Cone-beam computed tomography-based registration of crown and root positions. A, Comparison of pretreatment (yellow) and post-treatment (pink) root positions. A small amount of movement is visible in the apical part while the coronal part appears to have moved to a great extent. B, Detection map after registration. The crown and most of the apical part appear dark blue (registration accuracy ≤ 0.15 mm), while the anterior crown is red.