Abstract
The bone regenerative scaffold with the tailored degradation rate matching with the growth rate of the new bone is essential for adolescent bone repair. To satisfy these requirement, we proposed bone tissue scaffolds with controlled degradation rate using osteoinductive materials (Ca-P bioceramics), which is expected to present a controllable biodegradation rate for patients who need bone regeneration. Physicochemical properties, porosity, compressive strength and degradation properties of the scaffolds were studied. 3D printed Ca-P scaffold (3DS), gas foaming Ca-P scaffold (FS) and autogenous bone (AB) were used in vivo for personalized beagle skull defect repair. Histological results indicated that the 3DS was highly vascularized and well combined with surrounding tissues. FS showed obvious newly formed bone tissues. AB showed the best repair effect, but it was found that AB scaffolds were partially absorbed and degraded. This study indicated that the 3D printed Ca-P bioceramics with tailored biodegradation rate is a promising candidate for personalized skull bone tissue reconstruction.
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Acknowledgements
This work was supported by the National Key Research and Development Program of China (No. 18YFB1105600, 2018YFC1106800), National Natural Science Foundation of China (51875518), Sichuan Province Science & Technology Department Projects (2016CZYD0004, 2017SZ0001, 2018GZ0142, 2019YFH0079), Research Foundation for Young Teachers of Sichuan University (2018SCUH0017) and The “111” Project (No. B16033).
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The animal experiments were approved by the Animal Care and Use Committee of Sichuan University. All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.
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Zhang, B., Sun, H., Wu, L. et al. 3D printing of calcium phosphate bioceramic with tailored biodegradation rate for skull bone tissue reconstruction. Bio-des. Manuf. 2, 161–171 (2019). https://doi.org/10.1007/s42242-019-00046-7
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DOI: https://doi.org/10.1007/s42242-019-00046-7