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10.3390/ma17020365
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Article

The Effect of Restoration Thickness on the Fracture Resistance of 5 mol% Yttria-Containing Zirconia Crowns

by
Po-Hsu Chen
1,
Esra Elamin
1,
Akram Sayed Ahmed
2,
Daniel A. Givan
1,
Chin-Chuan Fu
1 and
Nathaniel C. Lawson
1,*
1
Division of Prosthodontics, University of Alabama at Birmingham School of Dentistry, Birmingham, AL 35209, USA
2
Faculty of Dentistry, Department of Dental Biomaterials, Tanta University, Tanta 31527, Egypt
*
Author to whom correspondence should be addressed.
Materials 2024, 17(2), 365; https://doi.org/10.3390/ma17020365
Submission received: 18 December 2023 / Revised: 4 January 2024 / Accepted: 8 January 2024 / Published: 11 January 2024
(This article belongs to the Special Issue Advanced Materials for Oral Application (Volume II))
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Abstract

Background: To determine what thickness of 5 mol% yttria zirconia (5Y-Z) translucent crowns cemented with different cements and surface treatments would have equivalent fracture resistance as 3 mol% yttria (3Y-Z) crowns. Methods: The study included 0.8 mm, 1.0 mm, and 1.2 mm thickness 5Y-Z (Katana UTML) crowns and 0.5 and 1.0 mm thickness 3Y-Z (Katana HT) crowns as controls. The 5Y-Z crowns were divided among three treatment subgroups (n = 10/subgroup): (1) cemented using RMGIC (Rely X Luting Cement), (2) alumina particle-abraded then luted with the same cement, (3) alumina particle-abraded and cemented using a resin cement (Panavia SA Cement Universal). The 3Y-Z controls were alumina particle-abraded then cemented with RMGIC. The specimens were then loaded in compression at 30° until failure. Results: All 5Y-Z crowns (regardless of thickness or surface treatment) had a similar to or higher fracture force than the 0.5 mm 3Y-Z crowns. Only the 1.2 mm 5Y-Z crowns with resin cement showed significantly similar fracture force to the 1 mm 3Y-Z crowns. Conclusion: In order to achieve a similar fracture resistance to 0.5 mm 3Y-Z crowns cemented with RMGIC, 5Y-Z crowns may be as thin as 0.8 mm. To achieve a similar fracture resistance to 1.0 mm 3Y-Z crowns cemented with RMGIC, 5Y-Z crowns must be 1.2 mm and bonded with resin cement.
Keywords: zirconia; cementation; crown fracture zirconia; cementation; crown fracture

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MDPI and ACS Style

Chen, P.-H.; Elamin, E.; Sayed Ahmed, A.; Givan, D.A.; Fu, C.-C.; Lawson, N.C. The Effect of Restoration Thickness on the Fracture Resistance of 5 mol% Yttria-Containing Zirconia Crowns. Materials 2024, 17, 365. https://doi.org/10.3390/ma17020365

AMA Style

Chen P-H, Elamin E, Sayed Ahmed A, Givan DA, Fu C-C, Lawson NC. The Effect of Restoration Thickness on the Fracture Resistance of 5 mol% Yttria-Containing Zirconia Crowns. Materials. 2024; 17(2):365. https://doi.org/10.3390/ma17020365

Chicago/Turabian Style

Chen, Po-Hsu, Esra Elamin, Akram Sayed Ahmed, Daniel A. Givan, Chin-Chuan Fu, and Nathaniel C. Lawson. 2024. "The Effect of Restoration Thickness on the Fracture Resistance of 5 mol% Yttria-Containing Zirconia Crowns" Materials 17, no. 2: 365. https://doi.org/10.3390/ma17020365

APA Style

Chen, P.-H., Elamin, E., Sayed Ahmed, A., Givan, D. A., Fu, C.-C., & Lawson, N. C. (2024). The Effect of Restoration Thickness on the Fracture Resistance of 5 mol% Yttria-Containing Zirconia Crowns. Materials, 17(2), 365. https://doi.org/10.3390/ma17020365

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