Maxilla The Molar Area example essay topic
374 words
Ameloblastoma is a benign odontogenic tumor that has been known for many years. A detailed description of it was given by Falk son and its early history has been discussed by Baden. Credit for the first histopathological description is given to Wedl (1853) although his book was not published till 1870. Wedl suggested that the tumor could have arisen from a tooth bud or dental lamina. He called it "cystosarcoma or cystosarcoma adenoids". Mallas ez has been given credit for the introduction of the term admen tine epithelioma.
The first people to encourage the adoption of the term "ameloblastoma" were Ivy and Churchill. Ameloblastoma is usually recognized early due to its persistent local growth in the maxillofacial area and its ability to produce marked deformity before leading to serious debilitation. This neoplasm originates within the mandible or maxilla from epithelium that is involved in the formation of teeth. Potential epithelial sources include enamel organ, odontogenic rests, reduced enamel epithelium, and the epithelial lining of odontogenic cysts especially the dentigerous cyst.
The stimulus for neoplastic transformation of these epithelial structures remains unknown. Ameloblastoma rarely affects children. It is a lesion of adults, and occurs predominantly in the fourth and fifth decades of life. Worldwide, the median age was found to be 35 years with a range of 4-92 years. Males accounted for 53% of cases and females 47%. The rare lesions occurring in children are typically uni cystic and appear clinically as odontogenic cysts.
Ameloblastoma may occur anywhere in the mandible or maxilla the most favored site being the mandibular molar-ram us area. In the maxilla the molar area is affected more commonly than the premolar or anterior regions. Ameloblastoma are usually asymptomatic and are discovered either during routine radiographic examination or because of asymptomatic jaw expansion. Occasional tooth movement or malocclusion maybe the initial presenting sign.
Rarely extra osseous peripheral ameloblastoma are found in the gingiva. These are seen in the older adults. They may arise from overlying epithelium or rests of serres and exhibit a benign, non aggressive course. These do not generally invade underlying bone and they recur infrequently.
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