[1] QI C, ZHU Y J, LU B Q et al. Hydroxyapatite hierarchically nanostructured porous hollow microspheres: rapid, sustainable microwave-hydrothermal synthesis by using creatine phosphate as an organic phosphorus source and application in drug delivery and protein adsorption[J]. Chem. Eur. J., 19, 5332-5341(2013).

[2] YU W L, SUN T W, DING Z Y et al. Copper-doped mesoporous hydroxyapatite microspheres synthesized by a microwave-hydrothermal method using creatine phosphate as an organic phosphorus source: application in drug delivery and enhanced bone regeneration[J]. J. Mater. Chem. B, 5, 1039-1052(2017).

[3] LU B Q, ZHU Y J. One-dimensional hydroxyapatite materials: preparation and applications[J]. Can. J. Chem., 95, 1091-1102(2017).

[4] YU W L, SUN T W, QI C et al. Enhanced osteogenesis and angiogenesis by mesoporous hydroxyapatite microspheres-derived simvastatin sustained release system for superior bone regeneration[J]. Sci. Rep., 7, 44129(2017).

[5] YANG F, YANG D Z, TU J et al. Strontium enhances osteogenic differentiation of mesenchymal stem cells and in vivo bone formation by activating Wnt/catenin signaling[J]. Stem Cells, 29, 981-991(2011).

[6] LIN K L, XIA L G, LI H Y et al. Enhanced osteoporotic bone regeneration by strontium-substituted calcium silicate bioactive ceramics[J]. Biomaterials, 34, 10028-10042(2013).

[7] BONNELYE E, CHABADEL A, SALTEL F et al. Dual effect of strontium ranelate: stimulation of osteoblast differentiation and inhibition of osteoclast formation and resorption in vitro[J]. Bone, 42, 129-138(2008).

[8] HABIBOVIC P, BARRALET J E. Bioinorganics and biomaterials: bone repair[J]. Acta Biomater., 7, 3013-3026(2011).

[9] KANE R J, WEISS-BILKA H E, MEAGHER M J et al. Hydroxyapatite reinforced collagen scaffolds with improved architecture and mechanical properties[J]. Acta Biomater., 17, 16-25(2015).

[10] ZHENG X Y, HUI J F, LI H et al. Fabrication of novel biodegradable porous bone scaffolds based on amphiphilic hydroxyapatite nanorods[J]. Mater. Sci. Eng. C, 75, 699-705(2017).

[11] SUN T W, YU W L, ZHU Y J et al. Hydroxyapatite nanowire@magnesium silicate core-shell hierarchical nanocomposite: synthesis and application in bone regeneration[J]. ACS Appl. Mater. Interfaces, 9, 16435-16447(2017).

[12] SUN T W, ZHU Y J, CHEN F. Highly flexible multifunctional biopaper comprising chitosan reinforced by ultralong hydroxyapatite nanowires[J]. Chem. Eur. J., 23, 3850-3862(2017).

[13] SUN T W, ZHU Y J, CHEN F et al. Ultralong hydroxyapatite nanowires/collagen scaffolds with hierarchical porous structure, enhanced mechanical properties and excellent cellular attachment[J]. Ceram. Int., 43, 15747-15754(2017).

[14] SUN T W, ZHU Y J, CHEN F et al. Ultralong hydroxyapatite nanowire/collagen biopaper with high flexibility, improved mechanical properties and excellent cellular attachment[J]. Chem. Asian J., 12, 655-664(2017).

[15] SUN T W, YU W L, ZHU Y J et al. Porous nanocomposite comprising ultralong hydroxyapatite nanowires decorated with zinc-containing nanoparticles and chitosan: synthesis and application in bone defect repair[J]. Chem. Eur. J., 24, 8809-8821(2018).

[16] SUN T W, ZHU Y J, CHEN F. Hydroxyapatite nanowire/collagen elastic porous nanocomposite and its enhanced performance in bone defect repair[J]. RSC Adv., 8, 26133-26144(2018).

[17] XU J Q, YANG Y Q, WAN R et al. Hydrothermal preparation and characterization of ultralong strontium-substituted hydroxyapatite whiskers using acetamide as homogeneous precipitation reagent[J]. Sci. World J., 2014, 863137(2014).

[18] ZHANG N, ZHAI D, CHEN L et al. Hydrothermal synthesis and characterization of Si and Sr co-substituted hydroxyapatite nanowires using strontium containing calcium silicate as precursors[J]. Mater. Sci. Eng. C, 37, 286-291(2014).

[19] LU B Q, ZHU Y J, CHEN F. Highly flexible and nonflammable inorganic hydroxyapatite paper[J]. Chem. Eur. J., 20, 1242-1246(2014).

[20] ZHANG Y G, ZHU Y J, CHEN F et al. Ultralong hydroxyapatite nanowires synthesized by solvothermal treatment using a series of phosphate sodium salts[J]. Mater. Lett., 144, 135-137(2015).

[21] JIANG Y Y, ZHU Y J, CHEN F et al. Solvothermal synthesis of submillimeter ultralong hydroxyapatite nanowires using calcium oleate precursor in a series of monohydroxy alcohols[J]. Ceram. Int., 41, 6098-6102(2015).

[22] KAVITHA M, SUBRAMANIAN R, NARAYANAN R et al. Solution combustion synthesis and characterization of strontium substituted hydroxyapatite nanocrystals[J]. Powder Technol., 253, 129-137(2014).

[23] TERRA J, DOURADO E R, EON J G et al. The structure of strontium-doped hydroxyapatite: an experimental and theoretical study[J]. Phys. Chem. Chem. Phys., 11, 568-577(2009).

[24] QI C, ZHU Y J, LU B Q et al. Hydroxyapatite nanosheet-assembled porous hollow microspheres: DNA-templated hydrothermal synthesis, drug delivery and protein adsorption[J]. J. Mater. Chem., 22, 22642-22650(2012).