Int J Oral Maxillofac Implants. 2024 Oct 16;39(5):183-192. doi: 10.11607/jomi.10789.
To determine the change in the sagittal and vertical position of mini-implants placed in the maxilla during distal movement of the entire maxillary dentition.
Overall, 28 mini-implants (1 placed on each side in 14 patients) were evaluated in healthy patients aged 15 to 25 years old. CBCTs were taken immediately after leveling and aligning prior to distalization (T1) and after 6 months (T2) to evaluate the distal movement of the maxillary teeth and position of the mini-implants. The vertical and sagittal angulation of each mini-implant was measured at T1 and T2. The linear distance between the mini-implant and the alveolar crest, the maxillary sinus, the maxillary second premolar, and the maxillary first permanent molar were measured. The change in angulation and the linear displacement of the miniimplant were evaluated in the vertical and sagittal plane. Wilcoxon signed rank test was performed to determine if there was a statistically significant change in the position of the mini-implant.
Vertically, there was a significant change in the linear distance between the mini-implant and the alveolar crest on the right side (P ≤ .006) as well as the miniimplant and the maxillary sinus on the left side (P ≤ .003). Sagittally, there was a statistically significant rotation of the miniimplant occlusally (left side P ≤ .004 and right side P ≤ .002). The head and tip of the mini-implant were displaced toward the maxillary second premolar and away from the maxillary first permanent molar, respectively. There was a significant relative displacement of the mini-implant anteriorly away from the maxillary first permanent molar (left side P ≤ .026 and right side P ≤ .041) and closer to the maxillary second premolar (left side: P ≤ .011 and right side: P ≤ .002).
There was a statistically and clinically significant rotation of the mini-implant in the vertical and sagittal direction during distal movement of the entire maxillary arch. The linear displacement of the mini-implant was more pronounced in the sagittal direction than the vertical direction.
确定在上颌牙齿远移过程中，上颌内微型种植体的矢状和垂直位置的变化。
共评估了 14 名 15 至 25 岁健康患者的 28 个微型种植体（每侧各 1 个）。在整平并排齐上颌牙齿后，即远移前（T1）和 6 个月后（T2）立即拍摄 CBCT，以评估上颌牙齿的远移和微型种植体的位置。在 T1 和 T2 时测量每个微型种植体的垂直和矢状角度。测量微型种植体与牙槽嵴、上颌窦、上颌第二前磨牙和上颌第一恒磨牙之间的线性距离。评估微型种植体在垂直和矢状平面上的角度变化和线性位移。采用 Wilcoxon 符号秩检验确定微型种植体位置是否有统计学显著变化。
垂直方向，右侧微型种植体与牙槽嵴之间的线性距离（P ≤.006）以及左侧微型种植体与上颌窦之间的线性距离（P ≤.003）有显著变化。矢状方向，微型种植体的牙合向旋转有统计学显著意义（左侧 P ≤.004，右侧 P ≤.002）。微型种植体的头部和尖端向远中方向移动，远离上颌第一恒磨牙，向近中方向移动，靠近上颌第二前磨牙。微型种植体从前向后有明显的相对位移，远离上颌第一恒磨牙（左侧 P ≤.026，右侧 P ≤.041），靠近上颌第二前磨牙（左侧 P ≤.011，右侧 P ≤.002）。
在上颌牙弓整体远移过程中，微型种植体在垂直和矢状方向上有统计学和临床显著的旋转。微型种植体的线性位移在矢状方向上比垂直方向更明显。
