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Survival UKA
Knee » Survival UKA » UKA by type of revision
FIGURE Cumulative revision percentage of unicondylar knee arthroplasties by type of revision in the Netherlands in 2007-2022 (n=48,029)
TABLE Cumulative revision percentages
Number at risk (n) | Competing Risk (95% CI) | Kaplan Meier¹ (95% CI) | |
Any type of revision | |||
1-year revision (%) | 40,463 | 2.1 (1.9-2.2) | 1.9 (1.8-2.0) |
3-year revision (%) | 28,856 | 5.3 (5.1-5.4) | 5.3 (5.0-5.5) |
5-year revision (%) | 19,562 | 7.2 (6.9-7.4) | 7.2 (6.9-7.5) |
10-year revision (%) | 6,547 | 11.6 (11.2-12.1) | 12.0 (11.5-12.4) |
14-year revision (%) | 1,437 | 14.8 (14.1-15.4) | 15.5 (14.8-16.2) |
Major revision² | |||
1-year revision (%) | 40,748 | 1.2 (1.1-1.3) | 1.1 (1.0-1.2) |
3-year revision (%) | 29,186 | 4.1 (3.9-4.3) | 4.1 (3.9-4.2) |
5-year revision (%) | 19,839 | 5.7 (5.5-6.0) | 5.8 (5.5-6.0) |
10-year revision (%) | 6,636 | 9.9 (9.5-10.4) | 10.3 (9.8-10.7) |
14-year revision (%) | 1,456 | 13.0 (12.4-13.7) | 13.7 (13.0-14.4) |
Minor revision³ | |||
1-year revision (%) | 40,889 | 0.9 (0.8-1.0) | 0.9 (0.8-1.0) |
3-year revision (%) | 30,142 | 1.4 (1.3-1.5) | 1.5 (1.4-1.6) |
5-year revision (%) | 21,000 | 1.7 (1.6-1.9) | 1.8 (1.7-1.9) |
10-year revision (%) | 7,665 | 2.1 (2.0-2.3) | 2.2 (2.1-2.4) |
14-year revision (%) | 1,760 | 2.3 (2.1-2.5) | 2.5 (2.3-2.7) |
¹ The cumulative revision percentage using the Kaplan Meier method is shown in the figure.
² First revision of the femur or tibia component, regardless of whether a minor revision has already taken place. Therefor, the first three revision procedures were reviewed.
³Only insert and/or patella exchange (including patella addition).
UKA: unicondylarl knee arthroplasty; CI: confidence interval.
© LROI 2023
In 2007-2022, 2,153 (4.5%) primary UKAs were implanted in patients who died within fourteen years after the primary diagnosis
Knee » Survival UKA » UKA by procedure year
FIGURE Cumulative major revision percentage of unicondylar knee arthroplasties for osteoarthritis by procedure year of primary UKA in the Netherlands in 2009-2022 (n=32,727)
TABLE Cumulative major revision percentages
Cumulative major revision percentages – Kaplan Meier (95% CI) | |||||||
Procedure year primary UKA for osteoarthritis | Number (n) | 1yr | 3yr | 5yr | 7yr | 10yr | 13yr |
2009-2010 | 3,151 | 1.81 (1.34-2.28) | 6.77 (5.89-7.65) | 9.68 (8.64-10.72) | 11.66 (10.53-12.79) | 14.89 (13.63-16.15) | 17.8 (16.41-19.19) |
2011-2012 | 3,069 | 1.80 (1.33-2.27) | 6.71 (5.82-7.60) | 8.94 (7.93-9.95) | 10.97 (9.86-12.08) | 13.17 (11.96-14.38) | n.a. |
2013-2014 | 4,033 | 1.34 (0.99-1.69) | 5.63 (4.92-6.34) | 7.55 (6.73-8.37) | 9.20 (8.30-10.10) | 11.94 (10.66-13.22) | n.a. |
2015-2016 | 5,509 | 1.22 (0.93-1.51) | 3.85 (3.34-4.36) | 5.00 (4.42-5.58) | 6.31 (5.65-6.97) | n.a. | n.a. |
2017-2018 | 7,583 | 0.86 (0.65-1.07) | 2.88 (2.50-3.26) | 3.93 (3.48-4.38) | n.a. | n.a. | n.a. |
2019-2020 | 9,382 | 0.78 (0.60-0.96) | 2.63 (2.29-2.97) | n.a. | n.a. | n.a. | n.a. |
Major revision: First revision of the femur or tibia component, regardless of whether a minor revision has already taken place. Therefor, the first three revision procedures were reviewed.
Please note: n.a. if <50 cases were at risk; CI: confidence interval.
