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Numbers
Knee » Numbers » Registered procedures
TABLE Number of registered knee arthroplasties per year of surgery (2007-2021) in the LROI in May 2022
| Type of knee arthroplasty | ||||||
| Year of surgery | Total arthroplasty (n) | Unicondylar arthroplasty (n) | Patellofemoral arthroplasty (n) | Unknown/ missing (n) | Revision arthroplasty (n) | Total (n) |
| 2007 | 6,884 | 759 | 37 | 1,059 | 595 | 9,334 |
| 2008 | 11,609 | 1,202 | 68 | 588 | 908 | 14,375 |
| 2009 | 16,710 | 1,524 | 104 | 314 | 1,300 | 19,952 |
| 2010 | 18,420 | 1,694 | 123 | 370 | 1,624 | 22,231 |
| 2011 | 19,432 | 1,577 | 87 | 334 | 1,794 | 23,224 |
| 2012 | 21,631 | 1,557 | 138 | 403 | 2,117 | 25,846 |
| 2013 | 22,227 | 1,785 | 96 | 343 | 2,309 | 26,760 |
| 2014 | 24,134 | 2,336 | 100 | 271 | 2,557 | 29,398 |
| 2015 | 24,010 | 2,630 | 138 | 365 | 2,686 | 29,829 |
| 2016 | 24,230 | 2,829 | 129 | 887 | 2,926 | 31,001 |
| 2017 | 24,252 | 3,278 | 144 | 1,753 | 2,997 | 32,424 |
| 2018 | 25,251 | 3,788 | 147 | 936 | 2,931 | 33,053 |
| 2019 | 25,198 | 4,510 | 158 | 1,125 | 3,101 | 34,092 |
| 2020 | 18,449 | 4,179 | 142 | 1,751 | 2,496 | 27,017 |
| 2021 | 21,256 | 5,509 | 99 | 353 | 2,573 | 29,790 |
| Total | 303,693 | 39,157 | 1,710 | 10,852 | 32,914 | 388,326 |
© LROI 2022
The LROI is nearly complete as of 2010. Therefore, a dotted line was inserted between 2009 and 2010.
Knee » Numbers » Type of procedures
FIGURE Number of primary knee arthroplasties and knee revision arthroplasties registered in the LROI in the Netherlands in 2012-2021
Year
Total
Type of procedure (n)
Primary knee
23,729
24,451
26,841
27,143
28,075
29,427
30,122
30,991
24,521
27,217
272,517
Knee revision
2,117
2,309
2,557
2,686
2,926
2,997
2,931
3,101
2,496
2,573
26,693
Total:
25,846
26,760
29,398
29,829
31,001
32,424
33,053
34,092
27,017
29,790
299,210
© LROI 2022
Out of 27,217 primary knee arthroplasties that were performed in 2021,
3% (n=702) was performed bilaterally.
Knee » Numbers » Type of procedure per hospital
Knee » Numbers » Type of hospital - primary
FIGURE Trend (proportion [%] per year) in type of hospital performing primary total knee arthroplasties in the Netherlands in 2012-2021
Year
Type of hospital (%)
General hospital
89.32
88.05
88.07
86.99
86.49
88.38
85.29
84.74
82.30
76.83
85.78
85.78
Private hospital
7.47
8.87
9.14
10.31
10.84
9.25
12.80
13.31
16.17
22.11
11.88
11.88
University Medical Center
3.22
3.08
2.78
2.69
2.67
2.37
1.91
1.95
1.52
1.06
2.34
2.34
Total (n):
230,638
21,631
22,227
24,134
24,010
24,230
24,252
25,251
25,198
18,449
21,256
Please note: The number of general hospitals that performed primary total knee arthroplasties decreased from 72 to 64 between 2012-2021; the number of private hospitals increased from 11 to 19 and the number of University Medical Centers remained 7 between 2012-2021.
TKA: total knee arthroplasty.
© LROI 2022
Knee » Numbers » Type of hospital - revision
FIGURE Trend (proportion [%] per year) in type of hospital performing knee revision arthroplasties in the Netherlands in 2012-2021
Year
Type of hospital (%)
General hospital
85.92
84.58
84.75
84.51
82.19
82.15
81.54
82.36
82.93
77.65
82.75
82.75
Private hospital
6.00
7.80
6.69
5.81
7.38
7.14
8.80
8.51
8.49
12.36
7.93
7.93
University Medical Center
8.08
7.62
8.56
9.68
10.42
10.71
9.66
9.13
8.57
9.99
9.32
9.32
Total (n):
26,693
2,117
2,309
2,557
2,686
2,926
2,997
2,931
3,101
2,496
2,573
Please note: The number of general hospitals that performed knee revision arthroplasties decreased from 72 to 63 between 2012-2021; the number of private hospitals increased from 7 to 15 and the number of University Medical Centers remained 7 between 2012-2021.
RA: revision arthroplasty.
© LROI 2022
Knee » Numbers » Type of procedure by type of hospital
FIGURE Primary knee arthroplasties and knee revision arthroplasties (proportion [%] per category) by type of hospital in the Netherlands in 2021
Type of hospital
Type of procedure (%)
Primary knee
91.01
50.77
95.49
91.36
91.36
Knee revision
8.99
49.23
4.51
8.64
8.64
Total (n):
22,220
7,048
29,790
522
Please note: In 2021, 64 general hospitals, 7 UMCs and 19 private hospitals performed knee arthroplasties.
General: general hospital; UMC: university medical centre; Private: private hospital.
© LROI 2022
Knee » Numbers » Type of primary knee prosthesis by type of hospital
FIGURE Type of hospital (proportion [%] per catergory) by type of primary knee arthroplasty in the Netherlands in 2021
Type of primary KA
Type of hospital (%)
General hospital
76.83
67.09
75.76
74.83
74.83
University Medical Center
1.06
0.56
3.03
0.96
0.96
Private hospital
22.11
32.35
21.21
24.20
24.20
Total (n):
99
21,256
5,509
26,864
Please note: In 2021, 353 (1.3%) primary knee arthroplasties were registered of which the components had not been registered.
KA: knee arthroplasty; TKA: total knee arthroplasty; UKA: unicondylar knee arthroplasty; PKA: patellofemoral knee arthroplasty.
General: general hospital; UMC: university medical centre; Private: private hospital.
© LROI 2022
Knee » Numbers » Type of primary knee prosthesis by age category
FIGURE Type of primary knee arthroplasty (proportion [%] per category) of patients who underwent a primary knee arthroplasty by age category in the Netherlands in 2021
Age category
Type of primary knee arthroplasty (%)
Primary TKA
60.22
67.45
76.51
84.36
89.33
79.12
79.12
Primary UKA
34.44
31.39
23.26
15.59
10.67
20.51
20.51
Primary PKA
5.33
1.15
0.24
0.05
0.00
0.37
0.37
Total (n):
450
2,830
4,160
9,361
10,061
26,862
KA: knee arthroplasty; TKA: total knee arthroplasty; UKA: unicondylar knee arthroplasty; PKA: patellofemoral knee arthroplasty.
© LROI 2022