Evaluation of force systems generated by Memory Titanol® springs with different preactivation bends.

Q2 Medicine
Dental Press Journal of Orthodontics Pub Date : 2024-10-04 eCollection Date: 2024-01-01 DOI:10.1590/2177-6709.29.5.e242430.oar
Henrique Barcelos Brandão, Jonas Bianchi, Lucas Arrais de Campos, Alyssa Schiavon Gandini, Luiz Gonzaga Gandini Junior
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Abstract

Objective: This study evaluated the force system generated by the Memory Titanol® spring (MTS) with different preactivation bends using an orthodontic force tester (OFT).

Methods: Three preactivations were tested using a 0.017 × 0.022-in stainless steel (SS) wire and a 0.018 × 0.025-in NiTi segment, with an activation of 30º in the posterior segment (β), with 0º (Group 1 [G1]), 45º (Group 2 [G2]), and 60º (Group 3 [G3]) in the anterior segment (α).

Results: The molars showed extrusion values of -1.33 N for G1 and -0.78 N for G2, and an intrusion value of 0.33 N for G3. The force in the premolars was intrusive with a variation of 1.34 N for G1 and 0.77 N for G2; and extrusive with a variation of -0.31 N for G3. Regarding the upright moment (Ty) of the molar, a distal moment was observed with values of 53.45 N.mm for G1 and 19.87 N.mm for G2, while G3 presented a mesial moment of -6.23 N.mm. G1, G2, and G3 all exhibited distal premolar moments (Ty) of 3.58, 2.45, and 0.68 N.mm, respectively.

Conclusions: The tested preactivations exerted an extrusive force in G1 and G2 and an intrusive force in G3 during molar vertical movement. The premolar region in G1 and G2 showed intrusive force and distal moment.

对具有不同预激活弯曲度的记忆钛诺®弹簧所产生的力系统进行评估。
目的:本研究使用正畸力测试仪(OFT)评估了不同预激活弯曲度的记忆钛醇®弹簧(MTS)产生的力系统:本研究使用正畸力测试仪(OFT)评估了记忆钛诺®弹簧(MTS)在不同预激活弯度下产生的力系统:方法: 使用 0.017 × 0.022 英寸的不锈钢(SS)钢丝和 0.018 × 0.025 英寸的镍钛段测试了三种预激活方式,后段(β)激活为 30º,前段(α)激活为 0º(第 1 组 [G1])、45º(第 2 组 [G2])和 60º(第 3 组 [G3]):臼齿的挤出值为-1.33牛顿(G1)和-0.78牛顿(G2),内挤值为0.33牛顿(G3)。G1 和 G2 的前臼齿力分别为 1.34 N 和 0.77 N;G3 的前臼齿力为-0.31 N。关于臼齿的直立力矩(Ty),G1 和 G2 的远端力矩值分别为 53.45 N.mm和 19.87 N.mm,而 G3 的中端力矩值为-6.23 N.mm。G1、G2 和 G3 的远端前磨牙力矩(Ty)分别为 3.58、2.45 和 0.68 牛.毫米:结论:在臼齿垂直移动过程中,测试的预激活装置在 G1 和 G2 中产生了挤出力,在 G3 中产生了挤入力。G1 和 G2 的前磨牙区域显示出侵入力和远端力矩。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Dental Press Journal of Orthodontics
Dental Press Journal of Orthodontics Dentistry-Orthodontics
CiteScore
2.00
自引率
0.00%
发文量
40
审稿时长
27 weeks
期刊介绍: The Dental Press Journal of Orthodontics publishes scientific research articles, significant reviews, clinical and technical case reports, brief communications, and other materials related to Orthodontics and Facial Orthopedics.
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