Enhanced mechanical properties and biosafety evaluation of surface-modified fiberglass-reinforced resin-based composite
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B I O M A T E R I A L S S Y N T H E S I S A N D CH A R A C T E R I Z A T I O N Original Research
Enhanced mechanical properties and biosafety evaluation of surface-modified fiberglass-reinforced resin-based composite piles Xiaokun Hu1 Mei Liu1 Yu Ji1 Yueming Du2 Lili Wang1 Xuefeng Zhou3 Feimin Zhang1 ●
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Received: 14 October 2018 / Accepted: 18 May 2019 / Published online: 5 June 2019 © Springer Science+Business Media, LLC, part of Springer Nature 2019
Abstract The purpose of this study is to analyze various surface grafting modifications of fiberglass-reinforced resin based composite piles. In addition, the effects of surface modifications of fiberglass-reinforced resin piles in terms of biosafety and mechanical strength were studied. According to different surface treatment methods, the fiberglass was divided into five groups (A–E): a blank control group, a KH570 processing group, a KH570 processing+Bis-GMA grafting 1 h group, a KH570 processing +Bis-GMA grafting 3 h group and a KH570 processing+Bis-GMA grafting 7 h group. All surface-treated materials were characterized using scanning electron microscope, thermogravimetric analyses and Fourier transform infrared spectrum and mechanical testing using a universal mechanical tester. The biosafety was evaluated by cell viability experiments and repeated oral toxicity tests and Ames tests. The Bis-GMA grafting modification further enhanced the mechanical properties of resin piles. By increasing the grafting time, the grafting effect and mechanical properties were further enhanced. The surfaces grafted for 7 h (Group E) remarkably improved the mechanical properties (flexural strength ~696.24 MPa; flexural load ~185.67N). The graft modifications improved the mechanical properties of fiber pile resin-based materials. The prolonged grafting time further improved the mechanical properties corresponding to enhanced grafting and the formation of a stable interface between fibers and the resin matrix. The surface-modified dental resin-based fiber did not show any signs of toxicity, cytotoxicity or mutagenicity, suggesting the potential biological safety of these materials in the clinical practice.
Graphical Abstract
These authors contributed equally: Mei Liu, Xiaokun Hu * Feimin Zhang [email protected] 1
Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, 136 Hanzhong Road, Nanjing, 210029 Jiangsu, China
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Chairman Unit of Dental Professional Committee of Wuxi Medical Association, Wuxi, 214001 Jiangsu, China
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State Key Laboratory of Bioelectronics, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096 Jiangsu, China
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1 Introduction Endodontic treatment results in the loss of tooth structure and tooth strength [1]. To restore non-vital teeth with larger defects, the post-core repair technique is used to retain residual tooth tissues and restore the functional and aesthetic characteristics [2]. Metal casting
