Department of Orthodontics, Gazi University, Ankara, Turkey.
Eur J Orthod. 2010 Aug;32(4):425-9. doi: 10.1093/ejo/cjp120. Epub 2010 Jan 6.
The purpose of this study was to evaluate changes in dentofacial growth before, during, and after use of a magnetic activator device (MAD) II in high-angle Class II division 1 patients. Lateral cephalometric and hand-wrist radiographs of 10 patients (six girls and four boys) with an average chronological age of 10 years 5 months were obtained at the beginning of the observation period (T1, 9.5 months), beginning of MAD II application (T2), at the end of the treatment (T3), and approximately 4 years after the end of treatment (T4). Thirteen linear, 1 ratio, and 10 angular measurements were evaluated. Paired t-tests were used for statistical evaluation of differences that occurred between the time points. The increase in gonial angle, GnGoAr angle, S-N, Co-Gn, Go-Ar, ANS-Me, S-Go, and N-Me distances and the decrease of overjet, U1-NA distance, and ANB angle were statistically significant during the treatment. At T4, there was a decrease in gonial angle and U1-NA distance, which was significant. The changes as a result of treatment were stable at T4.
本研究旨在评估使用磁力激活器（MAD）II 前后高角安氏Ⅱ类 1 分类患者的牙颌面生长变化。共纳入 10 名患者（6 名女孩和 4 名男孩），平均年龄为 10 岁 5 个月，在观察期开始时（T1，9.5 个月）、MAD II 应用开始时（T2）、治疗结束时（T3）和治疗结束后约 4 年（T4）时分别拍摄了侧位头颅侧位片和腕骨 X 线片。共评估了 13 项线性、1 项比例和 10 项角度测量值。采用配对 t 检验评估各时间点的差异。在治疗过程中，下颌角、下齿槽座角、S-N、Co-Gn、Go-Ar、ANS-Me、S-Go 和 N-Me 距离增加，覆盖增加，U1-NA 距离和 ANB 角减小，差异具有统计学意义。在 T4 时，下颌角和 U1-NA 距离减小，差异具有统计学意义。治疗后的变化在 T4 时是稳定的。
