title: The retentive effects of pre-fabricated posts by luting cements.
abstract: The purpose of this study was to compare the retention of two different pre-fabricated posts cemented to the root canal with four different adhesive luting cements and a zinc phosphate cement. The crowns of 100 freshly extracted human mandibular central and lateral incisors were removed at the cementoenamel junction and divided into two main groups (A = ParaPost and B = Flexi-Post) and further divided into five subgroups to evaluate the effects of five different cements (Rely-X ARC, Panavia F, ParaPost Cement, Flexi-Flow Natural and Adhesor) each with 10 samples. Post-holes were prepared on all of the roots following the manufacturer's instructions. Each sample was placed into a specialized jig and tensile strength tests performed by using testing machine with a crosshead speed of 0.638 cm min(-1) and force applied until failure. The data were analysed with one-way anova (Post Hoc a Scheffe's S test) and two-way anova (P < 0.001). The Flexi-Post dowels had a mean of 54.21 kg (s.d. = 9.37) and demonstrated statistically higher retention than ParaPost dowels with a mean of 33.93 kg (s.d. = 10.69) for all of the cement groups (P < 0.001). In Flexi-Post and ParaPost dowel groups; Rely-X ARC was statistically higher than the Panavia F, ParaPost Cement, Flexi-Flow Natural and Adhesor (P < 0.05). Adhesor was significantly lower than the other subgroups (P < 0.05). Resin luting cements have demonstrated very high tensile strength potential for a strong bond to dentin.
authors.affiliation: Department of Prosthodontic Dentistry, Istanbul University, Istanbul, Turkey. denizsen65@hotmail.com
authors.forename: D
authors.initials: D
authors.lastname: Sen
authors.forename: E
authors.initials: E
authors.lastname: Poyrazoglu
authors.forename: B
authors.initials: B
authors.lastname: Tuncelli
mesh_terms: D017438:Bisphenol A-Glycidyl Methacrylate; D003188:Composite Resins; D003442:Crowns; D003738:Dental Cements; D017268:Dental Prosthesis Retention / Q000379:methods*; D003793:Dental Restoration, Permanent / Q000379:methods*; D003799:Dental Stress Analysis / Q000379:methods; D017220:Dentin-Bonding Agents; D006801:Humans; D007180:Incisor; D011092:Polyethylene Glycols; D011109:Polymethacrylic Acids; D011176:Post and Core Technique; D019279:Resin Cements; D013718:Tensile Strength
chemical_list: D003188:Composite Resins; D003738:Dental Cements; D017220:Dentin-Bonding Agents; C101038:Flexi-Flow Natural; C438843:Panavia-Fluoro; C488490:ParaPost Cement; D011109:Polymethacrylic Acids; C462240:RelyX ARC; D019279:Resin Cements; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate