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5-Bromo-2′-deoxyuridine (BrdU)-labeled sections of the transplanted teeth at 3 (A), 5 (B), 7 (C), and 14 (D) days after surgery (B, bone-like tissue; D, dentin; PC, pulp chamber; PH, pulp horn). (A) A large number of BrdU-positive cells are observed in both the pulp horn and chamber. (B–D) The BrdU-positive cells are decreased in number in the pulp chamber. Bar = 100 μm.
