Overview of Skin Grafting and Skin Substitute Therapies for Wound Healing

Conclusions

• Skin grafting and skin substitutes are best used as adjuncts when standard wound care is failing or when wounds are large and slow to heal.
• Traditional autografting can be effective, but its need for surgery, anesthesia, donor-site injury, and recurrence makes it an imperfect long-term solution for many chronic wounds.
• Skin grafts and many skin substitutes appear to work not only by replacing tissue but also by stimulating a previously non-healing wound to restart repair.
• The biologic effect of many skin substitutes is transient, suggesting their value lies in early signaling that shifts chronic wounds toward an acute-healing state rather than permanent engraftment.
• Several off-the-shelf cellular, acellular, and placental products have randomized trial evidence showing improved healing in diabetic foot ulcers and venous leg ulcers.
• Although many products exist, only a minority have high-quality evidence, so product choice should be guided by studied indications rather than marketing claims.
• Different advanced wound therapies can work through multiple redundant healing pathways, implying that fixing a few critical failures may be enough to convert a chronic wound into a healing one.
• In chronic wounds, effective advanced therapy can improve tissue biology by restoring healthier keratinocyte and fibroblast activity, better matrix signaling, and less fibrosis.
• Novel lower-morbidity techniques such as pinch grafts, minced grafts, spray-on cells, and fractional harvesting can speed healing while reducing donor-site burden.
• Newer approaches that expand a small amount of skin or even use adipose tissue can treat larger wounds with less donor tissue and may improve outcomes.
• The overall conclusion is that both conventional grafting and engineered skin substitutes are useful tools, and combining them thoughtfully can improve healing now and in future wound care.