Abstract
Impaction of a mandibular premolar is relatively uncommon. Ectopic placement is more unusual and there has been no discussion in the literature of an ectopic mandibular premolar in the coronoid process. In this case report, we present an impacted ectopic mandibular permanent premolar in the sigmoid notch (incisura mandibulae) region. Etiology of the tooth and treatment options are discussed and illustrated by Cone Beam Computed Tomography (CBCT) images.
Highlights
Ectopic eruption is an anomalous situation in which the tooth does not trace its usual route [1]
Ectopic teeth have been occasionally discovered in unusual orientations or at a distance from their normal anatomic position, for example, in the orbit, maxillary antrum, nasal cavity, nasal septum, mandibular condyle, coronoid process, palate, and chin [2, 3]
We report a case of an ectopic mandibular premolar located in the sigmoid notch with Cone Beam Computed Tomography (CBCT) that seems to have been displaced by neither cyst nor tumor
Summary
Ectopic eruption is an anomalous situation in which the tooth does not trace its usual route [1]. Ectopic teeth have been occasionally discovered in unusual orientations or at a distance from their normal anatomic position, for example, in the orbit, maxillary antrum, nasal cavity, nasal septum, mandibular condyle, coronoid process, palate, and chin [2, 3]. Especially third molars, which are impacted far away from their original sites have been affected by a cyst or tumor. A few cases have been reported without associated cystic lesion [4]. We report a case of an ectopic mandibular premolar located in the sigmoid notch with Cone Beam Computed Tomography (CBCT) that seems to have been displaced by neither cyst nor tumor
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