Clinical Evaluation of CAD/CAM Metal-Ceramic Posterior Crowns Fabricated from Intraoral Digital Impressions

2014 ◽  
Vol 27 (4) ◽  
pp. 331-337 ◽  
Author(s):  
Hazem Tamim ◽  
Henrik Skjerven ◽  
Anders Ekfeldt ◽  
Hans Rønold
Keyword(s):  
Clinical Evaluation ◽  
Digital Impressions ◽  
Metal Ceramic ◽  
Cad Cam

scholarly journals Effect of Incisal Porcelain Veneering Thickness on the Fracture Resistance of CAD/CAM Zirconia All-Ceramic Anterior Crowns

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Noha Badran ◽  
Sanaa Abdel Kader ◽  
Fayza Alabbassy
Keyword(s):  
Fracture Resistance ◽  
Testing Machine ◽  
Mode Iii ◽  
Nickel Chromium ◽  
Significant Difference ◽  
All Ceramic ◽  
Metal Ceramic ◽  
Cad Cam ◽  
Ceramic Crown

Statement of Problem. In some clinical situations, the vertical length of either a prepared tooth or an implant abutment is short, while the occlusal clearance to be restored by a porcelain crown is large. Incisal thickness of the veneering porcelain should be considered to prevent mechanical failure of the crown. Purpose. The aim of this study is to evaluate the effect of two different incisal veneering porcelain thickness on the fracture resistance of the anterior all-ceramic CAD/CAM zirconia crown system as compared with the conventionally used metal ceramic crown system. Method. CAD/CAM zirconia all-ceramic and metal ceramic crowns were fabricated on the prepared dies with standardized dimensions and designs using standardized methods according to the manufacturer’s instructions. All crowns were then adhesively luted with resin-based cement (Multilink cement system), subjected to thermal cycling and cyclic loading, and were loaded until fracture using the universal testing machine to indicate the fracture resistance for each crown material in each veneering thickness. Results. Statistical analysis was carried out, and the results showed that the fracture resistance of the nickel-chromium metal ceramic group was significantly higher than that of the CAD/CAM zirconia all-ceramic group. Also, the fracture resistance of crowns with 1.5 mm incisal veneering thickness was significantly higher than those with 3 mm incisal veneering thickness in both groups. Furthermore, there was no significant difference in the fracture mode of the two groups where 50% of the total specimens demonstrated Mode II (veneer chipping), while 35% demonstrated Mode I (visible crack) and only 15% demonstrated Mode III (bulk fracture). Conclusion. High failure load values were demonstrated by the specimens in this study, which suggest sufficient strength of both incisal veneering thickness in both crown systems to withstand clinical applications; however, the fracture patterns still underline the requirement of a core design that support a consistent thickness of the veneering ceramic, and it is recommended to conduct long-term prospective clinical studies to confirm findings reported in the present study.

Marginal and Internal Discrepancies of Posterior Zirconia-Based Crowns Fabricated with Three Different CAD/CAM Systems Versus Metal-Ceramic

2015 ◽  
Vol 28 (5) ◽  
pp. 509-511 ◽  
Author(s):  
Rocio Ortega ◽  
Esther Gonzalo ◽  
Miguel Gomez-Polo ◽  
María Suárez
Keyword(s):  
Metal Ceramic ◽  
Cad Cam ◽  
Cam Systems

scholarly journals Clinical Evaluation of Marginal and Internal Gaps of Zirconia-based 3-unit CAD/CAM Fixed Partial Dentures

2007 ◽  
Vol 6 (2) ◽  
pp. 114-119 ◽  
Author(s):  
Mitsuyoshi Tsumita ◽  
Yuji Kokubo ◽  
Chikahiro Ohkubo ◽  
Yuki Nagayama ◽  
Satoe Sakurai ◽  
...  
Keyword(s):  
Clinical Evaluation ◽  
Cad Cam

The Marginal Fit of CAD/CAM Monolithic Ceramic and Metal-Ceramic Crowns

2017 ◽  
Vol 28 (3) ◽  
pp. 299-304 ◽  
Author(s):  
Yolanda Freire ◽  
Esther Gonzalo ◽  
Carlos Lopez-Suarez ◽  
Maria J. Suarez
Keyword(s):  
Marginal Fit ◽  
Metal Ceramic ◽  
Cad Cam ◽  
Ceramic Crowns

The Marginal Fit of CAD-CAM Zirconia Cores with Different Proximal Margin Configurations

2007 ◽  
Vol 330-332 ◽  
pp. 1409-1412
Author(s):  
O.E. Puntsag ◽  
E.K. Bae ◽  
Jae Hoon Lee ◽  
Keun Woo Lee
Keyword(s):  
Statistical Difference ◽  
Marginal Gap ◽  
Proximal Margin ◽  
Marginal Fit ◽  
Group I ◽  
Metal Ceramic ◽  
Cad Cam ◽  
The Mean ◽  
Tooth Axis

This study evaluated the marginal fit of CAD-CAM Zirconia cores with different proximal height. Thirty Zirconia cores and ten metal ceramics crowns were used to evaluate the marginal gap. The marginal fit was determined to be perpendicular to the tooth axis between the most apical point on the coping margin (core) and the reference marks on the mesial, distal, labial, and palatal surfaces of the die at several key stages of crown fabrication; before porcelain built-up, after body porcelain built-up, and after glazing. Additionally, an opaque stage for the metal ceramic copings was compared as well. Each measurement was carried out with a microscope. The means of gaps among the groups were 58±27 -m, 69±23 -m, 89±29 -m and 80±28 -m, groups I, II, III and IV, respectively. In relation to the proximal and labiopalatal surfaces there were no statistical difference among the groups, except group I. No significant differences were observed in firing stages of all groups. The findings of this study showed that the mean marginal gap of Zirconia cores with different proximal heights fell well within the acceptable clinical ranges.

Probability of survival of implant-supported metal ceramic and CAD/CAM resin nanoceramic crowns

2015 ◽  
Vol 31 (8) ◽  
pp. e168-e177 ◽  
Author(s):  
Estevam A. Bonfante ◽  
Marcelo Suzuki ◽  
Fábio C. Lorenzoni ◽  
Lídia A. Sena ◽  
Ronaldo Hirata ◽  
...  
Keyword(s):  
Probability Of Survival ◽  
Metal Ceramic ◽  
Cad Cam ◽  
Supported Metal
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