阅读说明：本技术 正畸扩张器 (Orthodontic dilator ) 是由 加布里埃莱·斯科梅格纳 毛里齐奥·多尔菲 于 2020-03-12 设计创作，主要内容包括：正畸扩张器包括设置有沿预定扩张方向(d)定向的通孔(10)的左本体(1)和右本体(2)、插入所述孔(10)中的引导件(4)对以及弹性推力装置(M),所述弹性推力装置(M)预加载并作用在所述本体(1,2)之间,以在背离所述本体(1,2)移动的定向上提供指向所述扩张方向的推力。引导件(4)和本体(1,2)具有相互接合的各自表面(42,14)以限制弹性装置(M)的扩张,将所述滑动限制到最大预定滑动值,使得所述推力装置(M)的预加载在此最大预定滑动值下大于零,使得由所述弹性装置(M)施加的推力在所述最大预定滑动值下大于零。(Orthodontic expander comprising a left body (1) and a right body (2) provided with through holes (10) oriented along a predetermined expansion direction (d), a pair of guides (4) inserted in said holes (10), and elastic thrust means (M) preloaded and acting between said bodies (1, 2) to provide a thrust directed towards said expansion direction in an orientation moving away from said bodies (1, 2). The guide (4) and the bodies (1, 2) have respective surfaces (42, 14) mutually engaged to limit the expansion of the elastic means (M), limiting said sliding to a maximum predetermined sliding value, so that the preload of said thrust means (M) is greater than zero at this maximum predetermined sliding value, so that the thrust exerted by said elastic means (M) is greater than zero at said maximum predetermined sliding value.)