A biomechanical comparison of three spondylolysis repair techniques in a calf spine model

Rolando Figueroa Roberto, B. Dezfuli, C. Deuel, S. Curtiss, S. Hazelwood

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Summary of background data: Previous work has demonstrated the efficacy of lumbar pedicle screw hook rod (PSHR) techniques and the Buck screw in the stabilization of spondylolysis. The mechanical behavior of lower profile cervical implants used to create PSHR, hybrid cable plate constructs, and titanium miniplating has not previously been described. Methods: Calf lumbar spines (L2-L6) were utilized for testing (n=27) Intervertebral rotation was measured in the intact spines across the L4-5 segment before and after creation of bilateral pars interarticularis defects. Defects were then stabilized with one of three repair techniques, PSHR, miniplate, or cable plate (CP) constructs. (n=9) A 5-Nm load was applied in flexion-extension, lateral bending and axial rotation. Fracture displacement was measured under flexion-extension and lateral bending modes. Results: Osteotomy of the pars interarticularis increased intervertebral rotation from 4.6° to 9.2° (P<.05). The three techniques of repair reduced intervertebral rotation without statistical superiority of one method. In lateral bending the miniplate was most effective in reducing pars defect displacement (0.6mm, P<0.05). Although, the miniplate provided lower defect displacement in flexion-extension and axial rotation, these differences were not statistically significant. Conclusions: Bilateral miniplate fixation demonstrates superiority in restoring stability in lateral bending as compared to pedicle screw hook rod techniques and cable plate constructs. In flexion-extension and axial rotation, it was as effective as a PSHR method. Consideration of anatomic plate designs warrants consideration. Level of evidence: IV.

Original languageEnglish (US)
Pages (from-to)66-71
Number of pages6
JournalOrthopaedics and Traumatology: Surgery and Research
Volume99
Issue number1
DOIs
StatePublished - Feb 2013

Fingerprint

Spondylolysis
Spine
Osteotomy
Titanium
Pedicle Screws

Keywords

  • Biomechanical testing
  • Isthmus repair
  • Pars interarticularis
  • Spinal stability
  • Spondylolysis

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Surgery

Cite this

A biomechanical comparison of three spondylolysis repair techniques in a calf spine model. / Roberto, Rolando Figueroa; Dezfuli, B.; Deuel, C.; Curtiss, S.; Hazelwood, S.

In: Orthopaedics and Traumatology: Surgery and Research, Vol. 99, No. 1, 02.2013, p. 66-71.

Research output: Contribution to journalArticle

@article{4ef795dc22a245638ec4cc74d46300bd,
title = "A biomechanical comparison of three spondylolysis repair techniques in a calf spine model",
abstract = "Summary of background data: Previous work has demonstrated the efficacy of lumbar pedicle screw hook rod (PSHR) techniques and the Buck screw in the stabilization of spondylolysis. The mechanical behavior of lower profile cervical implants used to create PSHR, hybrid cable plate constructs, and titanium miniplating has not previously been described. Methods: Calf lumbar spines (L2-L6) were utilized for testing (n=27) Intervertebral rotation was measured in the intact spines across the L4-5 segment before and after creation of bilateral pars interarticularis defects. Defects were then stabilized with one of three repair techniques, PSHR, miniplate, or cable plate (CP) constructs. (n=9) A 5-Nm load was applied in flexion-extension, lateral bending and axial rotation. Fracture displacement was measured under flexion-extension and lateral bending modes. Results: Osteotomy of the pars interarticularis increased intervertebral rotation from 4.6° to 9.2° (P<.05). The three techniques of repair reduced intervertebral rotation without statistical superiority of one method. In lateral bending the miniplate was most effective in reducing pars defect displacement (0.6mm, P<0.05). Although, the miniplate provided lower defect displacement in flexion-extension and axial rotation, these differences were not statistically significant. Conclusions: Bilateral miniplate fixation demonstrates superiority in restoring stability in lateral bending as compared to pedicle screw hook rod techniques and cable plate constructs. In flexion-extension and axial rotation, it was as effective as a PSHR method. Consideration of anatomic plate designs warrants consideration. Level of evidence: IV.",
keywords = "Biomechanical testing, Isthmus repair, Pars interarticularis, Spinal stability, Spondylolysis",
author = "Roberto, {Rolando Figueroa} and B. Dezfuli and C. Deuel and S. Curtiss and S. Hazelwood",
year = "2013",
month = "2",
doi = "10.1016/j.otsr.2012.10.011",
language = "English (US)",
volume = "99",
pages = "66--71",
journal = "Orthopaedics and Traumatology: Surgery and Research",
issn = "1877-0568",
publisher = "Elsevier Masson",
number = "1",

}

TY - JOUR

T1 - A biomechanical comparison of three spondylolysis repair techniques in a calf spine model

AU - Roberto, Rolando Figueroa

AU - Dezfuli, B.

