Journal article
Shrinkage reduction of dental composites by addition of expandable zirconia filler
DentoFit A/S1
Department of Micro- and Nanotechnology, Technical University of Denmark2
Composites and Materials Mechanics, Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark3
Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark4
Risø National Laboratory for Sustainable Energy, Technical University of Denmark5
Fuel Cells and Solid State Chemistry Division. Management, Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark6
Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark7
Aneedle8
A problem with dental resin composites is the polymerization shrinkage, which makes the filling loosen from the tooth or induces crack formation. We have developed an expandable metastable tetragonal zirconia filler, which upon reaction with water, is able to counter the polymer shrinkage. The shrinkage of the composite was calculated from density measurements using Archimedes method.
The rate of the phase transformation in resin was measured by determining the volume fraction of monoclinic zirconia (vm). The composite had a vm of 0.5 after 8 h of water storage. The overall shrinkage of the composites was reduced from 3.2% (initially) to 1.7%.
| Language: | English |
|---|---|
| Publisher: | SAGE Publications |
| Year: | 2011 |
| Pages: | 2817-2822 |
| ISSN: | 1530793x and 00219983 |
| Types: | Journal article |
| DOI: | 10.1177/0021998311401936 |
| ORCIDs: | Almdal, Kristoffer , Sørensen, Bent F. and Linderoth, Søren |
