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H＆E staining and Masson's trichrome staining results of rat cranial bone defect model. (A) H＆E staining of regenerated bone tissue was observed in different groups at 4 weeks after the surgery. (B) Masson's trichrome staining was observed in different groups at 4 weeks after surgery. (N: new bone tissue. M: material. F: fibrous tissue. B: old bone border).
