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首页> 外文期刊>Journal of Clinical and Diagnostic Research >Comparison of the Load-Deflection Characteristics of Aesthetic and Conventional Super Elastic Ni-Ti Orthodontic Arch Wires in Conventional and Metal-Insert Ceramic Brackets
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Comparison of the Load-Deflection Characteristics of Aesthetic and Conventional Super Elastic Ni-Ti Orthodontic Arch Wires in Conventional and Metal-Insert Ceramic Brackets

机译：常规和金属插入式陶瓷支架中美学和常规超弹性Ni-Ti正畸弓丝的载荷-变形特性比较

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Introduction: Coated arch wires and ceramic brackets have been introduced to improve aesthetics during orthodontic treatment.Aim: The aim of this study was to determine the effects of coating on the physical properties of aesthetic orthodontic wires.Material and Methods: Five round wires (0.016 inch) were obtained from each of three brands: conventional uncoated super elastic Nickel Titanium (Ni-Ti) (Rematitian Lite; Dentaurum, Ispringen, Germany), HUBIT (Teflon Coated, Korea), G&H (Epoxy Coated, Greenwood, Indiana, USA) which belonged to maxillary arch. Two types of standard ceramic brackets (conventional and metal-insert type, Ortho Technology, Tampa, Florida, USA) with the slot size of 0.022×0.028 inches were used. A simulation device was fabricated to resemble a model of human dental arch and each of the specimen was tested in three-point bending test. The test was conducted in the buccolingual plane with crosshead speed of 1mm/minute pressure from metal pole. Each sample was loaded until a deflection of 3.0 mm was produced. The mean values of maximum loading force, unloading force and clinical plateau length were recorded. One-way ANOVA and Tukey tests were used at p<0.05.Results: Uncoated Ni-Ti arch wire showed higher mean values of maximum loading and unloading force than that of coated aesthetic wires similar to ceramic brackets while G&H wire and metal-insert ceramic brackets presented the lowest values. The longest clinical plateau length was observed in G&H wires and metal-insert ceramic bracket.Conclusion: The coating processes for HUBIT (Teflon Coated, Korea), G&H (Epoxy Coated, Greenwood, Indiana, USA) wires might influence bending behaviour which can cause decrease in loading and unloading force.
机译：简介：引入了带涂层的弓丝和陶瓷托槽，以改善正畸治疗过程中的美观性。目的：本研究的目的是确定涂层对正畸美学线的物理性能的影响。材料与方法：五根圆形钢丝（0.016英寸）分别来自以下三个品牌：常规的无涂层超弹性镍钛合金（Ni-Ti）（Rematitian Lite;德国伊特普林根的Dentaurum），HUBIT（韩国的Teflon涂层），G＆H（环氧树脂的涂层，美国印第安纳州的格林伍德） ），属于上颌弓。使用两种类型的标准陶瓷托架（常规和金属插入类型，Ortho Technology，坦帕，佛罗里达州，美国），其狭槽尺寸为0.022×0.028英寸。制造了类似于人牙弓模型的模拟装置，并在三点弯曲测试中测试了每个样本。该测试是在颊舌平面上进行的，十字头速度为1mm / min，距金属极的压力。加载每个样品直到产生3.0mm的挠度。记录最大加载力，卸载力和临床平台长度的平均值。单向方差分析和Tukey试验在p <0.05时进行。结果：未涂覆的Ni-Ti弓形线的最大载荷和卸载力的平均值高于与陶瓷托槽相似的带涂层美学线，而G＆H线和金属插入陶瓷括号中的数值最低。在G＆H导线和金属插入式陶瓷支架中观察到最长的临床平台期结论。结论：HUBIT（韩国特氟隆涂层），G＆H（环氧树脂涂层，Greenwood，印第安纳州，美国）的涂层工艺可能会影响弯曲行为，这可能导致降低装卸力。

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