关键词: 纤维桩, 挠曲强度, 弹性模量, 纤维/基质比, fiber post, flexure strength, elastic modulus, fiber/matrix ratios

Abstract: Abstract: Objective To compare and analyse the flexure strength and elastic modulus of 4 kinds of dental fiber posts frequently used in clinics. Methods The flexural strength and elastic modulus of Style Post (group A), Parapost Fiber Whiter (group B), Fiber Kor (group C) and Twin-Luscent Anchor (group D) fiber posts were measured through three-point bending test with 10 firber posts in each group. The results were statistically analyzed. Results The flexure strength of group A was the highest, while that of group B and group C was the lowest, and there were no statistical differences among the groups (P>0.05). There were no significant differences between group A and group D in elastic modulus (P>0.05), and the elastic modulus of group A and group D were both lower than that of the other two groups (P<0.05). Multitudinous cracks were observed in group B and C from SEM photos and there was a great degree of rupture generally . Conclusion The the flexure strength and elastic modulus of 4 kinds of glass fiber posts are significantly different. The flexural strength and fiber/matrix ratios are linearly dependent.