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Related Experiment Videos

Fractures in large-segment allografts

R C Thompson1, E A Pickvance, D Garry

  • 1Department of Orthopaedic Surgery, University of Minnesota, Minneapolis 55455.

The Journal of Bone and Joint Surgery. American Volume
|November 1, 1993
PubMed
Summary
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Large-segment allografts used for skeletal replacement after cancer surgery can fracture, particularly when patients receive chemotherapy and internal fixation devices penetrate the graft. However, most fractures can be successfully managed, achieving the goal of functional skeletal reconstruction.

Area of Science:

  • Orthopedic surgery
  • Oncology
  • Biomaterials science

Background:

  • Large-segment allografts are utilized for skeletal reconstruction following tumor resection.
  • Graft survival and functional outcomes are critical considerations in oncologic orthopedic surgery.

Purpose of the Study:

  • To evaluate the fracture incidence and outcomes of large-segment allografts implanted for neoplastic conditions.
  • To identify risk factors associated with allograft fracture in this patient population.

Main Methods:

  • Retrospective review of 35 large-segment allografts implanted for neoplastic conditions.
  • Minimum follow-up of 36 months, with specific analysis of fractured allografts.
  • Multivariate analysis to identify correlations with fracture development.

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Main Results:

  • Sixteen of 35 allografts (45.7%) fractured at a mean of 26 months post-implantation.
  • Lack of vascularization and soft-tissue attachment was noted at fracture sites.
  • Seven fractures showed radiographic and clinical signs of union; 8 were salvaged with autogenous bone grafts; 2 healed spontaneously.
  • Twenty-nine of 35 procedures (82.9%) achieved the primary goal of functional skeletal replacement.
  • Chemotherapy use concurrent with internal fixation penetrating graft cortices correlated significantly with fracture (p < 0.05).

Conclusions:

  • Despite a notable fracture rate, large-segment allografts can achieve successful functional skeletal replacement in oncologic cases.
  • Chemotherapy and specific internal fixation methods are risk factors for allograft fracture.
  • Salvage options and spontaneous healing contribute to favorable overall outcomes.