Evaluation of four cementation strategies on the push-out bond strength between fiber post and root dentin.
This trial used push-out testing to evaluate four different fiber post cementation strategies. Specimens of bovine mandibular teeth were randomly allocated into four groups according to cementation strategies (n = 10): ScotchBond MultiPurpose and RelyX ARC (Group 1); AdheSE and Multilink Automix (Group 2); phosphoric acid and RelyX U100 (Group 3); and RelyX U100 (Group 4). Four slices from each specimen (2.0 mm thick) were obtained for the push-out test. All slices were analyzed for failure mode after testing.  A one-way ANOVA showed differences between the groups (P = 0.002). A Tukey test indicated that Group 1 had the highest bond strength values (13.96 ± 6.41 MPa). Groups 2 (6.58 ± 2.14 MPa), 3 (5.85 ± 2.57 MPa), and 4 (8.19 ± 2.28 MPa) had similar bond strengths, but all of them were lower than Group 1. A three-step total etching adhesive system, associated with a conventional resin cement, might be a good alternative for fiber post cementation.
Department of Restorative Dentistry, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil.
Cesar Dalmolin
CD
Bergoli
Marina
M
Amaral
Carolina Ceolin
CC
Druck
Luiz Felipe
LF
Valandro
D000134:Acid Etching, Dental / Q000379:methods; D000180:Acrylic Resins / Q000737:chemistry; D000268:Adhesiveness; D000818:Animals; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002417:Cattle; D002484:Cementation / Q000379:methods*; D001840:Dental Bonding; D003764:Dental Materials / Q000737:chemistry; D003786:Dental Pulp Cavity / Q000648:ultrastructure*; D003799:Dental Stress Analysis / Q000295:instrumentation; D003804:Dentin / Q000648:ultrastructure*; D017220:Dentin-Bonding Agents / Q000737:chemistry; D005898:Glass / Q000737:chemistry; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D010756:Phosphoric Acids / Q000737:chemistry; D011092:Polyethylene Glycols / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D011176:Post and Core Technique / Q000295:instrumentation*; D011897:Random Allocation; D019279:Resin Cements / Q000737:chemistry*; D013314:Stress, Mechanical; D013499:Surface Properties; D014092:Tooth Root / Q000648:ultrastructure*
D000180:Acrylic Resins; C489662:AdheSE cement; D003764:Dental Materials; D017220:Dentin-Bonding Agents; D010756:Phosphoric Acids; D011109:Polymethacrylic Acids; C462240:RelyX ARC; D019279:Resin Cements; C084018:Scotchbond Multi-Purpose; C009753:fiberglass; C502351:multilink adhesive system; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate; C030242:phosphoric acid