Loading…

Anterior thoracolumbar instrumentation: stiffness and load sharing characteristics of plate and rod systems

An in vitro biomechanical study using a thoracolumbar corpectomy model to compare load sharing capabilities and stiffnesses of six different anterior instrumentation systems (three rod styles and three plate styles) for stabilizing the thoracic and lumbar spine. To evaluate the axial load sharing ca...

Full description

Saved in:
Bibliographic Details
Published in:Spine (Philadelphia, Pa. 1976) Pa. 1976), 2003-08, Vol.28 (16), p.1794-1801
Main Authors: Brodke, Darrel S, Gollogly, Sohrab, Bachus, Kent N, Alexander Mohr, R, Nguyen, Bao-Khang N
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
cited_by cdi_FETCH-LOGICAL-c344t-23599e177ff62623d60f307485589929be36922920ac8b0b7c2a31e16115e4d23
cites cdi_FETCH-LOGICAL-c344t-23599e177ff62623d60f307485589929be36922920ac8b0b7c2a31e16115e4d23
container_end_page 1801
container_issue 16
container_start_page 1794
container_title Spine (Philadelphia, Pa. 1976)
container_volume 28
creator Brodke, Darrel S
Gollogly, Sohrab
Bachus, Kent N
Alexander Mohr, R
Nguyen, Bao-Khang N
description An in vitro biomechanical study using a thoracolumbar corpectomy model to compare load sharing capabilities and stiffnesses of six different anterior instrumentation systems (three rod styles and three plate styles) for stabilizing the thoracic and lumbar spine. To evaluate the axial load sharing capabilities of the instrumentation in a thoracolumbar corpectomy model and to measure the bending stiffness of the anterior instrumentation systems for the axes of flexion-extension, lateral bending, and axial rotation with and without an anterior column graft in place. Prior publications have analyzed biomechanical characteristics of many spinal instrumentation systems. These reports have compared anterior instrumentation systems with posterior instrumentation systems, in situ fusion techniques, intervertebral spacers, structural allograft and instrumentation, and combined anterior and posterior instrumentation. Other reports have published data on the biomechanical characteristics of typical anterior and posterior spinal instrumentation systems. However, there are no published reports that specifically compare the characteristics of anterior plate-style with anterior rod-style systems, or examining load sharing capabilities. Six constructs of each of six instrumentation systems were mounted on simulated vertebral bodies. A custom four-axis spine simulator was used to apply independent flexion-extension, lateral bending, and axial rotation moments as well as axial compressive loads. Axial load sharing was measured through a range of applied axial loads from 50 N to 500 N with rotational moments maintained at 0 Nm. The bending stiffness of each construct was calculated in response to +/-5.0 Nm moments about each axis of rotation with a 50 N compressive axial load with a full-length corpectomy graft in place, simulating reconstruction of the anterior column, and with no graft in place, simulating catastrophic graft failure. Statistical significance was determined using an analysis of variance and Fisher PLSD post hoc test with an alpha
doi_str_mv 10.1097/01.BRS.0000083201.55495.0E
format article
fullrecord <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_73582035</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>73582035</sourcerecordid><originalsourceid>FETCH-LOGICAL-c344t-23599e177ff62623d60f307485589929be36922920ac8b0b7c2a31e16115e4d23</originalsourceid><addsrcrecordid>eNpFkMlOwzAQhi0EoqXwCsjiwC3FS-zEvZWqLFIlJJaz5Tg2DSRxsZ1D3x53kTqX0UjfzOj_ALjDaIqRKB4Qnj6-f0zRrkpK0shYLtgULc_AGDNSZhgzcQ7GiHKSkZzyEbgK4SfhnGJxCUaYCEJzzsbgd95H4xvnYVw7r7Rrh65SHjZ9iH7oTB9VbFw_gyE21vYmBKj6GrZO1TCslW_6b6hTV3p3JkE6QGfhplXR7EnvErgN0XThGlxY1QZzc-wT8PW0_Fy8ZKu359fFfJVpmucxI5QJYXBRWMsJJ7TmyFJU5CVjpRBEVIZyQVICpHRZoarQRFFsME-pTV4TOgH3h7sb7_4GE6LsmqBN26reuCHIgrKSIMoSODuA2rsQvLFy45tO-a3ESO5US4RlUi1PquVetUTLtHx7_DJUnalPq0e39B98sXuc</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>73582035</pqid></control><display><type>article</type><title>Anterior thoracolumbar instrumentation: stiffness and load sharing characteristics of plate and rod systems</title><source>HEAL-Link subscriptions: Lippincott Williams &amp; Wilkins</source><creator>Brodke, Darrel S ; Gollogly, Sohrab ; Bachus, Kent N ; Alexander Mohr, R ; Nguyen, Bao-Khang N</creator><creatorcontrib>Brodke, Darrel S ; Gollogly, Sohrab ; Bachus, Kent N ; Alexander Mohr, R ; Nguyen, Bao-Khang N</creatorcontrib><description>An in vitro biomechanical study using a thoracolumbar corpectomy model to compare load sharing capabilities and stiffnesses of six different anterior instrumentation systems (three rod styles and three plate styles) for stabilizing the thoracic and lumbar spine. To evaluate