Microstructure and Biocompatibility of Gradient Bioceramic Composite Coating Fabricated by Wide-Band Laser Cladding

Qi Bin Liu; Wen Fei Li; Bang Cheng Yang

doi:10.4028/www.scientific.net/KEM.342-343.685

Paper Titles

Preparation of α-Tricalcium Phosphate Bone Cement: Effect of Citric Acid
p.669

Effects of Thin Hydroxyapatite Coating on Initial Response of Osteoblast-Like Cells
p.673

Evaluation of Hydroxyl Groups on Hydroxyapatite and Calcium Metaphosphate by Grafting TEOS and APTES
p.677

Mechanical Properties on Gradient Bioceramic Composite Coating Produced by Wide-Band Laser Cladding
p.681

Microstructure and Biocompatibility of Gradient Bioceramic Composite Coating Fabricated by Wide-Band Laser Cladding
p.685

Ca-P Formation on Poly-L-Lactide/β-Tricalcium Phosphate Composite Scaffold in Simulated Body Fluid
p.689

Mechanism Study of Calcium Phosphate Deposition on Titanium Surface in Simulated Body Fluid
p.693

The Effect of Microarc Oxidation Ceramic Coating on Sensory Reconstruction around Implants Using Cultured Schwann Cells
p.697

In Vitro Study Bioactivity of HA/UHMWPE Nanocomposites
p.701

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Microstructure and Biocompatibility of Gradient Bioceramic Composite Coating Fabricated by Wide-Band Laser Cladding

Abstract:

In this study, microstructure and biocompatibility of gradient bioceramic composite coating fabricated by Wide-Band Laser Cladding is investigated. The experimental results indicate that the coating consists of an alloyed transition layer and the bioceramic coating. The bioceramic coating is mainly comprised of HA, CaTiO3, CaO, α-TCP, β-TCP and TiO. The coral-shaped structure and short-rod piled structure existing on the surface of coating. After the implantation of the bioceramic coatings into dogs’ femur for 6, 12, and 24 weeks, hypersusceptibility, rejection and pathological changes are not found. No fiber cyst, necrosis of bone tissue and chronic inflammation obviously appear through slice observation of hard tissues. The bioceramic coating with different ratios of Ca : P have different abilities to induce osteogenesis. At Ca: P=1.4 and 0.6wt.% Y2O3 (No.3 sample), the bioceramic coating is of best bioactivity and biocompatibility.