Free vascularized thin corticoperiosteal graft

Area of Science:

• Orthopedic Surgery
• Regenerative Medicine
• Bone Tissue Engineering

Background:

• Fracture nonunion presents a significant clinical challenge, often requiring revision surgery.
• Conventional treatments for nonunion have variable success rates.
• Vascularized periosteal grafts are used, but graft vascularity can be a limiting factor.

Observation:

• A new thin corticoperiosteal graft was developed, harvested from the femur's medial condylar and supracondylar regions.
• The graft incorporates periosteum and a thin layer of outer cortical bone (0.5–1.0 mm), preserving the cambium layer.
• This graft is supplied by the articular branch of the descending genicular artery and vein.

Findings:

• The corticoperiosteal graft demonstrated enhanced osteogenic potential due to preserved cambium layer.
• Six patients with recalcitrant upper extremity fracture nonunion were treated with this graft.
• All six patients achieved uneventful bony union within 10 weeks, indicating high efficacy.

Implications:

• This technique offers a promising alternative for treating challenging fracture nonunions.
• The preserved cortical bone may enhance graft integration and healing capacity.
• Further studies could explore the application of this graft in other orthopedic settings.