Oral Mucosal Wound Healing Mechanisms

Oral mucosal wounds heal rapidly and with minimal scarring compared with skin, owing to unique cellular, molecular and environmental factors. The process proceeds through the classic stages of haemostasis, inflammation, proliferation and remodelling yet exhibits distinct kinetics and outcomes. Within hours of injury, a robust but controlled clot forms and inflammatory cells arrive, clearing debris while limiting collateral tissue damage. Oral epithelial cells and resident keratinocytes proliferate and migrate to restore barrier integrity, aided by saliva-borne growth factors and antimicrobial peptides. Underlying fibroblasts adopt a pro-remodelling phenotype, secreting and organising extracellular matrix components such as collagen and hyaluronan in a manner that resists fibrosis. Angiogenesis is enhanced by local secretion of vascular endothelial growth factor and hepatocyte growth factor, ensuring rapid revascularisation. The mucosal environment, rich in saliva and commensal microbes, modulates inflammatory responses and promotes epithelial restitution. Together, these interlinked mechanisms confer global clinical advantages, from reduced post-operative scarring to improved outcomes in periodontal and reconstructive surgery. Understanding these processes has practical implications for biomaterial design, cell-based therapies and the optimisation of regenerative strategies in both oral and cutaneous contexts.

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Oral Mucosal Wound Healing Mechanisms publication trend

The graph below shows the total number of articles in oral mucosal wound healing mechanisms across all publications each year (not limited to Nature Index journals).

Technical terms

Keratinocytes: The primary epithelial cells of the mucosa, responsible for re-epithelialisation after injury.

Fibroblasts: Connective tissue cells that synthesise and reorganise extracellular matrix during wound remodelling.

Extracellular matrix (ECM): A network of proteins and glycosaminoglycans that provides structural support and biochemical cues for tissue repair.

Re-epithelialisation: The migration and proliferation of epithelial cells to restore mucosal continuity.

Angiogenesis: Formation of new blood vessels from existing vasculature, essential for nutrient delivery and waste removal in healing tissue.

Myofibroblasts: Specialized fibroblasts with contractile properties that drive wound contraction and matrix deposition.

References

1. The Bigger Picture: Why Oral Mucosa Heals Better Than Skin. Biomolecules (2021).
2. Human Gingival Fibroblasts Display a Non-Fibrotic Phenotype Distinct from Skin Fibroblasts in Three-Dimensional Cultures. PLOS ONE (2014).
3. Hepatocyte Growth Factor Mediates Enhanced Wound Healing Responses and Resistance to Transforming Growth Factor-β1-Driven Myofibroblast Differentiation in Oral Mucosal Fibroblasts. International Journal of Molecular Sciences (2017).
4. Human gingival fibroblast secretome accelerates wound healing through anti-inflammatory and pro-angiogenic mechanisms. npj Regenerative Medicine (2020).
5. Use of a pre-vascularised oral mucosal cell sheet for promoting cutaneous burn wound healing. Theranostics (2018).