Department of Dental Biomaterials and Bioengineering, Dental College, Yonsei University, 250 Seongsanno, Seodaemun-gu, Seoul 120-752, Korea.
Dent Mater J. 2011;30(1):38-44. doi: 10.4012/dmj.2010-053. Epub 2011 Jan 26.
The aim of this study was to estimate the flexural properties of three kinds of experimental fiber-reinforced composite (FRC) posts and to evaluate their potential use as posts. Experimental FRC posts were fabricated with glass, aramid, and UHMWP fibers. Commercial FRC posts were used for comparison. A three-point bending test was performed at a crosshead speed of 1 mm/min. Experimental glass fiber posts showed significantly higher flexural strengths and moduli than aramid and UHMWP posts. Experimental UHMWP posts demonstrated superior toughness to the commercial posts. The glass fiber posts displayed stiff, strong and brittle features, while the UHMWP posts were flexible, weak and ductile. The flexural properties of the aramid posts fell between those of the glass and UHMWP posts. In conclusion, the glass fiber posts proved excellent in flexural strengths and moduli. However, the superior toughness of UHMWP fibers suggests the possibility of their use as posts in combination with glass fibers.
本研究旨在评估三种实验性纤维增强复合材料（FRC）桩的弯曲性能，并评估其作为桩的潜在用途。实验性 FRC 桩由玻璃纤维、芳纶纤维和 UHMWP 纤维制成。商业 FRC 桩用于比较。在 1mm/min 的十字头速度下进行三点弯曲测试。实验玻璃纤维桩的弯曲强度和模量明显高于芳纶纤维和 UHMWP 纤维桩。实验 UHMWP 桩的韧性优于商业桩。玻璃纤维桩表现出刚性、高强度和脆性特征，而 UHMWP 桩则具有柔韧性、低强度和延性。芳纶纤维桩的弯曲性能介于玻璃纤维桩和 UHMWP 纤维桩之间。总之，玻璃纤维桩在弯曲强度和模量方面表现出色。然而，UHMWP 纤维的优异韧性表明其与玻璃纤维结合作为桩的可能性。
