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Patellar tendon rupture and marked joint instability after total knee arthroplasty
Takatomo Mine1, Hiroshi Tanaka, Tosihiko Taguchi
1Department of Orthopaedic Surgery, Yamaguchi University School of Medicine, Yamaguchi, Japan. tmine@po.cc.yamaguchi-u.ac.jp
Background:
Patellar tendon rupture is a rare complication of total knee arthroplasty (TKA). Multiple repair methods have been described in the literature.
Methods:
A 66-year-old woman suffered a patellar tendon re-rupture and marked joint instability within 6 months after revision TKA. She underwent re-revision TKA and extensor mechanism reconstruction with femoral quadriceps tendon and augmentation by a Leeds-Keio ligament.
Result:
It was fairly difficult to acquire a satisfactory range of motion as well as gain in knee extension capacity by eliminating the extension lag.
Conclusion:
Patellar tendon ruptures after TKA should be repaired as soon as they are recognized.