Fracture strengths of endocrown restorations fabricated with different preparation depths and CAD/CAM materials
| Autor: | Ege Köseler, Yasemin Yildiran-Avcu, Serkan Saridag, Burcu Kanat-Ertürk, Egemen Avcu, Dilek Helvacioglu-Yigit |
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| Rok vydání: | 2018 |
| Předmět: |
Dental Stress Analysis
Ceramics Materials science Potassium Compounds 0206 medical engineering 02 engineering and technology In Vitro Techniques 03 medical and health sciences Dental Materials 0302 clinical medicine Dental porcelain Flexural strength Incisor Materials Testing medicine Humans Cubic zirconia Ceramic Dental Restoration Failure General Dentistry Fracture type Resin cement Orthodontics Tooth Nonvital Crowns 030206 dentistry 020601 biomedical engineering Dental Porcelain Resin Cements medicine.anatomical_structure visual_art Ceramics and Composites visual_art.visual_art_medium Fracture (geology) Computer-Aided Design Aluminum Silicates Zirconium |
| Zdroj: | Dental materials journal. 37(2) |
| ISSN: | 1881-1361 |
| Popis: | The objectives of this study were to compare the fracture strength of endocrown restorations fabricated with different preparation depth and various CAD/CAM ceramics, and to assess the fracture types. Endodontically treated 100 extracted human permanent maxillary centrals were divided into two preparation depth groups as short (S: 3-mm-deep) and long (L: 6-mm-deep), then five ceramic subgroups, namely: feldspathic-ceramic (Vita Mark II-VM2), lithium-disilicate glass-ceramic (IPS e.max CAD-E.max), resin-ceramic (LAVA Ultimate-LU), polymer infiltrated ceramic (Vita Enamic-VE) and monoblock zirconia (inCoris TZI-TZI) (n=10/subgroup). The endocrowns were fabricated by CAD/CAM and were cemented with resin cement (RelyX U200). The teeth were thermally cycled (5,000cycles) and fracture tests were performed at 45o angle to the teeth. The data were statistically analyzed (Kruskal-Wallis, Mann Whitney U), failure modes were evaluated with stereomicroscopy. Zirconia group provided the statistically highest fracture strength, but also exhibited non-repairable failures. Preparation depth has an effect on the fracture strength only for feldspathic ceramic. |
| Databáze: | OpenAIRE |
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