Increased Pelvic Incidence is Associated With a More Coronal Facet Orientation in the Lower Lumbar Spine: A Cadaveric Study of 599 Lumbar Spines

STUDY DESIGN.An anatomic study of facet angle orientation and morphology of the lumbar spine was performed. OBJECTIVE.The aim of this study was to determine how age, gender, race, and pelvic incidence (PI) correlate with facet orientation in the lumbar spine. SUMMARY OF BACKGROUND DATA.Lumbar facet...

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Veröffentlicht in:Spine (Philadelphia, Pa. 1976) Pa. 1976), 2016-10, Vol.41 (19), p.E1138-E1145
Hauptverfasser: Weinberg, Douglas S., Xie, Katherine K., Liu, Raymond W., Gebhart, Jeremy J., Gordon, Zachary L.
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container_end_page E1145
container_issue 19
container_start_page E1138
container_title Spine (Philadelphia, Pa. 1976)
container_volume 41
creator Weinberg, Douglas S.
Xie, Katherine K.
Liu, Raymond W.
Gebhart, Jeremy J.
Gordon, Zachary L.
description STUDY DESIGN.An anatomic study of facet angle orientation and morphology of the lumbar spine was performed. OBJECTIVE.The aim of this study was to determine how age, gender, race, and pelvic incidence (PI) correlate with facet orientation in the lumbar spine. SUMMARY OF BACKGROUND DATA.Lumbar facet orientation has important implications in the development of numerous pathologies of the spine, including arthritis, spondylolisthesis, and adult spinal deformity. Preliminary reports have suggested that sagittal balance of the spine may contribute to facet joint orientation. We therefore designed an anatomic study to investigate the relationship between PI and facet orientation, within the context of age, gender, and race. METHODS.Five hundred ninety-nine cadaveric lumbar spines were obtained from the Hamann-Todd osteological collection. It was determined that facet angle was most reliably assessed by measuring the angle between the superior articular facet and the spinous process. Facet angles were measured bilaterally at each level from T12-L1 through L5-S1 in every specimen. Multivariate regression analysis was used to determine independent predictors of facet angle at each level. RESULTS.Facet angle increased rostrally to caudally, from 22.6 ± 8.3° at T12-L1 to 49.1 ± 12.4° at L5-S1. Cadaver age was an independent predictor of a more sagittal facet angle at lower spinal levels. Caucasian race was an independent predictor of increasing facet angle. Increased PI had no effect on facet angle at T12-L1, L1-L2, L2-L3, or L3-L4, although was a significant predictor of more coronally oriented facet joints at L4-L5 (standardized beta 0.096, P = 0.009) and L5-S1 (standardized beta 0.079, P = 0.032). CONCLUSION.The results of this study provide important data regarding differences in facet angle that exists between individuals. Moreover, the results of this study suggest that facet joints do possess the ability to remodel over time, perhaps in response to perturbations of sagittal balance, osteophyte formation, or other yet to be determined factors.Level of EvidenceN/A
doi_str_mv 10.1097/BRS.0000000000001577
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OBJECTIVE.The aim of this study was to determine how age, gender, race, and pelvic incidence (PI) correlate with facet orientation in the lumbar spine. SUMMARY OF BACKGROUND DATA.Lumbar facet orientation has important implications in the development of numerous pathologies of the spine, including arthritis, spondylolisthesis, and adult spinal deformity. Preliminary reports have suggested that sagittal balance of the spine may contribute to facet joint orientation. We therefore designed an anatomic study to investigate the relationship between PI and facet orientation, within the context of age, gender, and race. METHODS.Five hundred