5Andreasen JO, Andreasen FM. Textbook and color atlas of traumatic injuries to the teeth[M]. Copenhagen: Munksgaard, 1994: 151-216.
6World Health Organization. Application of the international classification of diseases and stomatology, ICD-DA [M]. 2nd ed. Geneva: World Health Organization, 1978: 88-89.
7Feliciano KM, de Franca Caldas A Jr. A systematic review of the diagnostic classifications of traumatic dental injuries[J]. Dent Traumatol, 2006, 22 (2) : 71-76.
8Andreasen FM, Pedersen BV. Prognosis of luxated permanent teeth-the development of pulp necrosis[J]. Endod Dent Traumatol, 1985, 1 (6) : 207-220.
9Andreasen FM. Pulpal healing after luxation injuries and root fracture in the permanent dentition[J]. Endod Dent Traumatol, 1989, 5 (3) : 111-131.
10Andreasen FM. Histological and bacteriological study of pulps extirpated after luxation injuries[J]. Endod Dent Traumatol, 1988, 4(4) : 170-181.
6Flores MT,Andreasen JO,Bakland LK,et al.Guidelines for the evaluation and management of traumatic dental injuries[J].Dent Traumatol,2001,17(3):97-102.