TY - JOUR
T1 - Unicompartmental knee arthroplasty 11-year experience from 3929 implants in RIPO register
AU - Bordini, Barbara
AU - Stea, Susanna
AU - Falcioni, Stefano
AU - Ancarani, Cristina
AU - Toni, Aldo
PY - 2014
Y1 - 2014
N2 - Background: Since 2000, the Register of Prosthetic Orthopedic Implants (RIPO) has been following all hip, knee, and shoulder arthroplasties in the Emilia-Romagna region, comprising 4.5. million inhabitants, in northern Italy. The aim of the present analysis was to present the main figures of unicompartmental knee implants processed from the Registry. Methods: During the period 2000-2011, 3929 unicompartmental knee arthroplasties were performed on 3645 resident patients, of which 71% were females. The medial condyle was treated in 94% of cases, where mean age at surgery was 67.3. years and mean body weight was 76.6. kg. The main outcome measure was time to revision of at least one single component. The Kaplan-Meier survival and Cox multivariate analyses have been applied. Results: At 10-year follow-up, the percentage of survival was 86.8% (confidence interval (CI) at 95% was 84.1-89.5); total aseptic loosening represented 42% of the causes of failure, pain represented 15%, and sepsis represented 11%. Age at surgery significantly influences the survival of the prosthesis, whatever the reason for revision, while the type of tibial component (monoblock or metal tray) does not appear to be a determinant. Septic failure is not prevented by the use of antibiotic-loaded cement. Conclusion: Results are comparable to main orthopedic registries from Scandinavia, Australia, and New Zealand, even if some differences can be highlighted.
AB - Background: Since 2000, the Register of Prosthetic Orthopedic Implants (RIPO) has been following all hip, knee, and shoulder arthroplasties in the Emilia-Romagna region, comprising 4.5. million inhabitants, in northern Italy. The aim of the present analysis was to present the main figures of unicompartmental knee implants processed from the Registry. Methods: During the period 2000-2011, 3929 unicompartmental knee arthroplasties were performed on 3645 resident patients, of which 71% were females. The medial condyle was treated in 94% of cases, where mean age at surgery was 67.3. years and mean body weight was 76.6. kg. The main outcome measure was time to revision of at least one single component. The Kaplan-Meier survival and Cox multivariate analyses have been applied. Results: At 10-year follow-up, the percentage of survival was 86.8% (confidence interval (CI) at 95% was 84.1-89.5); total aseptic loosening represented 42% of the causes of failure, pain represented 15%, and sepsis represented 11%. Age at surgery significantly influences the survival of the prosthesis, whatever the reason for revision, while the type of tibial component (monoblock or metal tray) does not appear to be a determinant. Septic failure is not prevented by the use of antibiotic-loaded cement. Conclusion: Results are comparable to main orthopedic registries from Scandinavia, Australia, and New Zealand, even if some differences can be highlighted.
KW - Epidemiology
KW - Failure
KW - Register
KW - Unicompartmental knee prosthesis
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U2 - 10.1016/j.knee.2014.02.012
DO - 10.1016/j.knee.2014.02.012
M3 - Article
C2 - 25108842
AN - SCOPUS:84926261864
VL - 21
SP - 1275
EP - 1279
JO - Knee
JF - Knee
SN - 0968-0160
IS - 6
ER -