title: Effect of root canal sealers and irrigation agents on retention of preformed posts luted with a resin cement.
abstract: This study examined the effect of three sealers and four irrigants on retention of Dentatus preformed posts luted with Panavia 21 resin cement. Gutta-percha with one of the following sealers--EWT, AH26, Nogenol, or no sealer (control)--was used to fill the root canals of 160 autoclaved incisor and premolar tooth roots. After 72 hr 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 followed by NaOCl, or 40% H3PO4, followed by NaOCl, Panavia 21 TC cement was introduced into the canal on the Dentatus #4 stainless steel post's threads. An up-and-down and counterclockwise motion and then a forward twist seated the posts without engaging dentin. Mesiodistal and faciolingual radiographs visualized the chambers. After 72 hr posts were removed axially with an Instron at 5 mm/min. Surprisingly, using Nogenol sealer reduced post retention whereas EWT and AH26 increased retention compared with no sealer. Post retention improved after acid etchants, especially for AH26.
authors.affiliation: Department of Prosthodontics, School of Dentistry, University of Louisville, Louisville, KY 40292, USA.
authors.forename: J T
authors.initials: JT
authors.lastname: Mayhew
authors.forename: A M
authors.initials: AM
authors.lastname: Windchy
authors.forename: L J
authors.initials: LJ
authors.lastname: Goldsmith
authors.forename: L
authors.initials: L
authors.lastname: Gettleman
mesh_terms: D000134:Acid Etching, Dental; D000704:Analysis of Variance; D001641:Bicuspid; D001729:Bismuth / Q000737:chemistry; D002484:Cementation; D019343:Citric Acid / Q000737:chemistry; D003799:Dental Stress Analysis; D003781:Denture Retention; D004202:Disinfectants / Q000737:chemistry; D004338:Drug Combinations; D004853:Epoxy Resins; D005054:Eugenol / Q000737:chemistry; D005227:Fatty Acids / Q000737:chemistry; D006171:Gutta-Percha / Q000737:chemistry; D006801:Humans; D007180:Incisor; D008709:Methenamine / Q000737:chemistry; D010710:Phosphates / Q000737:chemistry; D010756:Phosphoric Acids / Q000737:chemistry; D011176:Post and Core Technique; D019279:Resin Cements / Q000737:chemistry*; D012116:Resins, Plant / Q000737:chemistry; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012388:Root Canal Irrigants / Q000737:chemistry*; D018915:Root Canal Preparation / Q000295:instrumentation; D012459:Salicylates / Q000737:chemistry; D012834:Silver / Q000737:chemistry; D012973:Sodium Hypochlorite / Q000737:chemistry; D013193:Stainless Steel / Q000737:chemistry; D013314:Stress, Mechanical; D013943:Thymol / Q000737:chemistry; D014025:Titanium / Q000737:chemistry; D015034:Zinc Oxide / Q000737:chemistry
chemical_list: D004202:Disinfectants; D004338:Drug Combinations; D004853:Epoxy Resins; D005227:Fatty Acids; C093719:Panavia TPN-S; D010710:Phosphates; D010756:Phosphoric Acids; D019279:Resin Cements; D012116:Resins, Plant; D012387:Root Canal Filling Materials; D012388:Root Canal Irrigants; D012459:Salicylates; D013193:Stainless Steel; D019343:Citric Acid; D013943:Thymol; D012834:Silver; D005054:Eugenol; C028044:epoxy resin AH-26; C029586:Nogenol; D006171:Gutta-Percha; D014025:Titanium; D012973:Sodium Hypochlorite; D008709:Methenamine; D015034:Zinc Oxide; D001729:Bismuth