| This study examined the effect of three sealers and four irrigants on retention of Dentatus® preformed posts luted with Panavia 21® resin cement.;Significant statistical and clinical effects between sealers and irrigants were observed. Nogenol® sealer reduced post retention. EWT® and AH26® increased post retention compared to no sealer. Both add etchants resulted in greater post retention than NaOCl or saline, alone, especially for AH26®.;Gutta percha, and EWT® (zinc-oxide eugenol), AH26 ® (epoxy resin), Nogenol® (salicylate), and no sealer (control) filled the root canals of 160 autoclaved incisor and premolar tooth roots. After 72 hours, 8 mm post spaces were created with Dentatus ® Probos Pathfinders and Dentatus® reamers. After irrigating the post spaces with saline, 5.25% NaOCl, 50% citric acid, then NaOCl, or 40% H3PO4, then NaOCl, Panavia 21 TC ® cement was introduced into the canal on the Dentatus ® No. 4 stainless steel post's threads. An up-and-down and counter-clockwise motion, then a forward twist seated the posts without engaging dentin. Mesio-distal and facio-lingual radiographs visualized the chambers. After 72 hours, posts were removed axially with an Instron at 5 mm/min. Tests for normality, Anova (2-way and 1-way), and Tukey's HSD test were performed. |
