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A comparative study of three glass ionomer base materials
J O Burgess1, N Barghi, D C Chan
1Department of Restorative Dentistry, University of Texas HSC at San Antonio 78284.
American Journal of Dentistry
|June 1, 1993
Summary
Visible light-cured (VLC) glass ionomer bases generally outperform autopolymerizing ones. Fuji LC demonstrated superior strength and bonding, while Vitrebond offered higher fluoride release, with Fuji LC also showing the smallest marginal gap.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Restorative Dentistry
Background:
- Glass ionomer cements (GICs) are widely used as dental base materials due to their fluoride-releasing properties and biocompatibility.
- Advancements in GIC technology include visible light-cured (VLC) formulations designed to improve handling and mechanical properties.
- Understanding the comparative performance of different GIC base materials is crucial for selecting optimal materials in clinical practice.
Purpose of the Study:
- To compare the physical, mechanical, and bonding properties of three distinct glass ionomer base materials.
- To evaluate the marginal integrity and fluoride release characteristics of visible light-cured (VLC) versus autopolymerizing GIC bases.
- To determine the clinical suitability of different GIC base materials for Class V cavity preparations.
Main Methods:
- Comparative in vitro study evaluating compressive strength, diametral tensile strength, and compressive modulus.
- Assessment of shear bond strength to dentin and resin composite substrates.
- Measurement of marginal gap formation in Class V cavities and quantification of fluoride release over time.
Main Results:
- Visible light-cured (VLC) glass ionomer base materials generally exhibited superior performance compared to the autopolymerizing Ketac-Bond.
- Fuji LC demonstrated significantly higher diametral tensile strength, compressive strength, and shear bond strength to both dentin and resin composite.
- Vitrebond showed greater fluoride release than Ketac-Bond and Fuji LC, while Fuji LC exhibited the smallest marginal gap at the tooth/base interface.
Conclusions:
- Visible light-cured (VLC) glass ionomer base materials offer enhanced mechanical properties and bonding capabilities over traditional autopolymerizing formulations.
- Fuji LC presents a favorable profile with superior strength, bonding, and marginal seal, making it a promising option for restorative dentistry.
- Material selection should consider specific clinical needs, balancing mechanical requirements, bonding efficacy, and fluoride release potential.