In vitro assessment of shape memory effect and pseudoelastic response of smarter alloy shape memory alloy orthodontic archwire

智能合金形状记忆合金正畸弓丝形状记忆效应和伪弹性响应的体外评估

• 批准号: 514534-2017
• 负责人: Carey, Jason
• 金额: $ 1.17万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=618350
• 关键词: vitro; assessment; shape; memory; effect

As Canadians continue to place added significance on their oral health, research in this area has becomeincreasingly important. One key area of interest is orthodontic treatment. In orthodontic treatment using braces,the archwire is the key element that delivers loads to teeth through brackets which are attached to the tooth. Assuch, research into the biomechanics of archwires is imperative in the understanding of how applied loadseffect tooth movement throughout treatment. Smarter Alloys Inc. has developed a process by which they alterthe local material characteristics of nickel-titanium based shape memory alloy (SMA) archwires. This allowsclinicians the option of variable stiffness around an archwire, thereby facilitating tooth movement in certainregions while preventing it in others. The Orthodontic Biomechanics Testing and Development Group at theUniversity of Alberta has a suite of experimental simulation equipment to study the biomechanics oforthodontic appliances. They allow for the study of rotational mechanics between a single bracket andarchwire, the friction between a bracket and archwire as they slide relative to one another, and the propagationof loads around the arch. These pieces of equipment will be utilized to measure the loads generated byprocessed archwires using Smarter Alloys techniques as well as conventional SMA archwires. Experimentalfindings will elucidate how processing of SMA archwires influences their interactions with brackets and howthese processed archwires compare to those typically used in orthodontic treatment. This work will provideSmarter Alloys with valuable information allowing for the improvement of their product as well assignificantly contribute to the study of orthodontic biomechanics on the whole.

随着加拿大人继续重视口腔健康，这一领域的研究变得越来越重要。人们感兴趣的一个关键领域是正畸治疗。在使用牙套的正畸治疗中，弓丝是通过附着在牙齿上的托槽向牙齿传递负载的关键元件。因此，对弓丝生物力学的研究对于了解所施加的载荷如何影响整个治疗过程中的牙齿移动至关重要。 Smarter Alloys Inc. 开发了一种工艺，可改变镍钛基形状记忆合金 (SMA) 弓丝的局部材料特性。这使得临床医生可以选择弓丝周围的可变刚度，从而促进某些区域的牙齿移动，同时防止其他区域的牙齿移动。阿尔伯塔大学正畸生物力学测试和开发小组拥有一套实验模拟设备来研究正畸矫治器的生物力学。它们可以研究单个托槽和弓丝之间的旋转力学、托槽和弓丝相对滑动时的摩擦力，以及弓形周围的载荷传播。这些设备将用于测量使用 Smarter Alloys 技术加工的弓丝以及传统 SMA 弓丝产生的负载。实验结果将阐明 SMA 弓丝的加工如何影响其与托槽的相互作用，以及这些加工后的弓丝与正畸治疗中通常使用的弓丝相比如何。这项工作将为 Smarter Alloys 提供有价值的信息，从而改进其产品，并对整个正畸生物力学的研究做出重大贡献。