Due to excellent biocompatibility, osteoconductivity and bioactivity, hydroxyapatite (HA) bioceramics have been widely used in the field of bone repairing. 1,2 Generally, HA bioceramics are limited in non-bearing bone filling due to their inherent brittleness and poor mechanical strength. [3][4][5] Up to now, the extensive efforts have been taken to enhance the mechanical strength of HA bioceramics. Some studies attempted to introduce second phase or fibers to improve the mechanical strength of HA bioceramics, but these approaches might change the ceramic composition and debase the biological properties of HA bioceramics. 6,7 To the best of our knowledge, the construction of
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