Biomechanical comparison of laminotomy versus laminectomy- A cadaveric study

  • Sidharth Madaan Himalayan Institute of Medical Sciences, Swami Rama Himalayan University, Dehradun
  • Vijendra Devisingh Chauhan Swami Rama Himalayan University
  • Aksh Dubey Himalayan Institute of Medical Sciences, Swami Rama Himalayan University, Dehradun
  • Indra Vir Singh Indian Institute of Technology Roorkee, Roorkee

Abstract

Background:


Stability of the lumbar spine is attributable to several structures in the functional spinal unit. The association of lumbar spine instability between laminotomy and laminectomy has been clinically studied, but the corresponding in-vitro biomechanical studies are very limited. Using a cadaveric simulation model we compared lumbar spine stability after unilateral laminotomy, bilateral laminotomy and laminectomy in fresh frozen human cadaver models on mechanical loading.


Materials & Methods:


Ten fresh frozen human cadaver lumbar spine specimens were studied. Each specimen was tested intact (Group I), after unilateral laminotomy (Group II), bilateral laminotomy (Group III) and laminectomy (Group IV). Universal testing machine was used to generate physioloical loading in flexion, extension and lateral bending. Intervertebral displacement was measured by extensometer.


Results:


Under flexion motion, intervertebral displacement of laminectomy (Group IV) specimens at decompression level L3–L4 was statistically greater as compared to intact, unilateral or bilateral laminotomy specimens (p<0.05). No significant difference was found among any of the other movements (p> 0.05).


Conclusions:


Unilateral laminotomy and bilateral laminotomy are more stable surgical procedures. Laminectomy causes spinal segmental instability in flexion. Integrity of posterior osteoligamentous complex helps to provide segmental stability of the decompressive spinal unit.

Published
Mar 31, 2017
How to Cite
MADAAN, Sidharth et al. Biomechanical comparison of laminotomy versus laminectomy- A cadaveric study. SRHU MEDICAL JOURNAL, [S.l.], v. 1, n. 1, p. 16 - 21, mar. 2017. ISSN 2456-7825. Available at: <http://journal.srhu.edu.in/index.php/SRHUMJ/article/view/12>. Date accessed: 21 oct. 2018.
Section
Original Research