Dilaceration, a disturbance in tooth development, generates a sharp angular bend or distinct curvature in the root (Figures 39‑40) or less often, in the crown.7-10 While coronal curvatures may be evident clinically, radicular dilacerations are best revealed radiographically. The most commonly involved teeth tend to be mandibular third molars, maxillary second premolars and mandibular second molars with the maxillary premolars demonstrating the greatest incidence.7,9,10 Although most cases are idiopathic (without a known cause) in nature, this alteration can occur as a result of trauma.7-10, Injury induced dilaceration usually involves anterior teeth or less frequently occurs secondary to impingement of an adjacent anatomic structure or pathologic entity (Figure 41).10 Usually, dilaceration is not problematic but treatment difficulties may be encountered if endodontic treatment or tooth extraction are necessary.7-10
Periapical radiograph of root dilaceration of #4.
Periapical radiograph of root dilaceration #17 and #18.
Dilaceration of tooth #6 secondary to impingement of an adjacent impacted tooth.