In vitro degradation behavior of carbon fiber-reinforced PLA composites and influence of interfacial adhesion strength

2001 ◽  
Vol 82 (1) ◽  
pp. 150-158 ◽  
Author(s):  
Y. Z. Wan ◽  
Y. L. Wang ◽  
X. H. Xu ◽  
Q. Y. Li
Keyword(s):  
Carbon Fiber ◽  
Adhesion Strength ◽  
Interfacial Adhesion ◽  
Degradation Behavior ◽  
Fiber Reinforced ◽  
In Vitro Degradation ◽  
Carbon Fiber Reinforced ◽  
Interfacial Adhesion Strength

scholarly journals Carbon fiber–reinforced PEEK versus titanium implants: an in vitro comparison of susceptibility artifacts in CT and MR imaging

2020 ◽  
Author(s):  
Theresa Krätzig ◽  
Klaus C. Mende ◽  
Malte Mohme ◽  
Helge Kniep ◽  
Marc Dreimann ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Vertebral Body ◽  
Titanium Implants ◽  
Fiber Reinforced ◽  
Dose Delivery ◽  
Susceptibility Artifacts ◽  
Carbon Fiber Reinforced ◽  
Radiation Planning

Abstract Artifacts in computed tomography (CT) and magnetic resonance imaging (MRI) due to titanium implants in spine surgery are known to cause difficulties in follow-up imaging, radiation planning, and precise dose delivery in patients with spinal tumors. Carbon fiber–reinforced polyetheretherketon (CFRP) implants aim to reduce these artifacts. Our aim was to analyze susceptibility artifacts of these implants using a standardized in vitro model. Titanium and CFRP screw-rod phantoms were embedded in 3% agarose gel. Phantoms were scanned with Siemens Somatom AS Open and 3.0-T Siemens Skyra scanners. Regions of interest (ROIs) were plotted and analyzed for CT and MRI at clinically relevant localizations. CT voxel–based imaging analysis showed a significant difference of artifact intensity and central overlay between titanium and CFRP phantoms. For the virtual regions of the spinal canal, titanium implants (ti) presented − 30.7 HU vs. 33.4 HU mean for CFRP (p < 0.001), at the posterior margin of the vertebral body 68.9 HU (ti) vs. 59.8 HU (CFRP) (p < 0.001) and at the anterior part of the vertebral body 201.2 HU (ti) vs. 70.4 HU (CFRP) (p < 0.001), respectively. MRI data was only visually interpreted due to the low sample size and lack of an objective measuring system as Hounsfield units in CT. CT imaging of the phantom with typical implant configuration for thoracic stabilization could demonstrate a significant artifact reduction in CFRP implants compared with titanium implants for evaluation of index structures. Radiolucency with less artifacts provides a better interpretation of follow-up imaging, radiation planning, and more precise dose delivery.

In vitro degradation behavior of a hydroxyapatite/poly(lactide-co-glycolide) composite reinforced by micro/nano-hybrid poly(glycolide) fibers for bone repair

2017 ◽  
Vol 5 (44) ◽  
pp. 8695-8706 ◽  
Author(s):  
Yuhang Zhu ◽  
Zongliang Wang ◽  
Linlong Li ◽  
Daqian Gao ◽  
Qinli Xu ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Bone Repair ◽  
Degradation Behavior ◽  
Fiber Reinforced ◽  
In Vitro Degradation ◽  
High Mechanical Strength

A poly(glycolide) (PGA) fiber-reinforced hydroxyapatite/poly(lactide-co-glycolide) (HA/PLGA) composite with high mechanical strength has been prepared previously.

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