*Dolanchanpa Dasgupta¹ (1. Professor & Head of the Department ( Prosthodontics and Crown & Bridge)

*TATSUAKI MATSUNAGA^1,2, Yuichiro Yamaguchi², Naoyuki Kaga², Yu Takaesu², Takashi Matsuura² (1. Matsunaga Dental Clinic, 2. Fukuoka Dental College Department of Oral Rehabilitation, Section of Fixed Prosthodontics)

*kohji Nagata^1,2 (1. Department of advanced prosthodontics, graduate school of Tokyo Medical and Dental University, 2. Asclapia Medical and Dental Group)