Does endodontic post space irrigation affect smear layer removal and bonding effectiveness?

Abstract

The effect of different post space irrigants on smear layer removal and dentin bond strength was evaluated. Sixty-six extracted sound maxillary central incisors were endodontically treated. After post space preparation, the teeth were assigned to three groups of 22 teeth each. The teeth of these three groups were irrigated for 1 min with 17% ethylenediaminetetracetic acid (EDTA) (group 1), 5.25% sodium hypochlorite (NaOCl) (group 2), or 0.9% sodium chloride (NaCl) (group 3). In each group, eight specimens were split longitudinally for smear layer evaluation, and the other fourteen specimens were filled with a self-etching adhesive system (Panavia F). Four of 14 specimens of each group were prepared for evaluation of the resin-dentin interdiffusion zone (RDIZ) and resin tags, and the other 10 specimens were serially sectioned for push-out test analysis. Smear layer removal and bond strength were affected by different post space irrigants. EDTA removed the smear layer extremely effectively and, as a result, improved the bond strength at each region (apical, middle, and coronal) of the roots. Resin tag formation and the RDIZ were also affected by different irrigants and in accordance with bond strength. Therefore, removal of the smear layer use a self-etching luting system plays an important role in bonding effectiveness.

• Authors: Xin-Hua Gu, Cai-Yun Mao, Cong Liang, Hui-Ming Wang, Matthias Kern
• Journal: European journal of oral sciences (Eur J Oral Sci) Vol. 117 Issue 5 Pg. 597-603 (Oct 2009) ISSN: 1600-0722 [Electronic] England
• PMID: 19758258 (Publication Type: Comparative Study, Journal Article, Randomized Controlled Trial, Research Support, Non-U.S. Gov't)

Chemical References

• Dental Cements
• Dentin-Bonding Agents
• Epoxy Resins
• Panavia-Fluoro
• Resin Cements
• Root Canal Filling Materials
• Root Canal Irrigants
• epoxy resin-based root canal sealer
• Sodium Chloride
• Gutta-Percha
• Edetic Acid
• Sodium Hypochlorite

Topics

• Adult
• Dental Bonding
• Dental Cements (chemistry)
• Dental Pulp Cavity (ultrastructure)
• Dentin (ultrastructure)
• Dentin-Bonding Agents (chemistry)
• Edetic Acid (therapeutic use)
• Epoxy Resins (therapeutic use)
• Gutta-Percha (therapeutic use)
• Humans
• Materials Testing
• Microscopy, Electron, Scanning
• Middle Aged
• Post and Core Technique
• Resin Cements (chemistry)
• Root Canal Filling Materials (therapeutic use)
• Root Canal Irrigants (therapeutic use)
• Root Canal Preparation (methods)
• Root Canal Therapy (methods)
• Smear Layer
• Sodium Chloride (therapeutic use)
• Sodium Hypochlorite (therapeutic use)
• Stress, Mechanical
• Surface Properties
• Tooth Apex (ultrastructure)