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Table 8 Follow-up results of radiological parameters

From: Pretic-I was a safe and effective artificial cervical disc prosthesis--a retrospective and comparative study with 5-year follow-up

Items

Groups

Pre-operative

1 Week

3 Months

12 Months

Final Follow-up

Shell Angle (°)

Discover (n = 32)

(−)

(−)

0.75 ± 3.42

p = 0.0141*

SP = 71.48%

0.91 ± 3.80

p = 0.0811

0.51 ± 4.30

p = 0.0863

0.09 ± 4.44

p = 0.0529

Pretic-I (n = 32)

(−)

3.03 ± 3.68

2.64 ± 3.85

2.35 ± 3.99

2.23 ± 4.10

C2–7 Cobb Angle (°)

Discover (n = 32)

12.05 ± 12.17

p = 0.3223

16.47 ± 9.46

p = 0.5947

17.11 ± 10.26

p = 0.5805

16.39 ± 9.76

p = 0.8763

19.32 ± 9.32

p = 0.6043

Pretic-I (n = 32)

15.08 ± 11.75

17.84 ± 10.62

15.47 ± 12.83

16.82 ± 11.83

18.00 ± 10.61

C2–7 ROM

 Flexion ROM (°)

Discover (n = 32)

32.63 ± 8.86

p = 0.5973

23.44 ± 10.48

p = 0.9865

32.48 ± 8.17

p = 0.2451

32.29 ± 10.74

p = 0.7345

31.49 ± 9.37

p = 0.4245

Pretic-I (n = 32)

34.01 ± 11.42

23.48 ± 10.97

29.41 ± 12.08

33.18 ± 9.71

33.35 ± 8.77

 Extension ROM (°)

Discover (n = 32)

18.94 ± 8.19

p = 0.8321

12.80 ± 7.06

p = 0.4442

17.01 ± 11.08

p = 0.4040

22.49 ± 11.61

p = 0.1712

19.13 ± 10.19

p = 0.7320

Pretic-I (n = 32)

18.47 ± 9.07

11.55 ± 5.66

19.28 ± 10.21

18.47 ± 11.25

19.95 ± 8.60

 Total ROM (°)

Discover (n = 32)

51.57 ± 12.36

p = 0.7892

36.24 ± 12.67

p = 0.6772

49.49 ± 12.65

p = 0.8173

54.78 ± 13.71

p = 0.3593

50.62 ± 10.39

p = 0.3447

Pretic-I (n = 32)

52.48 ± 14.31

35.03 ± 9.84

48.69 ± 14.44

51.64 ± 13.00

53.30 ± 11.71

FSU ROM

 Flexion ROM (°)

Discover (n = 32)

7.04 ± 4.02

p = 0.1964

5.60 ± 3.74

p = 0.8755

6.97 ± 3.52

p = 0.3079

7.11 ± 3.24

p = 0.5085

6.18 ± 3.76

p = 0.6706

Pretic-I (n = 32)

8.35 ± 3.88

5.45 ± 3.61

6.09 ± 3.25

6.55 ± 3.29

6.60 ± 4.14

 Extension ROM (°)

Discover (n = 32)

4.83 ± 3.91

p = 0.2512

4.32 ± 2.90

p = 0.3818

4.51 ± 3.98

p = 0.7049

4.68 ± 4.03

p = 0.7688

4.19 ± 2.84

p = 0.9319

Pretic-I (n = 32)

3.85 ± 2.65

3.70 ± 2.64

4.24 ± 2.84

4.40 ± 3.30

4.12 ± 2.93

 Total ROM (°)

Discover (n = 32)

11.07 ± 5.36

p = 0.3702

9.92 ± 4.62

p = 0.4755

11.48 ± 4.41

p = 0.2711

11.78 ± 5.51

p = 0.5389

10.36 ± 4.79

p = 0.7560

Pretic-I (n = 32)

12.20 ± 4.52

9.15 ± 3.76

10.33 ± 3.70

10.95 ± 5.03

10.73 ± 4.45

  1. ROM Range of motion, FSU Functional segment unit, SP Statistical power, (−) Without valid data
  2. * indicates that the data has a P value less than 0.05
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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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