Lower Extremity Megaprostheses in Orthopaedic Oncology

Area of Science:

• Orthopedic surgery
• Biomaterials science
• Reconstructive surgery

Background:

• Megaprostheses aim to replicate bone and soft tissue structures after segmental loss.
• Improvements in design and surgical techniques have enhanced functional restoration.
• Challenges include material selection, tissue integration, anatomical reproduction, and skeletal adaptation.

Purpose of the Study:

• To review the historical development and current state of megaprosthesis use.
• To identify key challenges and failure modes associated with megaprostheses.
• To discuss the future directions for megaprosthesis design and application.

Main Methods:

• Historical review of megaprosthesis use in various anatomical locations (pelvis, femur, tibia).
• Analysis of design principles, material science considerations, and surgical implementation.
• Evaluation of common complications and failure mechanisms.

Main Results:

• Significant advancements have been made in restoring function with megaprostheses.
• Specific anatomical sites present unique challenges for megaprosthesis integration.
• Failure can occur due to soft-tissue issues, loosening, structural failure, infection, or tumor recurrence.

Conclusions:

• Megaprostheses are a valuable option for limb salvage and functional restoration in carefully selected patients.
• Continued innovation in materials and surgical techniques is crucial for improving outcomes.
• Understanding historical challenges guides the development of next-generation reconstructive devices.