Outcome Indicators of Non-surgical Therapy of Peri-implantitis

Outcome Indicators of Non-surgical Therapy of Peri-implantitis: a 6-months

Objectives: To identify patient and implant indicators influencing the non-surgical therapeutic outcomes of peri-implantitis at 6-months follow-up.

Material and methods: This prospective cohort study included patients with at least one implant diagnosed with peri-implantitis according to the 2017 World Workshop. Non-surgical therapy consisted in a mechanical debridement of the peri-implant pockets combined with the metronidazole 500 mg every 8 hours during 7 days. At baseline and at 6 months, clinical and radiographic variables were collected to calculate the success of the therapy. The influence of patient and implant/prosthetic variables on disease resolution were assessed trough simple and multiple logistic regression analysis at patient and implant level using generalized estimation equations models.

Inclusion Criteria:

• Subjects over 18 years old
• At least one implant in function for more than 1 year diagnosed with peri-implantitis following the case definition of the 2017 World Workshop on the Classification of Periodontal and Peri-Implant Diseases and Conditions (Berglundh et al., 2018).

Exclusion Criteria:

• Previous surgical therapy of peri-implantitis
• Allergy to metronidazole
• Clinical implant mobility
• Pregnancy or lactating females
• Previous non-surgical treatment (i.e., submucosal debridement) of the affected implants at least 12 months before
• Use of systemic antibiotics during the previous 3 months as well as use of systemic antibiotics for endocarditis prophylaxis,
• Systemic diseases, medications, or conditions that may compromise wound healing and influence the outcome of the therapy.