Relative cell numbers in the metaphysis of the proximal tibia.

<p>Indices of osteoblast (Ob.S/BS) and osteoclast (Oc.S/BS) number of (<b>A,B</b>) age-matched controls (AC), hindlimb unloaded (HU), sham loaded (HU+SHAM), and vibrated mice (HU+VIB) after the initial 3 w phase and of (<b>C,D</b>) age-matched controls (AC), reambulation (RA), sham loaded (RA+SHAM), and vibrated mice (RA+VIB) at the end of the 6 w experimental phase. Data are mean ± SD. Groups were compared by ANOVA followed by SNK. Letters denominate significant (p<0.05) differences between groups: <b>+</b> any group different from AC; § HU+SHAM (RA+SHAM) or HU+VIB (RA+VIB) different from HU (RA); # HU+VIB (RA+VIB) different from HU+SHAM (RA+SHAM).