Oral fibrous hyperplasia is a benign, localized overgrowth of fibrous connective tissue within the oral mucosa, developing as a reactive response to chronic low-grade mechanical irritation or trauma rather than as a true neoplasm. It ranks among the most common soft-tissue lesions encountered in routine dental practice.
Common Causes
The condition develops when persistent tissue injury provokes an exaggerated but self-limited repair response. Instead of resolving to its original dimensions, the connective tissue proliferates beyond normal boundaries. Frequently identified triggers include:
- Ill-fitting dentures or partial prostheses creating repetitive friction against the mucosa
- Chronic cheek or lip biting along the occlusal line
- Sharp or fractured tooth margins and poorly contoured restorations
- Calculus deposits and chronic gingival inflammation
- Orthodontic appliances or overextended denture flanges
Clinical Presentation
Lesions typically appear as smooth, firm, dome-shaped nodules that closely match the color of the surrounding tissue. They are most often found on the buccal mucosa along the occlusal line, the lower lip, the lateral border of the tongue, and the gingival tissue. Most are asymptomatic unless secondarily traumatized, ranging from a few millimeters to over a centimeter in diameter.
Because the appearance can resemble a fibrous epulis, lipoma, or early mucocele, clinical diagnosis alone is insufficient. A tissue biopsy with histopathological examination is the definitive diagnostic step, typically revealing dense collagen bundles with sparse fibroblasts and minimal vascularity — a pattern clearly distinguishable from conditions such as pyogenic granuloma, which displays a more richly vascular stroma.
Treatment and Management
Conservative surgical excision is the standard of care, and the excised specimen should be submitted for histopathological confirmation to rule out more significant pathology. Recurrence is uncommon but possible if the original irritating stimulus — such as a poorly fitting prosthesis or a sharp tooth margin — is not corrected at the same time. Patients with gingival involvement may also benefit from a thorough periodontal evaluation to address contributing factors, including calculus removal and soft-tissue recontouring.
Eliminating the source of chronic irritation alongside surgical removal is the most reliable strategy for preventing recurrence and ensuring long-term tissue health.