[摘要]目的：探讨超声骨刀减阻术在辅助第一前磨牙拔除术后尖牙远中移动的临床效果。方法：选取2022年5月-2023年12月于新疆医科大学附属口腔医院因单颌或双颌牙列拟拔除第一前磨牙的患者20例。采用自身对照，每个患者上颌左、右侧随机选为实验组和对照组，其中对照组为未行超声骨刀减阻-常规正畸治疗，研究组行超声骨刀减阻术。比较两组尖牙移动距离、牙齿倾斜度、牙槽骨密度、牙齿松动度、根尖吸收、根侧吸收、牙龈状况以及牙髓活力等指标的变化情况。结果：研究组术后14～120 d的尖牙移动距离大于对照组(P<0.05)。两组治疗后牙齿倾斜度明显增加(均P<0.05)，其中研究组治疗后牙齿倾斜度小于对照组，牙槽骨密度明显降低(均P<0.05)；实验组治疗后牙槽骨密度高于对照组，牙齿松动度、根尖吸收以及牙龈状况均明显优于对照组(均P<0.05)。两组根侧吸收、牙髓活力差异无统计学意义(均P>0.05)。结论：超声骨刀减阻术辅助第一前磨牙拔除正畸治疗可加快尖牙远中移动，对尖牙及牙周组织损伤较小，有助于缩短矫治时间，具有良好的临床应用价值。

    [关键词]超声骨刀；第一前磨牙；尖牙远中移动；正畸；骨密度

    [中图分类号]R783.5" " [文献标志码]A" " [文章编号]1008-6455(2025)08-0137-04

    Clinical Effect of Piezosurgery Drag Reduction Surgery in Assisting Canine Distal Movement after Extraction of the First Premolars

    PENG Zaoxia1，2， ZHOU Siying1，2， LI Chunxia1，2， Nazina·MADALI1，2， Haliha·SAILIKEBIEKE1，2

    ( 1.Department of Orthodontics， the First Affilicated Hospital of Xinjiang Medical University， Affiliated Stomatological Hospital， Urumqi 830054， Xinjiang， China; 2.Stomatology Research Institute of Xinjiang Uygur Autonomous Region， Urumqi 830054， Xinjiang， China )

    Abstract： Objective" To study the effect of piezosurgery drag reduction surgery in assisting orthodontic treatment of first molar extraction. Methods" A total of 20 patients planned to have their first premolars extracted due to severe crowding of single or double teeth were selected from May 2022 to November 2023 in the orthodontics department of the affiliated stomatological hospital of Xinjiang medical university. The left and right sides of each subject's upper jaw were randomly selected into the study group and the control group. The control group received conventional orthodontic treatment and the expermential group received piezosurgery drag reduction surgery. The canine movement distance ......