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Erschienen in:
01.02.2012 | Orthopaedic Surgery
Cause of infection in proximal tibial endoprosthetic reconstructions
Erschienen in: Archives of Orthopaedic and Trauma Surgery | Ausgabe 2/2012
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Introduction
The underlying cause of proximal tibial prosthetic failure by infection is unclear. We asked: (1) Is resection amount related to prosthetic infection? (2) What other risk factors are related with infection? (3) What are the survivorship and functional outcomes of proximal tibial endoprosthetic reconstruction?
Methods
Sixty-two patients who underwent modular proximal tibial megaprosthesis reconstruction were analyzed. Follow-up duration averaged 98 months (range 26–240 months). Associations between prognostic variables and prosthesis survival were assessed.
Results
The 10-year prosthetic survival of the 62 implants was 73.9 ± 11.7%. Prostheses were removed in 16 (25.8%) patients for infection and 3 of the 16 underwent amputation. Resection of >37% (P = 0.016) of the tibia was found to be related to infection. Application of chemotherapy (P = 0.912) and use of synthetic material to fix the patella tendon (P = 0.2) were not found to influence prosthetic survival. Functional outcomes (determined by the MSTS system) of the 52 patients that maintained a mobile joint averaged 24.2 (81%) (range 18–28).
Conclusions
Our study suggests that the amount of bone resection is related with prosthetic failure by infection, however, the contribution of other risk factors should not be underestimated.