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首页> 外文期刊>The Journal of Prosthetic Dentistry >Influence of fiber type and wetting agent on the flexural properties of an indirect fiber reinforced composite.
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Influence of fiber type and wetting agent on the flexural properties of an indirect fiber reinforced composite.

机译：纤维类型和润湿剂对间接纤维增强复合材料弯曲性能的影响。

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Statement of Problem. Different fiber types are available for reinforcing composite restorations. Little information exists regarding optimal fiber type/bonding agent combinations. Purpose. This in vitro study examined the influence of storage time and 2 fiber wetting agents on the flexural properties of an indirect dental composite reinforced by 3 fiber types. Material and Methods. Three types of fiber (ultra-high molecular weight polyethylene, Kevlar, and Glass fiber) were used to reinforce samples of an indirect composite (Artglass) prepared to test flexural properties. Each fiber type was used to prepare 3 groups of 10 specimens after fiber wetting with an unfilled or a filled resin bonding agent. All fibers were weighed to an accuracy of 0.01 mg to standardize the amount of fiber placed in the base (tensile side) of the specimen preparation mold (2 x 2 x 25 mm). Fiber-reinforced samples wetted with the unfilled resin were stored for 24 hours before flexural testing, whereas separate groups of fiber-reinforced samples wetted with the filled resin were tested after both 24 hours and 6 months storage in water at 37 degrees C. Two additional groups of unreinforced composite control specimens (10 samples per group) were prepared, one for each of the 2 storage times, resulting in 11 groups total. Mean flexural strengths (MPa) and flexural modulus (GPa) values were determined in a 3-point bend test at a crosshead speed of 1 mm/min by use of a universal testing machine. Comparisons between means were performed with 2- and 1-way analysis of variance tests (alpha=.01) to demonstrate the influence of storage time, fiber wetting agent, and fiber type on the flexural properties of the indirect dental composite tested. Results. Significant increases (124% to 490%) in mean flexural strength (P<.01) were found for all fiber-reinforced groups in comparison to the unreinforced controls at both storage time intervals. The silane containing unfilled bonding agent gave the greatest reinforcing effect (364%) when used with the glass fiber material. After 6 months storage in water, a significant decline (28%) occurred in the mean flexural strength of the glass fiber-reinforced specimens (P<.01) when the filled bonding agent was used. Conclusion. Within the limitations of this study, the choice of fiber type and wetting agent was shown to have a significant positive influence on the flexural properties of the fiber-reinforced composite. When used with the silane containing unfilled bonding agent, the glass fiber increased the mean flexural strength of the unreinforced indirect composite by 364%.
机译：问题陈述。不同的纤维类型可用于增强复合修复体。关于最佳纤维类型/粘合剂组合的信息很少。目的。这项体外研究检查了储存时间和2种纤维润湿剂对由3种纤维类型增强的间接牙科复合材料的弯曲性能的影响。材料与方法。三种类型的纤维（超高分子量聚乙烯，凯夫拉尔纤维和玻璃纤维）用于增强间接复合材料（Artglass）的样品，以测试其弯曲性能。使用未填充或填充的树脂粘合剂润湿纤维后，每种纤维类型均用于准备3组10个样本。将所有纤维称重至0.01 mg的精度，以标准化放置在样品制备模具的底部（拉伸侧）（2 x 2 x 25 mm）中的纤维量。用未填充树脂润湿的纤维增强样品在弯曲测试前存储24小时，而分别用填充树脂润湿的纤维增强样品在37摄氏度的水中存储24小时和6个月后进行测试。制备了一组非增强复合控制样品（每组10个样品），每2次保存一次，共11组。使用通用试验机在十字头速度为1 mm / min的三点弯曲试验中确定平均弯曲强度（MPa）和弯曲模量（GPa）值。均值之间的比较通过方差检验的2和1方式分析（alpha = .01）进行，以证明储存时间，纤维润湿剂和纤维类型对所测试的间接牙科复合材料的弯曲性能的影响。结果。在两个存储时间间隔内，与未加强筋的对照组相比，所有纤维加强组的平均抗弯强度均显着提高（124％至490％）（P <.01）。当与玻璃纤维材料一起使用时，含硅烷的未填充粘合剂会产生最大的增强效果（364％）。在水中储存6个月后，当使用填充粘合剂时，玻璃纤维增​​强样品的平均抗弯强度（P <0.01）显着下降（P <0.01）。结论。在本研究的范围内，纤维类型和润湿剂的选择对纤维增强复合材料的弯曲性能具有显着的积极影响。当与含硅烷的未填充粘合剂一起使用时，玻璃纤维将未增强的间接复合材料的平均抗弯强度提高了364％。

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