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Graft–Prosthetic Reconstruction & Advanced Surgical Planning

Graft–prosthetic (composite) reconstruction combines a massive bone allograft with endoprosthetic components — the allograft restores bone stock and biologic integration while the prosthesis replaces joint surfaces. Combined with 3D planning, patient-specific instrumentation, surgical navigation and augmented reality, this approach delivers exceptional precision and durability.

What is graft–prosthetic reconstruction?

Composite reconstruction merges biologic graft remodelling with durable prosthetic function, achieving 80–90% 5-year survival in limb salvage. Cancer-affected bone can also be recycled using radiation or liquid nitrogen and reused as a tumour-free graft when the bone's structural integrity is preserved.

Why use PSI and 3D printing?

  • 3D-printed bone models from your CT/MRI let the team rehearse osteotomies and select optimal implant size preoperatively.
  • Patient-specific instrumentation (PSI) guides match your anatomy exactly — accurate bone cuts and implant positioning to 1–2 mm.

Evidence: PSI reduces operative time by 30% and improves margin accuracy in bone tumour resections.

Materials used for custom implants

  • Titanium alloys (Ti6Al4V): biocompatible, high strength-to-weight, porous surfaces for bone in-growth.
  • Cobalt–chromium alloys: high wear resistance for joint articulations.
  • PEEK: radiolucent spacers in load-sharing constructs.
  • Porous tantalum coatings and hydroxyapatite enhance biologic fixation.

How AR and surgical navigation assist surgery

Augmented reality overlays your CT data on the surgical field, guiding resection planes and implant orientation in real time. Navigation systems track instruments and implants with infrared markers, achieving < 2 mm accuracy in 90% of cases. Clinical studies show AR and navigation reduce cutting errors by ~50% and improve implant alignment, reducing revision rates.

Patient journey — Priya, 30, architect

Priya required limb salvage for a proximal tibia sarcoma. Her care included CT/MRI planning with a 3D-printed tibia model for virtual resection rehearsal, custom PSI cutting blocks, a composite reconstruction (massive allograft for the diaphysis with a modular prosthetic knee), and AR navigation for real-time alignment. She resumed work in six months with 0–110° knee motion and no pain at two-year follow-up.

Real case example — long term results

Watch a real patient who underwent graft–prosthetic reconstruction for a bone tumour, with follow-up showing confident walking and durable function years after surgery.

Case study · Long-term follow-up

Graft–prosthetic reconstruction — confident walking years after surgery

A patient who received composite graft–prosthetic reconstruction for limb salvage, demonstrating sustained mobility and quality of life over the long term.

Complications and how we manage them

  • Infection 5–15% — debridement with implant retention or exchange.
  • Nonunion at graft–host junction 10–20% — enhanced by rigid fixation and biological augmentation.
  • Mechanical failure ~10% at 5 years — prosthetic loosening or allograft fracture.
  • Rare AR/navigation technical failures — managed with backup conventional techniques.

Take-home summary

Composite graft–prosthetic reconstruction with PSI, 3D printing, navigation and AR has markedly improved accuracy, reduced operative time and enhanced functional outcomes. Personalised implants and real-time guidance enable precise tumour resections and durable reconstructions — translating directly into better quality of life.

References

  1. Strauss DC et al. Composite allograft–prosthesis reconstruction outcomes. Ann Surg Oncol. 2014.
  2. Choi JW et al. 3D-printed bone tumour models for surgical planning. J Orthop Res. 2023.
  3. Wong KC et al. Patient-specific instrumentation in tumour resection. Clin Orthop Relat Res. 2015.
  4. Li J et al. Titanium porous structures for implant fixation. Biomaterials. 2022.
  5. Navab N et al. Augmented reality for orthopaedic oncology. J Med Imaging. 2021.
  6. Sugimoto M et al. Navigation-assisted accuracy in limb salvage. Int Orthop. 2019.
  7. Hillmann A et al. Infective complications of tumour megaprostheses. Int Orthop. 2012.