1. Fereshteh Shafiei, DMD, MSc, professor, Prevention of Oral and Dental Disease Center, Department of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
2. Bahareh Yousefipour, DMD, postgraduate student, Department of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran