[1] Dental Prosthetic Department, Victor Babes University of Medicine and Pharmacy of Timisoara, Romania
[2] Department of Dental Materials and Dental Prostheses Technology, Victor Babes University of Medicine and Pharmacy of Timisoara, Romania
[3] Politehnica University Timisoara, Romania
[4] Kent Institute of Medicine and Health Sciences, University of Kent, Canterbury, United Kingdom
[5] Applied Optics Group, University of Kent, Canterbury, United Kingdom