97 Maxillary implant overdentures: peri-implant infections Table 6.2 | Median values and inter-quartile ranges of Modified Bleeding Index (possible score 0-3), means and standard deviations of pocket depth (mm) and peri-implant bone change (mm) at implant level 5 and 10 years (T5 and T10) after maxillary overdenture placement. T5 T10 Anterior Posterior Total Anterior Posterior Total Implants (n) 227 301 528 174 221 395 Median BI [IQR] 0 [0;0] 0 [0;0] 0 [0;0] 0 [0;1] 0 [0;0] 0 [0;0] Mean PD (SD) 3.6 (1.1) 4.3 (1.1) 4.0 (1.2) 4.2 (1.1) 4.5 (1.2) 4.3 (1.2) Mean MBLC (SD) -0.4 (-0.5) -0.5 (-0.7) -0.4 (-0.6) -0.4 (-0.7) -0.5 (-0.9) -0.5 (-0.8) BI: Bleeding index score, IQR: interquartile range, MBLC: marginal bone level change, PD: pocket depth, SD: standard deviation. Peri-implant disease incidence Both groups’ incidences of peri-implant mucositis and peri-implantitis are presented in Table 6.3. At T5, the patient level peri-implant mucositis incidence was 43.5% for the anterior group and 33.3% for the posterior group. At T10, the peri-implant mucositis incidence had increased to 63.9% for the anterior group and 65.2% for the posterior group. Table 6.3 | Implant level and patient level peri-implant mucositis and peri-implantitis incidence and the extent (the number of affected implants related to the total number of implants in each affected subject) of both diseases 5 and 10 years (T5 and T10) after maxillary overdenture placement. T5 T10 Anterior Posterior Total Anterior Posterior Total Implants (n) 227 301 528 177 224 401 Peri-implant mucositis 17.6% 16.6% 17.1% 33.9% 33.5% 35.2% Peri-implantitis 1.8% 4.3% 3.2% 6.2% 10.3% 8.5% Patients (n) 46 60 106 36 46 82 Peri-implant mucositis 43.5% 33.3% 37.7% 63.9% 65.2% 64.6% Peri-implantitis 6.5% 13.3% 10.4% 11.1% 26.1% 19.5% Peri-implant mucositis extent (SD) 43.3 (28.2)% 48.8 (26.1)% 46.0 (27.0)% 53.6 (32.2)% 52.2 (32.4)% 52.8 (32.0)% Peri-implantitis extent (SD) 25.0 (8.3)% 34.4 (13.7)% 31.8 (12.8)% 47.9 (37.5)% 42.4 (29.6)% 43.8 (30.5)% SD: standard deviation. 6
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