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Objective - to study the structure of complications developing after unicompartmental knee arthroplasty and to analyze its causes. Material and methods. The causes of 18 revision interventions after 142 consecutive UKA that have been performed in 137 patients since 2001 till 2012 were evaluated. The main reason for revision surgeries in these series was traumatic damage of different knee structures (7 cases): 3 - medial femur or tibia condyle fractures due to fall from height or collision, 1 - ACL rupture and one bearing dislocation both during mountain skiing injury, 1 - lateral menisci tear after rotational trauma, 1 - loose body formation caused by direct blow. All traumatic events took place during first five years after surgery. Other indications for revision were aseptic loosening of tibial component in 6 patients (after 4,8 years in average), disease progression in 2 (after 3 years in average), early infection in 1 and late hematogenous infection in 2 cases. In 16 patients revision TKA were performed with 10 cruciate-retaining, 5 posterior stabilized and 1 varus-valgus constrained implants. In 2 patients with lateral menisci tear and loose body arthroscopical intervention resolved the problem. Surprisingly in this cohort of patients acute trauma especially during sport activities shared the first place with aseptic loosening among the reasons for revision after UKA. This indirectly evidences that patients after UKA retained high level of physical activities and less restricted in sport that after TKA.

About the authors

N. N. Kornilov

Vreden Russian Research Institute of Traumatology and Orthopedics

Author for correspondence.
Russian Federation

T. A. Kulyaba

Vreden Russian Research Institute of Traumatology and Orthopedics

Russian Federation

R. E. Fedorov

Smolensk Regional Clinical Hospital

Russian Federation


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