Features of focal sclerosing osteomyelitis often include:
Correct Answer: A history of recent restoration of the tooth in question.
Description: A history of recent restoration of the tooth in question. Focal sclerosing osteomyelitis (FSO) consists of a localized, usually uniform zone of increased radiopacity adjacent to the apex of a tooth that exhibits a thickened periodontal ligament space or an apical inflammatory lesion. The size of the lesions usually measure less than 1 cm in diameter. There is no radiolucent halo surrounding this type of lesion. The osteitis microscopically appears as a mass of dense sclerotic bone. FSO is most often found in patients younger than 20 years of age, around the apices of mandibular teeth (most commonly molars) with large carious lesions and chronically inflamed pulps or with recent restorations. Most sources agree that the associated tooth may or may not be vital. Gender is not a predisposing factor. FSO can be asymptomatic or the patient can experience mild pain, depending on the cause. FSO is usually discovered upon radiographic analysis. It represents a chronic, low-grade inflammation.
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