کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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4061888 | 1604059 | 2008 | 6 صفحه PDF | دانلود رایگان |
Stem dissociation in modular revision knee arthroplasty, due to failure of the frictional lock of the Morse taper, has previously been reported in the literature. The medium-term to long-term implications of stem dissociation are however unknown because the clinical outcomes have not been reported. We report a series of 10 cases of tibial-stem dissociation in the Coordinate revision knee system (DePuy, Warsaw, Ind). At an average follow-up of 8.1 years (range, 6-11 years), there was no detriment to the clinical outcome in 9 cases in which there was a contained bony defect. In one case in which there was a significant medial-tibial uncontained bony defect, there was a failure of the prosthesis, which necessitated re-revision arthroplasty surgery at 4 years. We therefore question whether long canal-filling tibial stems are necessary in all revision knee arthroplasties, particularly when there is a contained bone defect together with optimal alignment and adequate support of the prosthesis, and a non–constrained-polyethylene insert is used.
Journal: The Journal of Arthroplasty - Volume 23, Issue 8, December 2008, Pages 1140–1145