本文的目的是介绍一种改良矫治器——采用弹簧式垫矫治器治疗替牙期伴有吮指习惯的骨性开患者,其不仅抑制了后牙和牙槽骨的垂直生长,而且这种矫治器对破除不良习惯的作用也很明显。材料和方法矫治器由2个部分组成,分别为延伸至面的下颌可摘式基托和与下颌基托有 The purpose of this article is to introduce an improved appliance that uses a spring-loaded ottoman appliance to treat bony open jaws with sucking habit on tooth period that not only inhibits the vertical growth of the posterior teeth and alveolar bone but also The effect of this appliance on breaking bad habits is also obvious. Materials and methods appliance consists of two parts, respectively, extending to the jaw of the jaw removable base and the base with the mandibular