Effect of amalgam cuspal coverage on the fracture resistance of endodontically treated teeth

1Assistant Professor, Department of Operative Dentistry, School of Dentistry, Shahed University, Tehran, Iran 2Specialist in Restorative Dentistry (etabatabai@gmail.com) 3Associate Professor, Department of Operative Dentistry, School of Dentistry, Tehran University of Medical Sciences, Teharn, Iran 4Assistant Professor, Department of Operative Dentistry, School of Dentistry, Kermanshah University of Medical Science, Kermanshah, Iran 5Endodontist