1. Section of General Dentistry, Department of General Dentistry, Fukuoka Dental College, 2-15-1 Tamura, Sawara-Ku, Fukuoka 814-0193, Japan
2. Fukuoka Dental College, Medical and Dental Hospital, Fukuoka 814-0193, Japan
3. Uma Clínica Dental S.M.M., São Paulo, 04534-003, Brazil