Related Experiment Videos
A model for the dissolution and fluoride release from dental cements
Biomaterials, Medical Devices, and Artificial Organs
|January 1, 1983
Summary
Silicate and glass ionomer cements act as controlled release systems, not homogeneous monoliths. Their dissolution and ion release rates are influenced by surface area to volume ratios.
Area of Science:
- Materials Science
- Biomaterials Science
- Dental Materials
Background:
- Silicate and glass ionomer cements are widely used in dentistry.
- Understanding their dissolution and ion release behavior is crucial for clinical performance.
Purpose of the Study:
- To investigate the dissolution rate and fluoride ion release of dental cements.
- To correlate these properties with surface area:volume ratios, porosity, and elemental composition.
Main Methods:
- Dissolution tests with analysis of fluoride ion release.
- Dye penetration experiments.
- Energy-dispersive X-ray (EDX) analysis for elemental mapping (F, Si, P, Al, Ca).
- Brunauer-Emmett-Teller (BET) surface area analysis and mercury porosimetry.
Main Results:
- Cements exhibit controlled release behavior characteristic of porous granular monoliths.
- Dissolution and ion release rates vary with surface area:volume ratios.
- EDX analysis revealed elemental distribution over 7mm at 10-micron intervals after two months of immersion.
Conclusions:
- Homogeneous monolith equations are unsuitable for describing the behavior of these cements.
- Dental cements function as controlled release systems, with properties influenced by their microstructure and surface characteristics.