Related Experiment Videos
Compressive strength of two modern all-ceramic crowns
1School of Dentistry, University of Tubingen, Germany.
The International Journal of Prosthodontics
|September 1, 1992
Summary
This study compared the compressive strength of new all-ceramic dental crowns. In-Ceram crowns demonstrated higher fracture resistance than IPS Empress systems, suggesting potential for clinical use.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Prosthodontics
Background:
- Advancements in dental ceramics offer aesthetic alternatives to traditional metal restorations.
- Evaluating the mechanical properties of new all-ceramic crown systems is crucial for clinical success.
Purpose of the Study:
- To investigate and compare the compressive strength of all-ceramic crowns fabricated with two novel systems.
- To establish a baseline for the mechanical performance of In-Ceram and IPS Empress dental crowns.
Main Methods:
- Compressive strength testing was performed on In-Ceram and IPS Empress (both paint-on and layered) all-ceramic crowns.
- Fracture resistance was measured in Newtons (N).
- Results were compared against metal-ceramic crowns with a nickel-chromium coping.
Main Results:
- Mean fracture forces were recorded: In-Ceram (964 N), paint-on IPS Empress (814 N), and layered IPS Empress (750 N).
- Metal-ceramic crowns exhibited the highest mean fracture force (1,494 N).
- All-ceramic systems showed lower, but potentially clinically acceptable, fracture resistance compared to metal-ceramic controls.
Conclusions:
- The tested all-ceramic crown systems exhibit varying degrees of compressive strength.
- Clinical evaluation of these new all-ceramic crown systems is warranted.
- Long-term clinical studies are necessary to confirm the safety and efficacy of these restorations.