Vijayalakshmi R Devaki, Nagachandran K S, Kummi Pradeep, Jayakumar P
Department of Orthodontics, Meenakshi Ammal Dental College, Maduravoyal, Chennai-600 095, India.
Indian J Dent Res. 2009 Oct-Dec;20(4):448-52. doi: 10.4103/0970-9290.59450.
This study aims to evaluate and compare the mechanical and metallurgical properties of stainless steel and titanium molybdenum alloy (TMA) archwires, with recently introduced timolium and titanium niobium arch wires.
Archwires were categorized into four groups (group I to IV) with 10 samples in each group. They were evaluated for tensile strength, yield strength, modulus of elasticity, load deflection, frictional properties and weld characteristics.
The results were statistically analyzed using ANOVA test and it indicated that stainless steel has high strength, high stiffness and low friction compared to other arch wires, thereby proving that it is the best choice for both sliding as well as frictionless retraction mechanics. TMA with its high formability, low stiffness and low load deflection property is suited to apply consistent force in malaligned teeth but, high friction limits its use in retraction only with loop mechanics.
Timolium possesses comparatively low stiffness, better strength and behaves as an intermediate between stainless steel and TMA and hence can be tried for almost all clinical situations. Low springback and high formability of titanium-niobium archwire allows creation of finishing bends and thus it can be used as finishing archwire.
本研究旨在评估并比较不锈钢和钛钼合金（TMA）弓丝与最近推出的替莫利姆和钛铌弓丝的力学性能和冶金性能。
弓丝分为四组（I组至IV组），每组10个样本。对它们进行拉伸强度、屈服强度、弹性模量、载荷挠度、摩擦性能和焊接特性评估。
使用方差分析对结果进行统计分析，结果表明，与其他弓丝相比，不锈钢具有高强度、高刚度和低摩擦力，从而证明它是滑动以及无摩擦内收力学的最佳选择。TMA具有高成形性、低刚度和低载荷挠度特性，适合在牙齿排列不齐时施加持续力，但高摩擦力限制了其仅在带圈力学内收中的应用。
替莫利姆具有相对较低的刚度、较好的强度，表现为介于不锈钢和TMA之间的一种材料，因此几乎可用于所有临床情况。钛铌弓丝的低回弹和高成形性允许制作末端弯曲，因此它可用作末端弓丝。
