Diederik Hentenaar

90 Chapter 4 Table 1. Baseline patient and implant characteristics Test Control Patient characteristics Total number of patients 27 31 Age [years; mean (SD)] 59.6 (13.6) 59.3 (10.0) Gender; F (female) / M (male) 12 / 15 13 / 18 Smoking; n subjects (%) Current 5 (18.5) 8 (25.8) Never 14 (51.9) 20 (64.5) Former 8 (29.6) 3 (9.7) History of periodontitis; n subjects (%) Yes 9 (33.3) 12 (38.7) No 18 (66.7) 19 (61.3) Diabetes; n subjects (%) Yes (but controlled; HbA1c < 7% or < 53 mmol/mol) 1 (3.7) 1 (3.2) No 26 (96.3) 30 (96.8) Dental status, n patients (%) Fully edentulous 7 (25.9) 6 (19.4) Patially edentulous 20 (74.1) 25 (80.6) Implant characteristics Total number of implants 80 83 Total number of implants presenting peri-implantitis (range) 54 (1-6) 40 (1-3) Time in function [years; mean (SD)] 8.9 (5.8) 8.9 (6.1) Implant type; n implants (%) Nobel Biocare 21 17 Straumann 22 14 Biomet 3i 7 0 Astra Tech 0 3 Other (Camlog, MegaGen, Simpler,IMZ, Dentsply Friadent, Smeden-Martina, Trinon Q) 4 6 Implant surface SLA + SLAactive 22 17 TiUnite 21 12 Other(Osseotite, Osseospeed, Xspeed, machined/turned, plasma sprayed HA) 11 11 Type of suprastructure; n implants (%) Single crown 14 (25.9) 28 (70.0) Fixed partial denture (FPD) 18 (33.3) 2 (5.0) Overdenture 22 (40.7) 10 (25.0) Screw- or cement-retained restoration; n implants (%) Screwed 38 (70.4) 28 (70.0) Cemented 16 (29.6) 12 (30.0) Implants placed in maxilla or mandible; n implants (%)