双弯曲悬臂梁对称和非对称载荷对前段的影响:体外研究

IF 0.5 Q4 DENTISTRY, ORAL SURGERY & MEDICINE
M. Bilińska, M. Dalstra
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引用次数: 2

摘要

悬臂梁产生静定力系统。在三件式侵入式基础拱中,采用对称悬臂梁和非对称悬臂梁的前段加载可以纠正中线不对称。采用0.017″× 0.025″β -钛悬臂梁三种类型:后倾型(TB)、深弯型(DC)、实用弓型(UA)在模拟上颌前段侵入的压型牙上进行测试。在实验前(T0)和实验后(T1),使用Mimics软件(Materialise, Leuven, Belgium)对对称和非对称悬臂的Typodonts进行口腔内扫描仪(3Shape, TRIOS, Copenhagen, Denmark)扫描。对资料进行定性分析。所有悬臂都产生垂直和水平力。在对称设计下,DC和TB表现为具有后退分量的侵入力,UA表现为侵入和突出分量。不对称悬臂梁引起前节段横向位移。DC产生外侧力,UA产生内侧力,前段移位与使用的构型一致。与DC和UA相比,TB前节的运动较小。对称悬臂结构可以同时实现前段的侵入和后缩或突出。具有横向力的不对称设计在临床上有助于中线差异的矫正。验证了悬臂结构对传递力方向的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The Effect of Symmetric and Asymmetric Loading of Frontal Segment with Two Curved Cantilevers: An In Vitro Study
Cantilevers generate statically determined force systems. The frontal segment loading with symmetric and asymmetric cantilevers in a three-piece intrusion base arch can be used to correct midline asymmetry. Three types of 0.017″ × 0.025″ beta-titanium cantilevers: tip-back (TB), deep curve (DC), utility arch (UA) were tested on typodonts simulating intrusion of the maxillary anterior segment. Typodonts with symmetric and asymmetric cantilevers were scanned with intraoral scanner (3Shape, TRIOS, Copenhagen, Denmark) before (T0) and after (T1) the experiment, scans were superimposed using Mimics software (Materialise, Leuven, Belgium). Data were analysed with qualitative analysis. All cantilevers generated vertical and horizontal forces. For symmetric design, the DC and TB displayed intrusive force with retrusive component, UA intrusion and protrusion. The asymmetric cantilevers produced transverse displacement of anterior segment. DC created lateral, UA medial force, the anterior segment displacement was consistent with the used configuration. The movement of an anterior segment with TB is smaller compared to DC and UA. Symmetric cantilevers configurations can achieve simultaneous intrusion and retrusion or protrusion of the anterior segment. The asymmetric design with transversal force can clinically aid the correction of midline discrepancies. The effect of the cantilever configuration on delivered force direction was confirmed.
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来源期刊
Open Dentistry Journal
Open Dentistry Journal DENTISTRY, ORAL SURGERY & MEDICINE-
CiteScore
2.00
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86
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