Revision total knee arthroplasty using the modern constrained condylar knee prosthesis

Naoki Nakano, Tomoyuki Matsumoto, Hirotsugu Muratsu, Kazunari Ishida, Ryosuke Kuroda, Masahiro Kurosaka

Resumo


Objective: We conducted this study in order to determine whether the second-generation constrained condylar prosthesis provided satisfactory results in revision total knee arthroplasty.
Methods: A series of 41 cases of revision total knee arthroplasty using the second-generation constrained condylar knee prosthesis was reviewed. The cases comprised 7 men and 34 women with a mean age of 73.2 years. The original diagnosis was predominantly osteoarthritis. The most common reason for revision was aseptic loosening. The mean interval between the primary and revision surgeries was 66.4 months. The mean follow-up period was 49.4 months.
Results: The mean Knee Society knee score improved after revision surgery from 43.8 to 82.9, the mean Knee Society function score improved from 37.1 to 79.2, the range of motion improved from 95.6° to 105.6° and the radiological femorotibial alignment improved from 181.4° (varus 6.4°) to 174.9° (valgus 0.1°), on average (p < 0.001 at all items).
Conclusion: Revision total knee arthroplasty with the use of the second-generation constrained condylar knee prosthesis yielded reproducible clinical success.

Level of Evidence IV, Case series.

Keywords
Revision total knee arthroplasty
Constrained knee prosthesis
Clinical outcome
Radiological results



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