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Focal sclerosing osteomyelitis (condensing osteitis) represents a localized sclerotic response of bone to a persistent, low-grade chronic pulpal or periapical infection; it is typically asymptomatic and occurs at the apex of an involved tooth, rather than being caused by periosteal overgrowth or surgical sequelae [Holly, 2009, 20120441; Jones, 1990, 2341449].