Sung S J, Baik H S
Department of Orthodontics, College of Dentistry, Yonsei University, Seoul, Korea.
Am J Orthod Dentofacial Orthop. 1998 Nov;114(5):492-502. doi: 10.1016/s0889-5406(98)70168-4.
To further evaluate the effect of maxillary protraction on facial growth, cephalometric changes in 129 subjects with conditions diagnosed as skeletal Class III malocclusion and who had been treated with maxillary protraction were compared to 9 male and 12 female subjects with annual cephalometric records from the Yonsei growth study sample. The control subjects had Angle Class I malocclusions with normal overjet and overbite. More maxillary forward displacement and mandibular growth inhibition were observed in the protraction group during treatment, and the difference from the untreated controls was statistically significant. When changes due to treatment according to ages were compared, there was no statistical difference. The direction of maxillary growth was similar in the untreated and protraction groups. Maxillary protraction had a growth-stimulating effect on the maxilla during the treatment period.
为进一步评估上颌前牵引对面部生长的影响，将129例诊断为骨性Ⅲ类错牙合且接受过上颌前牵引治疗的患者的头影测量变化，与9例男性和12例女性的头影测量记录进行比较，这些男女来自延世生长研究样本，每年都有头影测量记录。对照组为安氏Ⅰ类错牙合，覆盖和覆牙合正常。在治疗期间，牵引组观察到更多的上颌向前移位和下颌生长抑制，与未治疗的对照组相比差异有统计学意义。当比较不同年龄治疗引起的变化时，无统计学差异。未治疗组和牵引组上颌生长方向相似。上颌前牵引在治疗期间对上颌有生长刺激作用。
