A histomorphometric analysis was performed in the mandibles of male rats treated with vehicle, ALN, or a low dose (LD) (8 μg/kg) or high dose (HD) of ZOL (80 μg/kg) for 6, 12 and 18 wks. Mineralizing surface (A), mineral apposition rate (B), bone formation rate (C), osteoclast number (D) and blood vessel number (E). All measurements were performed within the ROI described in supplemental Figure 1. An asterisk denotes a significant difference from its respective time-matched vehicle-treated group. (P < 0.05).