Sacral fixation technique in lumbosacral fusion

Don O. Stovall, J. Allan Goodrich, Douglas Lundy, Shawn C. Standard, Clarence Joe, C. Dean Preston

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Study design. Servohydraulic load displacement testing was used to study the biomechanical properties of sacral fixation in human cadaveric specimens. Objectives. To evaluate a modification of standard sacral fixation that uses the first dorsal sacral foramina as an adjunct location for the placement of a sacral hook in addition to S1 pedicle screws. Background Data. The stiffness or rigidity of an instrumentation construct governs the amount of relative movement allowed between motion segments undergoing fusion. This property provides the greatest influence over the mechanical conditions necessary for fusion to occur. Methods. Sixteen human cadaveric specimens were divided into two groups with similar bone density assessed by quantitative computed tomography scan. All were instrumented with pedicle screws at L4 and S1. One group also had downgoing offset hooks in the first sacral foramina distracted against the S1 pedicle screw. Instron servohydraulic testing was performed in anterior compressive flexion, and load displacement curves were recorded. Results. The bending stiffness of the specimens instrumented with screw and hook was significantly higher than in those instrumented with pedicle screws alone. The ultimate strength and energy absorbed did not differ between the two groups. Conclusions. The addition of sacral foraminal hooks to standard pedicle screw instrumentation constructs across the lumbosacral junction provides more rigid stabilization of the lumbosacral motion segment in this model.

Original languageEnglish (US)
Pages (from-to)32-37
Number of pages6
JournalSpine
Volume22
Issue number1
DOIs
StatePublished - Jan 1 1997

Fingerprint

Bone Density
Tomography
Pedicle Screws

Keywords

  • lumbosacral fusion
  • sacral fixation

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Clinical Neurology

Cite this

Stovall, D. O., Goodrich, J. A., Lundy, D., Standard, S. C., Joe, C., & Preston, C. D. (1997). Sacral fixation technique in lumbosacral fusion. Spine, 22(1), 32-37. https://doi.org/10.1097/00007632-199701010-00006

Sacral fixation technique in lumbosacral fusion. / Stovall, Don O.; Goodrich, J. Allan; Lundy, Douglas; Standard, Shawn C.; Joe, Clarence; Preston, C. Dean.

In: Spine, Vol. 22, No. 1, 01.01.1997, p. 32-37.

Research output: Contribution to journalArticle

Stovall, DO, Goodrich, JA, Lundy, D, Standard, SC, Joe, C & Preston, CD 1997, 'Sacral fixation technique in lumbosacral fusion', Spine, vol. 22, no. 1, pp. 32-37. https://doi.org/10.1097/00007632-199701010-00006
Stovall DO, Goodrich JA, Lundy D, Standard SC, Joe C, Preston CD. Sacral fixation technique in lumbosacral fusion. Spine. 1997 Jan 1;22(1):32-37. https://doi.org/10.1097/00007632-199701010-00006
Stovall, Don O. ; Goodrich, J. Allan ; Lundy, Douglas ; Standard, Shawn C. ; Joe, Clarence ; Preston, C. Dean. / Sacral fixation technique in lumbosacral fusion. In: Spine. 1997 ; Vol. 22, No. 1. pp. 32-37.
@article{4ca527b9e5bd44df838b7444369e0c9a,
title = "Sacral fixation technique in lumbosacral fusion",
abstract = "Study design. Servohydraulic load displacement testing was used to study the biomechanical properties of sacral fixation in human cadaveric specimens. Objectives. To evaluate a modification of standard sacral fixation that uses the first dorsal sacral foramina as an adjunct location for the placement of a sacral hook in addition to S1 pedicle screws. Background Data. The stiffness or rigidity of an instrumentation construct governs the amount of relative movement allowed between motion segments undergoing fusion. This property provides the greatest influence over the mechanical conditions necessary for fusion to occur. Methods. Sixteen human cadaveric specimens were divided into two groups with similar bone density assessed by quantitative computed tomography scan. All were instrumented with pedicle screws at L4 and S1. One group also had downgoing offset hooks in the first sacral foramina distracted against the S1 pedicle screw. Instron servohydraulic testing was performed in anterior compressive flexion, and load displacement curves were recorded. Results. The bending stiffness of the specimens instrumented with screw and hook was significantly higher than in those instrumented with pedicle screws alone. The ultimate strength and energy absorbed did not differ between the two groups. Conclusions. The addition of sacral foraminal hooks to standard pedicle screw instrumentation constructs across the lumbosacral junction provides more rigid stabilization of the lumbosacral motion segment in this model.",
keywords = "lumbosacral fusion, sacral fixation",
author = "Stovall, {Don O.} and Goodrich, {J. Allan} and Douglas Lundy and Standard, {Shawn C.} and Clarence Joe and Preston, {C. Dean}",
year = "1997",
month = "1",
day = "1",
doi = "10.1097/00007632-199701010-00006",
language = "English (US)",
volume = "22",
pages = "32--37",
journal = "Spine",
issn = "0362-2436",
publisher = "Lippincott Williams and Wilkins",
number = "1",

