表 3.
Maximal safe entry angle of sacral screws in experimental group（°）
实验组各例标本最大安全进钉角度（°）
| 标本
Specimen |
前排钉
Anterior screw |
后排钉
Posterior screw |
|||
| 术前测量
Preoperative measurement |
实际测量
Actual measurement |
术前测量
Preoperative measurement |
实际测量
Actual measurement |
||
| 1 | 52.32 | 50.00 | 37.40 | 35.00 | |
| 2 | 51.91 | 45.00 | 36.60 | 30.00 | |
| 3 | 51.23 | 45.00 | 38.50 | 30.00 | |
| 4 | 52.56 | 45.00 | 36.60 | 30.00 | |
| 5 | 52.98 | 40.00 | 36.90 | 30.00 | |
| 6 | 52.67 | 45.00 | 37.80 | 30.00 | |
| 7 | 51.98 | 51.91 | 35.40 | 36.60 | |
| 8 | 52.00 | 40.00 | 36.70 | 30.00 | |
| 9 | 51.34 | 45.00 | 37.00 | 25.00 | |
| 10 | 50.45 | 40.00 | 37.50 | 30.00 | |
| 均值
Mean |
51.93 | 37.04 | |||