the axial load sharing capabilities of the instrumentation in a thoracolumbar corpectomy model and to measure the bending stiffness of the anterior instrumentation systems for the axes of flexion-extension, lateral bending, and axial rotation with and without an anterior column graft in place. Prior publications have analyzed biomechanical characteristics of many spinal instrumentation systems. These reports have compared anterior instrumentation systems with posterior instrumentation systems, in situ fusion techniques, intervertebral spacers, structural allograft and instrumentation, and combined anterior and posterior instrumentation. Other reports have published data on the biomechanical characteristics of typical anterior and posterior spinal instrumentation systems. However, there are no published reports that specifically compare the characteristics of anterior plate-style with anterior rod-style systems, or examining load sharing capabilities. Six constructs of each of six instrumentation systems were mounted on simulated vertebral bodies. A custom four-axis spine simulator was used to apply independent flexion-extension, lateral bending, and axial rotation moments as well as axial compressive loads. Axial load sharing was measured through a range of applied axial loads from 50 N to 500 N with rotational moments maintained at 0 Nm. The bending stiffness of each construct was calculated in response to +/-5.0 Nm moments about each axis of rotation with a 50 N compressive axial load with a full-length corpectomy graft in place, simulating reconstruction of the anterior column, and with no graft in place, simulating catastrophic graft failure. Statistical significance was determined using an analysis of variance and Fisher PLSD post hoc test with an alpha &lt;or= 0.05. Load sharing results ranged from 63% to 89%. There was an inverse relationship between load sharing and stiffness. No correlation was found between load sharing and implant style (rod vs. plate). With the graft in place, stiffness result varied by instrumentation system rather than by plate/rod style. Without the graft, the stiffness of the constructs decreased approximately one-third in flexion-extension, two-thirds in lateral bending, and one-fifth in axial rotation, underlying the importance of the graft in overall construct stiffness. For both load sharing and stiffness, there is more influence from the design of the instrumentation system, than whether it is a plate or rod style system. The graft contributed to overall construct stiffness, particularly in lateral bending.</description><identifier>ISSN: 0362-2436</identifier><identifier>EISSN: 1528-1159</identifier><identifier>DOI: 10.1097/01.BRS.0000083201.55495.0E</identifier><identifier>PMID: 12923465</identifier><language>eng</language><publisher>United States</publisher><subject>Animals ; Biomechanical Phenomena ; Bone Plates ; Bone Transplantation ; Humans ; Image Processing, Computer-Assisted ; Orthopedic Fixation Devices ; Rotation ; Spinal Fusion - instrumentation ; Thoracic Vertebrae - physiology ; Thoracic Vertebrae - surgery ; Weight-Bearing</subject><ispartof>Spine (Philadelphia, Pa. 1976), 2003-08, Vol.28 (16), p.1794-1801</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c344t-23599e177ff62623d60f307485589929be36922920ac8b0b7c2a31e16115e4d23</citedby><cites>FETCH-LOGICAL-c344t-23599e177ff62623d60f307485589929be36922920ac8b0b7c2a31e16115e4d23</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/12923465$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Brodke, Darrel S</creatorcontrib><creatorcontrib>Gollogly, Sohrab</creatorcontrib><creatorcontrib>Bachus, Kent N</creatorcontrib><creatorcontrib>Alexander Mohr, R</creatorcontrib><creatorcontrib>Nguyen, Bao-Khang N</creatorcontrib><title>Anterior thoracolumbar instrumentation: stiffness and load sharing characteristics of plate and rod systems</title><title>Spine (Philadelphia, Pa. 1976)</title><addtitle>Spine (Phila Pa 1976)</addtitle><description>An in vitro biomechanical study using a thoracolumbar corpectomy model to compare load sharing capabilities and stiffnesses of six different anterior instrumentation systems (three rod styles and three plate styles) for stabilizing the thoracic and lumbar spine. To evaluate the axial load sharing capabilities of the instrumentation in a thoracolumbar corpectomy model and to measure the bending stiffness of the anterior instrumentation systems for the axes of flexion-extension, lateral bending, and axial rotation with and without an anterior column graft in place. Prior publications have analyzed biomechanical characteristics of many spinal instrumentation systems. These reports have compared anterior instrumentation systems with posterior instrumentation systems, in situ fusion techniques, intervertebral spacers, structural