Table 2.

Structural parameters for each osteon-type group (significant difference *P < 0.01, **P < 0.001)

	Ordinary osteons	Osteon-in-osteons
Osteon parameters
On.Rd	104 ± 22 µm	103 ± 13 µm
HCa.Rd	36 ± 6 µm	22 ± 5 µm **
Evaluated.BV	1.2 × 106 ± 5.6 × 105 µm3	1.3 × 106 ± 3.0 × 105 µm3
LCN parameters
Number density of nodes	0.015 ± 0.002 1/µm3	0.014 ± 0.003 1/µm3
Number density of canaliculi	0.021 ± 0.003 1/µm3	0.019 ± 0.004 1/µm3
Length density of canaliculi	0.081 ± 0.008 µm/µm3	0.072 ± 0.009 µm/µm3
Node degree	3.62 ± 0.08	3.65 ± 0.04
Weighted node degree	11.9 ± 0.76 µm	11.3 ± 0.90 µm
Average shortest path length	50.0 ± 11.5 µm	92.8 ± 32.3 µm *