Effects of different resin cements on bonding strength and failure modes of fiber posts

doi:10.3969/j.issn.2095-4344.2014.12.008

Abstract

Abstract:

BACKGROUND: The good performance of resin cements used to cement fiber-posts has been confirmed, but the adhesive properties of different kinds of resin cements remain different.
OBJECTIVE: To compare the shear bond strength of three resin cements (Bisco One-step, Clearfil DC, 3M ESPE RelyX Unicem) used to cement fiber posts and to observe their adhesive properties.
METHODS: Fifteen extracted teeth were selected and the crowns were removed with a diamond bur 1-mm coronal to the cemento-enamel junction followed by endodontic treatment. Then the teeth were randomly divided into three groups (n=5). Glass fiber posts were cemented respectively with three resin cements, and after embedding, the roots were cut into 2-mm-thick sections for push-out tests. The mean shear bonding strengths were compared, and the failure modes were recorded and analyzed under a high-power microscope.
RESULTS AND CONCLUSION: Mean bonding strengths were (4.69±1.85) MPa for Bisco One-step group, Clearfil DC, (6.10±0.36) MPa for Clearfil DC group, and (7.04±0.92) MPa for 3M ESPE RelyX Unicem group. The bonding strengths of RelyX Unicem and Clearfil DC groups were significantly greater than that of Bisco One-step group (P < 0.05), but no significant difference was between 3M ESPE RelyX Unicem group and Clearfil DC group. All samples were mainly defined as modes Ⅱ and Ⅳ failure, indicating that the adhesive failure was the most mode of fracture. These findings showed that the bonding strengths of fiber posts cemented to root canals with three different resin cements system exhibit significant differences, and the interface between dentine and resin cements is the primary weak link.

中国组织工程研究杂志出版内容重点：生物材料；骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性；组织工程

全文链接：

Key words: biocompatible materials, resin cements, shear strength, dentin

CLC Number:

R318

Liu Li, Chen Xiao-dong. Effects of different resin cements on bonding strength and failure modes of fiber posts[J]. Chinese Journal of Tissue Engineering Research, 2014, 18(12): 1852-1857.

Figures/Tables 2

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