Trabecular bone separation indicates the average distance between trabecular bone structures, which means that the narrower the gap, the higher the bone density.
The entire volume of interest was automatically separated into cortical and trabecular components, yielding average bone density (D100), trabecular bone density (Dtrab), meta-trabecular bone density (Dmeta), inner-trabecular bone density (Dinn), and cortical bone density (Dcomp) in milligrams HA/cc.
Tb.Sp indicates the average distance between trabecular bones, thus the narrower the gap, the higher the bone density.
As quantified longitudinally by in vivo μCT, unloading led to an average loss of 43% of trabecular bone volume fraction (BV/TV) in the distal femur.
Table 2 shows the mean values of the trabecular bone volume (BV/TV), the trabecular thickness (Tb.Th), the trabecular number (Tb.N), and the trabecular separation (Tb.Sp).
In the upper lumbar region, the trabeculae cranial to a disc on average had 5.3% greater BMD and trabecular bone volume, 3.6% greater trabecular number, 9.7% greater connectivity density, and 3.7% less trabecular separation than the corresponding caudal trabeculae (P < 0.05 for all).
Grupe [1] discriminated between compact and trabecular bone tissues and reported average trace element concentrations of Mg, P, Ca, Zn, Sr and Ba in the two types of tissue.
On average, the peripheral region had 12 15% greater trabecular bone volume fraction and trabecular thickness than the central region (p < 0.01).
With average trabecular dimensions ranging from 50 to 200 µm, depiction and analysis of trabecular bone require high-resolution imaging techniques.
The cortical bone tissue generally exhibits an average turnover rate of ca. 2.5% per year and trabecular bone tissue has a faster turnover rate of ca. 10% per year [44, 48].
