Abstract: Peri-implantitis is an inflammatory disease of the peri-implant soft and hard tissues, primarily caused by plaque biofilms and influenced by multiple factors. This article presents the comprehensive sequential treatment process and follow-up results of a patient with peri-implantitis and discusses the optimal treatment approach. In this case, the implant prosthesis was first removed for non-surgical treatment to preliminarily control the infection, followed by bone regenerative surgery to reconstruct peri-implant bone tissue. Subsequently, free gingival grafting was performed to improve peri-implant soft tissue conditions, and the prosthesis morphology was adjusted and reinserted. Throughout the treatment and follow-up periods, both self-maintenance and professional maintenance were emphasized. After a 2-year follow-up, the peri-implant gingival redness, swelling, and suppuration subsided, the deep periodontal pockets resolved, and alveolar bone regeneration was achieved and maintained, resulting in a satisfactory therapeutic outcome.

Key words: Peri-implantitis, Sequential treatment, Regenerative surgery, Keratinized gingiva, Prosthesis