Related Experiment Videos
[Polymerization shrinkage of light-hardened composites]
A Tappe1, U Matschinske, B Sander
1Abteilung für Biomaterialforschung und medizinische Werkstoffkunde des Zentrums für Zahn-, Mund- und Kieferheilkunde, Medizinischen Fakultät (Charité), Humboldt-Universität, Berlin.
Zahn-, Mund-, Und Kieferheilkunde Mit Zentralblatt
|January 1, 1990
Summary
Polymerization shrinkage in visible-light-cured composites was measured. Filler type and photoinitiator content affect composite curing rates and shrinkage.
Area of Science:
- Materials Science
- Polymer Chemistry
- Dental Materials
Background:
- Polymerization shrinkage is a critical factor in the performance of dental composite resins.
- Understanding shrinkage is essential for improving material properties and clinical outcomes.
Purpose of the Study:
- To measure polymerization shrinkage and its time-dependent behavior in visible-light-cured composite resins.
- To investigate the influence of fillers and photoinitiator concentration on curing rates.
Main Methods:
- Measurement of absolute polymerization shrinkage values over time.
- Analysis of commercially available and developmental composite resins.
- Evaluation of filler composition and photoinitiator content.
Main Results:
- Quantified polymerization shrinkage for various composite resins.
- Demonstrated a correlation between filler content, photoinitiator amount, and curing rate.
- Identified key factors influencing the time-dependent course of shrinkage.
Conclusions:
- Polymerization shrinkage is a measurable phenomenon influenced by material composition.
- Filler characteristics and photoinitiator levels are critical determinants of composite curing dynamics and shrinkage behavior.