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Physical properties of proprietary light-cured lining materials
Operative Dentistry
|November 1, 1991
Summary
This study compared four photopolymerized lining materials. Cavalite and TimeLine showed superior strength and neutral pH, unlike Vitrabond and XR-lonomer, which released fluoride and calcium.
Area of Science:
- Dental Materials Science
- Polymer Chemistry
Background:
- Photopolymerized lining materials are crucial in dental restorations.
- Understanding their physical properties is essential for clinical application.
Purpose of the Study:
- To compare the physical parameters of four novel photopolymerized lining materials.
- To differentiate their behavior based on mechanical strength, ion release, and pH.
Main Methods:
- Evaluation of compressive, diametral, and flexural strength.
- Measurement of modulus of elasticity.
- Assessment of fluoride and calcium release over four weeks.
- Monitoring of pH values for 24 hours.
Main Results:
- Cavalite and TimeLine were stronger and pH-neutral compared to Vitrabond and XR-lonomer.
- Vitrabond and XR-lonomer exhibited significant fluoride release; XR-lonomer also showed calcium release and low initial pH.
- Materials behaved distinctly: Cavalite/TimeLine like modified composites, Vitrabond/XR-lonomer like glass-ionomers.
Conclusions:
- Photopolymerized lining materials exhibit diverse properties influencing their suitability.
- Cavalite and TimeLine present characteristics favorable for composite resin-like applications.
- Vitrabond and XR-lonomer demonstrate glass-ionomer-like behavior, including ion release and pH changes.