Color stability of laboratory glass-fiber-reinforced plastics for esthetic orthodontic wires
Color stability of laboratory glass-fiber-reinforced plastics for esthetic orthodontic wires
复制标题
DOI：
10.4041/kjod.2015.45.3.130
复制
发表时间：
2015-05-01
影响因子：
1.9
通讯作者：
Kasai, Kazutaka
中科院分区：
文献类型：
--
作者：
Inami, Toshihiro;Tanimoto, Yasuhiro;Kasai, Kazutaka
目的：本研究将聚碳酸酯与玻璃纤维复合制备玻璃纤维增强塑料（gfrp）用于拉氏正畸金属丝。这些实验室GFRP钢丝比市售的镍钛钢丝更透明；然而，对GFRP在正畸治疗中的颜色稳定性进行研究是必要的。因此，在本研究中，使用色度来评估GFRP的颜色稳定性。方法：采用拉挤法制备GFRP美观圆丝（直径：0.45 mm[0.018英寸]）。为了研究纤维增强材料直径对颜色稳定性的影响，采用13 μ m （GFRP-13）或7 μ m玻璃纤维（GFRP-7）制备了gfrp。用比色法测定了在37℃下咖啡浸泡24小时、1周、2周和4周后gfrp的颜色变化。我们通过色差（Delta E*）和国家标准局（NBS）两个评价单位来评价gfrp的颜色稳定性。结果：两种GFRPs浸泡后几乎没有明显的颜色变化。根据比色法测量，GFRP-13和GFRP-7的δ E*值分别为0.73-1.16和0.62-1.10，按照NBS单位，两种gfrp均呈现“轻微”颜色变化。因此，GFRP-13和GFRP-7的Delta E*值和NBS单位没有显著差异。此外，对于两种gfrp，在任何浸泡期间都没有观察到显著差异。结论：GFRPs在正畸治疗过程中具有较高的颜色稳定性，是一种有吸引力的美观正畸金属丝。
Objective: In our previous study, glass-fiber-reinforced plastics (GFRPs) made from polycarbonate and glass fibers were prepared for esthetic orthodontic wires using pultrusian. These laboratory GFRP wires are more transparent than the commercially available nickel-titanium wire; however, an investigation of the color stability of GFRP during orthodontic treatment is needed. Accordingly, in the present study, the color stability of GFRP was assessed using colorimetiy. Methods: Preparation of GFRP esthetic round wires (diameter: 0.45 mm [0.018 inch]) using pultrusion was described previously. Here, to investigate how the diameter of fiber reinforcement affects color stability, GFRPs were prepared by incorporating either 13-mu m (GFRP-13) or 7-mu m glass (GFRP-7) fibers. The color changes of GFRPs after 24 h, and following 1, 2, and 4 weeks of coffee immersion at 37 degrees C, were measured by colorimetry. We evaluated the color stability of GFRPs by two evaluating units: the color difference (Delta E*) and National Bureau of Standards (NBS). Results: After immersion, both GFRPs showed almost no visible color change. According to the colorimetry measurements, the Delta E* values of GFRP-13 and GFRP-7 were 0.73-1.16, and 0.62-1.10, respectively, in accordance with NBS units, both GFRPs showed "slight" color changes. As a result, there were no significant differences in the Delta E* values or NBS units for GFRP-13 or GFRP-7. Moreover, for both GFRPs, no significant differences were observed in any of the immersion periods. Conclusions: Our findings suggest that the GFRPs will maintain high color stability during orthodontic treatment, and are an attractive prospect as esthetic orthodontic wires.