ninety-nine cadaveric lumbar spines were obtained from the Hamann-Todd osteological collection. It was determined that facet angle was most reliably assessed by measuring the angle between the superior articular facet and the spinous process. Facet angles were measured bilaterally at each level from T12-L1 through L5-S1 in every specimen. Multivariate regression analysis was used to determine independent predictors of facet angle at each level. RESULTS.Facet angle increased rostrally to caudally, from 22.6 ± 8.3° at T12-L1 to 49.1 ± 12.4° at L5-S1. Cadaver age was an independent predictor of a more sagittal facet angle at lower spinal levels. Caucasian race was an independent predictor of increasing facet angle. Increased PI had no effect on facet angle at T12-L1, L1-L2, L2-L3, or L3-L4, although was a significant predictor of more coronally oriented facet joints at L4-L5 (standardized beta 0.096, P = 0.009) and L5-S1 (standardized beta 0.079, P = 0.032). CONCLUSION.The results of this study provide important data regarding differences in facet angle that exists between individuals. Moreover, the results of this study suggest that facet joints do possess the ability to remodel over time, perhaps in response to perturbations of sagittal balance, osteophyte formation, or other yet to be determined factors.Level of EvidenceN/A</description><identifier>ISSN: 0362-2436</identifier><identifier>EISSN: 1528-1159</identifier><identifier>DOI: 10.1097/BRS.0000000000001577</identifier><identifier>PMID: 27031765</identifier><language>eng</language><publisher>United States: Wolters Kluwer Health, Inc. All rights reserved</publisher><subject>African Continental Ancestry Group ; Age Factors ; Aged ; European Continental Ancestry Group ; Humans ; Lumbar Vertebrae - anatomy &amp; histology ; Middle Aged ; Orientation - physiology ; Pelvis - anatomy &amp; histology ; Sex Factors ; Zygapophyseal Joint - anatomy &amp; histology</subject><ispartof>Spine (Philadelphia, Pa. 1976), 2016-10, Vol.41 (19), p.E1138-E1145</ispartof><rights>Wolters Kluwer Health, Inc. All rights reserved.</rights><rights>Copyright © 2016 Wolters Kluwer Health, Inc. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c3507-c041d45baa85a95ff261e24f347437a5bf1216fe7966317bb8a4d50674cf6d043</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/27031765$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Weinberg, Douglas S.</creatorcontrib><creatorcontrib>Xie, Katherine K.</creatorcontrib><creatorcontrib>Liu, Raymond W.</creatorcontrib><creatorcontrib>Gebhart, Jeremy J.</creatorcontrib><creatorcontrib>Gordon, Zachary L.</creatorcontrib><title>Increased Pelvic Incidence is Associated With a More Coronal Facet Orientation in the Lower Lumbar Spine: A Cadaveric Study of 599 Lumbar Spines</title><title>Spine (Philadelphia, Pa. 1976)</title><addtitle>Spine (Phila Pa 1976)</addtitle><description>STUDY DESIGN.An anatomic study of facet angle orientation and morphology of the lumbar spine was performed. OBJECTIVE.The aim of this study was to determine how age, gender, race, and pelvic incidence (PI) correlate with facet orientation in the lumbar spine. SUMMARY OF BACKGROUND DATA.Lumbar facet orientation has important implications in the development of numerous pathologies of the spine, including arthritis, spondylolisthesis, and adult spinal deformity. Preliminary reports have suggested that sagittal balance of the spine may contribute to facet joint orientation. We therefore designed an anatomic study to investigate the relationship between PI and facet orientation, within the context of age, gender, and race. METHODS.Five hundred ninety-nine cadaveric lumbar spines were obtained from the Hamann-Todd osteological collection. It was determined that facet angle was most reliably assessed by measuring the angle between the superior articular