1Burton J, Pryke L, Rob M, et al. Traumatized anterior teeth amongst high school students in northern Sydney[J]. Aust Dent J, 1985, 30(5) :346-348.
2Hamilton FA, Hill FJ, Holloway PJ. An investigation of dento- alveolar trauma and its treatment in an adolescent population. Part 1: The prevalence and incidence of injuries and the extent and adequacy of treatment received[J]. Br Dent J, 1997, 182(3):91- 95.
3Forsberg CM, Tedestam G. Traumatic injuries to teeth in Swedish children living in an urban area[J]. Swed Dent J, 1990, 14(3): 115-122.
4Onetto JE, Flores MT, Garbarino ML. Dental trauma in children and adolescents in Valparaiso, Chile[J]. Endod Dent Traumatol, 1994, 10 (5) : 223-227.
5Martin IG, Daly CG, Liew VP. After-hours treatment of anterior dental trauma in Newcastle and western Sydney: A four-year stu- dy[J]. Aust Dent J, 1990, 35(1):27-31.
6Oulis C J, Berdouses ED. Dental injuries of permanent teeth treated in private practice in Athens[J]. Endod Dent Traumatol, 1996, 12 (2) : 60-65.
7Stockwell AJ. Incidence of dental trauma in the Western Austra- lian School Dental Service[J]. Community Dent Oral Epidemiol, 1988, 16 (5) : 294-298.
8Fuks AB, Gavra S, Chosack A. Long-term followup of traumatized incisors treated by partial pulpotomy[J]. Pediatr Dent, 1993, 15 (5) : 334-336.
9Robertson A, Andreasen FM, Andreasen JO, et aL Long-term prog- nosis of crown-fractured permanent incisors. The effect of stage of root development and associated luxation injury[J]. Int J Pae- diatr Dent, 2000, 10(3) : 191-199.
10Cvek M, Lundberg M. Histological appearance of pulps after expo- sure by a crown fracture, partial pulpotomy, and clinical diagnosis of healing[J]. J Endod, 1983, 9(1):8-11.