Table 1 Demographic data, cement type, and preoperative Hounsfield unit values of bone penetration area

Age (years)

72.3 ± 6.8

74.1 ± 7.2

0.21

Female, n (%)

14 (70%)

20 (83%)

0.33

Diagnosis

Osteoarthritis

20

23

0.35

Osteonecrosis

0

1

K–L grade 1/2/3/4

0/1/2/17

0/1/7/15

0.26

Pre-FTA (degrees)

183.6 ± 6.2

183.7 ± 7.5

0.95

Cement type (cobalt HV or cobalt G-HV)

17/3

15/9

0.10

Preoperative HU value

Sclerotic side

300 ± 132

307 ± 142

0.89

Nonsclerotic side

80 ± 55

73 ± 49

0.70