WEN Ling-ying (1939-), female, Ph.D. supervisor, professor of Department of Paediatric Stomatology, College of Stomatology, the Fourth Military Medical University; research field: mechanism of tooth root development. JIN Yan (1963-), male, Ph.D., professor of Department of Oral Histology and Pathology, College of Stomatology, the Fourth Military Medical University; research field: tissue engineering.