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Article

Changes in Crystal Phase, Morphology, and Flexural Strength of As-Sintered Translucent Monolithic Zirconia Ceramic Modified by Femtosecond Laser

by 1,†, 2,† and 3,*
1
Second Clinical Division, Peking University Hospital of Stomatology, Beijing 100081, China
2
Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China
3
Center of Digital Dentistry, Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China
*
Author to whom correspondence should be addressed.
These authors contributed to this work equally.
Academic Editor: Vittorio Checchi
Appl. Sci. 2021, 11(15), 6925; https://doi.org/10.3390/app11156925
Received: 31 May 2021 / Revised: 18 July 2021 / Accepted: 22 July 2021 / Published: 28 July 2021
(This article belongs to the Special Issue Dental Materials: Latest Advances and Prospects)
Conventional bonding technology suitable for silica-based ceramics is not applicable to zirconia, due to its polycrystalline phase composition, chemical stability, and acid corrosion resistance. The development of an effective treatment to improve its surface roughness and mechanical properties remains an unresolved problem. Therefore, to solve this problem, this in vitro study evaluated the changes in surface morphology and flexural strength of translucent monolithic zirconia surfaces treated with femtosecond laser technology. As-sintered translucent zirconia specimens were subjected to airborne particle abrasion and femtosecond laser treatments, while control group specimens received no treatment. After treatment, the roughness and morphology of the treated zirconia surfaces were examined. The flexural strength and X-ray diffraction of the treated specimens were measured and analyzed. Statistical inferential analysis included one-way analysis of variance at a set significance level of 5%. The surface roughness after femtosecond laser treatment was significantly improved when compared with the control group and the group that received the airborne particle abrasion treatment (p < 0.05). In comparison with the airborne particle abrasion group, the flexural strength of the group that received the femtosecond laser treatment was significantly improved (p < 0.05). The femtosecond laser approach using appropriate parameters enhanced the roughness of the zirconia without reducing its flexural strength; therefore, this approach offers potential for the treatment of zirconia surfaces. View Full-Text
Keywords: zirconia; airborne particle abrasion; femtosecond laser; flexural strength; surface roughness zirconia; airborne particle abrasion; femtosecond laser; flexural strength; surface roughness
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MDPI and ACS Style

Liang, S.; Ye, H.; Yuan, F. Changes in Crystal Phase, Morphology, and Flexural Strength of As-Sintered Translucent Monolithic Zirconia Ceramic Modified by Femtosecond Laser. Appl. Sci. 2021, 11, 6925. https://doi.org/10.3390/app11156925

AMA Style

Liang S, Ye H, Yuan F. Changes in Crystal Phase, Morphology, and Flexural Strength of As-Sintered Translucent Monolithic Zirconia Ceramic Modified by Femtosecond Laser. Applied Sciences. 2021; 11(15):6925. https://doi.org/10.3390/app11156925

Chicago/Turabian Style

Liang, Shanshan, Hongqiang Ye, and Fusong Yuan. 2021. "Changes in Crystal Phase, Morphology, and Flexural Strength of As-Sintered Translucent Monolithic Zirconia Ceramic Modified by Femtosecond Laser" Applied Sciences 11, no. 15: 6925. https://doi.org/10.3390/app11156925

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