Page 193 - Peri-implant health: the effect of implant design and surgical procedure on bone and soft tissue stability

interquartile range, and maximum bone loss at the latest follow-up visit are given in figure 1. None of the implants had a bone level over 3 mm and only five implants showed a bone level above 2 mm. In all treatment groups 75% of the implants, represented by the first three quartiles, showed a bone level of less than 1 mm after respectively 36 months for Study III and 60 months for Study IV.
Figure 1: Boxplots representing bone level at the latest follow-up visit of the 3 clinical studies. * Outliers (≥ 3×IQR above third quartile), ° suspected outliers (between 1.5 and 3×IQR above third quartile)
■ PATIENT-RELATEDFACTORS
The meta-analysis of Study II concluded that ‘smoking’ and ‘history of periodontitis’ yielded significantly more crestal bone loss. This is in agreement with the available literature. Besides more crestal bone loss, the above-mentioned patient-related factors also affected implant survival.15-25 Smoking and untreated periodontitis were exclusion criteria for the clinical studies of this thesis, which could explain the low failure rate (table 3).
GENERAL DISCUSSION
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