© LROI 2023
Knee » Survival UKA » UKA cemented by procedure year
FIGURE Cumulative major revision percentage of cemented unicondylar knee arthroplasties for osteoarthritis by procedure year of primary arthroplasty in the Netherlands in 2009-2022 (n=18,728)
TABLE Cumulative major revision percentages
Cumulative major revision percentages – Kaplan Meier (95% CI) | |||||||
Procedure year primary cemented UKA for osteoarthritis | Number (n) | 1yr | 3yr | 5yr | 7yr | 10yr | 13yr |
2009-2012 | 5,643 | 1.79 (1.44-2.14) | 6.86 (6.20-7.52) | 9.51 (8.74-10.28) | 11.59 (10.75-12.43) | 14.48 (13.55-15.41) | 17.28 (16.18-18.38) |
2013-2016 | 5,959 | 1.09 (0.83-1.35) | 5.07 (4.51-5.63) | 6.90 (6.25-7.55) | 8.48 (7.76-9.20) | 11.67 (10.32-13.02) | n.a. |
2017-2020 | 7,126 | 0.66 (0.47-0.85) | 3.23 (2.81-3.65) | 4.63 (4.05-5.21) | n.a. | n.a. | n.a. |
Major revision: First revision of the femur or tibia component, regardless of whether a minor revision has already taken place. Therefor, the first three revision procedures were reviewed.
Please note: n.a. if <50 cases were at risk; CI: confidence interval.
© LROI 2023
Knee » Survival UKA » UKA uncemented by procedure year
FIGURE Cumulative major revision percentage of uncemented unicondylar knee arthroplasties for osteoarthritis by procedure year of primary arthroplasty in the Netherlands in 2009-2022 (n=13,292)
TABLE Cumulative major revision percentages
Cumulative major revision percentages – Kaplan Meier (95% CI) | |||||||
Procedure year primary uncemented UKA for osteoarthritis | Number (n) | 1yr | 3yr | 5yr | 7yr | 10yr | 13yr |
2009-2012 | 411 | 1.22 (0.16-2.28) | 4.42 (2.42-6.42) | 5.42 (3.22-7.62) | 6.95 (4.46-9.44) | 8.49 (5.77-11.21) | n.a. |
2013-2016 | 3,412 | 1.53 (1.12-1.94) | 3.68 (3.05-4.31) | 4.51 (3.81-5.21) | 5.70 (4.90-6.50) | n.a. | n.a. |
2017-2020 | 9,469 | 0.92 (0.73-1.11) | 2.31 (2.00-2.62) | 3.02 (2.63-3.41) | n.a. | n.a. | n.a. |
Major revision: First revision of the femur or tibia component, regardless of whether a minor revision has already taken place. Therefor, the first three revision procedures were reviewed.
Please note: n.a. if <50 cases were at risk; CI: confidence interval.
© LROI 2023
Knee » Survival UKA » UKA by component
TABLE Cumulative revision percentages of primary unicondylar knee arthroplasties by prosthesis component combination of patients who underwent a UKA for osteoarthritis in the Netherlands in 2007-2022 (n=47,050)
Type of revision (n) | Cumulative revision percentage Kaplan Meier (95% CI) | |||||||||||||||
Femur component | Tibia component | Total primary UKAs (n) | Median (IQR) age (yr) | Total RAs (n) | Total knee (complete revision) | Patella addition | Only femur component | Only tibia component | Only insert/ patella | Missing/ unknown | 1yr | 3yr | 5yr | 7yr | 10yr | 14yr |
All UKAs for osteoarthritis | 47,050 | 64 (58-70) | 3,318 | 2,455 | 8 | 15 | 71 | 738 | 31 | 1.9 (1.8-2.0) | 5.2 (5.0-5.5) | 7.2 (6.9-7.5) | 9.1 (8.8-9.5) | 12.0 (11.5-12.5) | 15.6 (14.9-16.3) | |
Oxford PKR Uncemented | Oxford PKR Uncemented | 19,524 | 65 (58-71) | 796 | 416 | 1 | 2 | 20 | 352 | 5 | 2.0 (1.8-2.2) | 4.3 (3.9-4.6) | 5.4 (5.0-5.8) | 6.9 (6.3-7.4) | 8.3 (7.3-9.2) | n.a. |
