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(A, B, E, F) Representative histological images (×4, ×20) of H&E and Masson staining after PEEK implanted in vivo (longitudinal sections at the defects of skull) for 4 and 8 weeks, (C, D, G, H) Representative histological images (×4, ×20) of H&E and Masson staining after CSNPK implanted in vivo (longitudinal sections at the defects of skull) for 4 and 8 weeks (M: materials, B: bone). PEEK = polyetheretherketone.
