Errors frequency in intraoral radiographic procedure at different jaws projections made by 3^rd grade dental students

Assessment of accuracy of dental students is essential for educational centers to reduce the retake intra oral film and monitoring the artifacts that made by students. It is necessary to reduce the number of retake radiographs in radiology in order to reduce radiation exposure, money and time. 650 periapical intra oral radiographs taken by bisect-angle and parallel techniques were assessed in this study to detect the presence of artifacts and their frequency. Radiographic images were taken by third year dental students as part of their practical requirements using bisect angle and parallel techniques. Errors were tabled according to location and type. The major errors that were found in the study included (structures overlapping in percentage 15.07%, and the misplacement artifact in percentage 14.67%, the third error in frequency was elongation in percent 10.5. Errors classified according to anatomic location; Mandibular anterior teeth region was the most occurring site for errors with 39.3%, whereas the least errors frequency was 3.1% at maxillary molars projection. Continuous evaluation of students work has great importance for education program development which aim to reduce patient exposure to x-radiation and reduce the wasted time, effort and cost.