Chng Chai Kiat, Foong Kelvin, Gandedkar Narayan H, Chan Yiong Huak, Chew Chong-Lin
Department of Craniofacial Dentistry, Division of Plastic, Reconstructive, and Aesthetic Surgery, KK Women's and Children's Hospital, Singapore 229899, Singapore.
Prog Orthod. 2014 May 30;15(1):39. doi: 10.1186/s40510-014-0039-8.
Fiber-reinforced polymer composite (FRPC) archwires could provide an esthetic solution to conventional orthodontic archwires. This study was carried out with the following aims: (1) to compare the sliding friction of FRPC archwire with nickel titanium archwire using various archwire-bracket combinations and (2) to determine the correlation between surface roughness and friction of the FRPC and NiTi archwires.
Four different brackets (Gemini® (Gemini-3M Unitek, St. Paul, MN, USA), ICE® (ICE-Ormco- Orange, CA, USA), Clarity® (Clarity-3M Unitek, St. Paul, MN, USA), and SmartClip® (SmartClip-3M Unitek, St. Paul, MN, USA)) in combination with FRPC wires and NiTi wires (0.018 in) were studied for archwire friction with simulated wear and surface roughness using scanning electron microscope (SEM) and atomic force microscope (AFM), respectively. Statistical analysis of frictional wear generated and surface roughness between the various archwire and bracket groups was evaluated by one-way ANOVA at 5% level. Least significant difference (LSD) multiple comparisons were used to determine the archwire-bracket group difference.
Gemini®-FRPC group generated the highest frictional wear (mean, 313.10; SD, 802.59) and ICE®-FRPC group produced the highest roughness values among all the groups tested (Ra = 496.13 nm, RMS = 635.49 nm). No correlation was found between frictional wear and surface roughness of the archwires of the various groups.
FRPC archwire shows promise in its application as an esthetic aligning archwire. However, further research and refinement in its manufacture would be necessary to fully realize its potential as an esthetic archwire.
纤维增强聚合物复合材料（FRPC）弓丝可为传统正畸弓丝提供美观的解决方案。本研究旨在实现以下目标：（1）使用各种弓丝 - 托槽组合比较FRPC弓丝与镍钛弓丝的滑动摩擦力；（2）确定FRPC弓丝和镍钛弓丝的表面粗糙度与摩擦力之间的相关性。
分别使用扫描电子显微镜（SEM）和原子力显微镜（AFM）研究了四种不同的托槽（Gemini®（Gemini - 3M Unitek，美国明尼苏达州圣保罗）、ICE®（ICE - Ormco - 美国加利福尼亚州奥兰治）、Clarity®（Clarity - 3M Unitek，美国明尼苏达州圣保罗）和SmartClip®（SmartClip - 3M Unitek，美国明尼苏达州圣保罗））与FRPC弓丝和镍钛弓丝（0.018英寸）组合时的弓丝摩擦力、模拟磨损和表面粗糙度。通过5%水平的单因素方差分析评估各种弓丝和托槽组之间产生的摩擦磨损和表面粗糙度的统计分析。使用最小显著差异（LSD）多重比较来确定弓丝 - 托槽组差异。
在所有测试组中，Gemini® - FRPC组产生的摩擦磨损最高（平均值为313.10；标准差为802.59），ICE® - FRPC组产生的粗糙度值最高（Ra = 496.13 nm，RMS = 635.49 nm）。未发现各组弓丝的摩擦磨损与表面粗糙度之间存在相关性。
FRPC弓丝作为一种美观的正畸弓丝显示出应用前景。然而，要充分实现其作为美观弓丝的潜力，还需要进一步的研究和制造工艺的改进。
