Comparison of push-out bond strengths of Resilon with three different sealers.
BACKGROUND
The purpose of this study was to evaluate the push-out bond strengths of different obturating materials.


METHODS
Forty single-rooted human extracted teeth were used in this study. The teeth were instrumented and irrigated by using 5.25% NaOCl, 15% ethylenediaminetetraacetic acid, and sterile water. The teeth were then filled with Resilon/RealSeal, Resilon/RealSeal SE, Resilon/MetaSeal , or gutta-percha/Kerr EWT sealer. The roots were then sectioned into 1-mm-thick slices and subjected to vertical loading to displace the obturating material toward the coronal side of the slice. The bond strength was then calculated and subjected to statistical analysis. Slices were examined by using a stereomicroscope at 30x to determine the mode of failure.


RESULTS
The mean push-out bond strengths were as follows: Resilon/RealSeal, 1.45 +/- 0.99 MPa; RealSeal SE, 0.88 +/- 0.49 MPa; Resilon/MetaSeal, 2.41 +/- 1.7 MPa; and gutta-percha/Kerr EWT sealer, 2.32 +/- 0.74 MPa.


CONCLUSIONS
The push-out bond strengths of Resilon/MetaSeal and gutta-percha/Kerr EWT were significantly (P < .05) higher than either Resilon/RealSeal or Resilon/RealSeal SE. Resilon/MetaSeal and gutta-percha/Kerr EWT did not differ significantly.
Stiegemeier
Danielle
D
Department of Endodontology, Oregon Health and Science University, Portland, Oregon 97201, USA.
Baumgartner
J Craig
JC
Ferracane
Jack
J
D003188:Composite Resins / Q000737:chemistry / Q000627:therapeutic use; D001840:Dental Bonding; D017005:Dental Debonding; D003786:Dental Pulp Cavity / Q000187:drug effects / Q000601:surgery; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis; D003804:Dentin / Q000187:drug effects*; D017220:Dentin-Bonding Agents / Q000737:chemistry / Q000627:therapeutic use; D006171:Gutta-Percha / Q000737:chemistry / Q000627:therapeutic use; D006801:Humans; D008689:Methacrylates / Q000737:chemistry / Q000627:therapeutic use; D012387:Root Canal Filling Materials / Q000737:chemistry* / Q000627:therapeutic use; D012389:Root Canal Obturation / Q000379:methods*; D018915:Root Canal Preparation / Q000379:methods; D013314:Stress, Mechanical
D003188:Composite Resins; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D012387:Root Canal Filling Materials; C486892:resilon sealer; D006171:Gutta-Percha