Page 52 - Peri-implant health: the effect of implant design and surgical procedure on bone and soft tissue stability

CHAPTER 3
correlation with the mean function time (Pearson r = −0.49). The correlation between mean PD and mean function time is weak (Pearson r = −0.27). There is no indication of correlation between the mean function time and mean BoP (Pearson r = −0.06).
■ DISCUSSION
This review focused on reported peri‐implantitis prevalence and diagnostic parameters considered important for long‐term outcome. Biologic complications often coined as peri‐implantitis may cause patient discomfort and may result in implant failure. For the current critical review, the search was limited from 2011 to September 2017, which coincides with the scientific debate on peri‐implantitis. It was decided to include all types of studies to be as inclusive as possible. This may better reflect daily clinical practice when compared to well‐controlled academic studies. Because peri‐implantitis occurs commonly after longer function time, studies were included when at least 5 years of mean follow‐up was reported. Over the last decade, there has been a tremendous increase in the use of dental implants in daily clinical practice and consequently also scientific interest has increased. In 2011, twice as many papers appeared compared to 2006 and from 2011 until 2017 as many papers appeared than in the previous 35 years as visualized in Figure 6. Despite 4,173 initially selected papers, only 255
Figure 6: Number of publications per year from the search string applied in this systematic review
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