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The size of the central bone defect gradually increased with respect to an increase in created defect size (a,a’: 1.0cm, b,b’: 1.2cm, c,c’: 1.4cm, d,d’: 1.7cm, e,e’: 2.0 cm, a-e: just after operation, a’-e’: 12 weeks postoperative, scale bar: 10mm).
