21: Atlas of diseases and abnormalities affecting the jaws

Atlas of diseases and abnormalities affecting the jaws

Dental care professionals should be aware of the more common diseases and important abnormalities that can affect the jaws. Detailed interpretative skills are not required, more the ability to recognize the abnormal. This chapter is therefore designed like an atlas to show examples of some of the conditions that have characteristic radiographic features. The lesions shown can be broadly grouped into:

• Developmental abnormalities

• Tumours – odontogenic and non-odontogenic

• Fibro-osseous lesions

Fig. 21.1 Panoramic radiograph showing hypodontia are congenitally missing and is rudimentary and peg-shaped.

Fig. 21.2 Periapical showing a supernumerary or mesiodens (arrowed) between .

Fig. 21.3 Periapical showing a complex odontome, a disorganized mass of dental tissues in region (arrowed).

Fig. 21.4 Oblique lateral showing two supplemental lower premolars (arrowed) and a developing .

Fig. 21.5 Periapical showing a compound odontome in the anterior maxilla – several small discrete denticles are evident (arrowed) (right).

Fig. 21.6 Periapical showing a dens-in-dente or invaginated odontome involving . (open arrows). There is an associated periapical area of infection (solid arrows) – a common occurrence with dens-in-dente.

Fig. 21.7 Lateral view showing a dilacerated . The crown (open arrow) and the root (solid arrows) are in different planes as a result of the near right angle bend in the root.

Fig. 21.8 True cephalometric lateral skull showing macrognathia (overgrowth of the mandible) in skeletal Class III. The soft tissue profile has been drawn in.

Fig. 21.9 True cephalometric lateral skull showing micrognathia (underdeveloped mandible) in skeletal Class II. The soft tissue profile has been drawn in.

Fig. 21.10 Horizontally impacted . Note the pincer-shaped roots and their indentation of the upper margin of the inferior dental canal (open white arrows) and radiolucency beneath the crown (solid black arrows) caused by the follicle. In addition, note the caries in (open black arrows).

Fig. 21.11 Transversely positioned . The crown is viewed end-on. Note that the bucco/lingual obliquity of the tooth cannot be determined from this radiograph.

Fig. 21.12

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Tags: Radiography and Radiology for Dental Care Professionals 3e

Jan 12, 2015 | Posted by mrzezo in Oral and Maxillofacial Radiology | Comments Off

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