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Peri-implant mucosa: (A and B) Intense vascularization in the connective tissue’s papillae and superficial chorion; (C) Intense vascularization in areas with inflammatory infiltrates; (D) Capillary angiogenesis in inflammatory infiltrate. Positive immunolabeling for anti-CD34 antibody: (A and C) ×100; (B and D) ×200
