Peri-Implant Mucositis (PM) is inflammation that affects the soft tissues surrounding the implant with a prevalence between 19% and 65% and if left untreated, it precedes to periimplantitis. Over time several clinical protocols for the management of PM have been proposed. They include mechanical debridement alone or with additional chemical decontamination. A retrospective analysis was conducted to evaluate the effects of an extra virgin olive oil-based gel in the treatment of PM in support of mechanical decontamination procedures in 20 subjects. Statistically significant improvements in clinical outcomes (bleeding on probing -BoP, plaque index -PI and probing depth -PD) were observed by comparing the values at baseline to three observation periods (p <0.001). Beyond the limits, this retrospective clinical study demonstrates that ozonated extra virgin olive oil gel allowed to effectively treat inflammation of peri-implant tissues and, due to its organoleptic characteristics and the absence of side effects, can represent a valuable therapy for the chemical management of peri-implant mucositis and for daily use in the context of supportive therapy.