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Unusual external resorption of a maxillary lateral.

This article defines an unusual previously unreported entity afflicting a maxillary lateral incisor. Labial idiopathic external root resorption just apical to the cemento-enamel presented as a gingival (periodontal) problem and was misinterpreted as cervical dental caries. This report defines a new possibility for a radicular defect in a maxillary lateral incisor that may cause periodontal problems.