Abstract
Background: Panoramic radiography creates distortion in teeth position and inclination especially in lateral areas of the arches due to acquisition and curved shape of dental arch. The aim of this study was to evaluate panoramic distortion compared to cone-beam computed tomography. Methods: Mesiodistal angulations were measured on panoramic radiography. Mesiodistal angulations and buccolingual inclinations of the teeth were determined on cone-beam computed tomography scans. The previous measurements were then compared through Pearson correlation coefficient. Results: The results showed higher correlation between mesiodistal 2D angulation and buccolingual 3D inclination, especially for first premolars, rather than between mesiodistal angulations measured in 2D and 3D. Conclusion: Especially for the lateral areas of the dental arches, root mesiodistal angulation measured on panoramic radiography is not reliable; in fact, it is greatly influenced by buccolingual inclination. Therefore, clinical evaluation is highly recommended with panoramic radiography to provide correct diagnosis and the most satisfactory results.
Highlights
In order to approach predefined cephalometric and occlusal standards, orthodontic treatment has to correct tooth positions in three planes of space [1,2]
Data analysis showed a similar linear trend related to panoramic radiography mesiodistal angulation and Cone-beam computed tomography (CBCT) buccolingual inclination, concerning upper first premolars
Medium-high correlations were detected when panoramic radiography mesiodistal angulations were compared with CBCT buccolingual inclinations but only for the first premolars
Summary
In order to approach predefined cephalometric and occlusal standards, orthodontic treatment has to correct tooth positions in three planes of space [1,2]. Establishing appropriate tooth axial inclinations (mesiodistal and buccolingual) allow for getting root parallelism, which is important to obtain an ideal alignment of the teeth, a normal occlusion, and a stable treatment result, especially in premolar extraction cases. Head positioning and patient movements affect the panoramic image quality [19] For all these reasons, panoramic radiography does not provide an accurate representation of the true mesiodistal root angulations [19,20,21,22,23,24,25,26,27]. Conclusion: Especially for the lateral areas of the dental arches, root mesiodistal angulation measured on panoramic radiography is not reliable; it is greatly influenced by buccolingual inclination. Clinical evaluation is highly recommended with panoramic radiography to provide correct diagnosis and the most satisfactory results
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call