54 Jaw bone conditions: Odontogenic diseases and cysts

Figure 54.1 Odontogenic cysts.

Figure 54.2a Apical cyst and granuloma.

Figure 54.2b Radicular cyst.

Figure 54.3 Dentigerous cyst.

Figure 54.4 Dentigerous cyst squamous epithelium 20 x.

Table 54.1 Main odontogenic cysts.

Box 54.1 Jaw cysts.

Odontogenic diseases may be related to the tooth or its germ.

Odontogenic infections

Caries, periodontitis or pericoronitis are the common oral pyogenic infections. Depending on bacterial load and host immunity, dental pulpal infection may lead to apical periodontitis, abscess, and fascial space infection, or granuloma or periapical (radicular) cyst.

Odontogenic cysts

Odontogenic cysts (and tumors) arise from odontogenic ectoderm, mesenchyme or a combination (ectomesenchyme) and they may be at the site of a tooth germ, or associated with a tooth. There is a male predominance and the mandible is affected three times as commonly as the maxilla.

Clinical features: Often asymptomatic, cysts are usually an incidental finding on imaging, are generally benign, slow-growing and may/>

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