It can be confused with the peripheral ossifying fibroma.

Not to be confused with ossifying fibroma.

Additionally, highly developed bone or cementum is more likely to be present when the peripheral ossifying fibroma has existed for a longer period of time.

Over time, bone may form within the lesion at which point the term peripheral ossifying fibroma may be used (in some parts of the world).

This tumor is far less common than conventional ossifying fibroma, and is considered a rare tumor.

Active ossifying fibroma must be separated from fibrous dysplasia, cementoblastoma, and meningioma.

Instead, the three are associated with each other because they appear frequently on gingiva: pyogenic granuloma and peripheral ossifying fibroma.

The lesion is considered part of an ossifying fibroma, but that is usually considered to be a gnathic tumor.

Central ossifying fibroma is a benign neoplasm that may arise from the fibroblasts of the periodontal ligaments.

Osteofibrous dysplasia (also known as ossifying fibroma) is a rare, benign non-neoplastic condition with no known cause.

In contrast to the peripheral ossifying fibroma, the peripheral odontogenic fibroma is a rare lesion.

Peripheral ossifying fibroma is an oral pathologic condition that appears in the mouth as an overgrowth of gingival tissue due to irritation or trauma.

A juvenile active ossifying fibroma is a benign fibro-osseous neoplasm composed of mixture of stroma and bone characterized by rapid and destructive growth.

The term peripheral ossifying fibroma has been criticized as this lesion is not related to the ossifying fibroma of bone and is not a fibroma.

This tumor has gone by several names in the past, but active ossifying fibroma is similar to juvenile active ossifying fibroma, except it does not develop in young patients.

Other fibromas: chondromyxoid fibroma, desmoplasmic fibroma, nonossifying fibroma, ossifying fibroma, nuchal fibroma, collagenous fibroma, fibroma of tendon sheath, perifollicular fibroma, pleomorphic fibroma, uterine fibroma, etc.

Epulis is also sometimes used synonymously with epulis fissuratum, however other conditions are classified as epulides, e.g. giant cell epulis (peripheral giant cell granuloma), ossifying fibroid epulis (peripheral ossifying fibroma), and congenital epulis.