allograft and instrumentation, and combined anterior and posterior instrumentation. Other reports have published data on the biomechanical characteristics of typical anterior and posterior spinal instrumentation systems. However, there are no published reports that specifically compare the characteristics of anterior plate-style with anterior rod-style systems, or examining load sharing capabilities. Six constructs of each of six instrumentation systems were mounted on simulated vertebral bodies. A custom four-axis spine simulator was used to apply independent flexion-extension, lateral bending, and axial rotation moments as well as axial compressive loads. Axial load sharing was measured through a range of applied axial loads from 50 N to 500 N with rotational moments maintained at 0 Nm. The bending stiffness of each construct was calculated in response to +/-5.0 Nm moments about each axis of rotation with a 50 N compressive axial load with a full-length corpectomy graft in place, simulating reconstruction of the anterior column, and with no graft in place, simulating catastrophic graft failure. Statistical significance was determined using an analysis of variance and Fisher PLSD post hoc test with an alpha &lt;or= 0.05. Load sharing results ranged from 63% to 89%. There was an inverse relationship between load sharing and stiffness. No correlation was found between load sharing and implant style (rod vs. plate). With the graft in place, stiffness result varied by instrumentation system rather than by plate/rod style. Without the graft, the stiffness of the constructs decreased approximately one-third in flexion-extension, two-thirds in lateral bending, and one-fifth in axial rotation, underlying the importance of the graft in overall construct stiffness. For both load sharing and stiffness, there is more influence from the design of the instrumentation system, than whether it is a plate or rod style system. The graft contributed to overall construct stiffness, particularly in lateral bending.</description><subject>Animals</subject><subject>Biomechanical Phenomena</subject><subject>Bone Plates</subject><subject>Bone Transplantation</subject><subject>Humans</subject><subject>Image Processing, Computer-Assisted</subject><subject>Orthopedic Fixation Devices</subject><subject>Rotation</subject><subject>Spinal Fusion - instrumentation</subject><subject>Thoracic Vertebrae - physiology</subject><subject>Thoracic Vertebrae - surgery</subject><subject>Weight-Bearing</subject><issn>0362-2436</issn><issn>1528-1159</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2003</creationdate><recordtype>article</recordtype><recordid>eNpFkMlOwzAQhi0EoqXwCsjiwC3FS-zEvZWqLFIlJJaz5Tg2DSRxsZ1D3x53kTqX0UjfzOj_ALjDaIqRKB4Qnj6-f0zRrkpK0shYLtgULc_AGDNSZhgzcQ7GiHKSkZzyEbgK4SfhnGJxCUaYCEJzzsbgd95H4xvnYVw7r7Rrh65SHjZ9iH7oTB9VbFw_gyE21vYmBKj6GrZO1TCslW_6b6hTV3p3JkE6QGfhplXR7EnvErgN0XThGlxY1QZzc-wT8PW0_Fy8ZKu359fFfJVpmucxI5QJYXBRWMsJJ7TmyFJU5CVjpRBEVIZyQVICpHRZoarQRFFsME-pTV4TOgH3h7sb7_4GE6LsmqBN26reuCHIgrKSIMoSODuA2rsQvLFy45tO-a3ESO5US4RlUi1PquVetUTLtHx7_DJUnalPq0e39B98sXuc</recordid><startdate>20030815</startdate><enddate>20030815</enddate><creator>Brodke, Darrel S</creator><creator>Gollogly, Sohrab</creator><creator>Bachus, Kent N</creator><creator>Alexander Mohr, R</creator><creator>Nguyen, Bao-Khang N</creator><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20030815</creationdate><title>Anterior thoracolumbar instrumentation: stiffness and load sharing characteristics of plate and rod systems</title><author>Brodke, Darrel S ; Gollogly, Sohrab ; Bachus, Kent N ; Alexander Mohr, R ; Nguyen, Bao-Khang N</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c344t-23599e177ff62623d60f307485589929be36922920ac8b0b7c2a31e16115e4d23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2003</creationdate><topic>Animals</topic><topic>Biomechanical Phenomena</topic><topic>Bone Plates</topic><topic>Bone Transplantation</topic><topic>Humans</topic><topic>Image Processing, Computer-Assisted</topic><topic>Orthopedic Fixation Devices</topic><topic>Rotation</topic><topic>Spinal Fusion - instrumentation</topic><topic>Thoracic Vertebrae - physiology</topic><topic>Thoracic Vertebrae - surgery</topic><topic>Weight-Bearing</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Brodke, Darrel S</creatorcontrib><creatorcontrib>Gollogly, Sohrab</creatorcontrib><creatorcontrib>Bachus, Kent N</creatorcontrib><creatorcontrib>Alexander Mohr, R</creatorcontrib><creatorcontrib>Nguyen, Bao-Khang N</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Spine (Philadelphia, Pa. 1976)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Brodke, Darrel S</au><au>Gollogly, Sohrab</au><au>Bachus, Kent N</au><au>Alexander Mohr, R</au><au>Nguyen, Bao-Khang N</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Anterior