Swelling seen in the posterior mandible

Radiopaque areas surrounded by a radiolucent rim

Complex odontome

1 -well defined radiolucency with impacted canine.

2 -composed of spindle epithelial cells that form whorled masses, and duct like structure.

3 -AOT ( adenomatoid odontogenic tumor)

Multilocular radiopacity due to large number of denticles ( looks like a bag of teeth )

Multiple teeth structure

c. Diagnosis.Compound odontome

1 -multilocular radiolucency with well-defined radiopaque margin.

2 -loose C.T with strands or nests of odontogenic epithelium.

3 -Ameloblastic fibroma

a. Composed of loose C.T containing little collagen and large amounts of an intercellular substance, so it looks like dental pulp.

b. Odontogenic myxoma

Benign cementoblastoma

Active cementoblasts surrounding cement trabeculae

Clinical : unilateral swelling of the jaw

X-ray : radiopacity in lower anterior of the jaw showing giantly form cementoma

Lined by pseudostratified squamous epithelium ,the wall contains lymphoid tissue

Dilaceration

Enamel pearl

Shell teeth