en Radiology Radiology Original article Original article <strong><span dir="LTR">Background and Aim:</span></strong><span dir="LTR"> Clinical and radiographic diagnoses of dental root fractures have always been difficult and require high accuracy in dental care and treatment. The aim of this study was to compare the diagnostic accuracy of intraoral digital radiography (PSP) and CBCT in the detection of horizontal and vertical root fractures (HRF and VRF).</span><br> <strong><span dir="LTR">Materials and Methods: </span></strong><span dir="LTR">For this experimental study, 60 human mandibular teeth (30 anterior and 30 posterior multi-rooted teeth) were selected. Thirty randomly-selected teeth were fractured horizontally while the next 30 randomly-selected teeth were fractured vertically by use of a hammer and then the pieces were glued back together and were placed in a sheep mandible. Radiographic images of all the teeth were taken using intraoral digital radiography (PSP) and CBCT methods. Afterwards, two oral and maxillofacial radiologists assessed the images separately. The data were subjected to diagnostic analytic tests.</span><br> <strong><span dir="LTR">Results:</span></strong><span dir="LTR"> There were significant differences in specificity, sensitivity, positive predictive value and negative predictive value between digital intraoral radiography (PSP) and CBCT in the detection of HRF and VRF. Kappa value for inter-observer and intra-observer agreement in VRF equaled 73.3% for CBCT and 54.2% for PSP, while in HRF it equaled 63.3% for CBCT and 55.4% for PSP.</span><br> <strong><span dir="LTR">Conclusion:</span></strong><span dir="LTR"> CBCT method has higher specificity and sensitivity in the detection of HRF and VRF compared with intraoral digital radiography.</span><br> <div dir="rtl" style="margin: 0cm 0cm 0pt; line-height: normal;"></div> Intraoral digital radiography, Photostimulable Phosphor Plate, Cone Beam Computed Tomography, Horizontal root fracture, Vertical root fracture 32 38 http://jrdms.dentaliau.ac.ir/browse.php?a_code=A-10-357-1&slc_lang=en&sid=1 AR Talayi Pour 10031947532846009060 10031947532846009060 No professor,Oral and maxilofacial Radiology Dept , Dental Branch, Ialamic azad university tehran,Iran L Hafezi 10031947532846009061 10031947532846009061 No Associated professor, Oral and maxilofacial Radiology Dept , Dental Branch, Ialamic azad university tehran,Iran A Yarahmadi اعظم یاراحمدی dr.yarahmadi169@yahoo .com 10031947532846009062 10031947532846009062 Yes Postgraduate Student, Oral and maxilofacial Radiology Dept , Dental Branch, Ialamic azad university tehran,Iran دانشکده دندانپزشکی ازاد تهران A Ghaznavi 10031947532846009063 10031947532846009063 No Assistant professor, Oral and maxilofacial Radiology Dept, oromeyeh dental branch university A Iranparvar 10031947532846009064 10031947532846009064 No Dentist L Sahabi 10031947532846009065 10031947532846009065 No Dentist