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Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
469
Comparative evaluation of three different glass ionomer cements
T Hari Sainath Reddy1, K Vijay Venkatesh1, Rekha Mani1
1Department of Conservative Dentistry and Endodontics, SRM Kattankulathur Dental College and Hospital, Chennai, Tamil Nadu, India.
Summary
Hybrid Glass-Ionomer cement (HGIC) shows superior wear resistance and fluoride release compared to conventional and resin-modified glass ionomer cements. However, resin-modified glass ionomer cements exhibit higher flexural and shear bond strength.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Restorative Dentistry
Background:
- Advancements in dental restorative materials focus on enhancing properties of glass ionomer cements.
- Hybrid Glass-Ionomer cement (HGIC) is a novel material with unexplored properties.
Purpose of the Study:
- To compare the flexural strength, shear bond strength, wear resistance, and fluoride release of HGIC against Conventional Glass Ionomer Cement (CGIC) and Resin-Modified Glass Ionomer Cement (RMGIC).
Main Methods:
- An in vitro study involving 300 samples (100 per group, 20 per subgroup).
- Flexural and shear bond strength tested using a universal testing machine.
- Wear resistance assessed via pin-on-disc tribometer.
- Fluoride release measured at 24 hours and 1 week in deionized water.
Main Results:
- Resin-modified glass ionomer cement (RMGIC) demonstrated the highest flexural and shear bond strength, followed by HGIC and CGIC.
- HGIC exhibited the lowest wear rate, outperforming RMGIC and CGIC.
- HGIC showed the highest fluoride release at both 24 hours and 1 week.
Conclusions:
- HGIC offers superior wear resistance and fluoride release compared to CGIC and RMGIC.
- RMGIC provides higher flexural and shear bond strength than HGIC and CGIC.
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