| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Jager, N. De
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2020Effect of different materials and undercut on the removal force and stress distribution in circumferential clasps during direct retainer action in removable partial denturescitations
- 2020Fatigue performance of distinct CAD/CAM dental ceramicscitations
- 2020Young’s modulus and poisson ratio of composite materialscitations
- 2018Does luting strategy affect the fatigue behavior of bonded Y-TZP ceramic?citations
- 2017Adhesive cementation promotes higher fatigue resistance to zirconia crownscitations
- 2015Mechanical performance of implant-supported posterior crownscitations
- 2012The influence of pigments on the slow crack growth in dental zirconiacitations
- 2010The influence of rotating fatigue on the bond strength of zirconia-composite interfacescitations
- 2008Influence of retainer design on two-unit cantilever resin-bonded glass fiber reinforced composite fixed dental prostheses: An in vitro and finite element analysis study
Places of action
| Organizations | Location | People |
|---|
article
Mechanical performance of implant-supported posterior crowns
Abstract
Statement of problem<br/>The fracture of implant-supported restorations, especially of the veneering layer, is a common problem in dentistry. Monolithic ceramic or resin restorations might help solve this problem.<br/><br/>Purpose<br/>The purpose of this in vitro study was to obtain additional insight into the risk of fracture of implant-supported restorations.<br/><br/>Material and methods<br/>Identical crowns (n=10) of 10 different ceramic and composite resin materials were cemented on conventional abutments on implant replicas embedded in polymethyl methacrylate blocks. The specimens were subjected to compressive load in a universal testing machine to record initial load to failure (ILF). Additionally, the flexural strength (FS), compressive strength (CS), and elastic modulus (E) of the investigated materials were determined. These results were used in a finite element analysis model of a composite resin and a lithium disilicate crown.<br/><br/>Results<br/>Anatomic contour zirconia (Lava Plus) crowns had the highest ILF (6065 N), followed by lithium disilicate (IPS e.max) (2788 N) and the composite resin materials (Protemp 4, Majesty Flow, Telio CAD, Estenia C&B, Lava Ultimate, VITA Enamic) (2386 to 1935 N). Veneered zirconia (Lava) crowns showed the lowest ILF (1477 N). The highest FS, CS, and E were found for Lava Plus and IPS e.max. No direct relationship was found between ILF and the FS, CS, or E. The finite element analysis showed stresses that did not exceed the FS or CS of IPS e.max. The surface roughness of these crowns might have caused initial failure at relatively low stresses.<br/><br/>Conclusions<br/>In this laboratory study, monolithic implant-supported crowns showed a higher ILF than conventional veneered ceramic crowns. Monolithic ceramic restorations might perform better than composite resin crowns.