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The effect of two endodontic sealers and interval before post-preparation and cementation on the bond strength of fiber posts. | LitMetric
Objectives : To evaluate the effect of different endodontic sealers (epoxy resin-based and bioceramic-based) and the time of post-cementation on the bond strength of a fiber post cemented with resin cement.Methods : Forty human premolars were instrumented and divided into 4 groups. According to the type of sealer and the time of post-cementation: AH-IM (AH Plus, post-cemented immediately after root canal treatment), SP-IM (iRoot SP, post-cemented immediately after root canal treatment), AH-OW (AH Plus, post-cementation after one week), and SP-OW (iRoot SP, post-cementation after one week). In each group, the samples were submitted to push-out test, and failure mode was assessed. Levene's test, one-way ANOVA, and Kruskal-Wallis analysis were applied for statistical analysis (α = 5%).Results : The highest mean push-out bond strength was obtained from the SP-IM group in the apical part (10.45 ± 5.15MPa), while the lowest was observed in samples from the AH-OW group in the middle part (2.63 ± 1.54 MPa). One-way ANOVA showed that within the same root region, the time of post-cementation had a negative influence on the bonding strength in the SP groups in the middle and apical portion (P<0.05), however, when comparing the effect of type of sealers on bonding strength between the OW groups or IM groups within the same root region, no significant difference was observed regardless of the post cementation time (P>0.05).Conclusions : The bond strength of the fiber post was higher when the post was cemented immediately after root canal treatment when the bioceramic sealer was applied.Clinical Relevance : The correct choice of an endodontic sealer and the proper time of post-cementation may help to obtain the best quality of post-and-core restoration.
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