Radiologic assessment of subsidence in stand-alone cervical polyetheretherketone (PEEK) cage

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Abstract

Objective: Aim of study was to find a proper method for assessing subsidence using a radiologie measurement following anterior cervical discectomy and fusion (ACDF) with stand-alone polyetheretherketone (PEEK), Solis™ cage. Methods: Forty-two patients who underwent ACDF with Solis™ cage were selected. With a minimum follow-up of 6 months, the retrospective investigation was conducted for-37 levels in 32 patients. Mean follow-up period was 18.9 months. Total intervertebral height (TIH) of two fused vertebral bodies was measured on digital radiographs with built-in software. Degree of subsidence (ΤIH) was reflected by the difference between the immediate postoperative and follow-up TIH. Change of postoperative disc space height (CT-MR TIH) was reflected by the difference between TIH of the preoperative mid-sagittal 2D CT and that of the preoperative mid-sagittal T1-weighted MRI. Results: Compared to preoperative findings, postoperative disc height was increased in all cases and subsidence was observed only in 3 cases. For comparison of subsidence and non-subsidence group, TIH and CT-MR TIH of each group were analyzed. There was no statistically. significant difference in TIH and CT-MR ΤIH between each group at 4 and 8 weeks; but a difference was observed at the last follow-up TIH (p=0.0497). Conclusion: ACDF with Solis™ cage was associated with relatively good radiologic long-term results. Fusion was achieved in 94.5% and subsidence occurred in 8.1% by the radiologic assessment. Statistical analysis reveals that the subsidence seen later than 8 weeks after surgery and the development of subsidence does not correlate statistically with the change of the postoperative disc space height.

Original languageEnglish
Pages (from-to)370-374
Number of pages5
JournalJournal of Korean Neurosurgical Society
Volume44
Issue number6
DOIs
Publication statusPublished - 2008 Dec 1

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Diskectomy
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polyetheretherketone

Keywords

  • Anterior cervical discectomy and fusion
  • Cervical PEEK cage
  • Fusion rate
  • Radiologic assessment
  • Subsidence

ASJC Scopus subject areas

  • Surgery
  • Neuroscience(all)
  • Clinical Neurology

Cite this

@article{46c3dc7d0c444ff18079f1e428e0bf25,
title = "Radiologic assessment of subsidence in stand-alone cervical polyetheretherketone (PEEK) cage",
abstract = "Objective: Aim of study was to find a proper method for assessing subsidence using a radiologie measurement following anterior cervical discectomy and fusion (ACDF) with stand-alone polyetheretherketone (PEEK), Solis™ cage. Methods: Forty-two patients who underwent ACDF with Solis™ cage were selected. With a minimum follow-up of 6 months, the retrospective investigation was conducted for-37 levels in 32 patients. Mean follow-up period was 18.9 months. Total intervertebral height (TIH) of two fused vertebral bodies was measured on digital radiographs with built-in software. Degree of subsidence (ΤIH) was reflected by the difference between the immediate postoperative and follow-up TIH. Change of postoperative disc space height (CT-MR TIH) was reflected by the difference between TIH of the preoperative mid-sagittal 2D CT and that of the preoperative mid-sagittal T1-weighted MRI. Results: Compared to preoperative findings, postoperative disc height was increased in all cases and subsidence was observed only in 3 cases. For comparison of subsidence and non-subsidence group, TIH and CT-MR TIH of each group were analyzed. There was no statistically. significant difference in TIH and CT-MR ΤIH between each group at 4 and 8 weeks; but a difference was observed at the last follow-up TIH (p=0.0497). Conclusion: ACDF with Solis™ cage was associated with relatively good radiologic long-term results. Fusion was achieved in 94.5{\%} and subsidence occurred in 8.1{\%} by the radiologic assessment. Statistical analysis reveals that the subsidence seen later than 8 weeks after surgery and the development of subsidence does not correlate statistically with the change of the postoperative disc space height.",
keywords = "Anterior cervical discectomy and fusion, Cervical PEEK cage, Fusion rate, Radiologic assessment, Subsidence",
author = "Sung-Kon Ha and Park, {Jung Yul} and Se-Hoon Kim and Lim, {Dong Jun} and Sang-Dae Kim and Lee, {Sang Kook}",
year = "2008",
month = "12",
day = "1",
doi = "10.3340/jkns.2008.44.6.370",
language = "English",
volume = "44",
pages = "370--374",
journal = "Journal of Korean Neurosurgical Society",
issn = "2005-3711",
publisher = "Daehan sin'gyeong oe'gwa haghoe",
number = "6",

