Use of Cone Beam Computed Tomography for Identification of a Distant Causative Tooth: An Unusual Case of an Apical Lesion from a Maxillary Premolar Mimicking That from Maxillary Incisors

Figure 2

Preoperative CBCT images. Hypodense regions were seen around the apexes of the central and lateral incisors (a, b). Marked apical bone resorption around the lateral incisor (a, c). The palatal root canal of the first premolar was untreated and an apical lesion was observed (d). The apical lesion of the maxillary right first premolar had extensively spread in the anterior direction from the palatal side, destroyed the bone by circumventing the palatal side of the adjacent canine, and reached the apical areas of central and lateral incisors (e).

(a)

(b)

(c)

(d)

(e)