表 1.
单次扩弓组和反复扩缩组患者基本情况和基线资料比较
Comparisons of the demographic data and baseline data between the RPE and RPE/C group at T0
| Items | RPE group | RPE/C group | P value |
| RPE, rapid palatal expansion group; RPE/C, alternating rapid palatal expansion and constriction group; CRP, coronal reference plane; HRP, horizontal reference plane; A-CRP, the sagittal distance of point A to CRP; A-HRP, the vertical distance of point A to HRP; ZTM-CRP, the average sagittal distance of the middle point of zygomaticotemporal suture to CRP; ZTM-HRP, the average vertical distance of the middle point of zygomaticotemporal suture to HRP; ZTM width, the transverse distance between bilateral middle points of zygomaticotemporal sutures; ZMM-CRP, the average sagittal distance of the middle point of zygomaticomaxillary suture to CRP; ZMM-HRP, the average vertical distance of the middle point of zygomaticomaxillary suture to HRP; ZMM width, the transverse distance between bilateral middle points of zygomaticomaxillary sutures; ZFM-CRP, the average sagittal distance of the middle point of zygomaticofrontal suture to CRP; ZFM-HRP, the average vertical distance of the middle point of zygomaticofrontal suture to HRP; ZFM width, the transverse distance between bilateral middle points of zygomaticofrontal sutures; T0, before treatment. | |||
| Gender (female/male) | 11/7 | 10/6 | 0.934 |
| Zygomaticomaxillary suture maturational stages (B/C) | 9/9 | 8/8 | >0.999 |
| Age/years, x±s | 9.80±1.31 | 10.27±1.56 | 0.342 |
| A-CRP/mm, x±s | 75.30±4.00 | 76.99±4.64 | 0.264 |
| A-HRP/mm, x±s | -27.22±2.51 | -27.15±3.36 | 0.943 |
| ZTM-CRP/mm, x±s | 41.31±2.16 | 41.49±2.64 | 0.827 |
| ZTM-HRP/mm, x±s | -2.83±1.23 | -2.16±1.89 | 0.237 |
| ZTM width/mm, x±s | 109.84±6.11 | 109.83±4.57 | 0.995 |
| ZMM-CRP/mm, x±s | 64.09±2.89 | 64.65±3.79 | 0.625 |
| ZMM-HRP/mm, x±s | -9.76±1.59 | -9.24±1.89 | 0.394 |
| ZMM width/mm, x±s | 67.05±3.81 | 68.04±3.60 | 0.444 |
| ZFM-CRP/mm, x±s | 62.20±3.15 | 62.46±3.00 | 0.804 |
| ZFM-HRP/mm, x±s | 23.12±1.93 | 23.47±2.22 | 0.628 |
| ZFM width/mm, x±s | 93.28±5.25 | 92.81±3.96 | 0.770 |
| Protraction time/month, x±s | 8.84±4.19 | 8.45±2.76 | 0.750 |
| Total treatment time/month, x±s | 9.57±4.17 | 10.95±2.82 | 0.262 |