[摘要]目的：探讨Twin-block在骨性Ⅱ类错牙合下颌后缩患儿中的应用效果。方法：选取2019年1月-2021年1月笔者医院接收的84例骨性Ⅱ类错牙合下颌后缩患儿设置为研究对象，按随机抽签法分为对照组、研究组，各42例，对照组采用直丝弓矫治器，研究组采用Twin-block矫治器。比较两组治疗前后咀嚼功能、牙齿咬合力、下颌骨变化、软组织面型变化、上气道矢状径，并统计家属治疗满意度。结果：治疗后，研究组咀嚼功能、牙齿咬合力、下颌骨变化指标、软组织面型变化指标均优于对照组(P<0.05)；治疗后，研究组上气道矢状径高于对照组(P<0.05)；研究组家属治疗满意度(95.24%)明显高于对照组(73.81%)(P<0.05)。结论：Twin-block应用于骨性Ⅱ类错牙合下颌后缩患儿治疗中，能改善咀嚼功能，增强牙齿咬合力，促进下颌骨生长，提高面型美观度，扩大上气道矢状径，利于改善呼吸功能，获得家属对治疗效果的高度评价。

    [关键词]Twin-block；直丝弓矫治器；骨性Ⅱ类错牙合；下颌后缩；软组织面型变化；上气道矢状径

    [中图分类号]R783.5 [文献标志码]A [文章编号]1008-6455(2024)09-0053-05

    Application Effect of Twin-block in Children with Skeletal Class Ⅱ Malocclusion and Mandibular Retraction

    CHEN Jingjing， WANG Mi， LIU Fang， QIAO Zhu， ZHAO Hu

    ( The Second Department of Stomatology， Baoding NO.1 Central Hospital， Baoding 071000， Hebei， China )

    Abstract： Objective To explore the application effect of Twin-block in children with skeletal Class Ⅱ malocclusion and mandibular retraction. Methods During the period from January 2019 to January 2021， 84 children with skeletal Class II malocclusion and mandibular retraction received in the author's hospital were set as the research objects. They were randomly divided into the routine group and the research group ......