Translated article] Results of cementless total knee arthroplasty in patients over 70 years of age

Abstract

ObjectiveTo analyse the clinical and radiologic results, the survival and complications obtained in 70 year or older patients who underwent cementless total knee arthroplasty (TKA). Material and methodAn observational study of patients operated between January 2014 and December 2016 was carried out according to the Natural Knee model (Zimmer®, USA). The main variables were the Oxford Knee Score, the visual analogue scale, the presence of radiolucencies, complications, survival and reasons for revision. ResultsOf 104 TKA, 86 were available for revision. The median age was 76 years. The mean follow-up was 5.4 years (range 3.7–6.9). The Oxford Knee Score punctuation showed a median of 17 presurgical (range 0–40) and 37 post surgical (range 5–48), P<.001. The 87.2% of the patients obtained a clinically significant improvement. The median visual analogue scale punctuation was 8 for presurgical (range 4–10) and 2 for post surgical (range 1–9), P<.001. The 88.3% of the patients obtained a clinically significant decrease. Three months after the surgery, the 55.81% of the TKAs presented radiolucencies around the tibial plateau. At the end of the follow-up, radiolucencies were present in 30.23% of the TKAs. Survival from all causes was 91.86% at 77.2 months and 96.5% due to aseptic loosening. ConclusionCementless knee prostheses are a valid option in patients aged 70 or older, presenting good clinical, radiological and survival results.