References for enamel fractures

• Stålhane I, Hedegård B. Traumatized permanent teeth in children aged 7–15 years. Part II. Swed Dent J 1975; 68: 157–169.
• Ravn JJ. Follow-up study of permanent incisors with enamel fractures as a result of an acute trauma. Scand J Dent Res 1981; 89: 213-217.
• Flores MT, Andersson L, Andreasen JO, Bakland LK, Malmgren B, Barnett F, Bourguignon C, DiAngelis A, Hicks L, Sigurdsson A, Trope M, Tsukiboshi M, von Arx T. Guidelines for the management of traumatic dental injuries. I. Fractures and luxations of permanent teeth. Dent Traumatol 23: 66-71: 2007.
• Moorrees CF, Fanning EA, Hunt EE. Age variation of formation stages for ten permanent teeth. J Dent Res 1963; 42: 1490-1502.
• Andreasen JO, Andreasen FM, Bakland LK, Flores MT. Crown fracture without pulp exposure. Traumatic Dental Injuries. A Manual. Oxford: Blackwell/Munksgaard Publishing Company. 2003, 28-29.
• Andreasen FM, Andreasen JO. Crown fractures. In: Andreasen JO, Andreasen FM, Andersson L, (eds.). Textbook and Color Atlas of Traumatic Injuries to the Teeth (4^th ed.). Oxford, Blackwell 2007. 280-305.

The data collected from this study have been used in prognosis calculations.