不同不锈钢丝在传统托槽中摩擦阻力的比较。
Comparison of Frictional Resistance in Conventional Brackets with Different Stainless Steel Wires.
作者信息
Sunda Sangeeta, Miglani Anil, Kumar Reena R, Panghal Vikram, Khanna Puja, Arora Nishtha
机构信息
Department of Orthodontics and Dentofacial Orthopedics Jan Nayak Ch. Devi Lal Dental College, H. No. 1834, Sec. 16/17, Near DPS Junior Wing School, Hisar-125001, Haryana India, Phone: +918572062957, e-mail:
Department of Orthodontics and Dentofacial Orthopedics, I.T.S Dental College Hospital and Research Centre, Greater Noida Uttar Pradesh, India.
出版信息
J Contemp Dent Pract. 2018 Sep 1;19(9):1135-1139.
AIM
The aim of the study was to evaluate and compare static and kinetic friction of round (0.018") and rectangular (0.019 × 0.025") stainless steel (SS) wires of different brands with conventional preadjusted edgewise brackets.
MATERIALS AND METHODS
Maxillary canine and two bicuspids of 0.022 × 0.028" slot sized MBT prescription (Gemini, 3M Unitek, Monrovia, California) brackets were chosen. The wires selected were 0.018" SS (3M Unitek); 0.018" Australian wire (AJ Wilcock, UK), and 0.019 × 0.025" SS (3M Unitek). The testing was done on Instron 3382. A total of 30 test combinations with three wires were repeated 10 times. The static and kinetic friction was recorded in Newton. The kinetic friction was also recorded in Newton at 3, 5, 7, and 9 mm of movement. One-way analysis of variance (ANOVA) and descriptive statistics were used for comparing the friction. To test the level of significance, multiple comparisons were used within wire in bracket by using post hoc test.
RESULTS
Static friction was found to be greater than kinetic in all wires; 0.018" SS (3M) wire exhibited minimum static and kinetic friction; while 0.019 × 0.025" SS (3M) exhibited maximum static friction. Kinetic friction was similar in both 0.018" AJ Wilcock and 0.019 × 0.025" SS but greater than 0.018" SS (3M).
CONCLUSION
Least static and kinetic friction was exhibited by 0.018" SS (3M). Kinetic friction was similar in both 0.018" AJ Wilcock and 0.019 × 0.025" SS.
CLINICAL SIGNIFICANCE
The study concluded that 0.018" SS (3M) is better for individual canine retraction than the other wires used in the study because it has the least frictional resistance; 0.019 × 0.025" SS (3M) is a better wire for canine retraction than 0.018" AJ Wilcock as we can have a three-dimensional control over tooth movement. When torque control is not a prime requisite, then 0.018" SS (3M) can be used for retraction of incisors instead of 0.018" AJ Wilcock in severely proclined incisor cases.
目的
本研究旨在评估并比较不同品牌的圆形（0.018英寸）和矩形（0.019×0.025英寸）不锈钢（SS）丝与传统预成直丝弓托槽之间的静摩擦力和动摩擦力。
材料与方法
选用上颌尖牙及两颗双尖牙，使用槽沟尺寸为0.022×0.028英寸的MBT处方（Gemini，3M Unitek，蒙罗维亚，加利福尼亚）托槽。所选的钢丝为0.018英寸SS（3M Unitek）；0.018英寸澳大利亚钢丝（AJ Wilcock，英国），以及0.019×0.025英寸SS（3M Unitek）。测试在Instron 3382上进行。总共30种测试组合，每种组合使用三种钢丝，重复10次。静摩擦力和动摩擦力以牛顿为单位记录。动摩擦力也在移动3、5、7和9毫米时以牛顿为单位记录。采用单因素方差分析（ANOVA）和描述性统计来比较摩擦力。为检验显著性水平，通过事后检验在托槽内的钢丝之间进行多重比较。
结果
在所有钢丝中，静摩擦力均大于动摩擦力；0.018英寸SS（3M）钢丝的静摩擦力和动摩擦力最小；而0.019×0.025英寸SS（3M）的静摩擦力最大。0.018英寸AJ Wilcock钢丝和0.019×0.025英寸SS钢丝的动摩擦力相似，但大于0.018英寸SS（3M）钢丝。
结论
0.018英寸SS（3M）钢丝的静摩擦力和动摩擦力最小。0.018英寸AJ Wilcock钢丝和0.019×0.025英寸SS钢丝的动摩擦力相似。
临床意义
本研究得出结论，0.018英寸SS（3M）钢丝在单个尖牙内收方面比本研究中使用的其他钢丝更好，因为它的摩擦阻力最小；0.019×0.025英寸SS（3M）钢丝在尖牙内收方面比0.018英寸AJ Wilcock钢丝更好，因为我们可以对牙齿移动进行三维控制。当扭矩控制不是主要要求时，在严重前倾的切牙病例中，0.018英寸SS（3M）钢丝可用于切牙内收，而不是0.018英寸AJ Wilcock钢丝。
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