Table 1 The effective cement blocking area, % DHI, and IDD grade after 48 weeks of surgery

1

L2–3

52.9

79.2

3

L1–2

85.7

2

L3–4

57.2

75.3

4

L4–5

92.6

1

2

L2–3

54.7

81.7

3

L1–2

80.2

1

L3–4

62.5

69.0

5

L4–5

88.0

1

3

L2–3

58.4

77.8

4

L1–2

90.5

1

L3–4

59.8

72.7

4

L4–5

82.1

2

4

L2–3

58.5

72.6

3

L1–2

85.3

2

L3–4

69.6

70.7

5

L4–5

93.8

1

5

L2–3

62.5

68.2

4

L1–2

84.7

1

L3–4

67.2

60.5

5

L4–5

85.6

1

6

L2–3

63.9

66.8

4

L1–2

79.4

2

L3–4

49.6

79.2

3

L4–5

82.0

2

7

L2–3

64.7

66.5

4

L1–2

90.5

1

L3–4

63.2

73.8

4

L4–5

86.3

2

8

L2–3

65.7

74.0

5

L1–2

83.2

2

L3–4

61.4

75.4

4

L4–5

93.7

1

Mean

60.7 ± 5.3

72.7 ± 5.6^*

4.0 ± 0.7^*

86.5 ± 4.6^*

1.4 ± 0.5^*