Formation process of extension knee joint contracture following external immobilization in rats

doi:10.5312/wjo.v14.i9.669

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Sep 18, 2023 (publication date) through Jun 9, 2024

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World Journal of Orthopedics

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2218-5836

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World J Orthop. Sep 18, 2023; 14(9): 669-681
Published online Sep 18, 2023. doi: 10.5312/wjo.v14.i9.669

Table 1 Total, myogenic, and arthrogenic contracture after knee immobilization for various time periods in 60 SD rats (mean ± SD)

Grouping	Quantity	Degree of contracture
Grouping	Quantity	Total contracture	Myogenic contracture	Arthrogenic contracture
Control	6	0.0 ± 0.0	0.0 ± 0.0	0.0 ± 0.0
Immobilization-1 d	6	1.1 ± 0.6	0.6 ± 0.4	0.5 ± 0.3
Immobilization-2 d	6	2.4 ± 0.7	1.5 ± 0.4	0.9 ± 0.2
Immobilization-3 d	6	5.9 ± 1.0	4.0 ± 1.0	1.9 ± 0.5
Immobilization-1 wk	6	23.5 ± 2.0^a^,^b^,^c^,^d	15.9 ± 1.9^a^,^b^,^c^,^d	7.6 ± 0.7^a^,^b^,^c^,^d
Immobilization-2 wk	6	51.8 ± 1.8^a^,^b^,^c^,^d^,^e	32.7 ± 1.1^a^,^b^,^c^,^d^,^e	19.1 ± 1.3^a^,^b^,^c^,^d^,^e
Immobilization-3 wk	6	78.7 ± 2.2^a^,^b^,^c^,^d^,^e^,^f	33.9 ± 2.1^a^,^b^,^c^,^d^,^e	44.5 ± 1.9^a^,^b^,^c^,^d^,^e^,^f
Immobilization-4 wk	6	79.9 ± 2.8^a^,^b^,^c^,^d^,^e^,^f	34.2 ± 2.2^a^,^b^,^c^,^d^,^e	44.9 ± 2.2^a^,^b^,^c^,^d^,^e^,^f
Immobilization-6 wk	6	80.8 ± 3.5^a^,^b^,^c^,^d^,^e^,^f	35.5 ± 2.9^a^,^b^,^c^,^d^,^e	45.3 ± 2.9^a^,^b^,^c^,^d^,^e^,^f
Immobilization-8 wk	6	82.5 ± 3.0^a^,^b^,^c^,^d^,^e^,^f	35.9 ± 2.5^a^,^b^,^c^,^d^,^e	46.6 ± 2.3^a^,^b^,^c^,^d^,^e^,^f

^aP < 0.05 vs control group.

^bP < 0.05 vs immobilization-1 d group.

^cP < 0.05 vs immobilization-2 d group.

^dP < 0.05 vs immobilization-3 d group.

^eP < 0.05 vs immobilization-1 wk group.

^fP < 0.05 vs immobilization-2 wk group.

Citation: Zhou CX, Wang F, Zhou Y, Fang QZ, Zhang QB. Formation process of extension knee joint contracture following external immobilization in rats. World J Orthop 2023; 14(9): 669-681
URL: https://www.wjgnet.com/2218-5836/full/v14/i9/669.htm
DOI: https://dx.doi.org/10.5312/wjo.v14.i9.669