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In vitro and in vivo studies of Zn-Mn biodegradable metals designed for orthopedic applications

Jia, Bo, Yang, Hongtao, Han, Yu, Zhang, Zechuan, Qu, Xinhua, Zhuang, Yifu, Wu, Qiang, Zheng, Yufeng, Dai, Kerong·2020·Acta Biomaterialia

Abstract

In recent years, Zn-based materials provide a new option as biodegradable metals for orthopedic applications. To improve the low strength and brittle nature of pure Zn, small amounts of alloying element Mn (0.1, 0.4 and 0.8 wt. %) were added into Zn to fabricate binary Zn-Mn alloys. An extremely high elongation (83.96 ± 2.36%) was achieved in the resulting Zn-0.8wt.%Mn alloy. Moreover, Zn-Mn alloys displayed significantly improved cytocompatibility as compared to pure Zn, according to cell proliferation and morphology analyses. More importantly, a significantly improved osteogenic activity was verified after adding Mn regarding ALP activity and osteogenic expression. Furthermore, Zn-0.8wt.%Mn alloy scaffolds were implanted into the rat femoral condyle for repairing bone defects with pure Ti as control. Enhanced osteogenic activities were confirmed for Zn-0.8Mn alloy in contrast to pure Ti based on Micro-CT and histological results, and favorable in vivo biosafety of Zn-0.8Mn alloy was verified by H&E staining and blood tests. The exceptional mechanical performance and favorable osteogenic capability render Zn-Mn alloy a promising candidate material in the treatment of bone defects or fracture repair. Statements of significance The element Mn, on the one hand, as an essential trace element in the human body, promotes cell proliferation, adhesion, spreading, and regulates bone metabolism; on the other hand, it could significantly improve the ductility of Zn alloys. Here, we systematically reported the biocompatibility and biofunctionality of binary biodegradable Zn-Mn alloys in the bone environment. The Zn-Mn alloys promoted MC3T3-E1 cell proliferation, adhesion, spreading, and osteogenic differentiation in vitro. Furthermore, a rat femoral condyle defect model was established; porous Zn-Mn alloy scaffolds were manufactured to repair the bone defects. Significant bone regenerations, considerable bone ingrowth, and desirable biosafety were confirmed in vivo. Therefore, biodegradable Zn-Mn with promising osteogenic properties may become new options for orthopedic implant materials.

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Metadata

Authors
Jia, B., Yang, H., Han, Y., Zhang, Z., Qu, X., Zhuang, Y., Wu, Q., Zheng, Y., & Dai, K.
Venue
Acta Biomaterialia
Publisher
Elsevier BV
Published
2020-05
Volume
108
Pages
358-372
ISSN
1742-7061 (ISSN-L)
OpenAlex
W3011285626
Cited by
253
References
41
FWCI
6.40
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: In vitro and in vivo studies of Zn-Mn biodegradable metals designed for orthopedic applications. https://app.cochat.ai/papers/10.1016/j.actbio.2020.03.009
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Jia, B., Yang, H., Han, Y., Zhang, Z., Qu, X., Zhuang, Y., Wu, Q., Zheng, Y., & Dai, K. (2020). In vitro and in vivo studies of Zn-Mn biodegradable metals designed for orthopedic applications. Acta Biomaterialia. https://doi.org/10.1016/j.actbio.2020.03.009

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