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TY - JOUR

T1 - Radiologic assessment of subsidence in stand-alone cervical polyetheretherketone (PEEK) cage

AU - Ha, Sung-Kon

AU - Park, Jung Yul

AU - Kim, Se-Hoon

AU - Lim, Dong Jun

AU - Kim, Sang-Dae

AU - Lee, Sang Kook

PY - 2008/12/1

Y1 - 2008/12/1

N2 - Objective: Aim of study was to find a proper method for assessing subsidence using a radiologie measurement following anterior cervical discectomy and fusion (ACDF) with stand-alone polyetheretherketone (PEEK), Solis™ cage. Methods: Forty-two patients who underwent ACDF with Solis™ cage were selected. With a minimum follow-up of 6 months, the retrospective investigation was conducted for-37 levels in 32 patients. Mean follow-up period was 18.9 months. Total intervertebral height (TIH) of two fused vertebral bodies was measured on digital radiographs with built-in software. Degree of subsidence (ΤIH) was reflected by the difference between the immediate postoperative and follow-up TIH. Change of postoperative disc space height (CT-MR TIH) was reflected by the difference between TIH of the preoperative mid-sagittal 2D CT and that of the preoperative mid-sagittal T1-weighted MRI. Results: Compared to preoperative findings, postoperative disc height was increased in all cases and subsidence was observed only in 3 cases. For comparison of subsidence and non-subsidence group, TIH and CT-MR TIH of each group were analyzed. There was no statistically. significant difference in TIH and CT-MR ΤIH between each group at 4 and 8 weeks; but a difference was observed at the last follow-up TIH (p=0.0497). Conclusion: ACDF with Solis™ cage was associated with relatively good radiologic long-term results. Fusion was achieved in 94.5% and subsidence occurred in 8.1% by the radiologic assessment. Statistical analysis reveals that the subsidence seen later than 8 weeks after surgery and the development of subsidence does not correlate statistically with the change of the postoperative disc space height.

AB - Objective: Aim of study was to find a proper method for assessing subsidence using a radiologie measurement following anterior cervical discectomy and fusion (ACDF) with stand-alone polyetheretherketone (PEEK), Solis™ cage. Methods: Forty-two patients who underwent ACDF with Solis™ cage were selected. With a minimum follow-up of 6 months, the retrospective investigation was conducted for-37 levels in 32 patients. Mean follow-up period was 18.9 months. Total intervertebral height (TIH) of two fused vertebral bodies was measured on digital radiographs with built-in software. Degree of subsidence (ΤIH) was reflected by the difference between the immediate postoperative and follow-up TIH. Change of postoperative disc space height (CT-MR TIH) was reflected by the difference between TIH of the preoperative mid-sagittal 2D CT and that of the preoperative mid-sagittal T1-weighted MRI. Results: Compared to preoperative findings, postoperative disc height was increased in all cases and subsidence was observed only in 3 cases. For comparison of subsidence and non-subsidence group, TIH and CT-MR TIH of each group were analyzed. There was no statistically. significant difference in TIH and CT-MR ΤIH between each group at 4 and 8 weeks; but a difference was observed at the last follow-up TIH (p=0.0497). Conclusion: ACDF with Solis™ cage was associated with relatively good radiologic long-term results. Fusion was achieved in 94.5% and subsidence occurred in 8.1% by the radiologic assessment. Statistical analysis reveals that the subsidence seen later than 8 weeks after surgery and the development of subsidence does not correlate statistically with the change of the postoperative disc space height.

KW - Anterior cervical discectomy and fusion

KW - Cervical PEEK cage

KW - Fusion rate

KW - Radiologic assessment

KW - Subsidence

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U2 - 10.3340/jkns.2008.44.6.370

DO - 10.3340/jkns.2008.44.6.370

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EP - 374

JO - Journal of Korean Neurosurgical Society

JF - Journal of Korean Neurosurgical Society

SN - 2005-3711

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