Affiliation: | 1. Restorative Dentistry Unit, Teaching Hospital, Kandy, Sri Lanka;2. Department of Prosthetic Dentistry, Faculty of Dental Sciences, University of Peradeniya, Peradeniya, Sri Lanka;3. Teaching Hospital, Kurunegala, Sri Lanka;4. Base Hospital, Matale, Teaching Hospital, Kurunegala, Sri Lanka;5. Department of Statistics, Faculty of Science, University of Peradeniya, Peradeniya, Sri Lanka;6. Community Dental Unit, Dental Institute, Colombo, Sri Lanka |