Posterior element strength six months postinjury in the canine cervical spine

Edward Southern, Richard R. Pelker, Joseph J. Crisco, Manohar M. Panjabi

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In vivo and in vitro biomechanical studies from this research group revealed that acute differences in the range of motion of C4-C5 canine cervical spine injuries decreased over a 24-week healing period to approach control values. It could be inferred that the repair tissue replacing the injured posterior elements functionally returned the spine to normal. This study investigated the biomechanical properties of the healed tissue and the isolated adjacent posterior elements at each intervertebral level of these same specimens. Twenty-two animals underwent one of four procedures at the C4-C5 level: (a) sham procedure, (b) transection of the supra- and interspinous ligament, (c) laminectomy, or (d) laminectomy plus bilateral facetectomy of the inferior articular facets. Twenty animals survived the entire testing protocol. Twenty-four weeks after injury, destructive testing was performed on the isolated posterior elements in tension loading. The maximum load, elongation at maximum load, stiffness, and energy absorbed to the maximum load were measured. The posterior elements injured by all of the procedures behaved similarly across all experimental groups after 24 weeks of healing. A trend for decreased stiffness in the more extensive surgery groups was seen, but no statistically significant differences were found. This paralleled the results of prior in vivo and in vitro range-of-motion testing.

Original languageEnglish (US)
Pages (from-to)155-161
Number of pages7
JournalJournal of Spinal Disorders and Techniques
Volume6
Issue number2
StatePublished - Jan 1 1993
Externally publishedYes

Fingerprint

Canidae
Spine
Laminectomy
Articular Range of Motion
Wounds and Injuries
Ligaments
Joints
Research
In Vitro Techniques

Keywords

  • Biomechanics
  • Canine cervical spinal injuries
  • Cervical spine
  • Healing

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine
  • Clinical Neurology

Cite this

Posterior element strength six months postinjury in the canine cervical spine. / Southern, Edward; Pelker, Richard R.; Crisco, Joseph J.; Panjabi, Manohar M.

In: Journal of Spinal Disorders and Techniques, Vol. 6, No. 2, 01.01.1993, p. 155-161.

Research output: Contribution to journalArticle

Southern, Edward ; Pelker, Richard R. ; Crisco, Joseph J. ; Panjabi, Manohar M. / Posterior element strength six months postinjury in the canine cervical spine. In: Journal of Spinal Disorders and Techniques. 1993 ; Vol. 6, No. 2. pp. 155-161.
@article{fc41178323ca41dfbe0961a4fcc1bd18,
title = "Posterior element strength six months postinjury in the canine cervical spine",
abstract = "In vivo and in vitro biomechanical studies from this research group revealed that acute differences in the range of motion of C4-C5 canine cervical spine injuries decreased over a 24-week healing period to approach control values. It could be inferred that the repair tissue replacing the injured posterior elements functionally returned the spine to normal. This study investigated the biomechanical properties of the healed tissue and the isolated adjacent posterior elements at each intervertebral level of these same specimens. Twenty-two animals underwent one of four procedures at the C4-C5 level: (a) sham procedure, (b) transection of the supra- and interspinous ligament, (c) laminectomy, or (d) laminectomy plus bilateral facetectomy of the inferior articular facets. Twenty animals survived the entire testing protocol. Twenty-four weeks after injury, destructive testing was performed on the isolated posterior elements in tension loading. The maximum load, elongation at maximum load, stiffness, and energy absorbed to the maximum load were measured. The posterior elements injured by all of the procedures behaved similarly across all experimental groups after 24 weeks of healing. A trend for decreased stiffness in the more extensive surgery groups was seen, but no statistically significant differences were found. This paralleled the results of prior in vivo and in vitro range-of-motion testing.",
keywords = "Biomechanics, Canine cervical spinal injuries, Cervical spine, Healing",
author = "Edward Southern and Pelker, {Richard R.} and Crisco, {Joseph J.} and Panjabi, {Manohar M.}",
year = "1993",
month = "1",
day = "1",
language = "English (US)",
volume = "6",
pages = "155--161",
journal = "Journal of Spinal Disorders",
issn = "1536-0652",
publisher = "Lippincott Williams and Wilkins",
number = "2",

}

TY - JOUR

T1 - Posterior element strength six months postinjury in the canine cervical spine

AU - Southern, Edward

AU - Pelker, Richard R.

AU - Crisco, Joseph J.

AU - Panjabi, Manohar M.

PY - 1993/1/1

Y1 - 1993/1/1

N2 - In vivo and in vitro biomechanical studies from this research group revealed that acute differences in the range of motion of C4-C5 canine cervical spine injuries decreased over a 24-week healing period to approach control values. It could be inferred that the repair tissue replacing the injured posterior elements functionally returned the spine to normal. This study investigated the biomechanical properties of the healed tissue and the isolated adjacent posterior elements at each intervertebral level of these same specimens. Twenty-two animals underwent one of four procedures at the C4-C5 level: (a) sham procedure, (b) transection of the supra- and interspinous ligament, (c) laminectomy, or (d) laminectomy plus bilateral facetectomy of the inferior articular facets. Twenty animals survived the entire testing protocol. Twenty-four weeks after injury, destructive testing was performed on the isolated posterior elements in tension loading. The maximum load, elongation at maximum load, stiffness, and energy absorbed to the maximum load were measured. The posterior elements injured by all of the procedures behaved similarly across all experimental groups after 24 weeks of healing. A trend for decreased stiffness in the more extensive surgery groups was seen, but no statistically significant differences were found. This paralleled the results of prior in vivo and in vitro range-of-motion testing.

AB - In vivo and in vitro biomechanical studies from this research group revealed that acute differences in the range of motion of C4-C5 canine cervical spine injuries decreased over a 24-week healing period to approach control values. It could be inferred that the repair tissue replacing the injured posterior elements functionally returned the spine to normal. This study investigated the biomechanical properties of the healed tissue and the isolated adjacent posterior elements at each intervertebral level of these same specimens. Twenty-two animals underwent one of four procedures at the C4-C5 level: (a) sham procedure, (b) transection of the supra- and interspinous ligament, (c) laminectomy, or (d) laminectomy plus bilateral facetectomy of the inferior articular facets. Twenty animals survived the entire testing protocol. Twenty-four weeks after injury, destructive testing was performed on the isolated posterior elements in tension loading. The maximum load, elongation at maximum load, stiffness, and energy absorbed to the maximum load were measured. The posterior elements injured by all of the procedures behaved similarly across all experimental groups after 24 weeks of healing. A trend for decreased stiffness in the more extensive surgery groups was seen, but no statistically significant differences were found. This paralleled the results of prior in vivo and in vitro range-of-motion testing.

KW - Biomechanics

KW - Canine cervical spinal injuries

KW - Cervical spine

KW - Healing

UR - http://www.scopus.com/inward/record.url?scp=0027446961&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027446961&partnerID=8YFLogxK

M3 - Article

C2 - 8504228

AN - SCOPUS:0027446961

VL - 6

SP - 155

EP - 161

JO - Journal of Spinal Disorders

JF - Journal of Spinal Disorders

SN - 1536-0652

IS - 2

ER -