Mechanical Treatment Peri-Implant Mucositis (MechTreatPiM)

Inclusion Criteria: Subject must be ≥ 20 years Subject must have one implant presenting PIM as defined according to the World Workshop 2017 criteria (presence of BoP and/or suppuration (SoP), without bone loss exceeding 0.5 mm beyond crestal bone level changes resulting from initial remodeling, regardless of PPD. In absence of baseline radiographs (i.e., 0-1 year after loading) a bone level of <2mm from the top of the intraosseous part of the implant is considered as the reference threshold) Cleansable prosthesis (an interproximal brush must be able to pass from side to side at interproximal aspects tangential to the peri-implant sulcus, and a brush has to be able to reach the buccal and palatal/lingual sulcus). No evidence of occlusal overload No cement remnants identified on radiographs or clinically Implant-supported fixed restoration inserted at least 6 months before patient enrolment and not interfering with assessment of clinical parameters at more than 3/6 sites Periodontally healthy subjects or treated periodontitis (no residual site with PPD ≥ 5 mm) Full-mouth plaque (FMPS) and bleeding (FMBS) score ≤ 20%¬¬¬¬¬¬¬ at screening visit Non-smokers or light-smokers (<10 cigarettes per day) Competent to give consent Exclusion Criteria: Previous radiotherapy, current use of chemotherapy, systemic long-term corticosteroid treatment Hematologic disorders Pregnant subjects Patients classified as > class 2 according to the ASA (American Society of Anesthesiologists) physical status classification No systemic antibiotic treatment within 3 months prior to intervention