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Bone Grafting for Non-Union OF Large Bones
Bone Grafting for Non-Union of Large Bones is an orthopaedic surgical procedure that stimulates fracture healing in a bone that has failed to unite despite previous treatment — using autologous bone graft, synthetic substitutes, and biological stimulants alongside rigid fixation to achieve definitive union and restore full function.
Overview
Bone non-union occurs when a fracture fails to heal within the expected timeframe — typically 6 to 9 months — due to inadequate immobilisation, poor bone quality, biological failure, infection, or surgical complications. Bone grafting for non-union combines biological stimulation using autologous bone graft harvested from the iliac crest (which is rich in osteogenic cells, growth factors, and structural scaffold) with rigid mechanical fixation using plates, intramedullary nails, or external fixators to provide the stability and biological environment necessary for bone healing to occur. This procedure is the most effective treatment for established non-union of large bones such as the femur, tibia, humerus, and radius.
Types of Bone Grafting for Non-Union
Several bone grafting strategies and fixation approaches are available, and the optimal choice depends on the site of non-union, the quality of existing fixation, and the biological environment at the non-union site.
- Autologous Iliac Crest Bone Graft with Plate Fixation (gold standard for most large bone non-unions)
- Intramedullary Nail Exchange with Bone Grafting (for femoral or tibial shaft non-union)
- Vascularised Fibula Free Flap (for large bone defects or avascular non-union)
- Synthetic Bone Substitute with BMP-2 (recombinant growth factor — for selected cases)
- Bone Marrow Aspirate Concentrate (BMAC) Augmentation (minimally invasive biological stimulation)
Risk Factors for Fracture Non-Union
Several factors increase the risk of fracture non-union and must be assessed and addressed alongside surgical treatment to maximise the chances of successful healing.
- Smoking causing profound impairment of bone healing vascularity and cellular biology
- Diabetes mellitus impairing bone healing biology and microvascular supply
- Osteoporosis and poor bone mineral density reducing bone repair potential
- Inadequate immobilisation or premature weight-bearing after the original fracture
- Infection at the fracture site causing biological failure of healing
- Avascular necrosis of the fracture ends from disrupted blood supply
Non-Union Symptoms
The symptoms of fracture non-union are debilitating and significantly impact function, employment, and quality of life. Recognising these prompts timely specialist orthopaedic assessment.
- Persistent pain at the fracture site long beyond the expected healing time
- Abnormal movement or instability at the fracture site
- Progressive deformity or angulation at the fracture site
- Inability to bear weight or use the affected limb due to pain and instability
- Swelling, warmth, and tenderness persisting at the fracture site
- Failed previous surgical attempts to achieve healing
- Discharging wound or sinus tract over the fracture site suggesting infected non-union
- X-ray or CT evidence of fracture gap, sclerotic bone ends, or absence of callus formation
Key Benefits
Discover the advantages of choosing our bone grafting for non-union of large bones services.
Addresses both the biological failure and the mechanical instability causing non-union simultaneously
Autologous bone graft provides your own bone-forming cells — the most effective biological stimulus
Complete smoking cessation after surgery dramatically improves bone healing success rates
Rigid fixation provides the mechanical environment that allows bone cells to bridge the gap
Offers a realistic chance of definitive union where repeated conservative management has failed
Clinical Features
The technology, techniques and clinical approach behind our bone grafting for non-union of large bones.
Fresh bleeding bone exposed at the non-union site to biologically activate the healing response
Autologous iliac crest graft provides the gold standard combination of osteogenic cells and scaffold
Infected non-union excluded by tissue culture before definitive grafting is performed
Rigid mechanical fixation applied simultaneously to provide the stability bone healing requires
Both the non-union site and graft donor site prepared simultaneously in a single anaesthetic
Preparation Instructions
- Complete standing X-rays and CT scan of the non-union site to assess bone quality, alignment, and deformity
- Check inflammatory markers (CRP, ESR) and consider bone biopsy to rule out infected non-union before surgery
- Provide blood tests including CBC, coagulation, blood group and crossmatch, and metabolic bone tests including vitamin D and calcium
- Stop smoking completely before surgery — smoking dramatically impairs bone healing and significantly increases non-union recurrence
- Optimise diabetes and nutritional status (vitamin D, protein intake) before the procedure
- Stop anticoagulants under supervision 5 to 7 days before surgery
- Fast for 8 to 10 hours before surgery
- Arrange home support and non-weight-bearing aids for 6 to 12 weeks post-discharge as indicated by your surgeon
The Procedure
Step-by-step guide to what you can expect during your bone grafting for non-union of large bones procedure.
Non-Union Diagnosis and Cause Identification
Your orthopaedic surgeon reviews serial X-rays, CT scan of the non-union, inflammatory markers, and all relevant patient factors — particularly smoking, diabetes, nutrition, and infection — to confirm established non-union, identify its type (atrophic, hypertrophic, or infected), and design the most appropriate combined biological and mechanical treatment strategy.
Infection Exclusion Before Definitive Surgery
If infected non-union is suspected, tissue samples are taken before definitive surgery for microbiological and histological analysis. Proceeding with bone graft into an infected non-union without prior treatment dramatically reduces the chance of success. Your surgeon and infectious disease specialist will ensure the infection is fully controlled before grafting.
General Anaesthesia and Surgical Approach
General anaesthesia is administered and both the non-union site and the iliac crest bone graft donor site are prepared in a sterile manner simultaneously, allowing efficient harvest and application of the graft in a single seamless operative session that minimises your total anaesthetic time.
Non-Union Site Preparation
The non-union site is exposed and the sclerotic bone ends are freshened using an oscillating saw, osteotome, and high-speed burr until fresh bleeding bone is visible from all surfaces. This critical biological activation step stimulates the body's own bone-healing cells to respond and form new bone across the previously failed repair.
Iliac Crest Bone Graft Harvest and Application
Autologous cancellous bone graft is harvested from your iliac crest through a separate small incision over the pelvis. This graft — rich in bone-forming cells, growth factors, and structural scaffold — is packed generously around and into the prepared non-union site before stable fixation is applied.
Rigid Fixation and Wound Closure
A plate, intramedullary nail, or external fixator is applied to provide the rigid mechanical stability that is essential for bone healing to occur across the grafted non-union site. Both wounds are closed carefully and drain placement is used where appropriate. Your surgeon explains the expected healing timeline and follow-up imaging schedule before discharge.
What to Expect
Bone Grafting for Non-Union is performed under general anaesthesia and takes 2 to 3 hours. The non-union site is exposed, the sclerotic bone ends freshened to bleeding bone to stimulate a biological healing response, the bone graft packed meticulously around the non-union, and rigid fixation applied with a plate or intramedullary nail. Iliac crest bone graft is harvested through a separate small incision over the pelvis at the same time. Most patients are discharged within 3 to 5 days with weight-bearing as prescribed and physiotherapy from day one.
Recovery
After Bone Grafting for Non-Union, follow your surgeon's weight-bearing instructions precisely — premature full loading can re-displace the graft and fixation before healing occurs. Stop smoking permanently — every cigarette directly impairs bone healing at the cellular level. Attend serial X-rays at 6, 12, and 24 weeks to monitor progressive callus formation and union. Contact your orthopaedic team immediately for any return of pain, swelling, deformity, fever, or wound discharge.
Frequently Asked Questions
Common questions about bone grafting for non-union of large bones.
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