Related Experiment Video
Updated: Jun 18, 2026
07:42
Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
A suitable base material for composite resin restorations: zinc oxide eugenol
Li-Hong He1, David G Purton, Michael V Swain
1Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, Dunedin 9054, New Zealand. lihong.he@otago.ac.nz
Journal of Dentistry
|December 8, 2009
Summary
Zinc oxide eugenol (ZOE) bases slightly reduce composite resin
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
Background:
- Zinc oxide eugenol (ZOE) is a commonly used dental base material.
- Its potential impact on the mechanical properties of overlying composite resins requires investigation.
Purpose of the Study:
- To evaluate the in vitro effects of a ZOE base on the mechanical properties of composite resin restorations.
- To determine the extent of eugenol's influence on composite resin near the interface.
Main Methods:
- Class I cavities were prepared in plastic teeth and restored with ZOE and composite resin.
- Nanoindentation was used to measure elastic modulus and hardness near the ZOE-resin interface.
- Scanning Electron Microscopy (SEM) examined the interface morphology.
Main Results:
- Composite resin near the ZOE base showed reduced elastic modulus (9.71 GPa) and hardness (0.51 GPa).
- Detrimental effects of eugenol were limited to less than 100 micrometers from the ZOE base.
- Eugenol exhibited a slight suppression of composite resin polymerization.
Conclusions:
- Despite minor polymerization suppression, ZOE remains a viable base for composite resins due to its biological benefits.
- Adequate bonding is crucial for composite resin restorations placed over ZOE bases to prevent detachment.
- This study quantifies the mechanical property changes in composite resin adjacent to ZOE bases.
