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Combined surgical therapy of peri-implantitis at respective defect sites: class I: intrabony component showing either a buccal dehiscency with a semicircular component (Ib) or a buccal dehiscency with a cicumferential component (Ic). Class II: supracrestal component. The red rectangles indicate the surface areas undergoing an implantoplasty, while the green areas indicate the defect areas undergoing augmentative therapy