}

TY - JOUR

T1 - Sacral fixation technique in lumbosacral fusion

AU - Stovall, Don O.

AU - Goodrich, J. Allan

AU - Lundy, Douglas

AU - Standard, Shawn C.

AU - Joe, Clarence

AU - Preston, C. Dean

PY - 1997/1/1

Y1 - 1997/1/1

N2 - Study design. Servohydraulic load displacement testing was used to study the biomechanical properties of sacral fixation in human cadaveric specimens. Objectives. To evaluate a modification of standard sacral fixation that uses the first dorsal sacral foramina as an adjunct location for the placement of a sacral hook in addition to S1 pedicle screws. Background Data. The stiffness or rigidity of an instrumentation construct governs the amount of relative movement allowed between motion segments undergoing fusion. This property provides the greatest influence over the mechanical conditions necessary for fusion to occur. Methods. Sixteen human cadaveric specimens were divided into two groups with similar bone density assessed by quantitative computed tomography scan. All were instrumented with pedicle screws at L4 and S1. One group also had downgoing offset hooks in the first sacral foramina distracted against the S1 pedicle screw. Instron servohydraulic testing was performed in anterior compressive flexion, and load displacement curves were recorded. Results. The bending stiffness of the specimens instrumented with screw and hook was significantly higher than in those instrumented with pedicle screws alone. The ultimate strength and energy absorbed did not differ between the two groups. Conclusions. The addition of sacral foraminal hooks to standard pedicle screw instrumentation constructs across the lumbosacral junction provides more rigid stabilization of the lumbosacral motion segment in this model.

AB - Study design. Servohydraulic load displacement testing was used to study the biomechanical properties of sacral fixation in human cadaveric specimens. Objectives. To evaluate a modification of standard sacral fixation that uses the first dorsal sacral foramina as an adjunct location for the placement of a sacral hook in addition to S1 pedicle screws. Background Data. The stiffness or rigidity of an instrumentation construct governs the amount of relative movement allowed between motion segments undergoing fusion. This property provides the greatest influence over the mechanical conditions necessary for fusion to occur. Methods. Sixteen human cadaveric specimens were divided into two groups with similar bone density assessed by quantitative computed tomography scan. All were instrumented with pedicle screws at L4 and S1. One group also had downgoing offset hooks in the first sacral foramina distracted against the S1 pedicle screw. Instron servohydraulic testing was performed in anterior compressive flexion, and load displacement curves were recorded. Results. The bending stiffness of the specimens instrumented with screw and hook was significantly higher than in those instrumented with pedicle screws alone. The ultimate strength and energy absorbed did not differ between the two groups. Conclusions. The addition of sacral foraminal hooks to standard pedicle screw instrumentation constructs across the lumbosacral junction provides more rigid stabilization of the lumbosacral motion segment in this model.

KW - lumbosacral fusion

KW - sacral fixation

UR - http://www.scopus.com/inward/record.url?scp=0343035731&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0343035731&partnerID=8YFLogxK

U2 - 10.1097/00007632-199701010-00006

DO - 10.1097/00007632-199701010-00006

M3 - Article

C2 - 9122779

AN - SCOPUS:0343035731

VL - 22

SP - 32

EP - 37

JO - Spine

JF - Spine

SN - 0362-2436

IS - 1

ER -