A new method for successful indirect bonding in relation to bond strength.

IF 1.3 4区医学 Q4 ENGINEERING, BIOMEDICAL

Biomedical Engineering / Biomedizinische Technik Pub Date : 2022-08-24 Print Date: 2022-10-26 DOI:10.1515/bmt-2022-0147

Thomas Wendl, Christine Bandl, Wolfgang Kern, Brigitte Wendl, Peter Proff

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Abstract

The aim of the work was to develop a new transfer method for indirect bonding of brackets to improve the bond strength by applying a uniform contact pressure over the entire dental arch. This has a great potential to reduce the bracket loss rate during clinical treatment. A suitable shape memory polymer (SMP) was selected and prepared in the chemistry laboratory. This SMP applies a force to the brackets during bonding and thus increases the bond strength by applying uniform contact pressure. Various transfer trays were equipped with SMP platelets and the transfer of brackets from the plaster model to the real human tooth model was performed in vitro. The transfer accuracy and bond strength of the bonded brackets were investigated by 3D-overlay and shear tests, respectively. The transfer accuracy was technique sensitive and showed higher accuracy for the trays with SMPs and self-curing silicones than for the vacuum formed trays with SMPs. The bond strength of the indirectly bonded brackets with SMPs was on average 1-2 MPa higher than the bond strength of the brackets indirectly bonded with a conventional two-layer vacuum formed tray without SMPs. Thus, transfer trays with SMPs can provide a significant improvement in bond strength during indirect bonding after appropriate adjustment.

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一种与粘接强度相关的成功间接粘接新方法。

本研究的目的是开发一种新的托槽间接粘接转移方法，通过在整个牙弓上施加均匀的接触压力来提高粘接强度。这对于降低临床治疗过程中托槽的损失率具有很大的潜力。选择了一种合适的形状记忆聚合物(SMP)，并在化学实验室中进行了制备。这种SMP在粘接过程中对支架施加一个力，从而通过施加均匀的接触压力来增加粘接强度。在各种移植托盘中放置SMP血小板，并在体外将石膏模型的托槽移植到真牙模型中。通过三维叠加试验和剪切试验，分别研究了粘结支架的传递精度和粘结强度。SMPs和自固化有机硅板的传递精度具有技术敏感性，比真空成型SMPs板的传递精度更高。含SMPs间接粘接支架的粘接强度比不含SMPs的传统两层真空成型托盘间接粘接支架的粘接强度平均高1 ~ 2 MPa。因此，经过适当调整后，具有SMPs的转移托盘可以在间接粘接期间显著提高粘接强度。

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

Biomedical Engineering / Biomedizinische Technik 医学-工程：生物医学

CiteScore

3.50

自引率

5.90%

发文量

审稿时长

2-3 weeks

期刊介绍： Biomedical Engineering / Biomedizinische Technik (BMT) is a high-quality forum for the exchange of knowledge in the fields of biomedical engineering, medical information technology and biotechnology/bioengineering. As an established journal with a tradition of more than 60 years, BMT addresses engineers, natural scientists, and clinicians working in research, industry, or clinical practice.