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(A) The inflammatory cells including granulocytes (arrow heads) and monocytes (arrow) are observed in the area that we set. (B) The ratio of inflammatory cells to total cell in the set area was evaluated as grade using semi-quantitative grading system. (C, D) For each sample, four zones were set to be of 3.3 mm height and 0.5 mm width from the floor of the implant by selecting an area that is in well contact with the implant and the skin.
