Skip to main content

Table 3 Biomechanical values (median, (Q1, Q3)) for lateral bending and axial rotation in all groups

From: Biomechanical evaluation of combined short segment fixation and augmentation of incomplete osteoporotic burst fractures

Axial rotation NZ   EZ   sNZ   sEZ  
  [°]   [°]   [°]   [°]  
1) Intact specimen 4.2 (2.2, 5.9) 100% 13.0 (5.8, 15.8) 100% 0.24 (0.18, 0.64) 100% 1.10 (1.06, 2.52) 100%
2) Fractured 6.8 (6.4, 8.0) 161% 16.7 (15.3, 18.4) 129% 0.15 (0.10, 0.23) 71% 0.93 (0.83, 1.12) 85%
3) Biseg. instrument. 4.1 (3.2, 5.2) 97% 13.2 (12.1, 14.3) 102% 0.51 (0.24, 0.61) 214% 0.99 (0.87, 1.13) 90%
4) HA 3.4 (3.0, 4.9) 81% 12.5 (8.9, 14.6) 96% 0.50 (0.26, 0.64) 209% 1.10 (0.94, 1.26) 101%
5) VP 6.6 (5.5, 7.5) 156% 16.6 (15.0, 19.7) 128% 0.16 (0.11, 0.22) 67% 0.95 (0.84, 1.08) 87%
Lateral bending NZ   EZ   sNZ   sEZ  
  [°]   [°]   [°]   [°]  
1) Intact specimen 9.3 (3.9, 14.6) 100% 12.8 (3.8, 17.0) 100% 0.28 (0.23, 1.11) 100% 0.73 (0.62, 1.40) 100%
2) Fractured 19.8 (13.1, 20.5) 213% 16.4 (12.0, 19.2) 128% 0.12 (0.09, 0.16) 42% 0.62 (0.51, 0.74) 85%
3) Biseg. instrument. 8.2 (6.4, 12.7) 88% 12.1 (8.5, 14.4) 94% 0.41 (0.39, 0.62) 147% 0.75 (0.63, 0.90) 103%
4) HA 8.0 (6.2, 13.1) 86% 11.9 (8.0, 14.1) 93% 0.38 (0.34, 0.55) 136% 0.73 (0.65, 0.90) 99%
5) VP 16.6 (13.5, 20.6) 179% 17.1 (13.7, 21.0) 134% 0.14 (0.10, 0.15) 50% 0.63 (0.57, 0.81) 86%
  1. In addition, all data are also presented normalized by the intact performance (as a percentage of prefractured values).