Table 3.
Assessment of pedicle screw placement accuracy and proximal facet joint violations of CBT, TASS, and PS
| Parameters | M-MIDLIF | M-TLIF | |||
|---|---|---|---|---|---|
| Screws | PS | t/Z/X2 | p value | ||
| MCBTS | TASS | ||||
| Screw grade | |||||
| A | 53(94.64%) | 53(94.64%) | 98(87.50%) | 3.514 | 0.173 |
| B | 2(3.57%) | 3(5.36%) | 13(11.61%) | 3.987 | 0.136 |
| C | 1(1.79%) | 0 | 1（0.89%） | 1.000* | |
| D | 0 | 0 | 0 | - | - |
| E | 0 | 0 | 0 | - | - |
| A+B | 55(98.21%) | 56(100%) | 111(99.11%) | 1.000* | |
| C+D+E | 1(1.79%) | 0 | 1(0.47%) | 1.000* | |
| Direction of screw deviation | |||||
| Superior | 0 | 0 | 0 | - | - |
| Inferior | 0 | 0 | 0 | - | - |
| Medial | 0 | 3(100%) | 13(100%) | 12.520 | 0.002* |
| Lateral | 3(100%) | 0 | 0 | 12.520 | 0.002* |
| FJV grade | |||||
| 0 | 54(96.43%) | 48(85.71%) | 3.953 | 0.047 | |
| 1 | 2(3.57%) | 8(14.29%) | 3.953 | 0.047 | |
| 2 | 0 | 0 | - | - | |
| 3 | 0 | 0 | - | - | |
| Fusion rate | |||||
| Interbody fusion rate | 26(92.85%) | 26(92.85%) | 1.000* | ||
| Facet fusion rate | 47(83.92%) | 52(92.85%) | 2.176 | 0.140 | |
*p-value was calculated using Fisher's precision probability test