Article Title,Year,Volume,Issue,Page Range,Author A study of traumatized permanent teeth in children 7-15 years. I,1973,66,5,431-452,Hedegård Dental injuries of school-children,1968,61,10,511-516,Nord Multiple fractures,1972,65,7,373-382,Olander Mandibular neck fractures. A clinical and radiographic follow-up study,1972,65,7,363-372,Ridell Traumatized permanent teeth in children aged 7-15 years,1975,68,5,157-169,Hedegård