Variant 1 (54 knees)

Variant 2 (59 knees)

Number (%)

Average (Range)

Number (%)

Average (Range)

Extension lag after 6 Months

22 (40.7)

38˚ (25˚ - 46˚)

21 (35.6%)

36˚ (27˚ - 41˚)

Extension lag after 1 year

18 (33.3)

28˚ (21˚ - 37˚)

17 (20.8)

26˚ (20˚ - 32˚)

Extension lag after 2 year

14 (25.9)

23˚ (18˚ - 35˚)

6 (10.2)

15˚ (12˚ - 18˚)

Extension lag after 3 year

9 (16.7)

21˚ (14˚ - 35˚)

3 (5.1%)

10˚ (12˚ - 15˚)

Extension lag end fellow-up

4 (7.8)

19˚ (14˚ - 34˚)

2 (3.4)

9˚ (8˚ - 10˚)