Biomechanical Stability of Dental Implants in Augmented Maxillary Sites: Results of a Randomized Clinical Study with Four Different Biomaterials and PRF and a Biological View on Guided Bone Regeneration

Figure 16

Insertion-torque-value (ITV) comparison notched box plot for the subperiosteal tunnel procedure in the anterior maxilla depicts the interquartile range (IQR) between the 25th and 75th percentile of the specific biomaterial tested where 50% of the data points were located. Additionally, the upper whiskers represent data within the 75th percentile +1.5 times the IQR. The lower whisker delimits data of the 25th percentile −1.5 times the IQR. Within the boxes the notches mark the confidence interval based on the median ± 1.58 (IQR/sqrt of ) ( = number of measurements). Additionally, the mean value is indicated by a black square and the cross symbol (+) displays the standard deviation. Easy-graft CRYSTAL (), easy-graft CLASSIC (), easy-graft CLASSIC + Platelet Rich Fibrin (), and control group native anterior maxillary bone ().