Korean J Oral Maxillofac Radiol.  2003 Dec;33(4):211-215.

Radiographic analysis of odontogenic cysts showing displacement of the mandibular canal

• Cho BH

Abstract

PURPOSE
To assess the radiographic findings of odontogenic cysts showing displacement of the mandibular canal using computed tomographic (CT) and panoramic images. MATERIALS AND METHODS: CT and panoramic images of 63 odontogenic cysts (27 dentigerous, 16 odontogenic keratocysts, and 20 radicular cysts) were analyzed to evaluate the following parameters: the dimension and shape of the cysts, and the effect of the cysts on the mandibular canal and cortical plates. RESULTS: Of the 63 cysts examined in the study, 35 (55.6%) showed inferior displacement of the mandibular canal and 46 (73.0%) showed perforation of the canal. There were statistically significant differences between CT and panoramic images in depicting displacement and perforation of the mandibular canal. Cortical expansion was seen in 46 cases (73.0%) and cortical perforation in 23 cases (36.5%). The radicular cysts showed cortical expansion and perforation less frequently than the other cyst groups. CONCLUSION: Large cysts of mandible should be evaluated by multiplanar CT images in order to detect the mandibular canal and cortical bone involvement.

Keyword

Mandible; Odontogenic Cysts; Tomography, Spiral Computed; Radiography, Panoramic

MeSH Terms

Mandible
Odontogenic Cysts*
Radicular Cyst
Radiography, Panoramic
Tomography, Spiral Computed