表 2.
The angular variables pre- and post-treatment in 2 groups (°)
两组矫治前后齿槽裂隙角度变量（°）
| 组别
Group |
例数
n |
P-C1-T | P’-C1’-T’ | （P-T）-（T-T’） | ||||||||
| 矫治前
Before treatment |
矫治后
After treatment |
统计值
Statistic |
矫治前
Before treatment |
矫治后
After treatment |
统计值
Statistic |
矫治前
Before treatment |
矫治后
After treatment |
统计值
Statistic |
||||
| 试验组
Test group |
17 | 103.23± 7.38 | 86.77±5.53 |
t=6.420
P=0.000 |
114.04±7.00 | 110.22±6.25 |
t=1.630
P=0.103 |
56.83±4.23 | 36.59±6.08 |
t=6.080
P=0.000 |
||
| 对照组
Control group |
22 | 116.98±10.17 | 92.77±8.52 |
t=9.990
P=0.000 |
120.76±8.86 | 109.12±7.56 |
t=1.890
P=0.065 |
63.44±7.06 | 42.61±5.82 |
t=9.130
P=0.000 |
||