Page 46 - Peri-implant health: the effect of implant design and surgical procedure on bone and soft tissue stability

CHAPTER 3
Figure 2: Mean bone loss (mm) per treatment group and estimated proportion of implants with bone loss above 1, 2, and 3 mm (green = retrospective study design; red = prospective study design)
Mean peri‐implant probing depth and bleeding scores
In 25 papers, representing 34 treatment groups, the mean peri‐implant probing depth was reported. The overall mean weighted PD was 3.3 mm; 75% of the treatment groups reported a mean PD between 3.0 and 3.9 mm and only one treatment group reported a mean PD above 4 mm. The majority of papers reported the mean PD. However, four papers gave a detailed frequency distribution as can be seen in Table 4. Twenty‐eight of the 41 included papers (38/56 treatment groups) reported mean bleeding scores around implants using various indices. Twenty‐four papers (34/56 treatment groups) reported mean peri‐implant bleeding on probing with a weighted mean of 52.2%, ranging from 4.7% to 95.0%. The BoP around implants was <25% for 13 treatment groups,
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