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Table 1 The intervertebral displacements on L4–L5 segment for intact and two different extents of decompressive procedure. (Intact, bilateral laminotomy, and laminectomy). (Unit: mm)

From: Biomechanical comparison of lumbar spine instability between laminectomy and bilateral laminotomy for spinal stenosis syndrome – an experimental study in porcine model

  Intact Bilateral laminotomy Laminectomy
  Flexion Extension Flexion Extension Flexion Extension
Specimen 1 -1.118 0.944 -1.135 1.276 -2.015 1.187
Specimen 2 -1.116 0.992 -1.012 0.951 -1.433 0.860
Specimen 3 -1.123 1.033 -1.279 1.040 -1.338 0.938
Specimen 4 -0.892 0.710 -0.998 0.835 -1.402 0.944
Specimen 5 -1.004 0.829 -1.165 0.911 -1.410 1.155
Specimen 6 -.0832 0.955 -1.196 1.286 -1.675 1.023
Specimen 7 -1.238 0.873 -0.856 1.115 -1.864 0.968
Specimen 8 -0.984 0.892 -1.243 0.969 -1.473 0.815
Ave. -1.038 0.904 -1.111 1.048 -1.576 0.986
S.D. 0.126 0.095 0.134 0.155 0.232 0.122