Fig. 1

Comparison of calprotectin levels in PICF. PICF samples were collected from peri-implant disease sites (n = 40, diseased) and non-diseased sites (n = 34, healthy). Calprotectin amounts (a) were measured by ELISA, and its concentration (b) was normalized by the volume of PICF. Horizontal bars show the mean values of each group. *P < 0.01