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Article

The Fracture Resistance of Additively Manufactured Monolithic Zirconia vs. Bi-Layered Alumina Toughened Zirconia Crowns When Cemented to Zirconia Abutments. Evaluating the Potential of 3D Printing of Ceramic Crowns: An In Vitro Study

1
Department of Comprehensive Dentistry, College of Dentistry, Texas A&M University, Dallas, TX 75246, USA
2
Department of Biomedical Sciences, College of Dentistry, Texas A&M University, Dallas, TX 75246, USA
3
Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Bunkyo-ku Yushima, Tokyo 113-8510, Japan
4
Department of Prosthodontics, Indiana University School of Dentistry, Indianapolis, IN 46202, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Hong-Tzong Yau
Received: 11 August 2021 / Revised: 10 September 2021 / Accepted: 24 September 2021 / Published: 8 October 2021
(1) Background: This study compared the fracture resistance of additively manufactured monolithic zirconia and bi-layered alumina toughened zirconia crowns on implants. (2) Methods: Maxillary model with a dental implant replacing right second bicuspid was obtained. Custom abutments and full-contour crowns for additively manufactured monolithic zirconia and bi-layered alumina reinforced zirconia crowns (n = 10) were fabricated. The crowns were cemented to implant-supported zirconia abutments and the assembly fixed onto resin blocks. Fracture resistance was measured using a universal testing machine at a crosshead speed of 2 mm/min. A Kruskal–Wallis test was used to analyze the data. (3) Results: Although additively manufactured monolithic zirconia crowns demonstrated a higher mean fracture resistance than bi-layered alumina toughened zirconia crowns, statistical analysis revealed no significant difference in fracture resistance between the two groups. All specimens fractured at the implant–abutment interface. (4) Conclusions: Additively manufactured bi-layered alumina toughened zirconia crowns demonstrated similar fracture resistance to additively manufactured monolithic zirconia crowns when cemented to implant-supported zirconia abutments. View Full-Text
Keywords: additive manufacturing; zirconia crown; alumina reinforced zirconia crown; fracture resistance additive manufacturing; zirconia crown; alumina reinforced zirconia crown; fracture resistance
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MDPI and ACS Style

Zandinejad, A.; Revilla-León, M.; Methani, M.M.; Nasiry Khanlar, L.; Morton, D. The Fracture Resistance of Additively Manufactured Monolithic Zirconia vs. Bi-Layered Alumina Toughened Zirconia Crowns When Cemented to Zirconia Abutments. Evaluating the Potential of 3D Printing of Ceramic Crowns: An In Vitro Study. Dent. J. 2021, 9, 115. https://0-doi-org.brum.beds.ac.uk/10.3390/dj9100115

AMA Style

Zandinejad A, Revilla-León M, Methani MM, Nasiry Khanlar L, Morton D. The Fracture Resistance of Additively Manufactured Monolithic Zirconia vs. Bi-Layered Alumina Toughened Zirconia Crowns When Cemented to Zirconia Abutments. Evaluating the Potential of 3D Printing of Ceramic Crowns: An In Vitro Study. Dentistry Journal. 2021; 9(10):115. https://0-doi-org.brum.beds.ac.uk/10.3390/dj9100115

Chicago/Turabian Style

Zandinejad, Amirali, Marta Revilla-León, Mohammad M. Methani, Leila Nasiry Khanlar, and Dean Morton. 2021. "The Fracture Resistance of Additively Manufactured Monolithic Zirconia vs. Bi-Layered Alumina Toughened Zirconia Crowns When Cemented to Zirconia Abutments. Evaluating the Potential of 3D Printing of Ceramic Crowns: An In Vitro Study" Dentistry Journal 9, no. 10: 115. https://0-doi-org.brum.beds.ac.uk/10.3390/dj9100115

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