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Effect of different pretreatments to post-space on bonding strength of fiber posts luted with a self-adhesive resin cement

  • Cementitious material
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Abstract

The effects of different post-space pretreatments on the retentive force of fiber posts cemented with a self-adhesive resin cement were investigated. Twenty-eight single-canal premolars were obturated by Resilon using warm vertical compaction and treated with distilled water, 2.5% NaOCl, 17% EDTA and 2.5% NaOCl; or 17% EDTA, 2.5% NaOCl, and ultrasonic agitation (U/E/N treatment). Subsequently, radicular dentin surfaces were observed under scanning electron microscopy (SEM). RelyX Fiber Posts were cemented in the treated canals by using RelyX U100, and thin-slice push-out test and SEM observation of coronal and apical regions of the specimens were performed. Data were analyzed using two-way ANOVA and Tukey’s HSD posthoc tests, and the percentage of failure type was calculated. Ultrasonic/EDTA/NaOCl irrigation showed the maximum effectiveness in removing the smear layer and debris on the dentin surface. The apical bond strength of the experimental groups was significantly higher than that of the control group (P< 0.05). Adhesive failure between cement and dentin was the most common mode of failure. No obvious RDIZ or resin tag was detected. Chemical irrigants facilitated the bonding of these fiber posts, and ultrasonic activation improved retention. Future studies should evaluate the effectiveness of irrigation on fiber post push-out strength in fatigue cycling condition.

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Authors and Affiliations

  1. Department of Prosthodontics, School and Hospital of Stomatology, Wuhan University, Wuhan, 430070, China

    Yong Xia  (夏勇) & Xiangrong Cheng  (程祥荣)

Authors
  1. Yong Xia  (夏勇)
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  2. Xiangrong Cheng  (程祥荣)
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Correspondence to Xiangrong Cheng  (程祥荣).

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Funded by the National Natural Science Foundation of China (No. H1408)

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Xia, Y., Cheng, X. Effect of different pretreatments to post-space on bonding strength of fiber posts luted with a self-adhesive resin cement. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 28, 984–989 (2013). https://doi.org/10.1007/s11595-013-0805-3

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  • DOI: https://doi.org/10.1007/s11595-013-0805-3

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