Cementum caries o Occurs after gingival recession or periodontal surgery, when the root surface is exposed to the oral environment o Prevalence increase in recent year o Cementum caries occurs initially under dental plaque ● Histopathology Department of Oral Pathology, Shandong University http://1.51.214.13Department of Oral Pathology, Shandong University 2 http://1.51.214.13  Occurs after gingival recession or periodontal surgery, when the root surface is exposed to the oral environment  Prevalence increase in recent year  Cementum caries occurs initially under dental plaque  Histopathology