A dentigerous cyst, also known as follicular cyst is a type of odontogenic cyst. This cyst develops from the accumulation of fluid between the reduced enamel epithelium and the crown of an unerupted tooth. It attaches to the tooth neck at the cemetoenamel junction. This is the second most frequently found type of odontogenic cyst.
Some experts suggest that these cysts might be caused due to Periapical inflammation of non-vital deciduous teeth present near the follicles of unerupted permanent successors. The inflammation takes place when the fluid accumulates inside the developmental sac, or follicle around an unerupted tooth. The fluid accumulates once the enamel has finished forming. This results in the cyst getting attached to the tooth at a point where the enamel meets the root.
The symptoms of dentigerous cysts are:
Dentigerous Cysts can be diagnosed through CT and MRI scans. They help in distinguishing this cyst from other cystic lesions that occurs in the oral cavity.
A dentigerous cyst usually occurs when the distance between the crown and dental sac is more than 2.5 to 3.0 mm.
Following are the diagnostic methods used to detect this cyst.
In this test, the cyst cavity is shown to be filled with water density fluid. Lesions in maxillary region might project into the nasal cavity or paranasal sinuses.
Following are observed in radiography.
This imagery test shows the following:
Histological test shows the following:
Differential diagnosis may be required for further differentiation of this cyst with other lytic lesions of the jaw.
Surgery is required if the cyst is too large or might affect several teeth or tooth buds at a go. Thus, the cyst along with the affected tooth is removed. Marsupialization is usually done before surgery in cases of large cysts. Recurrence of cyst is very rare after removal.
Few complications might occur with these cysts.