Enamel changes in permanent teeth after trauma to their primary predecessors

Abstract

abstract – The frequency of developmental disturbances in the permanent dentition due to traumatic injuries to primary teeth was examined in a Danish population sample consisting of 487 schoolchildren 9–17 years old. Of these children, 147 (30%) had a history of traumatic injuries to the primary dentition. Frequencies of 57.8% and 45.3% of developmental disturbances were found in the trauma and in the non‐trauma group, respectively. The folloing types of developmental disturbances were more frequent in the trauma group than in the non‐trauma group: (1) internal white enamel hypoplasia with a diameter of 0.5 mm or more, (2) internal and external white and yellow‐brown enamel hypoplasia, (3) white and yellow‐brown enamel hypoplasia and horizontal enamel hypoplasia. Internal white enamel hypoplasia with a diameter of less than 0.5 mm, and generalized internal and external white enamel hypoplasias were found with the same frequency in the two groups. About 10% of enamel hypoplasias in anterior teeth are due to trauma.