预测前牙弓尺寸变化的数学几何模型的临床意义。

IF 1.3 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE
Eva Paddenberg-Schubert, Raphael Heiß, Tobias Grünbaum, Peter Proff, Christian Kirschneck
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引用次数: 0

摘要

目的:使用基于三度抛物线的数学几何模型,可以预测个体患者的前牙弓长度(AL)及其在切牙移动后的尺寸变化。虽然该模型已经过验证,但很难在日常正畸中应用。因此,本研究的目的是使用不同的方法修改该模型,以便在日常工作中使用:这项回顾性研究以一个研究集体为基础,该研究集体已在之前进行过描述,包括随机选择的 50 个牙齿铸模和使用固定矫治器进行正畸治疗前(T0)和治疗后(T1)拍摄的侧位头影。我们开发了一个 JAVA 计算机程序(Oracle,奥斯汀,德克萨斯州,美国),用于预测牙弓宽度、深度或门牙倾斜度/位置发生治疗性变化后的 AL 变化,并将牙齿移动的类型考虑在内。在使用计算机程序进行AL计算时,建立了一般规则和提名图,然后进行多元线性回归分析,建立了易于使用的回归方程:JAVA计算机程序可供下载。矢状面变化比横向变化对 AL 的影响更大。门牙突出会增加AL,但也会减少咬合过度。AL的改变程度取决于初始深度、宽度、切牙倾斜度、牙齿移动类型以及切缘与旋转中心之间的距离:结论:计算机程序可精确预测 AL 的个体变化,但耗时较长。本文介绍的回归方程和提名图考虑了度量变量,更易于临床应用,而且与计算机程序计算出的AL值相比,差异微乎其微。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Clinical implications of a mathematical-geometrical model to predict changes in the anterior arch dimension.

Clinical implications of a mathematical-geometrical model to predict changes in the anterior arch dimension.

Purpose: Anterior arch length (AL) and the alterations in its dimension following incisor movements were shown to be predictable for an individual patient using a mathematical-geometrical model based on a third-degree parabola. Although the model has been validated previously, it is hard to apply in daily orthodontic routine. Thus, the aim of this study was to modify the model using different approaches to allow its establishment in daily routine.

Methods: This retrospective study was based on a study collective, which was described previously and consisted of 50 randomly chosen dental casts and lateral cephalograms taken before (T0) and after (T1) orthodontic treatment with fixed appliances. A JAVA computer program (Oracle, Austin, TX, USA) was developed to predict AL changes following therapeutic changes of arch width, depth or incisor inclination/position, taking the type of tooth movement into account. Performing exemplary AL calculations with the computer program, general rules and nomograms were set up, followed by multiple linear regression analyses to establish easy-to-use regression equations.

Results: The JAVA computer program is available for download. Sagittal changes showed more effect on AL than transverse modifications. Protruding incisors increased AL, but also reduced overbite. The extent of alteration in AL depended on the initial depth, width, incisor inclination, tooth movement type and distance between the incisal edge and the centre of rotation.

Conclusions: The computer program precisely predicts individual changes in AL but is time-consuming. The presented regression equations and nomograms, considering metric variables, are easier to apply clinically and the differences compared to the AL calculated by the computer program are negligible.

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来源期刊
CiteScore
3.90
自引率
0.00%
发文量
64
审稿时长
>12 weeks
期刊介绍: The Journal of Orofacial Orthopedics provides orthodontists and dentists who are also actively interested in orthodontics, whether in university clinics or private practice, with highly authoritative and up-to-date information based on experimental and clinical research. The journal is one of the leading publications for the promulgation of the results of original work both in the areas of scientific and clinical orthodontics and related areas. All articles undergo peer review before publication. The German Society of Orthodontics (DGKFO) also publishes in the journal important communications, statements and announcements.
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