Raveli Taisa Boamorte, Shintcovsk Ricardo Lima, Knop Luegya Amorim Henriques, Sampaio Luana Paz, Raveli Dirceu Barnabé
Department of Orthodontics, Faculty of Dentistry, São Paulo State University, Araraquara, SP, Brazil.
Case Rep Dent. 2017;2017:4206435. doi: 10.1155/2017/4206435. Epub 2017 Nov 29.
Extraction is very frequent indication in orthodontic planning, especially when there are crowding, biprotrusion, and aesthetically unpleasant profiles. Next to extraction comes space closure, which represents a challenge for orthodontists because of extended treatment time, discomfort created for the patient, tissue tolerance, and stability concerns. When it comes to what mechanics to choose for space closure, loops present two major advantages in relation to sliding mechanics: absence of abrasion and possibility to reach pure dental translation. A case is presented where an adult female patient with early loss of the first lower permanent molars, minor lower crowding, and tooth biprotrusion was treated with upper first bicuspids extraction along with upper and lower space closure done with T-loops to promote best space closure control in order to correct the malocclusion and enhance facial aesthetics.
拔牙是正畸治疗计划中非常常见的指征，尤其是在存在牙列拥挤、双牙前突以及面部美观不佳的情况下。仅次于拔牙的是间隙关闭，这对正畸医生来说是一项挑战，因为治疗时间延长、给患者带来不适、组织耐受性以及稳定性问题。在选择间隙关闭的力学方法时，与滑动力学相比，曲簧具有两个主要优点：没有磨损以及能够实现纯粹的牙齿平移。本文介绍了一个病例，一名成年女性患者，第一恒下磨牙早期缺失，下牙列轻度拥挤且双牙前突，通过拔除上第一双尖牙，并使用T形曲簧进行上下牙列间隙关闭，以更好地控制间隙关闭，从而矫正错牙合畸形并改善面部美观。
