5Zuhal K, Semra OE, Huseyin K. Traumatic injuries of the permanent ineisors in children in southern Turkey: A retrospeetive study [J]. Dent Traumatol, 2005, 21(1):20-25.
6Andreasen JO,Andreasen FM.Textbook and color atlas of traumatic injuries to the teeth[J]. Circulation,2007,116:886-892.
3Robertson A, Andreasen FM, Andreasen JO, et al. Long-term prognosis of crown-fractured permanent incisors. The effect of stage of root development and associated luxation injury[J]. Int J Paediatr Dent, 2000, 10(3) : 191-199.
4Robertson A. A retrospective evaluation of patients with uncomplicated crown fractures and luxation injuries[J]. Endod Dent Traumatol, 1998, 14 (6) : 245-256.
5Ravn JJ. Follow-up study of permanent incisors with enamel fractures as a result of an acute trauma[J]. Scand J Dent Res, 1981, 89(3) :213-217.
6Ravn JJ. Follow-up study of permanent incisors with enameldentin fractures after acute trauma[J]. Scand J Dent Res, 1951, 89 (5) : 355-365.
7Olsburgh S, Jacoby T, Krejci I. Crown fractures in the permanent dentition: Pulpal and restorative considerations [J]. Derit Traumatol, 2002, 18 (3) : 103-115.
8Bergenholtz G. Pathogenic mechanisms in pulpal disease[J].J Endod, 1990, 16(2):98-101.
9Andreasen JO, Andreasen FM, Skeie A, et al. Effect of treatment delay upon pulp and periodontal healing of traumatic dental injuries--a review article[J]. Dent Traumatol, 2002, 18(3): 116-128.
10Ciucchi B, Bouillaguet S, Holz J, et al. Dentinal fluid dynamics in human teeth in vivo[J]. J Endod, 1995, 21(4):191-194.
