Background
Methods
Patients
Radiological Imaging
Statistical Analysis
Results
No. | Initials | Sex | Age (yrs) | Time from primary TKA (mths) | Side | Type of primary prosthesis | Suspected diagnosis before SPECT/CT | Final diagnosis after SPECT/CT | Final treatment |
---|---|---|---|---|---|---|---|---|---|
1 | R.R. | m | 50 | 56 | R | Natural Knee®, Zimmer (tibial cemented, femoral uncemented) | Loosening of tibial component | Patellofemoral OA | Patellar resurfacing |
2 | H.U. | f | 73 | 29 | R | Natural Knee®, Zimmer (tibial cemented, femoral uncemented) | Loosening of tibial and/or femoral component | Patellofemoral OA | Non-surgically |
3 | S.A. | f | 85 | 59 | R | BalanSys®, Mathys (tibial cemented, femoral uncemented) | Patellofemoral hyperpression | Patellofemoral hyperpression due to flexion of femoral component; external malrotation >10°of tibial component | Non-surgically |
4 | F.L. | f | 79 | 36 | L | Triathlon®, Stryker (tibial cemented, femoral uncemented) | Loosening of tibial and/or femoral component | Insertion tendinopathy of iliotibial tract due to external malrotation of tibial component >15°; posterior tibial slope <3° | Non-surgically |
5 | P.M. | f | 55 | 68 | L | BalanSys®, Mathys (tibial cemented, femoral uncemented) | Infection | Patellofemoral OA | Patellar resurfacing |
6 | L.S. | f | 54 | 20 | L | Triathlon®, Stryker (tibial cemented, femoral uncemented) | Infection, malrotation of tibial component | Patellofemoral OA; posterior, tibial slope <3°, | Patellar resurfacing |
7 | K.G. | f | 77 | 116 | L | LCS®, Depuy (tibial cemented, femoral uncemented) | Loosening of tibial component | Loosening and external malrotation of tibial component >15°, posterior tibial slope >15° | Revision tibial component |
8 | M.D. | f | 65 | 32 | R | LCS®, Depuy (tibial cemented, femoral uncemented) | Loosening of tibial component | Patellofemoral OA | Patellar resurfacing |
9 | H.R. | m | 67 | 48 | L | BalanSys®, Mathys (tibial cemented, femoral uncemented) | Loosening of femoral component | Loosening of femoral component | Revision planned |
10 | A.C. | f | 38 | 36 | R | LCS®, Depuy (tibial cemented, femoral uncemented) | Loosening of femoral and/or tibial component | Incipient loosening of tibial component and external malrotation >10° | Non-surgically |
11 | S.C. | f | 88 | 212 | R | LCS®, Depuy (tibial cemented, femoral uncemented) | Breakage of polyethylene inlay, loosening of tibial component | Breakage of polyethylene inlay, posterior tibial slope 14° | Change of inlay |
12 | R.C. | f | 52 | 56 | R | TC Plus™, Smith&Nephew (tibial cemented, femoral uncemented) | Loosening of tibial and/or femoral component after periprosthetic fissure | No evidence for loosening; consolidation of periprosthetic fracture, patellofemoral OA | Non-surgically |
13 | W.M. | m | 74 | 34 | R | LCS®, Depuy (tibial cemented, femoral uncemented) | Loosening of tibial and/or femoral component | External malrotation of tibial component >15° | Revision recommended, treated non-surgically due to comorbidities |
14 | K.A. | f | 77 | 48 | L | Natural Knee®, Zimmer (tibial cemented, femoral uncemented) | Loosening of tibial and/or femoral component; low grade infection | No evidence for loosening. No malrotation. | Patient underwent physiotherapy; to date asymptomatic. |
