Blood cobalt ion level in patients with different sizes of cobalt/chrome femoral head with the Accolade TMZF stem.
Int Orthop
; 46(10): 2205-2212, 2022 10.
Article
em En
| MEDLINE
| ID: mdl-35840813
ABSTRACT
BACKGROUND:
Corrosion of stem-cobalt/chromium (Co/Cr) head interface and subsequent systemic Co ion complication have been a clinical concern after total hip arthroplasty (THA). The aim of this study is to investigate correlation between type of femoral head and blood Co ion level.METHODS:
One hundred four patients with THA using accolade TMZF and Co/Cr femoral head (32-mm; 55 cases, 36-mm; 20 cases, dual mobility system (DM) with 22.2 or 28-mm inner head; 29 cases) participated in this study, and blood Co ion concentration test was performed in patients a minimum of four years after THA.RESULTS:
DM group was significantly older than 32-mm and 36-mm group (DM 73.9 ± 4.6, 32-mm 63.3 ± 8.5, 36-mm 66.8 ± 10.5). The median (interquartile range) blood Co concentration of each group was 32-mm group 0.26 µg/L (0.69), 36-mm group; 0.21 µg/L (0.30); and DM group 0.21 µg/L (0.13). There was a significant difference of Co concentration between DM and 32-mm group (p = 0.023). Abnormal values of the blood Co concentration (> 1 µg/L) were observed in the 32-mm group; 12 cases (21.8%), 36-mm group; 2 cases (10.0%); and DM group; 0 case (0%) (p = 0.018).CONCLUSIONS:
Co blood concentration differed among the different sizes of Co/Cr femoral head. THA using DM is a safe option with low risk of complication from cobalt ion if it is used for elderly patients.Palavras-chave
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Base de dados:
MEDLINE
Assunto principal:
Cobalto
/
Prótese de Quadril
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article