-Ameloblastoma

• Radiolucent, multilocular or unilocular, may be associated with an impacted tooth.

-Malignant ameloblastoma & ameloblastic carcinoma

-Adenomatoid odontogenic tumor

• May be radiolucency mimicking a dentigerous cyst, but often has calcifications

-Calcifying epithelial odontogenic tumor

•  Unilocular or multilocular radiolucency with or without calcificed structures

-Squamous odontogenic tumor

•  Triangular radiolucent defect lateral to the root of teeth.

-Clear cell odontogenic tumor

• Unilocular or multilocular radiolucency with somewhat ill-defined borders.

Ameloblastic fibroma

• Well-defined unilocular or multilocular radiolucency; 1/2 associated with impacted tooth.

Ameloblastic fibro-odontoma

• ill-defined destructive radiolucent lesion.

Ameloblastic fibrosarcoma

• well-circumscribed unilocular (rarely multilocular) radiolucency with variable calcifications.

Odontoameloblastoma

• Destructive radiolucency w/ radiopaque features of an odontoma.

Odontoma

• Compound Type - radiographic features are usually diagnostic and consists of a clump of "toothlets."
  
  
• Complex Type - Presents as a radiopaque mass with a narrow radiolucent rim.

-Odontogenic fibroma

•  Unilocular or multilocular radiolucency, root resorption is common.
• The odontogenicfibroma usually appears as a well-defined, unilocularradiolucency.  It is often associated with the apical area of an erupted tooth.
  Larger lesions are often multilocular.
  Many odontogenicfibromas have sclerotic borders.
  Root resorption is common.

-Granular cell odontogenic fibroma

Typically appears as a well-demarcated radiolucency which may have some areas of opacity.

-Peripheral odontogenic fibroma

The lesion does not involve the underlying bone but areas of calcification may be seen in the soft tissues in some cases.

-Myxoma

• Multilocular (tennis racquet) or unilocular radiolucency (often w/ scalloped border).

-Cementoblastoma

• Well circumscribed calcified mass w/ peripheral lucent line and resorption of associated roots.
• Radiographically, the lesion appears as an opaque lesion attached to and replacing the root of the involved tooth. Opaque spicules radiate from the central mass.

List teeth most commonly affected in the following:

(1)  Turner's Hypoplasia

(2)  Molar Incisor Hypominerlization

(3)  Dental Fluorosis

(4)  Syphilitic Hypoplasia

(5)  Abfraction

(1)  Succedaneous teeth - most commonly bicuspids

(2)  1-4 permanent molars.  buccal or occlusal surfaces of molars or incisors.

(3)  Inciscors. 

(4)  Incisors - "screwdriver".  Molars - "mulberries"

(5)  Facial surfaces of bicuspids and molars.

List teeth most commonly affected in the following:

(1)  External resorption

(2)  Primary impaction

(3)  Ankylosis

(4)  Ludwig's Angina

(5)  Cavernous Sinus Thrombosis

(1)  apical or midportions of root.

(2)  3rd molars, then Mx canines

(3)  Deciduous Mn molars

(4)  Mn molars

(5)  Mx teeth