Etiology : Fibromas are not considered true neoplasms, but rather reactive responses to chronic trauma or irritation. One specific form of this condition is called (sometimes called epulis induced fibrous hyperplasia fissuratum) and results from wearing an ill-fitting denture Method of Transmission: Not applicable Fibromas are the most common tumors Epidemiology: found in the oral cavity. The peak incidence of this lesion occurs in the fourth to sixth decades, and it is seen more frefibrous Denture-induced quently in females than in males. hyperplasia is seen more often in the older population, since this condition only occurs in patients who wear dentures. older patients in nursing homes are particularly vulnerable, since dental care is not always provided in these facilities