Page 190 - Peri-implant health: the effect of implant design and surgical procedure on bone and soft tissue stability

CHAPTER 8
and only one had bone loss above 2.5 mm. One should consider that these bone loss measurements are calculated with the date of placement as the baseline, hence including initial bone remodeling after surgery. The strict follow-up and regular check-ups of the patients may add to good compliance and consequently to the good peri-implant health assessed in the study.
Table 3: Implant distribution of study IV at 5 years according to calculated bone level and probing pocket depth; numbers between brackets show implants with bleeding on probing.
Probing pocket depth (mm)
Bone level (mm)
<0.5
0.5 - 0.99
1.00 - 1.49
1.50 - 1.99
2.00 - 2.49
≥ 2.5
Total
≤1 1 1 1.1 - 2.0 17 (9) 2 (1) 2.1 - 3.0 17 (8) 4 (2) 3.1 - 4.0 1 (1) 0 4.1 - 5.0 0 0 > 5.0 0 0
Total 36 (18) 7 (3)
0 0 3 (1) 0 0 0 0 0 0 0 0 0 3 (1) 0
0 0
0 1 1 (1) 0 0 0 0 0 0 0 1 (1) 1
2 23 (11) 22 (11) 1 (1) 0
0 48 (23)
More recently, new definition for peri-implantitis were given by the 2017 Consensus report of the World Workshop on the classification of Periodontal and Peri-Implant Diseases and Conditions.10 This consensus report was not available yet at the moment of preparation of Study I and II. Using the new internationally accepted criteria with bone levels ≥ 3mm apical of the most coronal portion of the intraosseous part of the implant and/or probing depths ≥ 6 mm, the prevalence of peri-implantitis on implant level in Study III, IV and V is 0%.
In addition, Study I was critically appraised in the 5th EAO Consensus Conference and used for clinical recommendations and research directions.11 The panel of experts highlighted the importance of an internationally accepted case definition for peri-implantitis. Without accepted international definitions, evidence-based knowledge on the prevalence of peri-implantitis is lacking. Moreover, the panel addressed the debate on the diagnostic validity of probing pocket depth and bleeding on probing. These parameters are accepted evidence-based tools to diagnose and define periodontal health and disease. However, these parameters may not have the same diagnostic value for the diagnosis of peri-implantitis. Therefore, the second part of Study I focussed on the correlation between the prevalence of peri-implantitis and the biologic parameters mean bone loss, mean probing pocket depth and mean bleeding on probing. In addition, we
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