Cross-section dimensions and mechanical properties of esthetic orthodontic coated archwires
Cross-section dimensions and mechanical properties of esthetic orthodontic coated archwires
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DOI：
10.1016/j.ajodo.2012.09.009
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发表时间：
2013-04-01
影响因子：
3
通讯作者：
Elias, Carlos Nelson
中科院分区：
文献类型：
--
作者：
da Silva, Dayanne Lopes;Mattos, Claudia Trindade;Elias, Carlos Nelson
前言：美观有效的正畸弓丝的开发和使用一直受到人们的关注。本研究的目的是评估4个品牌的美容涂层焊丝在口腔暴露21d前和21d后的内合金芯尺寸及其力学性能，并与常规不锈钢和镍钛焊丝进行比较。方法：对4组正畸弓丝(加利福尼亚州卡尔斯巴德的Ortho Organers，加利福尼亚州卡尔斯巴德；印第安纳州拉波特的TP Orthodtics；北京的Ortheter，中国；巴西圣保罗的特里亚尼罗，里约克拉罗)进行了测试。评估了五种性能：内丝尺寸、弹性模数、回弹模数、最大挠度和载荷挠度曲线特性。用体视镜对标本的横切面进行成像。使用Image Pro Plus软件(版本4.5；Media Controbernetics，Silver Spring，Md)测量每根钢丝的内部合金芯尺寸。所有试件在万能试验机上进行三点弯曲试验。结果：与对照钢丝相比，Ortho Organers组和Triane iro组涂层钢丝的内芯尺寸缩小幅度更大，加载和卸载力更小，弹性模量值、回弹模数和最大偏转力值也更低。在TP正畸组和正畸组中，涂层钢丝的内合金芯尺寸和力学性能与对照钢丝几乎没有差别。结论：减少合金内芯尺寸以补偿涂层厚度似乎是美观涂层钢丝力学性能变化较大的原因。(Am J Orthod DentofaceOrthop 2013；143：S85-91)
Introduction: There has been continuing interest in the development and use of esthetic and effective orthodontic archwires. The aims of this study were to evaluate the inner alloy core dimensions of 4 brands of as-received esthetic coated wires and their mechanical properties before and after 21 days of oral exposure, compared with conventional stainless steel and nickel titanium wires. Methods: Four groups (Ortho Organizers, Carlsbad, Calif; TP Orthodontics, LaPorte, Ind; Orthometric, Beijing, China; and Trianeiro, Rio Claro, Sao Paulo, Brazil) of orthodontic archwires were tested. Five properties were evaluated: inner wire dimensions, modulus of elasticity, modulus of resilience, maximum deflection force, and load deflection curve characteristics. Images of the transverse sections from the specimens were made with a stereoscope. The inner alloy core dimensions of each wire were measured by using Image Pro Plus software (version 4.5; Media Cybernetics, Silver Spring, Md). All specimens were tested in a universal testing machine in a 3-point bending test. Results: Coated wires of the Ortho Organizers and Trianeiro groups showed greater reductions in their inner alloy core dimensions and produced lower loading and unloading forces and lower modulus of elasticity, modulus of resilience, and maximum deflection force values than did their control wires. Inner alloy core dimensions and the mechanical behavior of coated wires practically did not differ from the control wires in the TP Orthodontics and Orthometric groups. Conclusions: The reduction on the inner alloy core dimensions to compensate for the coating thickness seems to be the variable responsible for greater changes in the mechanical properties of esthetic coated wires. (Am J Orthod Dentofacial Orthop 2013;143:S85-91)