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The annual incidence rates per million for ameloblastomas are 1.96, 1.20, 0.18 and 0.44 for black males, black females, white males and white females respectively. [29] Ameloblastomas account for about one percent of all oral tumors [ 17 ] and about 18% of odontogenic tumors. [ 30 ]
The recurrence rate is 10-15%. [5] Franklin and Pindborg reported a recurrence rate of 14%. [6] It is considered to have a recurrence rate much lower than that of ameloblastoma. Malignant metastasis has been reported. [1]
The following rates describe the number of new cases (for incidence rates) or deaths (for mortality rates) per 100 000 individuals per year. [78] The incidence rate of oral cancer is 2.6 for both sexes. The rate is higher in males at 3.3 and lower in females at 2.0. [78] The mortality rate is lower than the incidence rate at 1.6 for both sexes.
Ameloblastic fibromas contain both of these tissues, and its name is derived from them. It is a neoplasm, meaning it is a mass of abnormal growth of cells or tissue. If the mass contains hard dental tissues they are known as odontoma, which are not true neoplasm, but classified as hamartomatous lesions. [1]
Calcifying odontogenic cyst (COC) is a rare developmental lesion that comes from odontogenic epithelium. [2] It is also known as a calcifying cystic odontogenic tumor, which is a proliferation of odontogenic epithelium and scattered nest of ghost cells and calcifications that may form the lining of a cyst, or present as a solid mass.
Cementoblastoma, or benign cementoblastoma, is a relatively rare benign neoplasm of the cementum of the teeth. It is derived from ectomesenchyme of odontogenic origin, with the formation of cementum-like tissue around the associated tooth root. [2] Cementoblastomas represent less than 0.69–8% of all odontogenic tumors. [2]
Though it is generally regarded as benign, there have been cases of its malignant transformation into ameloblastic fibrosarcoma [5] and odontogenic sarcoma. [6] Cahn LR and Blum T, believed in "maturation theory", which suggested that AFO was an intermediate stage and eventually developed during the period of tooth formation to a complex ...
The growth pattern of the lesion is very characteristic from which a diagnosis can be made as there is growth and spread both forward and backward along the medullary cavity with little expansion. No resorption of teeth or inferior dental canal and minimal displacement of teeth is seen.