A = Progressive gingival recession, revealing a larger part of the brownish "ring-like" structure around the cervical area of the involved tooth, which appears to be slightly extruded.
B = Periapical radiograph showing a cylindrical structure appearing as radiopacity of mild intensity surrounding the tooth cervix and extending approximately 2 mm apically.
A cup-like resorption of the alveolar bone, limited to the area of the left first primary central incisor, is also seen, in the absence of any abnormalities within the pulp chamber or the periapical area of the tooth.