الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Objective: The purpose of the study was to assess the reliability and validity of the conventional radiography (PA, occlusal, and OPG) versus CBCT in the localization of impacted maxillaty canine.Materials and Methods: The study sample included 24 patients (8 male, 16 female), with total 30 impacted maxillary canines (18 unilateral, 12 bilateral), the patients age ranged from 14 to 55 years, with mean age 24 years. That undergoes clinical examination, and conventional radiograph; periapical (PA), occlusal, and a panoramic radiograph (OPG) and addition to (CBCT).Results: For labio-palatal localization of IMC crowns there were no significant differences (p>0.05) between PA with Clarks technique and CBCT. While there were a significant differences as (p = 0.05) between the occlusal radiography and CBCT. Also, there were no significant differences between CBCT and OPG for labio-palatal localization of IMC crowns. For labio-palatal localization of IMC root apices there were highly significant differences (p<.001) between PA with the Clark’s technique and CBCT, as well as between the occlusal radiography and CBCT. Detection of root resorptions using OPG and CBCT that caused by IMC there were a significant differences as (P<0.05). There were no significant differences between OPG and CBCT in measuring the angulation of IMC to the mid line. And for the anterior-posterior localization of IMC root tips, and vertical localization of IMC crowns there were no significant difference between (OPG- CBCT) as (P>0.05). Finally, there were significant difference as (p < 0.05) for assessment of the IMC relation to adjacent structures by OPG and CBCT Conclusion: The CBCT it has higher ability to provide valuable diagnostic information compared to conventional radiography even with its higher cost and radiation that exposed to the patient, which makes CBCT first diagnostic tool for localization of IMC, detection of root resorption, and surgical or even orthodontic treatment planning of IMC. As well the periapical radiography by using the Clark’s technique and panoramic radiography can be used for localization and treatment planning of IMC instead of CBCT when it’s not available, but not for detection and assessment the severity of root resorption.