Table 2 Changes of the interspace angle before and after surgery, and at final follow-up(X ± S)
location | cases | pre-operation | on Bending film | post-operative | follow-up |
|---|---|---|---|---|---|
L2,3 | 3 | 1.7° ± 2.9° | -1.0° ± 3.5° | 5.7° ± 4.0° | 6.3° ± 2.9° |
L3,4 | 21 | 2.8° ± 3.1° | -1.9° ± 6.7° | 2.4° ± 6.1° | 6.7° ± 8.1° |
L4,5 | 6 | 5.5° ± 2.5° | -4.5° ± 4.6° | -2.3° ± 5.8° | -2.2° ± 5.2° |
total | 30 | 3.2° ± 3.1° | -2.3° ± 6.1° | 1.8° ± 6.2° | 4.9° ± 7.9° |