【摘要】 目的 通过三维成像技术探讨种植钉辅助的上颌骨性扩弓治疗后面部软组织的变化特征。方法 选取2023年1月至2024年12月于济南市口腔医院接受正畸诊疗的双侧后牙反合患者20例[平均年龄（19.80±8.05）岁]进行上颌骨性扩弓治疗，将治疗前后的软组织影像进行重叠，采用三维坐标系对骨性扩弓治疗前后面部软组织标志点的坐标位置变化进行测量分析。结果 骨性扩弓可导致鼻翼宽度和鼻基底宽度的增加、鼻基底的前移，以及鼻根的水平向扩宽和前移，但对颧骨、下颌骨体部及颏部软组织无显著影响。A点在治疗后水平向及向下移动增加，但矢状向变化不显著。结论 骨性扩弓对面部软组织的影响主要集中在鼻部和鼻旁区，这为临床医生评估骨性扩弓后面部软组织美学的变化提供了更全面的数据。更多还原

【Abstract】 Objective To investigate the changes in facial soft tissues following miniscrew-assisted maxillary skeletal expansion using three-dimensional imaging technology. Methods A total of 20 patients with bilateral posterior crossbite(mean age [19.80±8.05] years) treated with maxillary skeletal expansion at Jinan Stomatological Hospital(January 2023 to December 2024) were evaluated. Pretreatment and posttreatment soft tissue images were superimposed, and displacement of anatomical landmarks was quantified through coordinate system analysis. Results The results showed that maxillary skeletal expansion led to an increase in alar and nasal base width along with anterior displacement of the nasal base. Concurrent horizontal expansion and anterior displacement were also observed at the nasal root. However, the soft tissue profiles of the zygomatic arch, mandibular body, and chin region exhibited no statistically detectable changes. Point A exhibited increased horizontal and downward movement during expansion, while maintaining positional stability in the sagittal plane. Conclusion Maxillary skeletal expansion primarily induces localized soft tissue adaptation in the nasal complex and paranasal regions. This provides more comprehensive data for clinicians to assess changes in facial soft tissue aesthetics following skeletal expansion.更多还原