Lateral mass intrapedicular screw fixation: A radiological evaluation of screw pullout strength

Background: Lateral mass intrapedicular screw (LMIS) fixation was introduced in 2021 as a safe and simple alternative method for the fixation of the subaxial cervical spine in the treatment of various cervical spine diseases. The purpose of this study was to evaluate and compare the screw pullout st...

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Main Authors: Kota Kojima, Hiroaki Kanbe, Kenichiro Fukui, Takahiro Endo, Yasuyuki Fukui, Masayuki Ishikawa, Shunji Asamoto
Format: Article
Language:English
Published: Wolters Kluwer Medknow Publications 2024-12-01
Series:Journal of Craniovertebral Junction and Spine
Subjects:
Online Access:https://journals.lww.com/10.4103/jcvjs.jcvjs_160_24
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author Kota Kojima
Hiroaki Kanbe
Kenichiro Fukui
Takahiro Endo
Yasuyuki Fukui
Masayuki Ishikawa
Shunji Asamoto
author_facet Kota Kojima
Hiroaki Kanbe
Kenichiro Fukui
Takahiro Endo
Yasuyuki Fukui
Masayuki Ishikawa
Shunji Asamoto
author_sort Kota Kojima
collection DOAJ
description Background: Lateral mass intrapedicular screw (LMIS) fixation was introduced in 2021 as a safe and simple alternative method for the fixation of the subaxial cervical spine in the treatment of various cervical spine diseases. The purpose of this study was to evaluate and compare the screw pullout strength of this new technique to the trajectories of two other major methods, the transpedicular screw (TPS) and lateral mass screw (LMS) methods. Methods: Two hundred and three patients who underwent a cervical computed tomography (CT) scan at our institution were included in the study. A region of interest for each of the three trajectories was selected using axial slices of the cervical vertebra from C3 through C6, and the CT number (Hounsfield unit) was calculated. Results: A total of 4872 data points were collected. The average age of the patients was 59.5 years. The male-to-female ratio was 135:68. The number of patients over the age of 65 was 93. The average CT numbers were 511.9 for TPS, 473.1 for LMS, and 598.5 for LMIS. There was a significant difference in the CT number among the three trajectories, even when adjusted for sex and age. Conclusion: LMIS is a promising alternative to the common methods used for subaxial cervical spine fixation that has a significant pullout strength. This approach is worth considering in many patients.
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institution Kabale University
issn 0974-8237
0976-9285
language English
publishDate 2024-12-01
publisher Wolters Kluwer Medknow Publications
record_format Article
series Journal of Craniovertebral Junction and Spine
spelling doaj-art-a5730fb7476042ef9ec9a5d81cb1df3b2025-02-06T06:11:06ZengWolters Kluwer Medknow PublicationsJournal of Craniovertebral Junction and Spine0974-82370976-92852024-12-0115439840310.4103/jcvjs.jcvjs_160_24Lateral mass intrapedicular screw fixation: A radiological evaluation of screw pullout strengthKota KojimaHiroaki KanbeKenichiro FukuiTakahiro EndoYasuyuki FukuiMasayuki IshikawaShunji AsamotoBackground: Lateral mass intrapedicular screw (LMIS) fixation was introduced in 2021 as a safe and simple alternative method for the fixation of the subaxial cervical spine in the treatment of various cervical spine diseases. The purpose of this study was to evaluate and compare the screw pullout strength of this new technique to the trajectories of two other major methods, the transpedicular screw (TPS) and lateral mass screw (LMS) methods. Methods: Two hundred and three patients who underwent a cervical computed tomography (CT) scan at our institution were included in the study. A region of interest for each of the three trajectories was selected using axial slices of the cervical vertebra from C3 through C6, and the CT number (Hounsfield unit) was calculated. Results: A total of 4872 data points were collected. The average age of the patients was 59.5 years. The male-to-female ratio was 135:68. The number of patients over the age of 65 was 93. The average CT numbers were 511.9 for TPS, 473.1 for LMS, and 598.5 for LMIS. There was a significant difference in the CT number among the three trajectories, even when adjusted for sex and age. Conclusion: LMIS is a promising alternative to the common methods used for subaxial cervical spine fixation that has a significant pullout strength. This approach is worth considering in many patients.https://journals.lww.com/10.4103/jcvjs.jcvjs_160_24lateral mass intrapedicular screw fixationlateral mass screwlateral mass intrapedicular screwposterior cervical fixationtrans pedicular screw
spellingShingle Kota Kojima
Hiroaki Kanbe
Kenichiro Fukui
Takahiro Endo
Yasuyuki Fukui
Masayuki Ishikawa
Shunji Asamoto
Lateral mass intrapedicular screw fixation: A radiological evaluation of screw pullout strength
Journal of Craniovertebral Junction and Spine
lateral mass intrapedicular screw fixation
lateral mass screw
lateral mass intrapedicular screw
posterior cervical fixation
trans pedicular screw
title Lateral mass intrapedicular screw fixation: A radiological evaluation of screw pullout strength
title_full Lateral mass intrapedicular screw fixation: A radiological evaluation of screw pullout strength
title_fullStr Lateral mass intrapedicular screw fixation: A radiological evaluation of screw pullout strength
title_full_unstemmed Lateral mass intrapedicular screw fixation: A radiological evaluation of screw pullout strength
title_short Lateral mass intrapedicular screw fixation: A radiological evaluation of screw pullout strength
title_sort lateral mass intrapedicular screw fixation a radiological evaluation of screw pullout strength
topic lateral mass intrapedicular screw fixation
lateral mass screw
lateral mass intrapedicular screw
posterior cervical fixation
trans pedicular screw
url https://journals.lww.com/10.4103/jcvjs.jcvjs_160_24
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AT kenichirofukui lateralmassintrapedicularscrewfixationaradiologicalevaluationofscrewpulloutstrength
AT takahiroendo lateralmassintrapedicularscrewfixationaradiologicalevaluationofscrewpulloutstrength
AT yasuyukifukui lateralmassintrapedicularscrewfixationaradiologicalevaluationofscrewpulloutstrength
AT masayukiishikawa lateralmassintrapedicularscrewfixationaradiologicalevaluationofscrewpulloutstrength
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