Abstract
Objectives: The aim of this study was to evaluate the mechanical properties, bonding performance and anti-microbial activity of a novel composite cement containing cetylpyridinium chloride (CPC) modified montmorillonite (‘CPC-Mont’), and using these parameters to determine the optimal particle size and concentration of CPC-Mont the composite cement can be loaded with. Methods: CPC-Mont particles with a median diameter of 30 and 7 µm were prepared and added to a composite cement at a concentration of 2, 3, 4, 5 and 7.5 wt%. Mechanical properties and bonding performance of the experimental composite cements were evaluated by 3-point bending and micro-tensile bond-strength testing. The amount of CPC released from the cement disks was quantified using a UV–vis recording spectrophotometer. The anti-biofilm activity was studied using scanning electron microscopy (SEM). Results: Adding 30-μm CPC-Mont decreased the mechanical properties and bonding performance of the composite cement, while no reduction was observed for the 7-μm CPC-Mont loaded cement formulation. Although CPC release substantially decreased during the 7-day period assessed, 5- and 7.5-wt% CPC-Mont loaded composite cement inhibited biofilm formation for 30 days. Significance: Loading composite cement with CPC-Mont with a median diameter of 7 µm at concentrations of 5–7.5 wt% was effective in achieving continuous anti-biofilm activity, while maintaining mechanical strength and bonding performance.
Original language | English |
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Pages (from-to) | 33-43 |
Number of pages | 11 |
Journal | Dental Materials |
Volume | 38 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jan 2022 |
Keywords
- Biofilm
- Cetylpyridinium chloride
- Montmorillonite
- Resin cement
- Secondary caries
ASJC Scopus subject areas
- Materials Science(all)
- Dentistry(all)
- Mechanics of Materials