Shear bond strength of AH-26 root canal sealer to dentine using three dentine bonding agents.
OBJECTIVE
The purpose of the study was to compare the bond strength of AH-26 root canal sealer to human root canal dentine exposed to different intracanal medications both with and without the use of three bonding agents. The materials used were AH-26 sealer, two one-bottle bonding agents (Single Bond, Bond-1) and one self-etching bonding agent (Clearfill SE Bond).


METHODS
The dentine substrate was obtained from single rooted human teeth. The dentine specimens were treated either with EDTA 15% or phosphoric acid 37% to achieve the removal of smear layer. The AH-26 sealer was placed on the dentine surfaces both with and without the use of the bonding agents. Bond strength was tested using a single plane shear test assembly.


RESULTS
The SBS values were (MPa): Group A (EDTA-AH-26) 3.678+/-0.853, Group B (Phosphoric acid-AH-26) 3.470+/-0.834, Group C (EDTA-Single Bond-AH-26) 4.8+/-0.865, Group D (Phosphoric acid-Single Bond-AH-26) 5.043+/-1.022, Group E (EDTA-Bond 1-AH-26) 4.939+/-0.877, Group F (Phosphoric acid-Bond 1-AH-26) 5.101+/-1.117, Group G (Clearfill SE Bond-AH-26) 6.975+/-1.694. The use of dentine bonding agents improved significantly (p<0.05) the adhesion of AH-26 sealer with the root canal dentine. However, the best results were obtained with the self-etching system. Similar results were observed from the pretreatment of dentine either with phosphoric acid 35% or EDTA 15%.


CONCLUSIONS
The use of dentine bonding agents gave higher shear bond strengths of AH-26 sealer to human root canal dentine.
Gogos
Christos
C
Department of Endodontology, School of Dentistry, Aristotle University of Thessaloniki, Thessaloniki, Greece. aoos1@mycosmos.gr
Stavrianos
Christos
C
Kolokouris
Ioannis
I
Papadoyannis
Ioannis
I
Economides
Nikolaos
N
D000268:Adhesiveness; D000704:Analysis of Variance; D001729:Bismuth / Q000737:chemistry*; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002614:Chelating Agents / Q000737:chemistry; D001840:Dental Bonding; D003786:Dental Pulp Cavity / Q000648:ultrastructure; D003804:Dentin / Q000648:ultrastructure*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D004338:Drug Combinations; D004492:Edetic Acid / Q000737:chemistry; D004853:Epoxy Resins / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D010756:Phosphoric Acids / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D016369:Smear Layer; D018709:Statistics, Nonparametric; D013314:Stress, Mechanical; D014025:Titanium / Q000737:chemistry*
C115611:BOND-1 adhesive; D002614:Chelating Agents; C438313:Clearfil SE Bond; D017220:Dentin-Bonding Agents; D004338:Drug Combinations; D004853:Epoxy Resins; D008689:Methacrylates; D010756:Phosphoric Acids; D019279:Resin Cements; D012387:Root Canal Filling Materials; C115612:single bond; D012834:Silver; D017438:Bisphenol A-Glycidyl Methacrylate; C028044:epoxy resin AH-26; D004492:Edetic Acid; D014025:Titanium; D001729:Bismuth