ameloblastic odontoma


Also found in: Dictionary, Encyclopedia, Wikipedia.

odontoma

 [o″don-to´mah]
any odontogenic tumor, especially a composite odontoma.
ameloblastic odontoma a rare, slow-growing, mixed tumor of odontogenic origin that combines the characteristics of composite odontoma and ameloblastoma.
composite odontoma one consisting of both enamel and dentin in an abnormal pattern.
radicular odontoma one associated with a tooth root, or formed when the root was developing.

am·e·lo·blas·tic o·don·to·ma

a benign mixed odontogenic tumor composed of an undifferentiated component histologically identical to an ameloblastoma and a well-differentiated component identical to an odontoma; appears as a mixed radiolucent-radiopaque lesion and presents clinically as an ameloblastoma.
Synonym(s): odontoameloblastoma

ameloblastic odontoma,

a malignant tumor of the jaw that forms cementum, dentin, enamel, and pulp tissue. See also composite odontoma.

ameloblastic fibroma

A benign, usually solid, rarely cystic tumour primarily of children and adolescents, composed of strands and buds of ameloblastoma-like epithelial cells in a dense, cell-free connective tissue stroma. Mitoses are rare. Multiple sections are needed to exclude dentine which, if present, would designate the lesion ameloblastic fibro-dentinoma.

am·e·lo·blas·tic o·don·to·ma

(am'ěl'ō-blas'tik ō'don-tō'mă)
A benign mixed odontogenic tumor composed of an undifferentiated component histologically identical to an ameloblastoma and a well-differentiated component identical to an odontoma.

ameloblastic odontoma

A tumour of tooth-forming tissue. Also known as odontoblastoma.

am·e·lo·blas·tic o·don·to·ma

(am'ěl'ō-blas'tik ō'don-tō'mă)
Benign mixed odontogenic tumor composed of an undifferentiated component histologically identical to an ameloblastoma and a well-differentiated component identical to an odontoma; appears as a mixed radiolucent-radiopaque lesion and presents clinically as an ameloblastoma.
Synonym(s): odontoameloblastoma.

ameloblastic

pertaining to the formation of dental enamel.

ameloblastic fibro-odontoma
see ameloblastic odontoma (below).
ameloblastic layer
the inner layer of cells of the enamel organ, which forms the enamel prisms of the teeth.
ameloblastic odontoma
resembles ameloblastic fibroma but the tumor contains enamel and dentine rather than only enamel.

odontoma

a non-neoplastic malformation, a hamartoma, consisting of a mixture of enamel, dentine and cementum.

ameloblastic odontoma
contains true neoplastic ameloblastic tissue. See ameloblastic odontoma.
complex odontoma
all the dental tissues are represented but not in an organized form.
composite odontoma
one consisting of both enamel and dentine in an abnormal pattern.
compound odontoma
all the dental tissues are present and organized into denticles, tooth-like structures.
radicular odontoma
one associated with a tooth root, or formed when the root was developing.
temporal odontoma
most commonly in the mastoid process of the petrous temporal bone manifested as a discharging sinus at the base of the ear. Is a dentigerous cyst.