53 Jaw bone conditions: Radiolucencies and radiopacities

53 Jaw bone conditions: Radiolucencies and radiopacities

Figure 53.1a Radiolucent lesions.

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Figure 53.1b Nonodontogenic radiolucent cystic lesions.

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Figure 53.2 Nasopalatine duct cyst.

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Figure 53.3 Hyperparathyroidism. Brown tumor.

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Figure 53.4a Radiopaque lesions.

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Figure 53.4b Radiolucent lesions. CEOT, calcifying epithelial odontogenic tumor; KCOT, keratocystic odontogenic tumor; AOT, adenomatoid odontogenic tumor.

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Figure 53.5 Osteosclerosis.

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Figure 53.6a Osteoma.

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Figure 53.6b CT Osteoma.

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Figure 53.7 Osteosarcoma.

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Figure 53.8 Ameloblastic fibro-odontoma.

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Many diseases of or in the jaws present asymptomatically as radiolucencies, radiopacities or with mixed appearances on imaging. Other presentations are as swellings, pain or sometimes fracture or disturbance of tooth eruption (displaced, missing or loose teeth). Swellings that appear to originate from the jaws may arise from subcutaneous tissues or bones: the mnemonic MINT aids diagnosis:

Malformations, e.g. tori and fibro-osseous lesions

Inflammatory conditions, e.g. odontogenic infections, osteomyelitis, actinomycosis, tuberculosis, or syphilis

Neoplasms and cysts (see below)

Trauma causing subperiosteal hematomas

Investigations largely involve imaging, and serum calcium, phosphate, and alkaline phosphatase levels, but histopathology is almost invariably required (Tables 53.1 and 53.2).

Radiolucencies

Radiographic features to be assessed include the lesional size, shape, number, margins, character (radiolucency and/or radiopacity), and effects (displacement of the inferior alveolar nerve or tooth displacement or resorption).

Well-defined radiolucencies are often odontogenic cysts and benign tumors.

Poorly defined radiolucencies are often infections or tumors.

Jaw radiolucencies may include (Figures 53.1a and b):

  • Odontogenic diseases, inflammation, cyst/>
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Jan 12, 2015 | Posted by in Oral and Maxillofacial Pathology | Comments Off on 53 Jaw bone conditions: Radiolucencies and radiopacities
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