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Bone biopsies collected five months after the GBR procedure were stained with haematoxylin and eosin (H&E) and examined by light microscopy (a, 3.5×; b, 10×) and under polarized light (c, 3.5×). Black arrows in subfigure a indicate the residual graft material. Black and red arrows in subfigure b respectively show osteoblasts and osteocytes within the newly formed bone. No osteoclasts were detected in the slides being analyzed.