Oxford PKR Cemented | Oxford PKR Cemented | 15,224 | 63 (57-70) | 1,635 | 1,306 | 5 | 10 | 31 | 263 | 20 | 1.8 (1.6-2.1) | 5.9 (5.5-6.3) | 8.3 (7.8-8.7) | 10.2 (9.6-10.7) | 13.2 (12.6-13.9) | 16.8 (15.9-17.8) |
Physica ZUK | Physica ZUK | 4,745 | 63 (58-69) | 148 | 122 | 0 | 0 | 1 | 25 | 0 | 0.7 (0.4-0.9) | 3.0 (2.4-3.5) | 4.0 (3.3-4.8) | 5.6 (4.5-6.7) | 8.0 (6.3-9.7) | 10.7 (7.9-13.5) |
Genesis Uni | Genesis Uni | 1,278* | 62 (56-68) | 223 | 211 | 1 | 0 | 2 | 6 | 3 | 2.7 (1.8-3.6) | 8.9 (7.3-10.5) | 12.5 (10.6-14.3) | 15.0 (13-17) | 17.5 (15.4-19.7) | n.a. |
BalanSys Uni | BalanSys Uni | 588 | 61 (56-68) | 65 | 55 | 1 | 0 | 4 | 5 | 0 | 2.7 (1.4-4.0) | 9.1 (6.5-11.7) | 10.5 (7.7-13.4) | 12.1 (9.0-15.2) | 16.0 (12.1-19.9) | n.a. |
Journey Uni | Journey Uni | 534 | 62 (56-69) | 33 | 29 | 0 | 2 | 1 | 0 | 1 | 1.2 (0.2-2.1) | 5.2 (3.1-7.3) | 8.5 (5.5-11.4) | 10.1 (6.3-13.8) | n.a. | n.a. |
Oxford PKR Uncemented | Oxford PKR Cemented | 530 | 66 (57-73) | 34 | 22 | 0 | 0 | 0 | 12 | 0 | 3.0 (1.5-4.5) | 5.2 (3.1-7.3) | 7.5 (4.8-10.2) | 10.9 (6.9-14.8) | n.a. | n.a. |
Oxford PKR Cemented | Oxford PKR Uncemented | 231 | 66 (59-73) | 20 | 9 | 0 | 1 | 0 | 10 | 0 | 3.6 (1.1-6.0) | 7.9 (4.1-11.6) | 9.1 (4.7-13.6) | n.a. | n.a. | n.a. |
Restoris MCK | Restoris MCK | 219 | 69 (61-75) | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 1.3 (0.0-3.0) | n.a. | n.a. | n.a. | n.a. | n.a. |
Triathlon | Triathlon | 197* | 60 (54-65) | 22 | 21 | 0 | 0 | 0 | 1 | 0 | 1.5 (0.0-3.2) | 7.2 (3.6-10.8) | 8.7 (4.6-12.9) | 10.8 (5.8-15.7) | 14.9 (8.3-21.5) | n.a. |
HLS Uni | HLS Uni | 171* | 58 (52-65) | 37 | 36 | 0 | 0 | 0 | 1 | 0 | 2.3 (0.1-4.6) | 8.8 (4.5-13) | 16.5 (10.9-22.0) | 19.4 (13.5-25.4) | 20.6 (14.5-26.7) | n.a. |
Allegretto | Allegretto | 108* | 57 (51-65) | 22 | 19 | 0 | 0 | 3 | 0 | 0 | 6.5 (1.8-11.1) | 12 (5.9-18.2) | 18 (10.7-25.4) | 20.4 (12.6-28.3) | n.a. | n.a. |
Please note: n.a. if <50 cases were at risk; UKA: unicondylar knee arthroplasty; CI: confidence interval; IQR: interquartile range.
© LROI 2023
Results must be interpreted with caution. Patient characteristics like age and diagnosis, as well as procedure characteristics like the experience of the surgeon performing the procedure of the prosthesis may have influenced the cumulative revision percentages.
Knee » Survival UKA » UKA by fixation
FIGURE Cumulative revision percentage of unicondylar knee arthroplasties for osteoarthritis by fixation of revision in the Netherlands in 2007-2022 (n=45,561)
TABLE Cumulative revision percentages
Cumulative revision percentages – Kaplan Meier (95% CI) | |||||||
Number (n) | 1yr | 3yr | 5yr | 7yr | 10yr | 14yr | |
Fixation | |||||||
Cemented | 24,231 | 1.7 (1.5-1.9) | 5.8 (5.4-6.1) | 8.1 (7.7-8.5) | 10.1 (9.6-10.6) | 13.2 (12.6-13.7) | 16.8 (16.0-17.7) |
Uncemented | 21,330 | 2.1 (1.9-2.3) | 4.4 (4.1-4.7) | 5.5 (5.1-5.9) | 7.1 (6.6-7.7) | 8.8 (7.8-9.8) | 11.3 (9.0-13.6) |
Please note: Dotted lines represent the upper and lower limits of the 95% confidence interval.
UKA: unicondylar knee arthroplasty; CI: confidence interval.
© LROI 2023