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Basic Study | Publishing Language: Chinese | Open Access

The effect of Er: YAG laser irradiation on bonding properties of IPS e.max CAD ceramics

Yepo HOU1, Renze SHEN2, Luyuan CHEN1, Yi CHEN3, Yingtong JIANG4, Jingmei LI4, Jie GAO4( )
Department of Stomatology, Nanfang Hospital of Southern Medical University, Guangzhou 510515, China
Department of Stomatology, Zhongshan Hospital, Xiamen University, Xiamen 361000, China
Department of Orthopedics Surgery, 1 st Affiliated Hospital of Guangzhou Medical University, Guangdong Provincial Key Lab of Orthopedics Technology and Implant Materials, Guagnzhou 510120, China
Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Stomatology Hospital of Guangzhou Medical University, Guangzhou 510140, China
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Abstract

Objective

To investigate different Er:YAG laser power settings on the bonding properties of IPS e.max CAD ceramics.

Methods

96 IPS e.max CAD ceramics blocks (5 mm × 5 mm × 5 mm) were prepared and randomly divided into 8 groups (n = 12), the untreated blocks served as the control, while one of the experimental groups was treated with 4.5% HF for 20 seconds, six remaining test group (C、D、E、F、G、H) were treated with different Er: YAG laser power settings: 100 mJ、200 mJ、300 mJ、400 mJ、500 mJ and 600 mJ. Morphology of the ceramic surface was observed by atomic force microscopy and its shear bond strength (SBS) was tested.

Results

Higher shear bond strength values were found in group C-H compared to group B, the highest is group F (24.12 ± 1.91) MPa. The difference was statistically significant. The atomic force microscope observation of the surface structure showed that the control group was smooth and flat, and the HF-like etching group formed a uniform needle-like convex structure. The laser group gradually formed a regularly arranged cylindrical convex structure, in which the surface of the G and H groups was damaged.

Conclusion

The Er: YAG laser power settings of 400 mJ can be used as an effective pretreatment method before bonding of IPS e.max CAD ceramic.

Keywords

Er: YAG laserIPS e.max CADBonding strengthAtomic force microscopeMicrophology
CLC number: 783.1 Document code: A Article ID: 2096-1456(2018)02-0095-04

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Journal of Prevention and Treatment for Stomatological Diseases
Volume 26 Issue 2,
February 2018
Pages 95-98
DOI: 10.12016/j.issn.2096-1456.2018.02.005

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Cite this article:
HOU Y, SHEN R, CHEN L, et al. The effect of Er: YAG laser irradiation on bonding properties of IPS e.max CAD ceramics. Journal of Prevention and Treatment for Stomatological Diseases, 2018, 26(2): 95-98. https://doi.org/10.12016/j.issn.2096-1456.2018.02.005

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Received: 26 September 2017
Revised: 18 October 2017
Published: 20 February 2018
© 2018 by Editorial Department of Journal of Prevention and Treatment for Stomatological Diseases

This article is licensed under a Creative Commons Attribution 4.0 International License.