Percutaneous Dorsal Instrumentation of Vertebral Burst Fractures: Value of Additional Percutaneous Intravertebral Reposition—Cadaver Study
Table 1
Overview of the results. All values are expressed as percentages of the initial nonfractured vertebral height. The bisegmental Cobb angle was measured between the upper endplate of T12 and the lower endplate of L2 in degrees. Group 1 = posterior instrumentation only (PI); Group 2 = PI + SpineJack + cement (PI + SJ + CE); Group 3: SpineJack + cement (SJ + CE); Group 4: SI + SpineJack (PI + SJ). Statistical significant differences (Tukey’s Test ) are marked with an asterisk.
Initial unfractured values equal 100%
PI
PI
PI + SJ + CE
PI + SJ + CE
SJ + CE
SJ + CE
PI + SJ
PI + SJ
Mean
STDV
Mean
STDV
Mean
STDV
Mean
STDV
Fractured anterior height (%)
88.1
7.2
87.7
9.9
86.9
9.1
90.2
4.5
Fractured central height (%)
71.7
8.4
72.7
12.4
71.1
13.0
72.9
11.8
Fractured posterior height (%)
85.7
5.3
85.2
8.8
87.0
3.3
89.5
6.1
Restored anterior height (%)
94.2
6.3
102.1
7.9
102.8
6.6
100.8
4.1
Restored central height (%)
69.4
13.8
98.4
6.0
99.1
7.7
98.9
12.8
Restored posterior height (%)
85.9
5.8
95.9
4.0
100.4
6.5
94.8
5.1
After cyclic loading anterior height (%)
85.2
7.8
99.7
5.7
101.0
5.9
95.8
4.4
After cyclic loading central height (%)
63.7
12.2
95.7
5.8
96.7
6.6
85.0
9.8
After cyclic loading posterior height (%)
80.9
6.7
96.1
3.2
96.7
5.0
89.4
7.1
Narrowing of the spinal canal (after fracture; %)
16.9
10.0
18.6
11.9
20.5
12.9
21.3
8.4
Narrowing of the spinal canal (after restoration; %)
