TY  - JOUR
A1  - Weber, Patrick
A1  - Beck, Melina
A1  - Klug, Michael
A1  - Klug, Andreas
A1  - Klug, Alexander
A1  - Glowalla, Claudio
A1  - Gollwitzer, Hans
T1  - Survival of patient-specific unicondylar knee replacement
JF  - Journal of Personalized Medicine
N2  - Unicompartmental knee arthroplasty (UKA) in isolated medial or lateral osteoarthritis leads to good clinical results. However, revision rates are higher in comparison to total knee arthroplasty (TKA). One reason is suboptimal fitting of conventional off-the-shelf prostheses, and major overhang of the tibial component over the bone has been reported in up to 20% of cases. In this retrospective study, a total of 537 patient-specific UKAs (507 medial prostheses and 30 lateral prostheses) that had been implanted in 3 centers over a period of 10 years were analyzed for survival, with a minimal follow-up of 1 year (range 12 to 129 months). Furthermore, fitting of the UKAs was analyzed on postoperative X-rays, and tibial overhang was quantified. A total of 512 prostheses were available for follow-up (95.3%). Overall survival rate (medial and lateral) of the prostheses after 5 years was 96%. The 30 lateral UKAs showed a survival rate of 100% at 5 years. The tibial overhang of the prosthesis was smaller than 1 mm in 99% of cases. In comparison to the reported results in the literature, our data suggest that the patient-specific implant design used in this study is associated with an excellent midterm survival rate, particularly in the lateral knee compartment, and confirms excellent fitting.
KW  - unicompartmental knee arthroplasty
KW  - osteoarthritis
KW  - patient-specific implant
KW  - partial knee arthroplasty
KW  - patient-specific instruments
Y1  - 2023
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-313650
SN  - 2075-4426
VL  - 13
IS  - 4
ER  -