Evaluation of smear layer removal by bicarbonate soda, ethylenediamine tetraacetic acid with cetrimide and sodium hypochlorite with a new model.

Abstract

Various methods are used to evaluate irrigants. The primary aim was to develop a model for preliminary testing of potential irrigants. The second aim was to investigate the effect of bicarbonate soda on smear layer by comparing it with ethylenediamine tetraacetic acid with cetrimide (EDTAC) and sodium hypochlorite (NaOCl). Extracted human single-canal teeth were halved, and a uniform filing method was used to create smear layer. The following solutions were then applied - distilled water (control), 1% NaOCl, 17% EDTAC and bicarbonate soda at concentrations of 1%, 5%, 10% and 15%. Some samples had multiple solutions in different sequences. Samples were examined by scanning electron microscopy. Representative images were scored based on the degree of smear layer remaining. Results were analysed with the SAS system, using the GENMOD procedure. Complete smear layer was found in samples treated with all solutions except EDTAC used alone. There were no significant differences between the sequences, EDTAC/NaOCl/EDTAC and NaOCl/EDTAC/NaOCl. There were no significant differences between groups with and without bicarbonate soda. In conclusion, the model was effective for testing chemical effects on solutions on smear layer. Bicarbonate soda did not remove smear layer and provided no additional cleaning effects after EDTAC and NaOCl.

• Authors: Natalie Leow, Paul Abbott, Jacqueline Castro Salgado, Laura Firth
• Journal: Australian endodontic journal : the journal of the Australian Society of Endodontology Inc (Aust Endod J) Vol. 38 Issue 3 Pg. 107-12 (Dec 2012) ISSN: 1747-4477 [Electronic] Australia
• PMID: 23211069 (Publication Type: Comparative Study, Journal Article)
• Copyright: © 2012 The Authors. Australian Endodontic Journal © 2012 Australian Society of Endodontology.

Chemical References

• Root Canal Irrigants
• Sodium Bicarbonate
• Edetic Acid
• Sodium Hypochlorite

Topics

• Dental Pulp Cavity (drug effects)
• Edetic Acid (pharmacology)
• Humans
• Microscopy, Electron, Scanning
• Root Canal Irrigants (pharmacology)
• Root Canal Preparation (methods)
• Smear Layer
• Sodium Bicarbonate (pharmacology)
• Sodium Hypochlorite (pharmacology)