Diederik Hentenaar

91 Erythritol air-polishing in surgical peri-implantitis treatment Table 1. (Continued) Test Control Maxilla 36 (66.7) 20 (50.0) Mandible 18 (33.3) 20 (50.0) Implants placed anterior posterior; n implants (%) Anterior (central incisor to cuspid) 22 (40.7) 16 (40.0) Posterior (premolar/molar) 32 (59.3) 24 (60.0) Bone defect configuration and grade (according Schwarz et al. 2007 and modified by Monje et. al 2019) Configuration 1a buccal dehiscence 2 (3.7%) 4 (10.0%) 1b 2/3 wall defect 9 (16.6%) 12 (30.0%) 1c Circumferential 3 (5.5%) 2 (5.0%) 2 horizontal/supracrestal 8 (14.8%) 6 (15.0%) 3a horizontal/supracrestal + buccal dehiscence 5 (9.3%) 4 (10.0%) 3b horizontal/supracrestal + 2/3 wall defect 24 (44.4%) 10 (25.0%) 3c horizontal/supracrestal + circumferential 3 (5.5%) 2 (5.0%) Grade A slight 3-4mm/<25% of the implant length 11 (20.4%) 15 (37.5%) B moderate 4-5mm/25-50% of the implant length 21 (38.9%) 19 (47.5%) C advanced >6mm/>50% of the implant length 22 (40.7%) 6 (15.0%) Secondary outcomes Clinical and radiographical outcome No significant difference in PPD or MBL, neither in the crude nor in the adjusted analysis, between both groups was found over 12 months’ time, see Table 3. Between both groups, a significant difference was found for the secondary clinical parameter SoP ((test 7.1%±15.4 versus control 11.1% ±19.8, β coefficient 0.211(0.017 to 0.406), p = 0.035 ) when taking into account the a priori defined confounders (adjusted analysis) (Table 3). In addition, a significant difference was found for mean levels of Plq ( p = 0.027 ) while controlling for the baseline value and time (crude analysis). However, when all the predefined confounders were applied in the adjusted model the difference disappeared (p = 0.979). Full mouth periodontal plaque scores significantly reduced in the test group between baseline and 12 months follow-up (p = 0.023) (see Table 2). Midbuccal recession assessment showed a mean of 1.24mm and 0.76mm at 3 months and 0.97mm and 0.65mm and 12 months, in the test group and control group, respectively. Buccal keratinized mucosa levels at baseline were 3.37mm (±2.1) and 2.64mm (±2.1), in the group and control group respectively, and 1.96 (±2.0) and 1.88 (±1.6) in the test and control group respectively at 12 months. 4