الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 119 |  |  |
| | | from | 119 | | |
Abstract
The aim of this study is to compare between the diagnostic values of two different radiographic techniques; plain traditional radiographs (including the panoramic radiograph, the maxillary occlusal radiograph and two intra-oral periapical radiographs taken at different horizontal angles by parallax method) and the multi-slice spiral computed tomographic scanning for localization of impacted maxillary canines. Twenty subjects were selected for the study. The patients showed uni/ bi lateral missing permanent maxillary canines.The following criteria were analyzed for each patient from each set of radiograph: the labio-palatal position of the crown of the impacted canine, the labio-palatal position of the root apex of the impacted canine, canine angulation to the midline, the position of the root apex of the impacted canine antro-posteriorally, the vertical position of the canine crown, presence of root resorption of the teeth adjacent to the impacted canine and relation of the impacted maxillary canine to a vital structure ( maxillary sinus and nasal cavity). The results showed that the multi-slice spiral computed tomographic scanning is superior to plain traditional radiographs.There was statistical difference between the two techniques. The information offered by MSCT was relevant and valuable for the determining the surgical approach of the patient. The MSCT could precisely measure and analyze data in millimeters and degrees with the software supplied by the manufacturer. MSCT is a useful method for diagnosing the position, inclination, distance from adjacent structures, complications of impacted canines, and detection of lateral incisors root resorption. Furthermore, this method may have a significant impact on diagnostic and therapeutic interventions. However, prudent judgment based on sufficient consideration of the advantages and disadvantages of MSCT is needed before performing MSCT examination of impacted teeth.