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Table 2 Comparison of rod strain (Mean ± S.D. μE) for all constructs

From: Biomechanical effects of polyaxial pedicle screw fixation on the lumbosacral segments with an anterior interbody cage support

Testing Contour Monoaxial screws Polyaxial screws
Compression 893 ± 123 † 172 ± 33†
  248 ± 23 * 154 ± 20*
  14° 268 ± 52 # 168 ± 25#
  21° 873 ± 170 ‡ 161 ± 23‡
Flexion 595 ± 34 † 256 ± 20†
  22.1 ± 4.8 * 266 ± 12 *
  14° 46.0 ± 4.4 # 203 ± 27#
  21° 633 ± 45 ‡ 162 ± 15 ‡
Lateral Bending 540 ± 33† 404 ± 4†
  258 ± 22* 381 ± 10 *
  14° 273 ± 6 # 430 ± 28 #
  21° 521 ± 16 ‡ 407 ± 6‡
  1. † Significant difference between monoaxial screws group and polyaxial screws group (p < 0.05).
  2. * Significant difference between monoaxial screws group and polyaxial screws group (p < 0.05).
  3. # Significant difference between monoaxial screws group and polyaxial screws group (p < 0.05).
  4. ‡ Significant difference between monoaxial screws group and polyaxial screws group (p < 0.05).