IADR Abstract Archives

Intracanal Adhesive and Morphological Modification by Sodium Ascorbate After Endodontics

Objectives: Describe and compare microstructural morphology of intracanal dentin and adhesive behavior to cementation of fiber post (FP) on endodontic treated teeth irrigated with sodium ascorbate (SA) as antioxidant versus physiological serum (PS).
Methods: After Ethic's committee approval(ID181025001), endodontic was practice on 26 sound inferior premolars extracted due periodontal or surgical issues. They were prepared intracanally to receive a FP and then divided into 2 groups of 13 teeth each. Group (1) was irrigated with PS before cementation of FP, otherwise Group (2) was irrigated with 10% SA for 10 minutes . The appearance of the adherent surface was observed on 3 teeth of each group by Scanning electron Microscopy (SEM) and adhesion was measured on the rest of samples by Push out bond strength Test.
Results: The SEM images of surfaces treated with PS seem smoother than the 10% SA surfaces that look irregular and porous.(Images 1 and 2).

In relation to push out bond strength test, mean values are 6.320 MPa for Group (1) and 15.457 MPa for Group (2). Outcomes where compared using ANOVA( p<0.05) showing statistically significant differences. This is the first study about the use of 10% SA on dentine previously oxidated by conventional endodontic treatment, that shows differences in both evaluated parameters.
Conclusions: Despite the limitations of our study we can conclude that variation exists in superficial morphology and adhesive strength between teeth treated with different irrigation protocols prior FP cementation. Intracanal irrigation with SA 10% improves bond strength and morphological surface of adhesive substrate of endodontic treated dentin.
Authors would like to thank Fondequip EQM150101 for helping with the use of SEM: FESEM, FEI, Model Quanta 250FEG, USA.

2020 Chilean Division Meeting (Virtual)

2020

Dental Materials 4: Adhesion
  • Retamal, Josefa  ( Pontificia Universidad Catolica de Chile , Macul , Región Metropolitana , Chile )
  • Toledo, Javier  ( Pontificia Universidad Catolica de Chile , Macul , Región Metropolitana , Chile )
  • Rodriguez, Leonardo  ( Pontificia Universidad Catolica de Chile , Macul , Región Metropolitana , Chile )
  • Larraechea, Begoña  ( Pontificia Universidad Catolica de Chile , Macul , Región Metropolitana , Chile )
  • NONE
    Oral Session
    Oral Session 2