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To qualitatively analyze the effect of 3D printed hydroxyapatite-gel (HAP-GEL) scaffold combined with bone marrow mesenchymal stem cells (BMSCs) and human umbilical vein endothelial cells (HUVECs) in repairing rabbit skull defect. The third generation BMSCs and HUVECs were co-cultured with 3D printed HAP-GEL scaffold to construct tissue engineering bone. The rabbit model of skull defect was established and randomly divided into 4 groups. HAP-GEL stent, HAP-GEL stent + BMSCs and HUVECs cells were implanted respectively, and positive cont