Long-term Results of Hybrid Total Knee Arthroplasty: Minimum 10-years Follow-up.
OBJECTIVE
To evaluate the survival rate and long term clinical outcomes of hybrid total knee arthroplasty (TKA).


METHODS
We retrospectively analyzed 113 hybrid TKAs (NexGen) in 86 patients that were followed for more than 10 years. Kaplan-Meier survival curves were generated using revision as an end point. Knee Society Score (KSS) and range of motion were evaluated for clinical assessment and plane radiographs were used to evaluate implant problems.


RESULTS
At 11.2 years (range, 10 to 12.2 years) of follow-up on average, 7 knees required revision. The reason for revision was aseptic loosening in 4 knees (1 in femoral and tibial component and 3 in tibial component only) and infection in 3 knees. The survival rate was 93.8% at 12 years for all knees, and 96.5% when septic loosening was excluded. The KSS improved from 29.3 to 91.5 in the Cruciate-Retaining type (CR) and from 21.5 to 90.3 in the posterior stabilizing type (PS) at latest follow-up. The average range of motion was improved from 120.6° to 133.8° in the CR type and 119.5° to 135.5° in the PS type.


CONCLUSIONS
Hybrid TKA provides good survival rates and clinical results comparable to cemented TKA.
Department of Orthopedic Surgery, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Korea.
Young Joon
YJ
Choi
Ki Won
KW
Lee
Chung Hwan
CH
Kim
Hyung Sun
HS
Ahn
Jae Kwang
JK
Hwang
Jeong Ho
JH
Kang
Hee Don
HD
Han
Wan Jong
WJ
Cho
Jun Seok
JS
Park