1. Institute of Clinical Dentistry, School of Dentistry, National Yang-Ming University, 155, Li-Nong Street, Section 2, Peitou, Taipei, Taiwan, Republic of China, Department of Dentistry & Oral-Maxillo-facial Surgery, Taipei Veterans General Hospital, Department of Chemical Engineering, National Taiwan University, Fine Metals Laboratory, Industrial Technology Research Institute, and School of Dentistry, College of Oral Medicine, Taipei Medical University