thoracolumbar instrumentation: stiffness and load sharing characteristics of plate and rod systems</atitle><jtitle>Spine (Philadelphia, Pa. 1976)</jtitle><addtitle>Spine (Phila Pa 1976)</addtitle><date>2003-08-15</date><risdate>2003</risdate><volume>28</volume><issue>16</issue><spage>1794</spage><epage>1801</epage><pages>1794-1801</pages><issn>0362-2436</issn><eissn>1528-1159</eissn><abstract>An in vitro biomechanical study using a thoracolumbar corpectomy model to compare load sharing capabilities and stiffnesses of six different anterior instrumentation systems (three rod styles and three plate styles) for stabilizing the thoracic and lumbar spine. To evaluate the axial load sharing capabilities of the instrumentation in a thoracolumbar corpectomy model and to measure the bending stiffness of the anterior instrumentation systems for the axes of flexion-extension, lateral bending, and axial rotation with and without an anterior column graft in place. Prior publications have analyzed biomechanical characteristics of many spinal instrumentation systems. These reports have compared anterior instrumentation systems with posterior instrumentation systems, in situ fusion techniques, intervertebral spacers, structural allograft and instrumentation, and combined anterior and posterior instrumentation. Other reports have published data on the biomechanical characteristics of typical anterior and posterior spinal instrumentation systems. However, there are no published reports that specifically compare the characteristics of anterior plate-style with anterior rod-style systems, or examining load sharing capabilities. Six constructs of each of six instrumentation systems were mounted on simulated vertebral bodies. A custom four-axis spine simulator was used to apply independent flexion-extension, lateral bending, and axial rotation moments as well as axial compressive loads. Axial load sharing was measured through a range of applied axial loads from 50 N to 500 N with rotational moments maintained at 0 Nm. The bending stiffness of each construct was calculated in response to +/-5.0 Nm moments about each axis of rotation with a 50 N compressive axial load with a full-length corpectomy graft in place, simulating reconstruction of the anterior column, and with no graft in place, simulating catastrophic graft failure. Statistical significance was determined using an analysis of variance and Fisher PLSD post hoc test with an alpha &lt;or= 0.05. Load sharing results ranged from 63% to 89%. There was an inverse relationship between load sharing and stiffness. No correlation was found between load sharing and implant style (rod vs. plate). With the graft in place, stiffness result varied by instrumentation system rather than by plate/rod style. Without the graft, the stiffness of the constructs decreased approximately one-third in flexion-extension, two-thirds in lateral bending, and one-fifth in axial rotation, underlying the importance of the graft in overall construct stiffness. For both load sharing and stiffness, there is more influence from the design of the instrumentation system, than whether it is a plate or rod style system. The graft contributed to overall construct stiffness, particularly in lateral bending.</abstract><cop>United States</cop><pmid>12923465</pmid><doi>10.1097/01.BRS.0000083201.55495.0E</doi><tpages>8</tpages></addata></record>
fulltext fulltext
identifier ISSN: 0362-2436
ispartof Spine (Philadelphia, Pa. 1976), 2003-08, Vol.28 (16), p.1794-1801
issn 0362-2436
1528-1159
language eng
recordid cdi_proquest_miscellaneous_73582035
source HEAL-Link subscriptions: Lippincott Williams & Wilkins
subjects Animals
Biomechanical Phenomena
Bone Plates
Bone Transplantation
Humans
Image Processing, Computer-Assisted
Orthopedic Fixation Devices
Rotation
Spinal Fusion - instrumentation
Thoracic Vertebrae - physiology
Thoracic Vertebrae - surgery
Weight-Bearing
title Anterior thoracolumbar instrumentation: stiffness and load sharing characteristics of plate and rod systems
url http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-25T13%3A46%3A48IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Anterior%20thoracolumbar%20instrumentation:%20stiffness%20and%20load%20sharing%20characteristics%20of%20plate%20and%20rod%20systems&rft.jtitle=Spine%20(Philadelphia,%20Pa.%201976)&rft.au=Brodke,%20Darrel%20S&rft.date=2003-08-15&rft.volume=28&rft.issue=16&rft.spage=1794&rft.epage=1801&rft.pages=1794-1801&rft.issn=0362-2436&rft.eissn=1528-1159&rft_id=info:doi/10.1097/01.BRS.0000083201.55495.0E&rft_dat=%3Cproquest_cross%3E73582035%3C/proquest_cross%3E%3Cgrp_id%3Ecdi_FETCH-LOGICAL-c344t-23599e177ff62623d60f307485589929be36922920ac8b0b7c2a31e16115e4d23%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_pqid=73582035&rft_id=info:pmid/12923465&rfr_iscdi=true