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Calcium Carbonate Formation in the Presence of Biopolymeric Additives
Published on: May 14, 2019
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Variables affecting ion release from resin-based materials containing calcium orthophosphate particles
Filipe Teles Ximenes Mesquita1, Handially Dos Santos Vilela1, Rafael Bergamo Trinca1
1University of São Paulo School of Dentistry, Department of Biomaterials and Oral Biology, Av. Prof. Lineu Prestes, 2227, São Paulo, SP 05508-000, Brazil.
Summary
Calcium ion (Ca2+) release from resin-based materials is significantly affected by experimental conditions. Frequent immersion medium renewal, larger medium volumes, and higher specimen surface-area-to-volume ratios enhance Ca2+ release.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Dental Materials Science
Background:
- Resin-based dental materials are widely used.
- Dicalcium phosphate dihydrate (DCPD) incorporation aims to improve material properties.
- Understanding ion release is crucial for clinical performance and safety.
Purpose of the Study:
- To investigate how experimental variables influence calcium ion (Ca2+) release from resin-based materials containing DCPD particles.
- To analyze the impact of immersion medium renewal frequency, volume, and specimen dimensions on Ca2+ release kinetics.
Main Methods:
- Resin-based materials with varying DCPD concentrations (25% and 50%) were prepared using BisGMA and TEGDMA.
- Ca2+ release was quantified using ICP-OES under different experimental conditions.
- Release kinetics were modeled using the Peppas-Sahlin equation, with data analyzed via ANOVA.
Main Results:
- Increased Ca2+ release was observed with weekly/biweekly deionized water (DW) renewal compared to less frequent renewal.
- Higher DW volumes and specimens with greater surface-area-to-volume ratios resulted in significantly higher Ca2+ release.
- Diffusion dominated early release for 25% DCPD, while polymer relaxation became more significant over time, especially for 50% DCPD.
Conclusions:
- Experimental variables such as immersion medium renewal frequency, volume, and specimen dimensions critically influence Ca2+ ion release from DCPD-containing resin materials.
- Researchers and clinicians must consider these factors when designing experiments and interpreting results related to ion release.
- Awareness of these variables is essential for predicting material behavior and clinical outcomes.
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