Fig. 6

Quantification of alveolar bone loss. a The area surrounded by the margin of the submaxillary alveolar bone crest and the cement-enamel junction on the lingual side of the first molar was determined using a stereoscopic microscope. The image analysis was carried out in Sham-administered mice (N = 7), P. gingivalis-administered mice (N = 7), and P. gingivalis and propolis-administered mice (N = 8). All data are means ± SD. No significant difference was observed. b Photographs were taken after the removal of soft tissues. The measured area is displayed with a yellow line. Representative results are shown (N = 7 in Sham- and P. gingivalis-administered mice, N = 8 in P. gingivalis and propolis- administered mice)