Shear strength of bonding interface between zirconia and nano-hydroxyapatite

doi:10.3969/j.issn.2095-4344.2016.12.019

Chinese Journal of Tissue Engineering Research ›› 2016, Vol. 20 ›› Issue (12): 1800-1805.doi: 10.3969/j.issn.2095-4344.2016.12.019

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Shear strength of bonding interface between zirconia and nano-hydroxyapatite

Sun Xiao-kun^{1, 2}, Wang Fang-hui¹, Wang Qing-shan¹, Wang Jing³, Wang Ai-qin², Gao Yu-guang²

¹Department of Pediatric Dentistry, ³Department of Endodontics, Affiliated Hospital to Binzhou Medical University, Binzhou 256603, Shandong Province, China; ²Binzhou Medical University, Binzhou 256603, Shandong Province, China

Received:2016-02-02 Online:2016-03-18 Published:2016-03-18
Contact: Wang Qing-shan, Professor, Chief physician, Department of Pediatric Dentistry, Affiliated Hospital to Binzhou Medical University, Binzhou 256603, Shandong Province, China
About author:Sun Xiao-kun, Master, Department of Pediatric Dentistry, Affiliated Hospital to Binzhou Medical University, Binzhou 256603, Shandong Province, China; Binzhou Medical University, Binzhou 256603, Shandong Province, China
Supported by:
the Natural Science Foundation of Shandong Province, No. ZR2013HM044; the Medical Science and Technology Development Project, No. 2013WS0308

Abstract

Abstract:

BACKGROUND: Nano-hydroxyapatite as a surface modification material that is bonded to the surface of the zirconia ceramics upon sintering at high temperature can improve bone-inducing activity and bone bonding strength of the zirconia ceramics. Moreover, the sintering temperature is crucial for performance and bonding of the composite.
OBJECTIVE: To detect the shear strength of nano-hydroxyapatite ceramics coating bonded to zirconia ceramics at different sintering temperatures.
METHODS: Nano-hydroxyapatite slurry was prepared using sol/gel technology. Thereafter, 20 zirconium green bodies were coated with nano-hydroxyapatite slurry and randomly divided into four groups. Then, the specimens were put into non-pressure sintering furnace and sintered at 1 300, 1 400, 1 500, and
1 550 ℃, respectively. At last, we measured the shear strength of all the specimens after sintering by universal testing machine, and analyze the type of fractures.
RESULTS AND CONCLUSION: With the rising of sintering temperature, the shear strength of the specimens was gradually increased, and there were significant differences between the four groups [(4.04±1.19), (6.60±0.95), (16.51±1.93), (80.47±19.31) MPa, P < 0.05]. Within the scope of 1 550 ℃, the sintering temperature was positively relative to the shear strength of specimens. These findings indicate that in the certain temperature range, the higher the sintering temperature, the greater the shear strength of the bonding interface between zirconia and nano-hydroxyapatite. When the sintering temperature is 1 550℃, the shear strength of the bonding interface is the highest.

中国组织工程研究杂志出版内容重点：生物材料；骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性；组织工程

Sun Xiao-kun, Wang Fang-hui, Wang Qing-shan, Wang Jing, Wang Ai-qin, Gao Yu-guang. Shear strength of bonding interface between zirconia and nano-hydroxyapatite[J]. Chinese Journal of Tissue Engineering Research, 2016, 20(12): 1800-1805.

Figures/Tables 2

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Shear strength of bonding interface between zirconia and nano-hydroxyapatite

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