TITANIUM BASED VARIABLE MODULUS ORTHODONTIC WIRE

理想的正畸钢丝应该表现出生物相容性，蠕动 耐磨性、焊接性、成形性，以及通过适当的处理， 可变弹性模数或弯曲刚度。新型钛基形状 记忆效应合金显示出接近这一理想的前景。基于 钛钼铝和钛钒合金的初步研究 已有研究表明，铝合金的弹性模数在2.5 到9x106psi，在这些系统中可以实现360%的变化。他们的 确保生物相容性，基于钛合金在 整形外科及其形状记忆效应和超弹性的结合 行为，为进一步研究这些属性的特征提供了理由 这两种三元合金中。不含镍的任何有害组织 在对这种元素敏感的人身上观察到的反应将被避免。 为了将这些合金商业化，进一步研究它们之间的关系 正畸应用所需的性能和合金成分 并且需要进行热处理。还必须制定加工程序 用于线材生产。这些合金有望提供显著的 在广泛的正畸程序方面取得了进展，此外还可能 用于普通骨科的有价值的新材料。

An ideal orthodontic wire should exhibit bio-compatibility, creep resistance, weldability, formability and also, by suitable treatment, a variable elastic modulus or flexural stiffness. New titanium based shape memory effect alloys show promise of being close to this ideal. Based on preliminary studies of Titanium-Molybdenum-Aluminum and Titanium-Vanadium- Aluminum alloys, it has been shown that an elastic modulus range from 2.5 to 9 x 106psi, a 360% variation, can be achieved in these systems. Their assured bio-compatibility, based on the performance of titanium alloys in orthopedics, and their combination of shape memory effect and super-elastic behavior, makes a case for further research to characterize the properties of these two ternary alloys. Being Nickel free any of the adverse tissue reactions observed in people sensitive to this element would be avoided. To commercialize these alloys, further research on the relationship between the properties required for orthodontic application and alloy composition and heat treatment is needed. Processing procedures must also be developed for wire production. These alloys are expected to provide a significant advance in a wide range of orthodontic procedures, and in addition could be valuable new materials for general orthopedics.