Analysis of the Influencing Factors of Angle Vartiables on Digital Periapical Radiographys
Tie Qi
Shen Jing
Abstract：Objective:Digital periapical radiographys(DPR)was taken from isolated teeth from different angles,and the length of the obtained images was compared with that measured by hand,to analyze the tooth length distortion rate of DPR,explore the impact of perspective on the DPR and provide references for clinical practice.Methods:A total of 30 cases of maxillary central incisor(single canal)completely extracted by Tianjin Stomatological Hospital from December 2023 to April 2024 were selected as study objects.The isolated teeth were manually measured with Vernier calipers to determine the actual length,then,DPR photography was performed on the isolated teeth,and the tube ball was photographed from 0°-30°angles from the distance,near and foot directions,and then the length was measured with software,the distortion rate was calculated by comparing the actual measured length with the angle variable.Prism 8.2.1 and SPSS 20.0 Software were used for statistical analysis to evaluate the accuracy of DPR shooting from multiple angles.Results:Compared with manual actual length measurement,the length of images obtained by taking DPR from different angles was all statistically different(P＜0.05).It was found that the larger the angle,the shorter the tooth length,and the higher the image distortion rate.The length of isolated teeth measured by parallel projection DPR was better than that of other groups,and the distortion rate was the smallest.Conclusion:When shooting DPR,it is necessary to accurately grasp the shooting angle,which can reduce the distortion rate of tooth length to a certain extent,improve the quality of apical films,and reduce missed diagnosis.
Keywords：Digital periapical radiographsAngle variableParalleling technique
Publication Date：2025-10-10
Online Publishing Date：2025-11-05(First online date of this platform, not the publication date of the document)
Pages：3( 2320-2322 )