Electrolytic cleaning is a promising treatment for dental implant decontamination, but this mode of therapy has not yet been clinically tested as an adjunct to the non-surgical treatment of periimplantitis.

A prospective clinical and radiographic case series study will be performed to evaluate the clinical performance of the adjunctive use of electrolytic cleaning as an adjunct to a non-surgical therapy protocol that includes curettage of the peri-implant soft tissue. This is study is a proof of principle study, thus, a case series study is selected to start with. If the results of this case series study are favourable, a future study with a clinical trial design is then planned to do.

Electrolytic cleaning is a promising treatment for dental implant decontamination, but this mode of therapy has not yet been clinically tested as an adjunct to the non-surgical treatment of periimplantitis. Electrolytic cleaning is a promising treatment for dental implant decontamination, but this mode of therapy has not yet been clinically tested as an adjunct to the non-surgical treatment of periimplantitis.This is study is a proof of principle study, thus, a case series study is selected to start with. As this is a pilot study to test for the first time the electrolytic cleaning under non-surgical therapy, the sample size has been estimated in a minimum of 25 patients. If the results of this case series study are favourable, a future study with a clinical trial design is then planned to do.

Therapeutic success is defined as as a composite index (Sanz & Chapple 2012 criteria of disease resolution) that includes: (1) probing pocket depth < 5 mm, (2) no bleeding on probing/suppuration and (3) no additional bone loss, at 6 and 12 months). Secondary objectives are: Changes in the clinical outcomes measurements.Changes in the radiological outcomes measurements. Changes in the patient-reported outcomes (PROMs). Evaluation of the outcomes related to the prosthetic restoration.

This study will be carried out in the following centers:

• Postgraduate Periodontal Clinic at the Faculty of Odontology-Universidad Complutense of Madrid (Spain)
• CEOSA-Madrid Private Dental Centre

After the non-surgical therapy, patients will be recalled for control visits, with supra- gingival removal of biofilm with air polishing without anaesthesia at:

• 3 months.
• 6 months.
• 12 months. After non-surgical therapy, patients will be included in a strict peri-implant maintenance therapy program to avoid re-contamination of the affected implants. Removal of biofilm with air polishing without anaesthesia and oral hygiene instruction reinforcement will be performed at: 3 months, 6 months, 9 months and 12 months.

Inclusion Criteria:

• Male or female age > 18 years.
• Presence of at least 1 implant with the diagnose of peri-implantitis (Berglundh et al. 2018; Renvert et al. 2018)
• Peri-implant bone loss < 2/3
• History of treated periodontal diseases (Caton 2018).
• Screw retained prosthesis that can be easily unscrewed.
• Prosthesis that allows access to biofilm control by the patient, or which can be modified accordingly.
• Absence of implant mobility

Exclusion Criteria:

Systemic exclusion criteria

• Pregnant or lactating women Non-surgical electrolytic cleaning CONFIDENTIAL
• Patients chronically treated (i.e., two weeks or more) with any medication known to affect periodontal/peri-implant status (i.e., antibiotics intake within 3 months prior to the initiation)
• Medical conditions requiring prolonged use of steroids and/or with medications that could interfere with bone metabolism.
• History of leukocyte dysfunction and deficiencies.
• History of neoplastic disease requiring the use of radiation or chemotherapy.
• Patients with chronic renal failure requiring dialysis.
• Patients with metabolic bone disorders such as osteoporosis treated with antiresoptive medications.
• History of uncontrolled endocrine disorders: hypothyroidism or diabetes.
• Physical handicaps that would interfere with the ability to perform adequate oral hygiene or patients unable to use daily interproximal cleaning.
• Alcoholism or drug abuse.
• History of immunodeficiency syndromes.
• Tobacco consumption (smoking more than 10 cigarettes per day)
• Conditions or circumstances, which in the opinion of the investigator, would avoid the completion of study participation, or interfere with analysis of study results, such as history of non-compliance or unreliability, or do have any additional medical condition that contraindicates non-surgical treatment

Local exclusion criteria

• Mucosal diseases such as erosive lichen planus in the area to be treated.
• History of local irradiation therapy.
• Implants with peri-implant bone loss beyond 2/3 of the implant length