The condition involved with an unerupted tooth or impacted tooth is:

 # The condition involved with an unerupted tooth or impacted tooth is:
A. Dentigerous cyst
B. Mural ameloblastoma
C. Adenomatoid odontogenic tumor
D. All of the above

The correct answer is D. All of the above.

Dentigerous cyst is always associated initially with the crown of an impacted, embedded or unerupted tooth. A dentigerous cyst may also be found enclosing a complex compound odontoma or involving a supernumerary tooth. The most common sites of this cyst are the mandibular and maxillary third molar and maxillary cuspid areas.

Adenomatoid Odontogenic Tumors are seen in a rather narrow age range, between 5 and 30 years, with most cases appearing in the second decade. Females are more commonly affected than males. Lesions often appear in the anterior portion of the jaws, more often in the anterior maxilla, generally in association with the crowns of impacted teeth. 


  1. hi, could you explain how mural ameloblastoma is also associated with all the given options

    1. It is of great clinical significance that numerous cases of ameloblastoma have been reported developing in the wall of dentigerous cysts from the lining epithelium or associated epithelial rests. Stanley and Diehl have reviewed a series of 641 cases of ameloblastoma and have found that at least 108 cases of this neoplasm, approximately 17%, were definitely associated with an impacted tooth and/or a follicular or dentigerous cyst. The disposition for neoplastic epithelial proliferation in the form of an ameloblastoma is far more pronounced in the dentigerous cyst than in the other odontogenic cysts. The formation of such a tumor manifests itself as a nodular thickening in the cyst wall, the mural ameloblastoma, but this is seldom obvious clinically.


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