Ceramic Inlays and Partial Ceramic Crowns: Influence of Remaining Cusp Wall Thickness on the Marginal Integrity and Enamel Crack Formation In Vitro

10.2341/08-34 ◽  
2009 ◽  
Vol 34 (1) ◽  
pp. 32-42 ◽  
Author(s):  
S. Krifka ◽  
T. Anthofer ◽  
M. Fritzsch ◽  
K-A. Hiller ◽  
G. Schmalz ◽  
...  
Keyword(s):  
Wall Thickness ◽  
Clinical Relevance ◽  
Crack Formation ◽  
In Vitro Study ◽  
Vitro Study ◽  
Effective Thickness ◽  
Adhesively Bonded ◽  
Ceramic Crowns ◽  
Ceramic Restorations

Clinical Relevance The minimum effective thickness of cusp walls with adhesively bonded ceramic restorations is not yet defined. According to this in vitro study, a cusp wall thickness of at least 2.0 mm at the base is recommended.

scholarly journals Marginal and Internal Fit of Ceramic Prostheses Fabricated from Different Chairside CAD/CAM Systems: An In Vitro Study

2021 ◽  
Vol 11 (2) ◽  
pp. 857
Author(s):  
Keunbada Son ◽  
Kyu-Bok Lee
Keyword(s):  
Computer Aided Design ◽  
In Vitro Study ◽  
Vitro Study ◽  
Marginal Gap ◽  
Significant Difference ◽  
Cad Cam ◽  
Ceramic Crowns ◽  
Internal Fit ◽  
Cam Systems

The purpose of this in vitro study was to evaluate marginal and internal fits of ceramic crowns fabricated with chairside computer-aided design and manufacturing (CAD/CAM) systems. An experimental model based on ISO 12836:2015 was digitally scanned with different intraoral scanners (Omnicam (CEREC), EZIS PO (DDS), and CS3500 (Carestream)). Ceramic crowns were fabricated using the CAD/CAM process recommended by each system (CEREC, EZIS, and Carestream systems; N = 15). The 3-dimensional (3D) marginal and internal fit of each ceramic crown was measured using a 3D inspection software (Geomagic control X). Differences among the systems and various measurements were evaluated using the Kruskal–Wallis test. Statistically significant differences were validated using pairwise comparisons (α = 0.05). Occlusal gaps in the CEREC, EZIS, and Carestream groups were 113.0, 161.3, and 438.2 µm, respectively (p < 0.001). The axial gaps were 83.4, 78.0, and 107.9 µm, respectively. The marginal gaps were 77.8, 99.3, and 60.6 µm, respectively, and the whole gaps were 85.9, 107.3, and 214.0 µm, respectively. Significant differences were observed with the EZIS system compared with the other two systems in terms of the marginal gap sizes. The CEREC system showed no significant differences among the four measured regions. However, the EZIS and Carestream systems did show a statistically significant difference (p < 0.05). All three systems were judged to be capable of fabricating clinically acceptable prostheses, because the marginal gap, which is the most important factor in the marginal fit of prostheses, was recorded to be below 100 µm in all three systems.

Marginal, Internal Fit and Microleakage of Zirconia Infrastructures: An In-Vitro Study

2011 ◽  
Vol 36 (1) ◽  
pp. 72-79 ◽  
Author(s):  
L. Korkut ◽  
H. S. Cotert ◽  
H. Kurtulmus
Keyword(s):  
Clinical Relevance ◽  
In Vitro Study ◽  
Manufacturing Technology ◽  
Vitro Study ◽  
Internal Fit ◽  
Fitting Accuracy

Clinical Relevance Fitting accuracy and microleakage dominate prognostic covariates for the long-term durability of crown restorations. The fitting accuracy and microleakage potential of zirconia infrastructures might be influenced by manufacturing technology.

scholarly journals In Vitro Study on Marginal and Internal Fit of CAD/CAM All-ceramic Crowns

2005 ◽  
Vol 24 (3) ◽  
pp. 456-459 ◽  
Author(s):  
Takashi NAKAMURA ◽  
Hideaki TANAKA ◽  
Soichiro KINUTA ◽  
Takeshi AKAO ◽  
Kei OKAMOTO ◽  
...  
Keyword(s):  
In Vitro Study ◽  
Vitro Study ◽  
All Ceramic ◽  
Cad Cam ◽  
Ceramic Crowns ◽  
Internal Fit

scholarly journals Bonding of Resin Composite Luting Cements to Zirconium Oxide by Two Air-particle Abrasion Methods

10.2341/05-22 ◽  
2006 ◽  
Vol 31 (2) ◽  
pp. 248-255 ◽  
Author(s):  
O. Kumbuloglu ◽  
L. V. J. Lassila ◽  
A. User ◽  
P. K. Vallittu
Keyword(s):  
Phosphoric Acid ◽  
Clinical Relevance ◽  
Zirconium Oxide ◽  
Resin Composite ◽  
In Vitro Study ◽  
Vitro Study ◽  
Luting Cements ◽  
Relyx Unicem

Clinical Relevance The results of this in vitro study suggest that, in combination with air-particle abrasion methods, Panavia F and RelyX Unicem resin composite luting cements with phosphoric-acid methacrylate content provide a strong resin bond to zirconium oxide.

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