*Wisut Angnanon1, Putsadeeporn Thammajaruk1, Massimiliano Guazzato2
(1. Department of Prosthetic Dentistry, Faculty of Dentistry, Prince of Songkla University, Songkhla, Thailand, 2. Discipline of Prosthodontics, School of Dentistry, Faculty of Medicine and Health, The University of Sydney, New South Wales, Australia)