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HE staining observation in each group at 6 and 12 weeks (×40)
植入后 6、12 周各组 HE 染色观察（×40）
从左至右分别为 CA 组、CA+HA 组、CA+HAC 组 箭头示条索状新生骨 a. 植入 6 周；b. 植入 12 周
From left to right for CA, CA+HA, and CA+HAC groups Arrow indicated streak new bone a. At 6 weeks; b. At 12 weeks
