Perdigão João Paulo Veloso, Lustosa Romulo Maciel, Tolentino Elen de Souza, Iwaki Filho Liogi, Iwaki Lilian Cristina Vessoni
Int J Orthod Milwaukee. 2016 Spring;27(1):37-40.
Revalence of impaction of mandibular permanent second molars is between 0.06 and 2.3 percent. In order to reduce treatment time and complications associated with tooth impaction, intervention should take place once the problem is detected. The usual treatment options consists of surgical exposure, luxation of the impacted tooth, extraction of adjacent third molar, orthodontic treatment, and uprighting with brass wires or mini-screws.
The present paper reports a case of bilateral impaction of mandibular permanent second molars ' (MM2s) treated with extraction of the mandibular third molars (MM3s) and surgical-orthodontic uprighting with the brass wire technique.
The MM3s were removed, and the impacted MM2s were surgically exposed. Brass wire was placed apicaly to the mesial of the MM2 from the lingual tissue out toward the buccal. The lingual end of the wire was bent over the area of contact and twisted with the buccal end Monthly wire tightening gradually moved the MM2s distally and towards the occlusal plane.
Uprighting was achieved in 4-5 months, with discrete pain caused by activation of the wire.
This technique proved to be a simple, low-cost, and quick treatment option for uprighting impacted mandibular permanent second molars.
下颌恒第二磨牙阻生的发生率在0.06%至2.3%之间。为了减少与牙齿阻生相关的治疗时间和并发症,一旦发现问题就应进行干预。通常的治疗选择包括外科暴露、阻生牙松动、拔除相邻的第三磨牙、正畸治疗以及用黄铜丝或微型螺钉直立。
本文报告一例双侧下颌恒第二磨牙(MM2)阻生的病例,采用拔除下颌第三磨牙(MM3)并使用黄铜丝技术进行外科正畸直立治疗。
拔除MM3,外科暴露阻生的MM2。从舌侧组织向颊侧将黄铜丝放置在MM2近中根尖处。钢丝的舌端在接触区域弯曲并与颊端扭转。每月收紧钢丝逐渐将MM2向远中移动并朝向咬合平面。
在4至5个月内实现直立,钢丝激活引起轻微疼痛。
该技术被证明是直立阻生下颌恒第二磨牙的一种简单、低成本且快速的治疗选择。