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A cementicle is a small, spherical or ovoid calcified mass embedded within or attached to the cementum layer on the root surface of a tooth, or lying free within the periodontal ligament. They tend to occur in elderly individuals. There are 3 types: * Free cementicle – not attached to cementum * Attached (sessile) cementicle – attached to the cementum surface (also termed exocementosis) * Embedded (interstitial) cementicle – with advancing age the cementum thickens, and the cementicle may become incorporated into the cementum layer

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  • Cementicle (en)
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  • A cementicle is a small, spherical or ovoid calcified mass embedded within or attached to the cementum layer on the root surface of a tooth, or lying free within the periodontal ligament. They tend to occur in elderly individuals. There are 3 types: * Free cementicle – not attached to cementum * Attached (sessile) cementicle – attached to the cementum surface (also termed exocementosis) * Embedded (interstitial) cementicle – with advancing age the cementum thickens, and the cementicle may become incorporated into the cementum layer (en)
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  • Cementicle (en)
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  • Cementicle (en)
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  • A cementicle is a small, spherical or ovoid calcified mass embedded within or attached to the cementum layer on the root surface of a tooth, or lying free within the periodontal ligament. They tend to occur in elderly individuals. There are 3 types: * Free cementicle – not attached to cementum * Attached (sessile) cementicle – attached to the cementum surface (also termed exocementosis) * Embedded (interstitial) cementicle – with advancing age the cementum thickens, and the cementicle may become incorporated into the cementum layer They may be visible on a radiograph (x-ray). They may appear singly or in groups, and are most commonly found at the tip of the root. Their size is variable, but generally they are small (about 0.2 mm – 0.3 mm in diameter). Cementicles are usually acellular, and may contain either fibrillar or afibrillar cementum, or a mixture of both. Cementicles are the result of dystrophic calcification, but the reason why this takes place is unclear. Cementicles are thought to form when calcification occurs around a nidus, a precipitating center. Around this nidus they slowly enlarge by further deposition of calcium salts. Examples of how cementicles are thought to form include: * Calcification due to degenerative changes in the epithelial cell rests of Malassez * Calcification of thrombosed (blocked) capillaries in the periodontal ligament (i.e. a phlebolith) * Microtrauma to Sharpey's fibres causes small spicules of cementum or alveolar bone to splinter into the periodontal membrane Some do not consider these as true cementicles. (en)
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