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首页> 外文期刊>American Journal of Orthodontics and Dentofacial Orthopedics >Evaluation of friction of conventional and metal-insert ceramic brackets in various bracket-archwire combinations.
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Evaluation of friction of conventional and metal-insert ceramic brackets in various bracket-archwire combinations.

机译：评估各种支架-弓丝组合中的常规和金属插入式陶瓷支架的摩擦力。

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摘要

The purpose of the study was to measure and compare the level of frictional resistance generated between conventional ceramic brackets (Transcend Series 6000, 3M Unitek, Monrovia, Calif), ceramic brackets with stainless steel slot (Clarity, 3M Unitek), conventional stainless steel brackets (Victory Series, 3M Unitek), and 3 different orthodontic wire alloys: stainless steel (stainless steel, SDS Ormco, Glendora, Calif), nickel-titanium (Ni-Ti, SDS Ormco), and beta-titanium (TMA, SDS Ormco). All brackets had a 0.022-in slot, and orthodontic wire alloys were tested in 3 different sections: 0.016 in, 0.017 x 0.025 in, and 0.019 x 0.025 in. Each of the 27 bracket-archwire combinations was tested 10 times, and each test was performed with a new bracket-wire sample. Static and kinetic friction were measured on a specially designed apparatus. All data were statistically analyzed (analysis of variance and Scheffe for the bracket effect, Kruskal-Wallis and Mann Whitney for the alloy and section effects). Metal-insert ceramic brackets generated significantly lower frictional forces than did conventional ceramic brackets, but higher values than stainless steel brackets, in agreement with the findings of the few previous reports. Beta-titanium archwires had higher frictional resistances than did stainless steel and nickel-titanium archwires. No significant differences were found between stainless steel and nickel-titanium archwires. All the brackets showed higher static and kinetic frictional forces as the wire size increased. Metal-insert ceramic brackets are not only visually pleasing, but also a valuable alternative to conventional stainless steel brackets in patients with esthetic demands.
机译：该研究的目的是测量和比较常规陶瓷支架（Transcend Series 6000、3M Unitek，Monrovia，CA），带有不锈钢槽的陶瓷支架（Clarity，3M Unitek），常规不锈钢支架之间产生的摩擦阻力水平。 （胜利系列，3M Unitek）和三种不同的正畸丝合金：不锈钢（不锈钢，SDS Ormco，Glendora，加利福尼亚），镍钛合金（Ni-Ti，SDS Ormco）和β-钛合金（TMA，SDS Ormco） ）。所有支架都有一个0.022英寸的槽口，正畸钢丝合金在3个不同的部分中进行了测试：0.016英寸，0.017 x 0.025英寸和0.019 x 0.025英寸。27种支架-弓丝组合中的每一个均进行了10次测试，每种测试用新的支架线样品进行。在专门设计的设备上测量静摩擦和动摩擦。对所有数据进行统计分析（方括号效应的方差和Scheffe分析，合金和截面效应的Kruskal-Wallis和Mann Whitney分析）。金属插入式陶瓷支架产生的摩擦力比传统陶瓷支架低得多，但比不锈钢支架高，与以前的报告结果一致。 β-钛弓丝比不锈钢和镍-钛弓丝具有更高的摩擦阻力。不锈钢和镍钛弓丝之间没有发现显着差异。随着线径的增加，所有的支架都表现出更高的静摩擦力和动摩擦力。金属插入式陶瓷支架不仅美观，而且对于有审美要求的患者来说，是传统不锈钢支架的宝贵替代品。

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