1. Department of Oral Health Practice, Division of Restorative Dentistry, College of Dentistry, University of Kentucky, Lexington, Ky.
2. Faculty of Dentistry, Taibah University, Almadena Almunawaara, Kingdom of Saudia Arabia.
3. Department of Oral Health Practice, College of Dentistry, University of Kentucky, Lexington, Ky.