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Effect of Using Different Chelating Agents on Shear Bond Strength of Resin-Modified Calcium Silicate-Based Capping
Mohamed Ahmed Elsayed1,2, Mohannad Nassar3, Karim Hany ElBeltagy4
1Department of Endodontics, RAK College of Dental Sciences, RAK Medical and Health Sciences University, Ras Al-Khaimah, UAE.
Summary
Chelating agents impact resin-modified calcium-silicate bond strength to dentine. Phytic acid and EDTA showed the highest bond strength, while effectiveness varied with smear layer removal.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Adhesion Science
Background:
- The shear bond strength (SBS) of resin-modified calcium-silicate (RMCS) to dentine is crucial for dental restorations.
- Understanding the influence of surface conditioning agents on dentine bonding is essential for improving clinical outcomes.
- Smear layer removal and dentinal tubule patency are key factors affecting adhesion to dentine.
Purpose of the Study:
- To evaluate the effects of various chelating agents on the shear bond strength of RMCS to dentine.
- To assess the efficacy of these agents in removing the dentine smear layer and promoting tubule patency.
- To determine the relationship between smear layer removal, tubule patency, and bond strength.
Main Methods:
- Human molar dentine surfaces were conditioned with different agents: chitosan nanoparticles (CNP), etidronic acid (EA), phytic acid (IP6), malic acid (MA), maleic acid (MeA), citric acid (CA), EDTA, sodium hypochlorite (NaOCl), or distilled water (control).
- RMCS were applied to the conditioned surfaces, and shear bond strength was tested.
- Scanning electron microscopy (SEM) was used to examine smear layer removal, and digital analysis assessed tubule patency.
Main Results:
- Ethylenediaminetetraacetic acid (EDTA) and phytic acid (IP6) demonstrated the highest shear bond strength.
- Sodium hypochlorite (NaOCl) and etidronic acid (EA) showed the lowest bond strength, though not statistically significant.
- Maleic acid (MeA), citric acid (CA), phytic acid (IP6), and malic acid (MA) were effective in smear layer removal.
- Malic acid (MA) and phytic acid (IP6) significantly increased dentinal tubule patency compared to the control.
Conclusions:
- The choice of conditioning agent influences the shear bond strength of RMCS to dentine.
- Complete smear layer removal does not necessarily correlate with the highest bond strength.
- Phytic acid and EDTA show promise for enhancing dentine bonding of RMCS materials.
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