Aetiology • Ageing.
• Chronic apical periodontitis (adjacent to resorption).
• Buried teeth, Pagct's disease.
Pathology Usually lamellar—sequential deposition of layers of cementum forming smooth thickcning of root. Rarely (Pagct's disease or ccmcntoblastoma), there is an irregular jigsaw-puzzle ('mosaic') pattern of intermittent deposition and resorption (Fig. 28).
fig 28 Hypercementosis: lamellar and irregular.
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