Endodontic treatment , method of cement application , and post pretreatment are factors that might significantly affect the retention of glass-fiber posts  into root canals mainly when cemented with regular resin cement .
Self-adhesive resin cements were found to be less technique-sensitive to luting procedures as compared with regular resin cements
This study aim ed to identify factors that can affect the retention of glass fiber posts to intra-radicular dentin based on in vitro studies that compared the bond strength ( BS ) of GFPs cemented with resin cements .
Influence of chlorhexidine and ethanol on the bond strength and durability of the adhesion of the fiber posts to root dentin using a total etching adhesive system.
INTRODUCTION The aim of this study was to investigate the effects of pretreatment of gel chlorhexidine ( CHX ) and ethanol ( EtOH ) on the bond strength and durability of the adhesion of the fiber post relined with resin composite to the root dentin using a total etch adhesive system . METHODS Forty bovine incisor roots were divided into four groups after phosphoric acid etching : irrigation with physiologic solution ( control ) , 5 minutes with CHX , 1 minute with EtOH , and 5 minutes with chlorhexidine followed by 1 minute with EtOH . Fiber posts relined with resin composite were cemented with either RelyX ARC ( 3 M ESPE , St Paul , MN ) and a total etch adhesive system Scotchbond Multi- Purpose ( 3 M ESPE ) . Each group was r and omly divided into two subgroups : 24 hours of storage and 12 months of storage . All roots were sectioned transversely , and the push-out test was performed . Failure modes were observed , and the bond strength means were analyzed by analysis of variance and the Tukey test ( α = 0.05 ) . RESULTS CHX irrigation result ed in homogeneous bond strength values at 24 hours and 12 months of storage ( P < .05 ) . A significant bond strength decrease was noticed after 12 months of storage when irrigations were performed with physiologic solution and EtOH application only or associated with CHX ( P < .05 ) . CONCLUSIONS The use of CHX pretreatment could preserve the bond strength of the fiber post relined with resin composite to root dentin for 12 months . The use of EtOH and CHX followed by EtOH did not preserve the bond strength of the total etch adhesive system Scotchbond Multi- Purpose
Endodontic treatment , method of cement application , and post pretreatment are factors that might significantly affect the retention of glass-fiber posts  into root canals mainly when cemented with regular resin cement .
Self-adhesive resin cements were found to be less technique-sensitive to luting procedures as compared with regular resin cements
This study aim ed to identify factors that can affect the retention of glass fiber posts to intra-radicular dentin based on in vitro studies that compared the bond strength ( BS ) of GFPs cemented with resin cements .