1. Department of Endodontics, Faculty of Dentistry, Kocaeli University, Kocaeli, Turkey.
2. Department of Restrorative Dentistry, Faculty of Dentistry, Marmara University, Istanbul, Turkey.
3. Faculty of Health Sciences, Marmara University, Istanbul, Turkey.
4. Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, Dunedin, New Zealand.