Reconstruction of Knee Joint Bone Defects with Bone Transpor
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The increase in primary TKAs has led to an increase in infectious complications, revision surgery and bone loss. Knee joint bone defects (KJBD) may be managed using bone transport and arthrodesis with Ilizarov or bone transport over nail (BTON) techniques. The aim of this study was to compare both techniques in the reconstruction of KJBDs.

This was a retrospective cohort study of 29 patients with extensive KJBD. All patients underwent reconstruction of the KJBD using bone transport (either Ilizarov or BTON techniques). The primary outcome variables for comparison between the two groups included time in frame (days), External Fixation Index (EFI, days/cm), residual limb length discrepancy LLD (cm) and complications (Caton classification).

Results:
--Gender and age profiles were comparable.
--Mean time spent in frame for bone transport was 566 days for the Ilizarov cohort and 191 days for BTON.

--External fixation index for the period of bone transport was 75.1 days/cm for the Ilizarov cohort and 24.7 days/c for BTON.

--Union, LLD and complication rates were comparable between both groups.

To summarize, BTON is preferred for the management of KJBD after a failed TKA because it spends substantially less time in the frame, has lower EFI, and has higher rates of regular mechanical alignment. When BTON is contraindicated, the Ilizarov method can be useful.y be useful when there is a contraindication to BTON.

Source: https://www.sciencedirect.com/science/article/abs/pii/S0883540321002497?dgcid=rss_sd_all
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