Oral Submucous Fibrosis (OSMF)

Oral Submucous Fibrosis (OSMF) is a chronic, progressive disease affecting the oral mucosa, marked by excessive collagen deposition in submucosal tissues. This leads to stiffness, scarring, and reduced mouth opening (trismus), impacting chewing, swallowing, and speech. It carries a high risk of malignant transformation into oral cancer, with rates of 1.5-15%.?

Causes

Primary cause is areca nut (betel quid) chewing, common in South Asia, where alkaloids like arecoline trigger fibroblast hyperactivity and collagen buildup. Genetic susceptibility, nutritional deficiencies (iron, vitamins), and irritants like tobacco or spicy foods exacerbate it. Vascular changes, including reduced blood vessels, contribute to hypoxia and fibrosis progression.?

Symptoms

Early signs include burning mouth sensation on spicy food intake, recurrent ulcers, and blanching of mucosa. Advanced stages show palpable fibrous bands in cheeks/buccal mucosa, xerostomia, dysphagia, and severe trismus (mouth opening <20mm). Patients often develop speech difficulties and facial asymmetry.?

Diagnosis and Staging

Diagnosis involves clinical exam for fibrosis and biopsy confirming juxta-epithelial inflammation and hyalinized collagen. Staging (e.g., functional) assesses mouth opening: Stage I (minimal), II (moderate), III (severe with <10mm).?

Treatment Options

Cessation of areca nut is essential; conservative treatments include intralesional steroids, hyaluronidase, or antioxidants to reduce fibrosis. Advanced cases require surgery like fibrotomy with grafts or laser therapy. Physiotherapy aids mouth opening; regular biopsies monitor malignancy risk. Multidisciplinary care improves outcomes.