IADR Abstract Archives
Risk Factors Associated With Root Resorption in Hispanic Orthodontic Patients
Objectives: External apical root resorption (EARR) is a consequence of orthodontic treatment and a serious complication that results in permanent loss of radicular structures. Individuals vary in their susceptibility to EARR and a number of patient-related and treatment-related factors have been implicated in its pathology. The objective of this study is to evaluate the prevalence of EARR in Hispanic orthodontic patients and identify patient related factors associated with an increased risk of developing this disorder.
Methods: Orthodontic records of 129 Hispanic patients (79 females and 50 males) were analyzed. No patients with craniofacial syndromes, history of trauma or prior orthodontic treatment were included. Patients with radiographic evidence of open apices in the incisors and first molars were also excluded. Dolphin Imaging System was used to measure root lengths and crown heights of maxillary incisors. Root resorption was recorded when 20% or more of root structure loss was observed on final radiographs. Chi-square statistics were used to evaluate the effects of patient (gender, age, dental and skeletal classification, incisor proclination, and overjet) and treatment-related (time and type) factors on root resorption.
Results: The overall EARR prevalence in this patient pool was 37.21%. Of the patient related factors significant association with development of EARR was seen with maxillary incisor proclination (p=0.005). Gender was also found to correlate with root resortion, with females presenting with a significantly greater risk of developing EARR (p=0.04). Of the treatment related factors, treatment times greater than 20 months was statistically significantly associated with EARR (p-value=0.03).
Conclusions: Our assessment of EARR prevalence in Hispanic patients indicates that more than a third of these patients will develop moderate EARR with orthodontic treatment. Females and patients with proclined upper incisors have an increased risk for EARR. Long treatments also contribute to root resorption.
Methods: Orthodontic records of 129 Hispanic patients (79 females and 50 males) were analyzed. No patients with craniofacial syndromes, history of trauma or prior orthodontic treatment were included. Patients with radiographic evidence of open apices in the incisors and first molars were also excluded. Dolphin Imaging System was used to measure root lengths and crown heights of maxillary incisors. Root resorption was recorded when 20% or more of root structure loss was observed on final radiographs. Chi-square statistics were used to evaluate the effects of patient (gender, age, dental and skeletal classification, incisor proclination, and overjet) and treatment-related (time and type) factors on root resorption.
Results: The overall EARR prevalence in this patient pool was 37.21%. Of the patient related factors significant association with development of EARR was seen with maxillary incisor proclination (p=0.005). Gender was also found to correlate with root resortion, with females presenting with a significantly greater risk of developing EARR (p=0.04). Of the treatment related factors, treatment times greater than 20 months was statistically significantly associated with EARR (p-value=0.03).
Conclusions: Our assessment of EARR prevalence in Hispanic patients indicates that more than a third of these patients will develop moderate EARR with orthodontic treatment. Females and patients with proclined upper incisors have an increased risk for EARR. Long treatments also contribute to root resorption.