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) 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...

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Bibliographic Details
Published in:Dentistry journal 2021-10, Vol.9 (10), p.115
Main Authors: Zandinejad, Amirali, Revilla-León, Marta, Methani, Mohammad Mujtaba, Nasiry Khanlar, Leila, Morton, Dean
Format: Article
Language:English
Subjects:
Additive manufacturing
alumina reinforced zirconia crown
Aluminum oxide
Dental implants
Dental prosthetics
Enamel
fracture resistance
Fracture toughness
Fractures
Laboratories
Rapid prototyping
Statistical analysis
Three dimensional printing
Zirconia
zirconia crown
Zirconium dioxide
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Summary:(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 ( = 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.
ISSN:2304-6767
2304-6767
DOI:10.3390/dj9100115