Table 1.
Comparative studies for patient-specific instruments (PSI) assessments
| Study | Patient | System | Implant | Method | HKA | CTA | CFA | STA | SFA |
|---|---|---|---|---|---|---|---|---|---|
| Nam et al. [16] 2013 | 41 | Signature Biomet (MRI) | Vanguard Complete Knee System (Biomet) | X-rays | 0.8° ± 2.9° 29.3 % outliers |
0.4° ± 1.6° 12.8 % outliers |
0.1° ± 1.5° 9.8 % outliers |
NA | NA |
| Chen et al. [15] 2013 | 29 | Zimmer PSI system (MRI) | Zimmer Nexgen LPS system | X-rays | 179.2 ± 3.4 Nine outliers (31 %) |
89.8 ± 1.9 Three outliers (10 %) |
89.9 ± 2.1 Two outliers (7 %) |
84.2 ± 3.4 Seven outliers (24 %) |
87.7 ± 2.6 Seven outliers (24 %) |
| Boonen et. al [17] 2013 | 45 | Signature Biomet (MRI) | Vanguard Complete Knee System (Biomet) | X-rays | 179° ± 2.8 30 % outliers |
90° ± 2.0 9 % outliers |
89° ± 2.1 13 % outliers |
92° ± 3.2 33 % outliers |
96° ± 5 49 % outliers |
| Parratte et al. [18] 2013 | 20 | Zimmer PSI system (MRI) | Zimmer Nexgen LPS system | X-rays | 179° (171–185) 4 outliers (20 %) |
89.1 (85–96) | 90.1 (84–83) | 5.9 (3–9) | 8.15 (2–14) |
| Pietsch et al. [14] 2013 | 50 | Zimmer PSI system (MRI) | Zimmer Nexgen LPS system | X-rays | 3 outliers (6 %) |
4 outliers (8 %) |
5 outliers (10 %) |
3 outliers (6 %) |
3 outliers (6 %) |
| Daniilidis et al. [19] 2013 | 150 | Visionaire PSI Smith&Nephew (MRI) | Genesis II (Smith and Nephew) | X-rays | 178.4 ± 1.5 14 outliers (9.3 %) |
NA | NA | NA | NA |
| Vundelinckx et al. [20] 2013 | 31 | Visionaire PSI Smith&Nephew (MRI) | Genesis II (Smith and Nephew) | X-rays | 183 ± 2.59 | NA | NA | NA | NA |
| Koch et al. [21] 2013 | 301 | MyKnee Medacta (CT) | GMK (Medacta) | X-rays | 180.1° ± 2.0 34 outliers (11.7 %) |
11 outliers (3.8 %) | 13 outliers (4.5 %) | 37 outliers (12.3 %) | 27 outliers (9 %) |
| Scholes et al. [22] 2013 | 30 | Zimmer PSI system (MRI) | Zimmer Nexgen LPS system | Nav | 179.5° 8 outliers (27 %) |
NA | NA | NA | NA |
| Lustig et al. [23] 2013 | 60 | Visionaire Smith&Nephew (MRI) | Genesis II (S&N) | Nav | 179.8 20.9 % outliers |
NA | NA | NA | NA |
| Daniilidis et al. [24] 2012 | 124 | Visionaire Smith&Nephew (MRI) | Genesis II (Smith and Nephew) | X-rays | 178.5 ± 1.7 11 outliers (11 %) |
NA | NA | NA | NA |
| Bali et al. [13] 2012 | 32 | Visionaire Smith&Nephew (MRI) | Genesis II (Smith and Nephew) | X-rays | 179.9 3 outliers (9.4 %) |
NA | NA | NA | NA |
| Boonen et al. [25] 2012 | 38 | Signature Biomet (MRI) | Vanguard Complete Knee System (Biomet) | X-rays | 181° ± 4 11 outliers (29 %) |
91° ± 2 7 outliers (18 %) |
90° ± 2 2 outliers (5 %) |
94° ± 4 14 outliers (37 %) |
85° ± 4 16 outliers (42 %) |
| Ng et al. [26] 2012 | 569 | Signature Biomet (MRI) | Vanguard Complete Knee System (Biomet) | X-rays | 180.6° 9 % outliers |
89.9° 10 % outliers |
90.7° 22 % outliers |
NA | NA |
| Conteduca et al. [7] 2012 | 12 | Visionaire Smith&Nephew (MRI) | Journey BCS (S&N) | Nav | NA | 1.2° ± 1.5 2 outliers (16 %) |
1.2° ± 0.6 2 outliers (16 %) |
3.8° ± 2.4 9 outliers (75 %) |
+0.5° ± 2.15 3 outliers (25 %) |
| Noble et al. [27] 2012 | 15 | Visionaire Smith&Nephew (MRI) | Legion Total Knee System (Smith & Nephew) | X-rays | 181.7 | NA | NA | NA | NA |
| Nunley et al. [28] 2012 | 57 | Vanguard total knee system (Biomet) (MRI) | Signature system (Biomet) | CT-scan | 26 % outliers | NA | NA | NA | NA |
HKA hip-knee-ankle angle, CTA coronal tibial angle, CFA coronal femoral angle, STA sagittal tibial angle, SFA sagittal femoral angle