incisor apices. An estimate should also be made of the tooth's angulation and the
position of its apex relative to the line of the arch.
Other radiographic signs that may suggest an abnormal path of eruption are: obvious
asymmetry between the positions of the two upper canines; lack of resorption of the
root of the primary canine on the affected side (947HFig. 14.19); and resorption of
permanent incisor roots (948HFig. 14.17). If there are signs of incisor resorption, urgent
advice and treatment should be sought.
949H
Fig. 14.18 Parallax location of |3. (a) Radiograph taken with the tube positioned
forward shows that the image of the canine crown is slightly mesial to the image of