Fig. 1From: Factors affecting aseptic loosening in primary total knee replacements: an in vitro studyThe classic loosening of the implant in worst instances begins with a delamination pull-away of the cement on the posterior keel, followed by failure of the proximal posterior tibial surfaces; Compare the positioning immediately post-op (a) verses that at 6 months, where the slope changes from 7o to 9o and the implant subsides (b)Back to article page