Table 1.

Different classifications of OF.

Histological classifications
Gardner, 1980 [8]	Hyperplastic dental follicle	Simple type fibrous neoplasm with collagenous fibrous connective tissue containing inactive-looking odontogenic epithelium	Complex or WHO-type lesion with dysplastic dentine or tissue like cementum, fibrous tissue with myxoid area and sparse or often conspicuous inactive looking odontogenic epithelium
Lukinmaa PL et al., 1990 [9]; Langlais et al., 1995 [10]		Simple type	Complex or WHO type	Granular cell type
WHO, 2005 [5]		Epithelium-poor type	Epithelium-rich type

Topographical classification
Intra-osseous or central	Extra-osseous or peripheral