使用涂层丝在整平阶段的摩擦力与正畸力之间的关系。
Relationship between friction force and orthodontic force at the leveling stage using a coated wire.
机构信息
Nihon University School of Dentistry, Department of Orthodontics, Tokyo, Japan.
Nihon University School of Dentistry, Dental Research Center, Department of Orthodontics, Division of Clinical Research, Tokyo, Japan.
出版信息
J Appl Oral Sci. 2013 Nov-Dec;21(6):554-9. doi: 10.1590/1679-775720130325.
UNLABELLED
The relationship between orthodontic force and friction produced from an archwire and brackets affects the sliding of the wire in the leveling stage.
OBJECTIVE
The purpose of this study was to evaluate the relationship between force and friction in a small esthetic nickel-titanium (Ni-Ti) wire.
MATERIAL AND METHODS
Five esthetic wires (three coated and two plated) and two small, plain Ni-Ti wires (0.012 and 0.014 inches) were used. We performed a three-point bending test according to ISO 15841 and the drawing test with a dental arch model designed with upper linguoversion of the lateral incisor in the arch (displacements of 0.5, 1.0, 2.0 and 3.0 mm), and evaluated the relationship between them.
RESULTS
Unloading bending forces of all wires at displacements of less than 1.0 mm were larger than friction forces, but all friction forces at displacements exceeding 2.0 mm were larger than unloading bending forces. The arch likely expands when displacement from the proximal brackets exceeds 1.0 mm. The friction force of a martensite 0.014-inch Ni-Ti wire was significantly greater than those of the other esthetic and austenitic wires.
CONCLUSIONS
A wire with the smallest possible friction force should be used in cases with more than 1.0 mm displacement.
未加标签
正畸力与弓丝和托槽之间产生的摩擦力之间的关系会影响弓丝在平动阶段的滑动。
目的
本研究的目的是评估小尺寸美观型镍钛（Ni-Ti）弓丝的力与摩擦力之间的关系。
材料和方法
使用了 5 种美观型弓丝（3 种涂层和 2 种镀层）和 2 种小尺寸、普通 Ni-Ti 弓丝（0.012 和 0.014 英寸）。我们根据 ISO 15841 进行了三点弯曲试验和带有牙弓模型的拉伸试验，该模型设计为在上侧切牙的舌倾位置（位移为 0.5、1.0、2.0 和 3.0 mm），并评估了它们之间的关系。
结果
所有弓丝在位移小于 1.0 mm 时的卸载弯曲力均大于摩擦力，但所有在位移超过 2.0 mm 时的摩擦力均大于卸载弯曲力。当从近中托槽的位移超过 1.0 mm 时，牙弓可能会扩张。马氏体 0.014 英寸 Ni-Ti 弓丝的摩擦力显著大于其他美观型和奥氏体弓丝。
结论
在位移超过 1.0 mm 的情况下，应使用摩擦力尽可能小的弓丝。
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