Enhanced biocompatibility and osseointegration of calcium titanate coating on titanium screws in rabbit femur
| Autor: | Zhen-Jun Wu, Song Wu, Chi Liang, Rongzhen He, Hansong Xia, Xu Cao, Min Zou, Zili Wang, Jinshen He, Bin Tu, Kun Xiong |
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| Rok vydání: | 2017 |
| Předmět: |
Male
Materials science Biocompatibility Surface Properties Scanning electron microscope Bone Screws 0206 medical engineering Biomedical Engineering Dentistry chemistry.chemical_element 02 engineering and technology engineering.material Biochemistry Osseointegration Biomaterials chemistry.chemical_compound Coated Materials Biocompatible Coating Tensile Strength Bone-Implant Interface Materials Testing Genetics Animals Femur Titanium business.industry Oxides Prostheses and Implants Calcium Compounds equipment and supplies 021001 nanoscience & nanotechnology 020601 biomedical engineering Radiography Calcium titanate Durapatite chemistry Microscopy Electron Scanning engineering Rabbits 0210 nano-technology business Layer (electronics) Biomedical engineering |
| Zdroj: | Journal of Huazhong University of Science and Technology [Medical Sciences]. 37:362-370 |
| ISSN: | 1672-0733 |
| Popis: | This study aimed to examine the biocompatibility of calcium titanate (CaTiO3) coating prepared by a simplified technique in an attempt to assess the potential of CaTiO3 coating as an alternative to current implant coating materials. CaTiO3-coated titanium screws were implanted with hydroxyapatite (HA)-coated or uncoated titanium screws into medial and lateral femoral condyles of 48 New Zealand white rabbits. Imaging, histomorphometric and biomechanical analyses were employed to evaluate the osseointegration and biocompatibility 12 weeks after the implantation. Histology and scanning electron microscopy revealed that bone tissues surrounding the screws coated with CaTiO3 were fully regenerated and they were also well integrated with the screws. An interfacial fibrous membrane layer, which was found in the HA coating group, was not noticeable between the bone tissues and CaTiO3-coated screws. X-ray imaging analysis showed in the CaTiO3 coating group, there was a dense and tight binding between implants and the bone tissues; no radiation translucent zone was found surrounding the implants as well as no detachment of the coating and femoral condyle fracture. In contrast, uncoated screws exhibited a fibrous membrane layer, as evidenced by the detection of a radiation translucent zone between the implants and the bone tissues. Additionally, biomechanical testing revealed that the binding strength of CaTiO3 coating with bone tissues was significantly higher than that of uncoated titanium screws, and was comparable to that of HA coating. The study demonstrated that CaTiO3 coating in situ to titanium screws possesses great biocompatibility and osseointegration comparable to HA coating. |
| Databáze: | OpenAIRE |
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