15 | S.H | m | 79 | 18 | L | Triathlon®, Stryker (tibial cemented, femoral uncemented) | Loosening of tibial and/or femoral component | Patellofemoral OA | Patellar resurfacing |
16 | S.H. | m | 63 | 60 | L | TC Plus™, Smith&Nephew (tibial cemented, femoral uncemented) | Loosening of tibial and/or femoral component | Loosening of tibial component | Revision tibial component |
17 | S.H. | m | 63 | 60 | R | BalanSys®, Mathys (tibial cemented, femoral uncemented) | Loosening of tibial and/or femoral component | Patellofemoral OA, external malrotation >10° of tibial component | Non-surgically |
18 | B.W. | m | 72 | 48 | L | Triathlon®, Stryker (tibial cemented, femoral uncemented) | Loosening of tibial and/or femoral component | No evidence for loosening. No malrotation | Patient underwent physiotherapy; to date asymptomatic. |
19 | M.D. | f | 60 | 9 | R | Triathlon®, Stryker (tibial cemented, femoral uncemented) | Loosening of tibial component, patellar OA | Patellofemoral OA, posterior tibial slope <3° | Planned Patellar resurfacing |
20 | F.L. | f | 78 | 9 | R | Triathlon®, Stryker (tibial cemented, femoral uncemented) | Early loosening of tibial component, patellar OA | Patellofemoral OA, external malrotation >15° of tibial component | Planned Patellar resurfacing |
21 | L.R. | f | 61 | 18 | R | Natural Knee®, Zimmer (tibial cemented, femoral uncemented) | Oversized femoral and tibial component | Persistent synovitis due to oversized femoral and tibial component, tibial internal malrotation >10° | Femoral and tibial component revision |
22 | K.L. | m | 80 | 104 | L | LCS®, Depuy (tibial cemented, femoral uncemented) | Loosening of femoral and/or tibial component | Loosening of femoral component and tibial external malrotation >15° | Revision recommended, treated non-surgically due to comorbidities |
23 | L.J. | f | 77 | 108 | R | LCS®, Depuy (tibial cemented, femoral uncemented) | Loosening of femoral and/or tibial component | No evidence for loosening. No malrotation | Patient underwent physiotherapy; to date asymptomatic. |
No. | Tibia | Femur | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | 2 | 3 | Others | 1 | 2 | other | ||||||||||||
a | p | a | p | a | p | tip | Tibtub | shaft | sa | ia | sp | ip | sa | ia | sp | ip | shaft | |
1
| 5 | 5c | 4 | 5c | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 7 | 5c | 0 | 0 | 7 | 1 |
2
| 0 | 5c | 0 | 5 | 0 | 6 | 0 | 0 | 2 | 0 | 3 | 0 | 4 | 0 | 3 | 0 | 7c | 2 |
3
| 0 | 6 | 10c | 8 | 0 | 0 | 0 | 6 | 1 | 0 | 0 | 0 | 5c | 0 | 0 | 0 | 7c | 1 |
4
| 10c | 10c | 4 | 5 | 6 | 0 | 0 | 6 | 2 | 0 | 7c | 4 | 7c | 0 | 0 | 3 | 6c | 2 |
5. | 0 | 3 | 6 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
6
| 6 | 7 | 5 | 7 | 0 | 0 | 0 | 4 | 2 | 7c | 5 | 5 | 9c | 5 | 6 | 5 | 9 | 2 |
7
| 6 | 10c | 7c | 7c | 0 | 10c | 10c | 10 | 2 | 4 | 4 | 0 | 4c | 4 | 3 | 0 | 4c | 1 |
8
| 7c | 8c | 7c | 8c | 0 | 5 | 5 | 6 | 2 | 5 | 7 | 0 | 7 | 6 | 7 | 0 | 7 | 1 |
9
| 6 | 7 | 6 | 8 | 5 | 5 | 0 | 7 | 1 | 7 | 6 | 0 | 10c | 0 | 0 | 0 | 7c | 2 |
10
| 6 | 5 | 5 | 9c | 10 | 10c | 10c | 0 | 2 | 4 | 3 | 0 | 5c | 4 | 5c | 0 | 6c | 1 |
11
| 4c | 4c | 5c | 8c | 0 | 0 | 0 | 0 | 1 | 4 | 3 | 0 | 7c | 5 | 5c | 0 | 10c | 1 |
12
| 5c | 5c | 4c | 6c | 0 | 0 | 0 | 6 | 1 | 4 | 4 | 0 | 6c | 6 | 3 | 0 | 4c | 1 |
13
| 0 | 0 | 0 | 0 | 0 | 3 | 3 | 3 | 1 | 0 | 0 | 0 | 3c | 0 | 0 | 0 | 3c | 1 |
