Next Article in Journal
Facile Synthesis of Di-Mannitol Adipate Ester-Based Zinc Metal Alkoxide as a Bi-Functional Additive for Poly(Vinyl Chloride)
Next Article in Special Issue
Tissue Engineering Strategies for Intervertebral Disc Treatment Using Functional Polymers
Previous Article in Journal
Sound Absorption Properties of DFs/EVA Composites
Previous Article in Special Issue
In vitro Comparative Study of Fibroblastic Behaviour on Polymethacrylate (PMMA) and Lithium Disilicate Polymer Surfaces
Article Menu

Export Article

Open AccessArticle

Polylactide Composite Pins Reinforced with Bioresorbable Continuous Glass Fibers Demonstrating Bone-like Apatite Formation and Spiral Delamination Degradation

1
School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China
2
Beijing Engineering Laboratory of Functional Medical Materials and Devices, Beijing Naton Technology Group Co. LTD, Beijing 100094, China
3
Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100083, China
*
Author to whom correspondence should be addressed.
Polymers 2019, 11(5), 812; https://doi.org/10.3390/polym11050812
Received: 13 April 2019 / Revised: 30 April 2019 / Accepted: 30 April 2019 / Published: 6 May 2019
(This article belongs to the Special Issue Biomedical Polymer Materials)
  |  
PDF [13233 KB, uploaded 6 May 2019]
  |  

Abstract

The emergence of polylactide composites reinforced with bioresorbable silicate glass fibers has allowed for the long-term success of biodegradable polymers in load-bearing orthopedic applications. However, few studies have reported on the degradation behavior and bioactivity of such biocomposites. The aim of this work was to investigate the degradation behavior and in vitro bioactivity of a novel biocomposite pin composed of bioresorbable continuous glass fibers and poly-L-D-lactide in simulated body fluid for 78 weeks. As the materials degraded, periodic spiral delamination formed microtubes and funnel-shaped structures in the biocomposite pins. It was speculated that the direction of degradation, from both ends towards the middle of the fibers and from the surface through to the bulk of the polymer matrix, could facilitate bone healing. Following immersion in simulated body fluid, a bone-like apatite layer formed on the biocomposite pins which had a similar composition and structure to natural bone. The sheet- and needle-like apatite nanostructure was doped with sodium, magnesium, and carbonate ions, which acted to lower the Ca/P atomic ratio to less than the stoichiometric apatite and presented a calcium-deficient apatite with low crystallinity. These findings demonstrated the bioactivity of the new biocomposite pins in vitro and their excellent potential for load-bearing applications. View Full-Text
Keywords: degradation behavior; spiral delamination; bone-like apatite; bioresorbable continuous glass fibers; polylactide composite pin degradation behavior; spiral delamination; bone-like apatite; bioresorbable continuous glass fibers; polylactide composite pin
Figures

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Cao, X.-Y.; Tian, N.; Dong, X.; Cheng, C.-K. Polylactide Composite Pins Reinforced with Bioresorbable Continuous Glass Fibers Demonstrating Bone-like Apatite Formation and Spiral Delamination Degradation. Polymers 2019, 11, 812.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Polymers EISSN 2073-4360 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top