AU - Deuel, C.

AU - Curtiss, S.

AU - Hazelwood, S.

PY - 2013/2

Y1 - 2013/2

N2 - Summary of background data: Previous work has demonstrated the efficacy of lumbar pedicle screw hook rod (PSHR) techniques and the Buck screw in the stabilization of spondylolysis. The mechanical behavior of lower profile cervical implants used to create PSHR, hybrid cable plate constructs, and titanium miniplating has not previously been described. Methods: Calf lumbar spines (L2-L6) were utilized for testing (n=27) Intervertebral rotation was measured in the intact spines across the L4-5 segment before and after creation of bilateral pars interarticularis defects. Defects were then stabilized with one of three repair techniques, PSHR, miniplate, or cable plate (CP) constructs. (n=9) A 5-Nm load was applied in flexion-extension, lateral bending and axial rotation. Fracture displacement was measured under flexion-extension and lateral bending modes. Results: Osteotomy of the pars interarticularis increased intervertebral rotation from 4.6° to 9.2° (P<.05). The three techniques of repair reduced intervertebral rotation without statistical superiority of one method. In lateral bending the miniplate was most effective in reducing pars defect displacement (0.6mm, P<0.05). Although, the miniplate provided lower defect displacement in flexion-extension and axial rotation, these differences were not statistically significant. Conclusions: Bilateral miniplate fixation demonstrates superiority in restoring stability in lateral bending as compared to pedicle screw hook rod techniques and cable plate constructs. In flexion-extension and axial rotation, it was as effective as a PSHR method. Consideration of anatomic plate designs warrants consideration. Level of evidence: IV.

AB - Summary of background data: Previous work has demonstrated the efficacy of lumbar pedicle screw hook rod (PSHR) techniques and the Buck screw in the stabilization of spondylolysis. The mechanical behavior of lower profile cervical implants used to create PSHR, hybrid cable plate constructs, and titanium miniplating has not previously been described. Methods: Calf lumbar spines (L2-L6) were utilized for testing (n=27) Intervertebral rotation was measured in the intact spines across the L4-5 segment before and after creation of bilateral pars interarticularis defects. Defects were then stabilized with one of three repair techniques, PSHR, miniplate, or cable plate (CP) constructs. (n=9) A 5-Nm load was applied in flexion-extension, lateral bending and axial rotation. Fracture displacement was measured under flexion-extension and lateral bending modes. Results: Osteotomy of the pars interarticularis increased intervertebral rotation from 4.6° to 9.2° (P<.05). The three techniques of repair reduced intervertebral rotation without statistical superiority of one method. In lateral bending the miniplate was most effective in reducing pars defect displacement (0.6mm, P<0.05). Although, the miniplate provided lower defect displacement in flexion-extension and axial rotation, these differences were not statistically significant. Conclusions: Bilateral miniplate fixation demonstrates superiority in restoring stability in lateral bending as compared to pedicle screw hook rod techniques and cable plate constructs. In flexion-extension and axial rotation, it was as effective as a PSHR method. Consideration of anatomic plate designs warrants consideration. Level of evidence: IV.

KW - Biomechanical testing

KW - Isthmus repair

KW - Pars interarticularis

KW - Spinal stability

KW - Spondylolysis

UR - http://www.scopus.com/inward/record.url?scp=84873261443&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84873261443&partnerID=8YFLogxK

U2 - 10.1016/j.otsr.2012.10.011

DO - 10.1016/j.otsr.2012.10.011

M3 - Article

VL - 99

SP - 66

EP - 71

JO - Orthopaedics and Traumatology: Surgery and Research

JF - Orthopaedics and Traumatology: Surgery and Research

SN - 1877-0568

IS - 1

ER -