14
| 9c | 9c | 7c | 8c | 4c | 7c | 3c | 4 | 3 | 3 | 3 | 5 | 7c | 4 | 10c | 5 | 6 | 3 |
15
| 4c | 4c | 5c | 5c | 4 | 2 | 1 | 4 | 1 | 3c | 4 | 4c | 6 | 5c | 5c | 7c | 10 | 3 |
16
| 7 | 7 | 7c | 6c | 3c | 3c | 2 | 3 | 2 | 2 | 3c | 3 | 4c | 4c | 4c | 4c | 5c | 2 |
17
| 3 | 5c | 3c | 3c | 3c | 2c | 5c | 3 | 3 | 1 | 3c | 3 | 3c | 1 | 2c | 2 | 4c | 1 |
18
| 3 | 2 | 3 | 3 | 2c | 1 | 2 | 2 | 1 | 2 | 2c | 4c | 3 | 2 | 3 | 3c | 3 | 2 |
19
| 4 | 4 | 3c | 3c | 4c | 3c | 5c | 4 | 1 | 4c | 4c | 4c | 5c | 4c | 5c | 9c | 10c | 1 |
20
| 4 | 7c | 7c | 4c | 3c | 2c | 1 | 4 | 1 | 3c | 3c | 4c | 4c | 4c | 4c | 4c | 6c | 1 |
21
| 4 | 4 | 3 | 5c | 1 | 1 | 1 | 1 | 1 | 2 | 3c | 7c | 7c | 2 | 3c | 2c | 5c | 1 |
22
| 4 | 4 | 3 | 3 | 0 | 4 | 4 | 2 | 5 | 4 | 5c | 3 | 5c | 3 | 3 | 2 | 0 | 1 |
23
| 4 | 6 | 3 | 4 | 0 | 3 | 3 | 0 | 0 | 3 | 4 | 0 | 4 | 3 | 3 | 0 | 3 | 1 |
Median
| 4 | 5 | 5 | 5 | 0 | 2 | 1 | 3 | 2 | 3 | 3 | 0 | 5 | 4 | 3 | 0 | 6 | 1 |
Min
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
Max
| 10 | 10 | 10 | 9 | 10 | 10 | 10 | 10 | 3 | 7 | 7 | 7 | 10 | 6 | 10 | 9 | 10 | 3 |
No. | 3D-CT measurements | |||||
---|---|---|---|---|---|---|
Femoral | Tibial | |||||
Varus (+)/Valgus (-) | Flexion(+)/Extension (-) | Internal (+)/External rotation (-) | Varus (+)/Valgus (-) | Posterior slope | Internal (+)/External rotation (-) | |
1. | -5 | -5 | 0 | 5 | 10 | 2 |
2 | -7 | 1 | 6 | 8 | 2 | -8 |
3 | 4 | 1 | 2 | 0 | 10 | -14 |
4 | -8 | 3 | 5 | 8 | 2 | -20 |
5 | -2 | 3 | 4 | 1 | 8 | -5 |
6. | -2 | 0 | 1 | 3 | 1 | 9 |
7 | -9 | 0 | 4 | 3 | 19 | -29 |
8 | -4 | 5 | 2 | 4 | 6 | -1 |
9. | -4 | -4 | 6 | 4 | 8 | 2 |
10 | -5 | 6 | 5 | 6 | 10 | -14 |
11 | 5 | 9 | 4 | 2 | 14 | -9 |
12 | -12 | 0 | 0 | 3 | 5 | -8 |
13 | -9 | 3 | 9 | 5 | 7 | -17 |
14 | -8 | -2 | 3 | 1 | 8 | 5 |
15 | -8 | 1 | 0 | 4 | 4 | -4 |
16 | -8 | -2 | 5 | 4 | 10 | 1 |
17 | -5 | 5 | -1 | 4 | 9 | -15 |
18 | -6 | -1 | 7 | -1 | 10 | 1 |
19 | 1 | 1 | 0 | -1 | 1 | -5 |
20 | -8 | 9 | 3 | 2 | 5 | -20 |
21 | -9 | 6 | 4 | 4 | 9 | 11 |
22 | 2 | 5 | -5 | 5 | 4 | -16 |
23 | -5 | 11 | -5 | 5 | 9 | -17 |
No. | Initials | 1i | 1s | 2i | 2s | Median value | Highest Value medial | Highest value lateral |
---|---|---|---|---|---|---|---|---|
Patients with patellofemoral OA a s cause of knee pain | ||||||||
1
| R.R. | 6 | 8 | 8 | 10 | 8 | 8 | 10 |
2
| H.U. | 7 | 9 | 7 | 10 | 8 | 9 | 10 |
3
| S.A. | 6 | 4 | 9 | 5 | 5.5 | 6 | 9 |
5
| P.M. | 10 | 9 | 10 | 9 | 9.5 | 10 | 10 |
6
| L.S. | 7 | 8 | 8 | 10 | 8 | 8 | 10 |
8
| M.D. | 6 | 6 | 7 | 6 | 6 | 6 | 7 |
12
| R.C. | 10 | 9 | 10 | 9 | 9.5 | 10 | 10 |
15
| S.H | 10 | 9 | 7 | 7 | 8 | 10 | 7 |
17
| S.H. | 7 | 6 | 7 | 10 | 7 | 7 | 10 |
19
| M.D. | 6 | 8 | 7 | 6 | 6.5 | 8 | 7 |
20
| F.L. | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
Patient with other causes for knee pain
| ||||||||
4
| F.L. | 4 | 4 | 6 | 6 | 5 | 4 | 6 |
7
| K.G. | 6 | 5 | 6 | 6 | 6 | 5 | 6 |
9
| H.R. | 5 | 4 | 4 | 3 | 4 | 5 | 4 |
10
| A.C. | 7 | 6 | 8 | 8 | 7.5 | 6 | 8 |
11
| S.C. | 8 | 8 | 6 | 6 | 7 | 8 | 6 |
13
| W.M. | 3 | 3 | 3 | 4 | 3 | 4 | 4 |
14
| K.A. | 8 | 7 | 8 | 5 | 7.5 | 8 | 8 |
16
| S.H. | 6 | 4 | 6 | 4 | 5 | 6 | 6 |
18
| B.W. | 2 | 2 | 3 | 2 | 2 | 2 | 3 |
21
| L.R. | 5 | 3 | 8 | 5 | 5 | 5 | 8 |
22
| K.L. | 3 | 4 | 4 | 3 | 3.5 | 4 | 4 |
23
| L.J. | 4 | 3 | 3 | 3 | 3 | 4 | 3 |