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Biological and mechanical performance verifications: (a) cultured cells in HA scaffold within 1 day, (b) cultured cells in HA scaffold after 1 day, (c) cultured cells in HA scaffold at 7 days, (d) SEM imaging of the cell surface interaction and adhesion at PEEK/HA composite after 7 days, (e) measured stress–strain curve, and (f) comparison of compressive strength.
