By Amr M. Elnaghy, BDS, MSc, PhD,* and Shaymaa E. Elsaka, BDS, MSc, PhD†
From the Departments of *Conservative Dentistry and Endodontics and †Dental Biomaterials, Faculty of Dentistry, Mansoura University, Mansoura, Egypt.
Address requests for reprints to Dr Amr M. Elnaghy, Department of Conservative Dentistry and Endodontics, Faculty of Dentistry, Mansoura University, Mansoura PC
35516, Egypt. E-mail address: aelnaghy@mans.edu.eg