Bioactive surface modification of carbon/carbon composites with multilayer SiC-SiC nanowire-Si doped hydroxyapatite coating

2018 ◽  
Vol 740 ◽  
pp. 109-117 ◽  
Author(s):  
Leilei Zhang ◽  
Shaoxian Li ◽  
Hejun Li ◽  
Lina Pei
Keyword(s):  
Surface Modification ◽  
Hydroxyapatite Coating ◽  
Carbon Composites ◽  
Bioactive Surface Modification ◽  
Si Doped

scholarly journals Three-Dimensional Printed Porous Titanium Screw with Bioactive Surface Modification for Bone–Tendon Healing: A Rabbit Animal Model

2020 ◽  
Vol 21 (10) ◽  
pp. 3628
Author(s):  
Yu-Min Huang ◽  
Chih-Chieh Huang ◽  
Pei-I Tsai ◽  
Kuo-Yi Yang ◽  
Shin-I Huang ◽  
...  
Keyword(s):  
Surface Modification ◽  
Tibial Tunnel ◽  
Rabbit Model ◽  
Interference Screw ◽  
Fixation Method ◽  
Titanium Screw ◽  
Pull Out ◽  
Screw Breakage ◽  
Bioactive Surface Modification ◽  
Screw Group

The interference screw fixation method is used to secure a graft in the tibial tunnel during anterior cruciate ligament reconstruction surgery. However, several complications have been reported, such as biodegradable screw breakage, inflammatory or foreign body reaction, tunnel enlargement, and delayed graft healing. Using additive manufacturing (AM) technology, we developed a titanium alloy (Ti6Al4V) interference screw with chemically calcium phosphate surface modification technology to improve bone integration in the tibial tunnel. After chemical and heat treatment, the titanium screw formed a dense apatite layer on the metal surface in simulated body fluid. Twenty-seven New Zealand white rabbits were randomly divided into control and additive manufactured (AMD) screw groups. The long digital extensor tendon was detached and translated into a tibial plateau tunnel (diameter: 2.0 mm) and transfixed with an interference screw while the paw was in dorsiflexion. Biomechanical analyses, histological analyses, and an imaging study were performed at 1, 3, and 6 months. The biomechanical test showed that the ultimate pull-out load failure was significantly higher in the AMD screw group in all tested periods. Micro-computed tomography analyses revealed early woven bone formation in the AMD screw group at 1 and 3 months. In conclusion, AMD screws with bioactive surface modification improved bone ingrowth and enhanced biomechanical performance in a rabbit model.

Carbon foam/hydroxyapatite coating for carbon/carbon composites: Microstructure and biocompatibility

2013 ◽  
Vol 286 ◽  
pp. 421-427 ◽  
Author(s):  
Leilei Zhang ◽  
Hejun Li ◽  
Kezhi Li ◽  
Shouyang Zhang ◽  
Jinhua Lu ◽  
...  
Keyword(s):  
Carbon Foam ◽  
Hydroxyapatite Coating ◽  
Carbon Composites

scholarly journals Preparation and bioactive surface modification of the microwave sintered porous Ti-15Mo alloys for biomedical application

2017 ◽  
Vol 61 (4) ◽  
pp. 545-556 ◽  
Author(s):  
Jilin Xu ◽  
Jinlong Zhang ◽  
Luzi Bao ◽  
Tao Lai ◽  
Junming Luo ◽  
...  
Keyword(s):  
Surface Modification ◽  
Biomedical Application ◽  
Porous Ti ◽  
Bioactive Surface Modification

scholarly journals Effect of SiC Particle Contents and Size on the Microstructure and Dissolution of SiC-Hydroxyapatite Coatings

Coatings ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1166
Author(s):  
Li Yang ◽  
Zuli Mao
Keyword(s):  
Weight Loss ◽  
Hydroxyapatite Coating ◽  
Carbon Composites ◽  
Bone Implant ◽  
Sic Particles ◽  
Hydroxyapatite Coatings ◽  
Dissolution Properties ◽  
Structure Morphology ◽  
Ultrasound Assisted ◽  
Sic Particle

Carbon/carbon composites, when used as bone implant materials, do not adhere well to the bone tissues because of their non-bioactive characteristics. Therefore, we electro-deposited SiC-hydroxyapatite coatings (with an ultrasound-assisted step) on carbon/carbon composites. We analyzed how the content and size of the SiC particles affected the structure, morphology, bonding strength and dissolution of the SiC-hydroxyapatite coatings. The hydroxyapatite coating dissolution properties were assessed by the released Ca2+ and the weight loss. The SiC-hydroxyapatite coating on naked carbon/carbon composites showed a more compact microstructure in comparison to the hydroxyapatite coating on carbon/carbon composites. The reasons for the changes in the microstructure and the improvement in the adhesion of the coatings on C/C were discussed. Moreover, the addition of SiC particles increased the binding strengths of the hydroxyapatite coating on C/C composite, as well as reduced the dissolution rate of the hydroxyapatite coating.

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