Table 3.
Comparison of outcomes between the static group and 3D-printed group.
| Static group (n = 22) | 3D-printed articular group (n = 20) | p value | |
|---|---|---|---|
| Interval time (wk) | 13.1 (8-24) | 12.8 (9-22) | 0.75 |
| Interim reinfection rate | 1/22 | 1/20 | 0.95 |
| Bone loss | 22/22 | 4/20 | 0.00 |
| Femoral bone loss(mm) | 9.6 (5 ~ 20) | 1.7 (0 ~ 10) | 0.00 |
| Tibial bone loss(mm) | 5.5 (0 ~ 10) | 1 (0 ~ 5) | 0.00 |
| TTO surgery | 4/22 | 0/20 | 0.04 |
| Second-stage operation time(min) | 119 (75~150) | 98 (65~135) | 0.00 |
| Operation bleeding volume | 439 (250~650) | 358 (150~600) | 0.02 |
| Preoperative KSS | |||
| Clinical score | 42 ± 5.7 | 40 ± 6.2 | 0.28 |
| Function score | 29 ± 5.7 | 28 ± 5.4 | 0.51 |
| Total score | 71 ± 10.5 | 68 ± 11 | 0.35 |
| Interim KSS | |||
| Clinical score | 60 ± 6.3 | 75 ± 11.5 | 0.00 |
| Function score | 38 ± 3.3 | 42 ± 3.6 | 0.00 |
| Total score | 98 ± 8.7 | 117 ± 14.4 | 0.00 |
| Postoperative KSS | |||
| Clinical score | 73 ± 5.8 | 82 ± 3.9 | 0.00 |
| Function score | 42 ± 4.6 | 49 ± 5.0 | 0.00 |
| Total score | 115 ± 9.9 | 131 ± 8.9 | 0.00 |
| Mean ROM (degree) | |||
| Preoperative ROM | 71 (30~110) | 73 (23~105) | 0.74 |
| Interim ROM | 1 (0 ~ 8) | 88 (80~100) | 0.00 |
| Postoperation ROM | 80 (70~110) | 94 (80~115) | 0.00 |
| Serious joint mobility disorder | 5/22 | 4/20 | 0.83 |
| Reinfection rate | 1/22 | 1/20 | 0.95 |
| Satisfaction rate | 12/22 | 18/20 | 0.01 |
TTO: tibial tuberosity osteotomy; KSS: knee society score; ROM: range of motion.