Enamel changes in permanent teeth after trauma to their primary predecessors

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.

Effects on permanent teeth after luxation injuries to the primary predecessors: a study in children assisted at an emergency service

“…A frequency of 126 (20.2%) permanent teeth with alterations was observed. The frequency of disturbances in the permanent dentition caused by traumatic injuries to the primary antecessor varied from 19 to 69% in previous studies (7, 8, 10–16). The white or yellow‐brown discoloration of enamel and the white or yellow‐brown discoloration of enamel with circular hypoplasia were the disturbances most observed in the clinical assessments (78% and 18%, respectively).…”

“…This is in agreement with previous studies (7, 22, 23). This occurrence is explained by the fact that the maturation of mineralized enamel continues until the time of eruption, therefore, discoloration may affect all age groups (12). The breakdown products of hemoglobin from bleeding can incorporate into the tooth during tooth formation, even after arresting the ameloblast activity (24).…”

Relationship between the Presence of Demarcated Opacities and Hypoplasia in Permanent Teeth and Caries in Their Primary Predecessors

“…It has been well documented that the developing permanent teeth may be damaged by trauma to their primary predecessors, with which permanent teeth have a close topographic relationship [Andreasen and Ravn, 1973;Ravn, 1975;Brin et al, 1984;von Arx, 1993]. The defects may vary from opacities to hypoplasia and complete malformation of the permanent tooth [von Arx, 1993].…”

Developmental Malformation of Primary and Permanent Dentition: A Rare Sequel of Trauma

“…the morphogenic, organizing, formative and maturation stage. 10 Experiments in monkeys have shown that circular enamel hypoplasia represents localized damage to the ameloblasts in their formative stages due to traumatic displacement of already formed hard tissue in relation to the developing soft tissue. 10 This would correlate with the crown abnormalities of the upper permanent maxillary central incisors found in the present case.…”