Fig. 8

Effects of different treatments on the biomechanical properties of molars including the compression modulus (a), compressive strength (b), compressive yield stress (c) and maximum stress (d). Rats were treated with distilled water, 15% ethanol, farnesol, farnesal, chlorhexidine, blank PMs, Far-PMs and PPi-Far-PMs, respectively. At 5 weeks after administration, the molars were subjected to the mechanical compressive strength testing via a biomechanical testing system. Values are expressed as mean ± SD. The Tamhane’s T2 test test (*P < 0.05, ****P < 0.0001) was used to assess the treatment efficacy. Symbols represented statistical significance of the labeled groups with the group treated with distilled water (^#P < 0.05, ^##P < 0.01, ^###P < 0.001, ^####P < 0.0001)