The accuracy (trueness and precision) of Bellus3DARC-7 and an in-vivo analysis of intra and inter-examiner reliability of digital and manual anthropometry

Abstract Background Three dimensional (3D) facial imaging is becoming a popular method of analysis and means anthropometry. There potential for 3D to provide enough diagnostic information parallel lateral cephalograms, which could, in time, reduce the need radiation exposure patients. The present study aimed assess accuracy Bellus3D ARC-7 (Bellus) camera by comparing measurements soft tissue landmarks obtained from Bellus scans taken using Vernier callipers. Method Nineteen anatomical points were located on four subjects standard black ballpoint pen white, circular sticker. Distances measured between these digital callipers, with subject resting pose. This was repeated twice two examiners each subject. Two subsequently performed smiling Following landmark identification, images captured under conditions, camera. same digitally, both poses. Results high precision models, less than 1.5 mm deviation measurements. Both intra-examiner inter-examiner reproducibility greater following compared manual measurements, 100% falling within set threshold ≤1.5 mm. When greatest deviations (>1.0 mm) occurred regions around cheeks lower third face, while ears midline structures (forehead nose bridge) deviated least (≤1.0 mm). demonstrated models at rest smiling. Conclusions system produced an accurate true image face reproducible can be made examiners. comparable direct anthropometry, therefore use scanning orthodontics diagnosis treatment planning appears promising.