الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Impaction of the permanent maxillary canines is a serious dental development disorder that affects about 3% of the general population. The maxillary canine has the longest development period and the most complicated eruption path. Its final position in the occlusion is critical for the completion of the arch form, a functional occlusion, and dental symmetry and harmony. Except for third molars, the maxillary canine is the most often impacted tooth. The planning of surgical and orthodontic treatment to treat canine impactions relies heavily on radiographic assessment. The relative labio-palatal locations of impacted canines, as well as the proximity to adjacent teeth, are determined using radiographic imaging. In the horizontal, vertical, and sagittal axes, CBCT images enable for thorough localization of impacted canines and their relationship to neighboring teeth and other anatomical structures.
The aim of this study was to evaluate the IMPC location on 3D images and to determine positional components associated with impaction severity. This study included forty CBCT scans of 40 IMPCs where several angular and linear measurements on the OPG, axial, sagittal, coronal, and 3D views were measured and then based on the angle between the IMPC and their future treated position, or as it was referred in the research as “virtual aligned canine position”, the sample was divided into three different severity groups.
Conclusions:
1. Cone beam CT images enable thorough localization of impacted canines and their relationship to neighboring teeth and other anatomical structures, therefore, its use in the diagnosis of the impacted canines is a crucial step to assess the severity level of the case and subsequently the optimum treatment decision.
2. Severity of canine impaction is not only a factor of canine cusp position, but also the root apex position in mesiodistal and labiolingual position is of high diagnostic effect since root movement during canine alignment may result in root resorption of the canine itself or the adjacent teeth especially if the distance of root movement needed is large.