Diederik Hentenaar

69 Erythritol air-polishing in non-surgical peri-implantits treatment 3 Figure 2. Number of patients in the air-polishing group and ultrasonic group with positive pooled peri-implant and periodontal samples, before and 3 months after therapy. 0 20 40 60 80 100 120 Aa Pg Pi Tf Pm Fn Td Fa Percentage of patients with positive implant samples (%) Air-polishing T3 Ultrasonic T3 0 20 40 60 80 100 120 Aa Pg Pi Tf Pm Fn Td Fa Percentage of patients with positive implant samples (%) Air-polishing T0 Ultrasonic T0 Figure 2. Number of patients in the air-polishing group and ultrasonic group with positive pooled peri-implant and periodontal samples, before and 3 months after therapy. DISCUSSION Key findings This randomized controlled trial compared the clinical, radiographical and microbiological outcomes of erythritol air-polishing and piezoelectric ultrasonic scaling with a PEEK plastic tip in the non-surgical treatment of peri-implantitis. Three months after therapy, there was no significant difference between both therapies for the primary outcome mean BoP (%). Other clinical, radiographical or microbiological parameters neither showed any difference between both groups. Therefore, in terms of our null- hypothesis air-polishing seems to be as effective as ultrasonic scaling in the reduction of inflammatory signs (BoP, SoP, Plq and PPD). Both therapies however resulted in limited success with most of the patients showing persistent signs of inflammation at 3 month 3