Table 2.

Range of Motion From 1 Week Through 6 Months Postoperatively ^a

	Time Postoperatively
	1 wk	2 wk	1 mo	2 mo	3 mo	6 mo b
Extension c	5 ± 3	5 ± 3	5 ± 3	5 ± 2	5 ± 3	5 ± 2
Flexion	109 ± 14	121 ± 12	132 ± 11	139 ± 8	144 ± 7	146 ± 7
Difference: extension	0 ± 1	0 ± 1	0 ± 1	0 ± 2	0 ± 1	0 ± 1
Difference: flexion	–31 ± 16	–23 ± 14	–15 ± 11	–8 ± 8	–4 ± 5	–2 ± 5

^a Data are reported as mean ± SD.

^b n = 1503.

^c Positive value represents degree of hyperextension.