Electron probe microanalysis оf experimentally stimulated osteoarthrosis in dogs

Table 1 Content of chemical elements in canine articular cartilage

Cartilage zones/groups	Superficial zone	Intermediate zone	Deep zone	Zone of calcified cartilage
ωS (mean ± SD, weight%)
IOA in 2 yr	0.18 ± 0.04a	0.23 ± 0.02a	0.28 ± 0.03a	0.13 ± 0.02
Intact
2 yr (control)	0.35 ± 0.01	0.42 ± 0.04	0.52 ± 0.02	0.14 ± 0.02
5 yr	0.20 ± 0.02a	0.28 ± 0.04a	0.34 ± 0.02a	0.28 ± 0.04a
8 yr	0.33 ± 0.03	0.52 ± 0.01a	0.63 ± 0.04a	0.41 ± 0.07a
ωCa (mean ± SD, weight%)
IOA in 2 yr	0.04 ± 0.02	0.08 ± 0.02a	0.15 ± 0.02a	9.72 ± 0.03
Intact
2 yr (control)	< 0.01	0.04 ± 0.01	0.09 ± 0.01	13.93 ± 0.02
5 yr	0.04 ± 0.01	0.05 ± 0.03	0.10 ± 0.02	16.16 ± 1.04a
8 yr	0.03 ± 0.02	0.05 ± 0.03	0.22 ± 0.02a	21.16 ± 3.04a
ωP (mean ± SD, weight%)
IOA in 2 yr	< 0.02	0.03 ± 0.01	0.08 ± 0.01	4.74 ± 0.02a
Intact
2 yr (control)	< 0.01	< 0.01	< 0.01	6.89 ± 0.01
5 yr	< 0.02	0.07 ± 0.01a	0.09 ± 0.02a	7.44 ± 1.47a
8 yr	0.04 ± 0.02a	0.09 ± 0.02a	0.11 ± 0.02a	9.44 ± 1.29a

^aP < 0.05, vs control.