Sung-Kiang CHUANG, DMD, MD, DMSc, Clinical Professor, Department of Oral and Maxillofacial Surgery, University of Pennsylvania, School of Dental Medicine, Philadelphia, PA, USA;Attending, Department of Oral and Maxillofacial Surgery, Good Samaritan Medical Center, Brockton, MA, USA;

Visiting Professor, Department of Oral and Maxillofacial Surgery, Kaohsiung Medical University, School of Dentistry, Kaohsiung, Taiwan;

Visiting Professor, Department of Oral and Maxillofacial Surgery, National University of Singapore, School of Dentistry, Singapore. [email protected].