Related Experiment Video
Updated: May 29, 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
The all-ceramic, inlay supported fixed partial denture. Part 2. Fixed partial denture design: a finite element
M C Thompson1, C J Field, M V Swain
1Biomaterials, Faculty of Dentistry, The University of Sydney, New South Wales. thompsons@iinet.net.au
Australian Dental Journal
|September 3, 2011
Summary
This study found that all-ceramic fixed partial dentures supported by inlays experience about 20% higher peak stresses than those supported by full crowns. This suggests careful design is needed for inlay-supported ceramic bridges.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Prosthodontics
Background:
- All-ceramic crowns and fixed partial dentures are increasingly used due to durability.
- Inlays as abutment designs have faced challenges with high failure rates.
- Improved inlay preparation and prosthesis design may enable their use in all-ceramic fixed partial dentures.
Purpose of the Study:
- To compare the stress distribution in an inlay-supported all-ceramic bridge versus a traditional full crown-supported all-ceramic bridge.
- To evaluate the feasibility of using inlays as abutments for all-ceramic fixed partial dentures.
Main Methods:
- Three-dimensional finite element analysis (FEA) was employed.
- Simulated theoretical average maximum bite force (700 N) in the molar region.
- Compared stress levels (von Mises) between inlay-supported and full crown-supported all-ceramic bridges.
Main Results:
- Peak stresses in the inlay-supported bridge were approximately 20% higher than in the full crown-supported bridge.
- Von Mises stress peaked at approximately 730 MPa in the inlay bridge.
- This peak stress is comparable to the ultimate tensile strengths of current zirconia-based ceramics.
Conclusions:
- While an idealized inlay design can distribute stresses, inlay-supported all-ceramic bridges experience higher peak stresses than full crown-supported ones.
- The observed stress levels in inlay bridges approach the material limits of zirconia ceramics, highlighting potential failure risks.
- Further research into optimized inlay preparation and prosthesis design is warranted to improve the longevity of inlay-supported all-ceramic fixed partial dentures.
