vBMDVolumetric Bone Mineral Density
vBMDVertebral Bone Mineral Density
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In cortical vBMD of tibiae and femora, no difference was found between landing groups and their time-matched control groups.
dynamic histomorphometry and vBMD) were negatively impacted by the free-fall landing protocol.
vBMD 1.173 (.003) 1.178 (.004) 1.200 (.006) (g/[cm.sup.3]) Ct.
In the proximal tibial metaphysis, the trabecular vBMD was 0.147 [+ or -] 0.028 g/[cm.sup.3] in the control group (Figure 3(a)).
In the proximal tibial metaphysis, HT042 resulted in increased trabecular vBMD, BV/TV, and Tb.N and decreased Tb.Sp, Tb.Pf, and SMI values.
The results revealed that, by the fourth postoperative week, the BVF, Tb.V, and Tb.Th of the subchondral trabecular bones in the model group were significantly lower than those in the control group (P <0.01); Tb.Sp was increased, while vBMD was decreased.
It has been suggested that the gymnastics-specific nature of high-impact loading directly to the distal radius promotes gain in vBMD and higher geometric properties in this specific region of the skeleton, which in turn improves fracture resistance in pre-pubertal female AG (Dowthwaite et al., 2011).
Accordingly, results from the pQCT analyses demonstrated that peri-pubertal AG displayed greater bone strength index at the distal (+157.3 %) and proximal (+83.2 %) radius because of greater BMC, larger total bone cross-sectional area, and higher trabecular and cortical vBMD (Maimoun et al., 2011).
The mechanical stimulus for bone adaptation and the vBMD response in the femoral neck and trochanteric and intertrochanteric regions can be calculated using a finite-element model and bone adaptation theory [1, 12, 14] and matched to the measured aBMD for the following: (a) comparing the pattern of the measured and calculated bone response and (b) analysing the distribution of the mechanical stimulus.
The change in volumetric Bone Mineral Density (vBMD) was calculated as
We recognize that the effect sizes for aBMD and vBMD response are small, thus, we used the BTM responses as the primary variables of interest in this study.
We found no significant changes in the tibia pQCT variables (ToD, ToA, CTh, SSI) for total, cortical and trabecular bone, with the exception of cortical vBMD at the tibia 66%, which significantly decreased for both groups after the intervention.