Volumetric Evaluation of Maxillary Lateral Incisor Root Resorption due to Positional Variations of Impacted Canine

Abstract

Introduction. The purpose of this study was to investigate the relationship of the volume of lateral incisor resorption and impacted canine features. Materials and Methods. This study consisted of CBCT images of 47 samples with unilateral impacted maxillary canine (13 males and 34 females). The volume of lateral incisors in impacted side and nonimpacted side was calculated with the Mimics 10.01 software. Canine and lateral incisor angulations were measured in panoramic reformatted images. The canine cusp tip distance from midpalatal suture was measured in axial cross-section images. Results. The difference between two sides volume was considered as the mean volume of resorption (MVR) that was statistically significant ( P < 0.001 ). MVR was not statistically significant between two sexes ( P = 0.95 ), in buccopalatal and mesiodistal positions of impacted canine, and in different angulations or distances of the impacted canine to midline ( P > 0.05 ). The concurrent effect of the canine distance to the midline and the angle of the canine with the lateral incisor on the MVR were statistically significant ( P = 0.049 ). Conclusion. The maximum rate of lateral root resorption is when the distance from the canine to the midline is less than 5 mm and the angle of the canine to the lateral incisor is 30–60 degrees.

Investigation of the Relationship of Impacted Maxillary Canines with Orthodontic Malocclusion: A Retrospective Study

“…In the literature, in contrast to studies examining the incidence and prevalence of impacted maxillary canines and their relationship with malocclusion, there are also studies examining local complications caused by maxillary canines, such as lateral tooth resorption [ 28 , 29 ]. In one of these studies, Dağsuyu et al [ 30 ] evaluated the localization, angulation, and resorption characteristics of maxillary impacted canines with CBCT and found no statistically significant difference between the distances of right and left impacted canines to the occlusal plane, similar to the findings in the present study.…”

Influence of alveolar bone thickness and bucco-palatal inclination on root resorption of lateral incisors in unilateral maxillary impacted canines: a retrospective observational study

“…The etiology of root resorption in patients with impacted canine has not been fully uncovered. Several possible risk factors have been suggested, such as patient gender, canine apex, vertical canine crown position, canine magnification, the canine distance to the midline and so on [ 11 – 13 ]. It is noteworthy that almost all the instances of root resorption occur at the contact area between the impacted canine and adjacent teeth, indicating that close contact may be the cause of root resorption [ 9 , 14 ].…”