| http://www.w3.org/ns/prov#value | - f bone, cementum-like tissue, or dystrophic calcification. [2] A combination of the aforementioned products is often found.It is widely considered that this lesion originates from the cells of the periodontal ligament [3],[4],[5],[6] and is often associated with trauma or local irritants, such as subgingival plaque and calculus, dental appliances, and poor-quality dental restorations. [3],[7],[8]
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