Enhanced spino-pelvic fixation for segmental spinal instrumentation : a preliminary biomechanical evaluation

A new method for spino-pelvic fixation of Luque rods was developed and biomechanically evaluated on cadaveric specimens. The technique is surgically simpler and faster than the Galveston technique because it does not require the complex three-dimensional bending of rods to conform to the medullary c...

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Published inOrthopedics (Thorofare, N.J.) Vol. 17; no. 6; pp. 527 - 537
Main Authors THOMAS, K. A, KING, A. G. S, ZEMBO, M. M, SOLOMONOW, M, SUMMERSGILL, L. E, DABEZIES, E. J
Format Journal Article
LanguageEnglish
Published Thorofare, NJ Slack 01.06.1994
SLACK INCORPORATED
Subjects
Aged
Biological and medical sciences
Biomechanical Phenomena
Energy Metabolism
Female
Humans
Male
Materials Testing
Medical sciences
Orthopedic surgery
Prosthesis Failure
Range of Motion, Articular
Spinal Fusion - instrumentation
Spinal Fusion - methods
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
Time Factors
Weight-Bearing
Human
Disease of the spine
Deformation
Spine
Diseases of the osteoarticular system
Internal
Normal
Pelvis bone
Biomechanics
Orthopedic surgery
Fixation
Treatment
Pin
Scoliosis
Surgery
Technique
Experimental surgery
Cadaver
Comparative study
Technical equipment
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Summary:A new method for spino-pelvic fixation of Luque rods was developed and biomechanically evaluated on cadaveric specimens. The technique is surgically simpler and faster than the Galveston technique because it does not require the complex three-dimensional bending of rods to conform to the medullary cavity of the iliac wings. Spines were tested in axial compression in both bilateral and unilateral ischial weight bearing in the intact condition, instrumented with the new technique, and instrumented with the Galveston technique. Compared to the intact spine, the technique increased bilateral average stiffness by 131% and unilateral average stiffness by 192%. Compared directly to the Galveston technique, the new method exhibited increased average stiffness of 15% in bilateral and 11% in unilateral ischial weight bearing. The new method combines the advantages of a simpler and faster surgical procedure than the Galveston technique with enhanced spino-pelvic fixation with the potential to decrease migration of rods relative to each other and the pelvis.
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ISSN:0147-7447
1938-2367
DOI:10.3928/0147-7447-19940601-08