Paper Titles
Effects of Short PAN Fiber Contents on Mechanical Properties of Metakaolin-Blast Furnace Slag Based Geopolymers
p.608
Influence of Voltage on the Biological Performance of Micro-Arc Oxide Films Based on TC4 Titanium Alloy
p.612
Influence of Voltage on Microstructure of Micro-Arc Oxide Films on TC4 Titanium Alloy
p.617
Effect of Thermal Oxidation Temperature on the Properties of Micro-Arc Oxidation Ceramic Coating on TC4 Alloy
p.623
The Effect of Thickness on the Fracture Strength and Failure Modes of Zirconia Crowns
p.629
Effects of Sintering Temperature and Excess Zr on Mechanical Properties of Reactive Hot-Pressed ZrB2-ZrCx-Zr Cermets
p.633
Mechanical Properties and Microstructure of 2.5D Cf/ZrO2 Composites Prepared by Precursor Infiltration and Pyrolysis
p.639
Effects of Si3N4 Additions on Creep Resistance of Al-Al2O3 Composites
p.644
Mechanical Properties of Polymer-Infiltrated-Feldspar for Restorative Composite CAD/CAM Blocks
p.648

The Effect of Thickness on the Fracture Strength and Failure Modes of Zirconia Crowns

Article Preview

Abstract:

To explore the effect of thickness on the fracture strength and failure modes of zirconia crowns, four crown models with different thickness (1.2 mm, 1.0 mm, 0.8 mm, 0.6 mm) with the same shape were designed by Dental Designer software in CAD/CAM system. They were manufactured to 40 zirconia crowns by CAM carving machine. The fracture strength and the failure modes of each crown was measured, while porcelain fused to metal (PFM) crowns as control. The average fracture strength of different zirconia crowns were recorded as below: 1308.38 ± 111.38 N (Group 0.6 mm), 1841.60 ± 68.21 N (Group 0.8 mm), 2429.88 ± 315.03 N (Group 1.0 mm), 3068.31 ± 233.88 N (Group 1.2 mm). There was no significant difference between Group 1.0 mm and Group 1.2 mm (P > 0.05), and statistical significance was obtained among every other two groups (P < 0.05). The failure modes of different thickness zirconium crowns are similar. There are more broken pieces from thicker crowns compared to thinner ones. It is concluded that the thickness can influence the fracture strength of zirconia crown. With the increase of the thickness, the fracture strength of the zirconium crowns also increases. We recommend zirconia crowns thicker than or at least 1.0 mm in dental practice.

You might also be interested in these eBooks
High-Performance Ceramics IX View Preview

Info:

Periodical:

Key Engineering Materials (Volume 697)

Pages:

629-632

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.697.629

Citation:

Cite this paper

Online since:

July 2016

Authors:

Li Xian Zhang, Rui Li, Yu Niu, Yu Xiao Liu

Keywords:

Failure Mode, Fracture Strength, Thickness, Zirconia Crown

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2016 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] Palinkas M, Nassar MS, Cecflio FA, et a1. Age and gender influence on maximal bite force and masticatory muscles thickness. Arch Oral Biol, 2010, 55(10): 797-802.

DOI: 10.1016/j.archoralbio.2010.06.016

Google Scholar

[2] Varga S, Spalj S, Lapter Varga M, et a1. Maximum voluntary molar bite force in subjects with normal occlusion. Eur J Orthod, 2011, 33(4): 427-33.

DOI: 10.1093/ejo/cjq097

Google Scholar

[3] Donovan TE. Porcelain-fused-to-metal (PFM) alternatives. J Esthet Restor Dent, 2009, 21 (1): 4-6.

Google Scholar

[4] Hui Wang, Jihua Chen, Changxi Shi. The effect of thickness on the fracture resistance of hot pressable ceramic crowns. J Practical Dent, 2003, 9(3): 263-265.

Google Scholar

[5] Kim JH, Park JH, Park YB, et a1. Fracture load of zirconia crowns according to the thickness and marginal design of coping. J Prosthet Dent, 2012, 108(2): 96-101.

DOI: 10.1016/s0022-3913(12)60114-0

Google Scholar

[6] Jang GW, Kim HS, Choe HC, et a1. Fracture strength and mechanism of dental ceramic crown with zirconia thickness. Procedia Engineering, 2011 (10): 1556-1560.

DOI: 10.1016/j.proeng.2011.04.260

Google Scholar