Cemento-ossifying fibroma (COF) is a benign neoplasm characterized by replacement of normal bone by fibrous tissue and varying amounts of newly formed bone or cementum-like material, or both. 1 Peripheral Cemento ossifying fibroma (PCOF) is a reactive lesion which has been described with various synonyms and is believed to arise from the periodontal ligament. 2 It predominantly affects adolescents and young adults, with peak prevalence between 10 and 19 yrs. There is a definite female predilection and almost 60% of the lesions occur in the maxilla. Trauma or local irritation such as dental calculus, ill-fitting denture appliances and faulty restorations are known to precipitate the development of this lesion. 3 The present report describes a case of Peripheral Cemento ossifying fibroma (PCOF) in a 60 year old female with a mass on anterior labial and palatal gingival region.
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