, Nirwan A. A comparative evaluation of fracture load of monolithic and bilayered zirconia crowns with and without a cervical collar: an in vitro study. Medicine and Pharmacy Reports [Internet]. 24Apr.2019 [cited 29May2020];92(2):172-7. Available from: https://medpharmareports.com/index.php/mpr/article/view/985