[To incise the dentigerous cyst on the floor of nasal cavity (affiliated 2 cases)].

OBJECTIVE

To report 2 cases of the rare disease-the dentigerous cyst on the floor of nasal cavity and explore etiology, the method of diagnosis and treatment.

METHOD: To review the literature briefly and discuss the lesions' pathology, diagnosis and surgical approach.

RESULT: One case originated from the supernumerary teeth on the floor of left nasal cavity, and the other left reversed lateral incisor. Both had the medical history of upper lip and para-nose swelling. CT scan or X-ray showed radiopaque mass, surrounded by a radiolucent cyst like lesion. Both were incisied by nasal endoscope.

CONCLUSION

The dentigerous cyst may originate from impacted or supernumerary teeth. It's diagnosed by clinical feature, X-ray or CT scan. It is a selective and suitable surgical approach to incise the dentigerous cyst by nasal endoscope.