Cysts In Orofacial Regions

Cysts In Orofacial Regions

Question. Classify cysts of the orofacial region. Describe clinical features, radiographic features, and radiographic differential diagnosis of dentigerous cyst.
Answer. For classification, clinical features and radiographic features of dentigerous cyst refer to Answer 1 of the same chapter.

Cysts in Orofacial Regions: Types, Symptoms, and Treatment

Radiographic Differential Diagnosis

• Ameloblastic fibroma and ameloblastoma: In their radiographic picture, they generally show a multilocular appearance, as well as covering of the lesion by the crown is not evident.
• Calcifying odontogenic cyst: During radiographic examination, it is seen as pericoronal radiolucency, and at places it may also show calcification.
• Hyperplastic follicle: On radiographic examination size of a normal follicle is 2–3 mm. If it extends beyond 5 mm, then a dentigerous cyst can be suspected.
• Odontogenic keratocyst: On radiographic examination, bony expansion is not seen.
• Adenomatoid odontogenic tumor: These are rare and seen in the maxillary anterior region.
• Developmental primordial and follicular primordial cyst: It occurs near the crown of unerupted teeth, and superimposition of image may cause cyst-like radiolucency to appear as dentigerous cyst on radiograph. In a primordial cyst, the cystic lining surrounds the crown, while in anodontogenic cyst, it is attached to the neck of the tooth.