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Figure 5. Free gingival graft in two-stage guided bone regeneration procedure: (A, B) clinical and radiographic view of the bone loss caused by the periimplantitis occurred on the distal implant; (C) clinical view of the healed soft tissues three months after the explantation; and (D) cone beam computed tomography cross section of the treated area, at the baseline and nine months after the occlusive titanium barrier placement (Regenplate® Shape 2, Bio-Micron, Sweden & Martina, Due Carrare, Padova, Italy).