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Root resorption most commonly occurs due to inflammation caused by pulp necrosis, trauma, periodontal treatment, orthodontic tooth movement and tooth whitening. [3] Less common causes include pressure from malpositioned ectopic teeth, cysts , and tumors .
Ankylosis of deciduous teeth may rarely occur. The most commonly affected tooth is the mandibular (lower) second deciduous molar. Partial root resorption first occurs and then the tooth fuses to the bone. This prevents normal exfoliation of the deciduous tooth and typically causes impaction of the permanent successor tooth.
A thicker layer of cementum can give the tooth an enlarged appearance, mainly occurring at the apex or apices of the tooth. The cellular cementum functions at the bottom half of the tooth roots which contain cementocytes that anchor the tooth into the jaw socket, protect the tooth's pulp, and repair external root resorption. [2]
Well defined, rounded or triangular radiodensity, that is uniformly opaque. There is no lucent component. Found near the root apex or in the inter-radicular area. Root resorption and tooth movement are rare. If it blends into bone cortices, it does so with no expansion or thinning. [2]
Dental cysts are usually caused due to root infection involving tooth decay. Untreated dental caries then allow bacteria to reach the level of the pulp, causing infection. The bacteria gains access to the periapical region of the tooth through deeper infection of the pulp, traveling through the roots.
Trauma, reactions to foreign bodies, or toxic reactions can also contribute to this non-plaque-induced gingivitis. Furthermore, genetics can play a significant role. Specifically, hereditary gingival fibromatosis is known to cause non-plaque-induced gingival lesions. However, sometimes, there is no specific cause for this form of gingival disease.
Cementoblastoma is slow growing well-defined, radiopaque mass, with a radiolucent peripheral line, that overlies and obliterates the tooth root typically presenting with root resorption. [6] It has a rounded or sunburst appearance. Differential diagnosis include severe hypercementosis, chronic focal sclerosing osteomyelitis, and osteoma. Histologic
Human Tooth Diagram. Cementoma is an odontogenic tumor of cementum.It is usually observed as a benign spherical mass of hard tissue fused to the root of a tooth. [1] It is found most commonly in the mandible in the region of the lower molar teeth, occurring between the ages of 8 and 30 in both sexes with equal frequency . [1]
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