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The objective of this study is to evaluate the bond strength of glass fiber post after cemented with RelyXTM Unicem resin cement under different barometric pressure conditions. A total of 20 extracted, single-rooted lower premolars were endodontically treated. Post space was prepared and the glass fiber post was cemented with RelyXTM Unicem resin cement. They were then randomly divided into two subgroups (n=10) which were normal atmospheric pressure condition and hyperbaric pressure condition (higher than normal atmospheric pressure). The pullout bond strength of glass fiber post was tested using a universal testing machine. Independent t-test was used in the analysis. The mean pull-out bond strength of RelyXTM Unicem resin cement in hyperbaric pressure condition, 245.8 (±46.3) N exhibited significant higher (p>0.05) than when compared to normal atmospheric pressure condition, 148.5 (±35.0). The bond strength of glass fiber post was influenced by different barometric pressure conditions. RelyXTM Unicem resin cement had a higher bond strength under hyperbaric pressure condition than normal atmospheric pressure condition.

The influence of different barometric pressure conditions on bond strength of glass fiber post cemented with resin cement