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Effects of different irrigation protocols on dentin surfaces as revealed through quantitative 3D surface texture
Shlomo Elbahary1,2, Sohad Haj-Yahya1, Majd Khawalid1
1Department of Endodontics, The Maurice and Gabriela Goldschleger School of Dental Medicine, Sackler Faculty of Medicine, Tel Aviv University, 69978, Tel Aviv, Israel.
Scientific Reports
|December 17, 2020
Summary
Ethylenediaminetetraacetic acid (EDTA) and sodium hypochlorite (NaOCl) irrigation protocols increase dentin roughness. However, the sequence of application does not impact surface texture, suggesting sealer retention is unaffected by irrigation order.
Area of Science:
- Endodontics
- Dental Materials Science
- Surface Engineering
Background:
- Root canal irrigation with ethylenediaminetetraacetic acid (EDTA) and sodium hypochlorite (NaOCl) is crucial for cleaning.
- The order of EDTA and NaOCl application may alter dentinal surface structure and affect sealer bond strength.
Purpose of the Study:
- To quantitatively assess the impact of different EDTA and NaOCl irrigation sequences on root dentin surface roughness.
- To determine if the irrigation protocol influences dentin surface texture relevant to sealer mechanical retention.
Main Methods:
- 150 human root dentin sections were divided into five groups: control, EDTA alone, NaOCl alone, EDTA followed by NaOCl, and NaOCl followed by EDTA.
- Three-dimensional surface texture analysis was performed using a confocal disc-scanning measuring system.
Main Results:
- EDTA (17%) and the combination of EDTA with NaOCl (5.25%) significantly increased dentin surface roughness compared to the control and NaOCl alone.
- The sequence of EDTA and NaOCl application did not produce significant differences in dentin roughness properties.
Conclusions:
- EDTA-containing irrigation protocols enhance dentin surface roughness.
- The irrigation sequence of EDTA and NaOCl does not appear to be a critical factor for dentin roughness and likely does not affect sealer mechanical retention.

