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Endoprosthetic replacement of the proximal tibia
R J Grimer1, S R Carter, R M Tillman
1Royal Orthopaedic Hospital, Northfield, Birmingham, UK.
The Journal of Bone and Joint Surgery. British Volume
|June 29, 2000
Summary
Limb-salvage surgery for proximal tibia tumors using endoprosthetic replacement achieved an 88% success rate. Despite complications like infection and implant failure, functional outcomes justify the procedure, with ongoing improvements reducing risks.
Area of Science:
- Orthopedic Surgery
- Oncology
- Biomedical Engineering
Background:
- Tumors of the proximal tibia present significant challenges for limb salvage.
- Endoprosthetic replacement is a key surgical option for these cases.
- Historically, high complication rates have been associated with this procedure.
Purpose of the Study:
- To evaluate the long-term outcomes of endoprosthetic replacement for proximal tibia tumors.
- To identify complications and failure modes associated with the procedure.
- To assess the impact of surgical technique modifications on patient outcomes.
Main Methods:
- Retrospective analysis of 151 patients undergoing endoprosthetic replacement over 20 years.
- Detailed review of surgical techniques, implant modifications, and complication rates.
- Assessment of limb salvage rates, reoperation probabilities, and amputation risks.
Main Results:
- Limb salvage was achieved in 88% of patients.
- Initial infection rates of 36% were reduced to 12% with medial gastrocnemius flap use.
- Implant loosening and breakage remain significant failure modes.
- Ten-year probability of further surgery was 70%; amputation risk was 25%.
Conclusions:
- Endoprosthetic replacement offers a viable limb salvage option for proximal tibia tumors.
- Surgical technique modifications, such as the gastrocnemius flap, can mitigate specific complications like infection.
- Ongoing development of improved endoprosthetic designs, like rotating hinge implants, is crucial for reducing mechanical failures and improving long-term outcomes.