Comparative study on fracture resistance of endodontically treated tooth in relation to variable ferrule heights using custom-made and prefabricated post and core: An in vitro stud... oleh Singaravelu Suresh Kumar, Mani Viswanathan, Krishnan Rajkumar, Chinnappan Marudhamani, V Shanmugam Rajaganeshan, K Antony Biju