Abstract
The residual shrinkage stress distributions associated with various tooth deformations were validated and calculated after the restoration of composites. A polymerization model based on the post-gel shrinkage concept was employed to calculate the occlusion deformation pattern and residual stress states of the tooth, restoration and tooth-restoration interface. The results show that the tooth's resistance against polymerization shrinkage decreased with the loss of dental hard tissue. It was concluded that shrinkage stress cannot be based upon composite properties or restoration configuration alone, but should be considered as a distributed pattern.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 554-564 |
| Number of pages | 11 |
| Journal | Dental Materials |
| Volume | 20 |
| Issue number | 6 |
| DOIs | |
| State | Published - Jul 2004 |
Bibliographical note
Funding Information:Based in part on abstract No. 498, presented at the 80th IADR meeting in San Diego, March 6–9, 2002. The authors thank Iryna B. Olson for her assistance with the Cumulus analysis. This study was supported by the Minnesota Dental Research Center for Biomaterials and Biomechanics, a Faculty Development Grant from Chulalongkorn University, and NIH/NIDR Grant R01-DE12225.
Keywords
- Composite restoration
- Deformation
- Microhardness
- Polymerization shrinkage
- Post-gel shrinkage
- Residual stress
- Restorative composite
- Shrinkage stress
- Strain gauge