IADR Abstract Archives
Dental Development and the Occurrence of Aberrant Occlusal Dental Traits
Objectives: To study the association between timing of dental development and the occurrence of anomalous dental traits such as crowding, tooth impaction and hypodontia
Methods: This study was performed using 4446 ten year old children from a multiethnic birth cohort, the Generation R Study. Dental development was defined using the Demirjian method. Crowding, impaction and hypodontia were ascertained from 2D and 3D pictures, and radiographs. We built three series of logistic regression models to test the associations of dental age with crowding, impaction and hypodontia. Similar models were built to investigate the associations of the developmental stages of each left mandibular tooth with crowding, impaction and hypodontia.
Results: Inverse associations were found between every one-year increase in dental age and the presence of crowding (OR=0.84, 95% CI: 0.79, 0.89), impaction of teeth (OR=0.66, 95% CI: 0.52, 0.84) and hypodontia (OR=0.52, 95% CI: 0.47, 0.56). Lower developmental stages of the second premolar were associated with the presence of crowding (OR=0.90, 95% CI: 0.83, 0.98). Lower developmental stages of the second premolar (OR=0.88, 95% CI: 0.79, 0.98), first molar (OR= 0.76, 95% CI: 0.65, 0.90) and the second molar (OR=0.83, 95% CI: 0.73, 0.94) were associated with the presence of tooth impaction. Lower developmental stages of all mandibular teeth except the central incisor were associated with hypodontia (p<0.05).
Conclusions: Accelerated dental development is associated with lower occurrence of crowding, impaction and hypodontia. Our findings add knowledge to the etiological factors related to malocclusion and therefore could help to not only improve patient care but also the communication with the patient. Further research on factors of delayed dental development might aid to find the correct timing for orthodontic treatment and to prevent the occurrence of more severe aberrant dental traits in children.
Methods: This study was performed using 4446 ten year old children from a multiethnic birth cohort, the Generation R Study. Dental development was defined using the Demirjian method. Crowding, impaction and hypodontia were ascertained from 2D and 3D pictures, and radiographs. We built three series of logistic regression models to test the associations of dental age with crowding, impaction and hypodontia. Similar models were built to investigate the associations of the developmental stages of each left mandibular tooth with crowding, impaction and hypodontia.
Results: Inverse associations were found between every one-year increase in dental age and the presence of crowding (OR=0.84, 95% CI: 0.79, 0.89), impaction of teeth (OR=0.66, 95% CI: 0.52, 0.84) and hypodontia (OR=0.52, 95% CI: 0.47, 0.56). Lower developmental stages of the second premolar were associated with the presence of crowding (OR=0.90, 95% CI: 0.83, 0.98). Lower developmental stages of the second premolar (OR=0.88, 95% CI: 0.79, 0.98), first molar (OR= 0.76, 95% CI: 0.65, 0.90) and the second molar (OR=0.83, 95% CI: 0.73, 0.94) were associated with the presence of tooth impaction. Lower developmental stages of all mandibular teeth except the central incisor were associated with hypodontia (p<0.05).
Conclusions: Accelerated dental development is associated with lower occurrence of crowding, impaction and hypodontia. Our findings add knowledge to the etiological factors related to malocclusion and therefore could help to not only improve patient care but also the communication with the patient. Further research on factors of delayed dental development might aid to find the correct timing for orthodontic treatment and to prevent the occurrence of more severe aberrant dental traits in children.