Effect of incisal preparation design on load-to-failure of ceramic veneers
| Autor: | Bronwyn J. Lowe, John M. Aarts, Sy Yin Chai, Vincent Bennani, Karl Lyons |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Dental Stress Analysis
Ceramics Materials science 0206 medical engineering 02 engineering and technology Crosshead 03 medical and health sciences 0302 clinical medicine Load to failure Materials Testing Ceramic Dental Restoration Failure General Dentistry Resin cement Orthodontics Typodont Universal testing machine Incisal Edge 030206 dentistry 020601 biomedical engineering Dental Porcelain Resin Cements Dental Veneers visual_art visual_art.visual_art_medium Butt joint Computer-Aided Design |
| Zdroj: | Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.]REFERENCES. 32(4) |
| ISSN: | 1708-8240 |
| Popis: | Objective This in vitro study aims to evaluate load-to-failure of ceramic veneers with butt joint (BJ) and feathered edge (FE) incisal preparation designs, and to correlate these results to the failure mode of the restorations. Materials and methods One hundred and forty-eight typodont teeth (customized Nissin A25A-UL19B) were divided into two different preparation configurations BJ and FE and two different loading angulations, 0° and 20°. Lithium disilicate ceramic veneers (IPS e.max CAD, Ivoclar Vivadent) were milled using computer-aided-design-and-computer-aided-manufacturing (CAD/CAM) techniques. Veneers were bonded to typodont teeth with resin cement (IPS Variolink Esthetic, Ivoclar Vivadent). Each group was loaded at the incisal edge using an Instron Universal Testing Machine at a crosshead speed of 0.01 mm/s till failure. Results Pairwise comparison showed veneers from the BJ groups had a significantly higher load-to-failure value compared to the FE groups. Veneers with a FE preparation design loaded at 20° angulation had the lowest load-to-failure value. Conclusions Within the limitations of the present study, both incisal preparation designs and loading angulations have significant effects on the load-to-failure values of ceramic veneers. BJ group exhibits a significantly higher load-to-failure value compared to the FE group. Clinical significance BJ incisal preparation is preferred over FE preparation design. |
| Databáze: | OpenAIRE |
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