facet and the spinous process. Facet angles were measured bilaterally at each level from T12-L1 through L5-S1 in every specimen. Multivariate regression analysis was used to determine independent predictors of facet angle at each level. RESULTS.Facet angle increased rostrally to caudally, from 22.6 ± 8.3° at T12-L1 to 49.1 ± 12.4° at L5-S1. Cadaver age was an independent predictor of a more sagittal facet angle at lower spinal levels. Caucasian race was an independent predictor of increasing facet angle. Increased PI had no effect on facet angle at T12-L1, L1-L2, L2-L3, or L3-L4, although was a significant predictor of more coronally oriented facet joints at L4-L5 (standardized beta 0.096, P = 0.009) and L5-S1 (standardized beta 0.079, P = 0.032). CONCLUSION.The results of this study provide important data regarding differences in facet angle that exists between individuals. Moreover, the results of this study suggest that facet joints do possess the ability to remodel over time, perhaps in response to perturbations of sagittal balance, osteophyte formation, or other yet to be determined factors.Level of EvidenceN/A</description><subject>African Continental Ancestry Group</subject><subject>Age Factors</subject><subject>Aged</subject><subject>European Continental Ancestry Group</subject><subject>Humans</subject><subject>Lumbar Vertebrae - anatomy &amp; histology</subject><subject>Middle Aged</subject><subject>Orientation - physiology</subject><subject>Pelvis - anatomy &amp; histology</subject><subject>Sex Factors</subject><subject>Zygapophyseal Joint - anatomy &amp; histology</subject><issn>0362-2436</issn><issn>1528-1159</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkc9uFDEMxiMEokvhDRDykcu0-Z8ZbsuK0kqLilgQx1Em49EGZidLkmnVt-CRyWoLAg7giyX799myP0KeM3rGaGPOX3_YnNHfgiljHpAFU7yuGFPNQ7KgQvOKS6FPyJOUvhRIC9Y8JifcUMGMVgvy_WpyEW3CHt7jeOMdlILvcXIIPsEypeC8zaX92ectWHgXIsIqxDDZES6swwzX0eOUbfZhAj9B3iKswy1GWM-7zkbY7P2Er2AJK9vbG4xlySbP_R2EAVTT_IGlp-TRYMeEz-7zKfl08ebj6rJaX7-9Wi3XlROKmspRyXqpOmtrZRs1DFwz5HIQ0khhrOoGxpke0DS63Gy6rrayV1Qb6QbdUylOycvj3H0M32ZMud355HAc7YRhTi2rueJM1kwUVB5RF0NKEYd2H_3OxruW0fbgRVu8aP_2oshe3G-Yux32v0Q_n1-A-gjchjFjTF_HuXyt3aId8_Z_s-U_pAfMaFG8p0yzIqHVocTFDwWQpBc</recordid><startdate>20161001</startdate><enddate>20161001</enddate><creator>Weinberg, Douglas S.</creator><creator>Xie, Katherine K.</creator><creator>Liu, Raymond W.</creator><creator>Gebhart, Jeremy J.</creator><creator>Gordon, Zachary L.</creator><general>Wolters Kluwer Health, Inc. 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All rights reserved</general><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>20161001</creationdate><title>Increased Pelvic Incidence is Associated With a More Coronal Facet Orientation in the Lower Lumbar Spine: A Cadaveric Study of 599 Lumbar Spines</title><author>Weinberg, Douglas S. ; Xie, Katherine K. ; Liu, Raymond W. ; Gebhart, Jeremy J. ; Gordon, Zachary L.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3507-c041d45baa85a95ff261e24f347437a5bf1216fe7966317bb8a4d50674cf6d043</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>African Continental Ancestry Group</topic><topic>Age Factors</topic><topic>Aged</topic><topic>European Continental Ancestry Group</topic><topic>Humans</topic><topic>Lumbar Vertebrae - anatomy &amp; histology</topic><topic>Middle Aged</topic><topic>Orientation - physiology</topic><topic>Pelvis - anatomy &amp; histology</topic><topic>Sex Factors</topic><topic>Zygapophyseal Joint - anatomy &amp; histology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Weinberg, Douglas S.</creatorcontrib><creatorcontrib>Xie, Katherine K.</creatorcontrib><creatorcontrib>Liu, Raymond W.</creatorcontrib><creatorcontrib>Gebhart, Jeremy J.</creatorcontrib><creatorcontrib>Gordon, Zachary L.</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>Weinberg, Douglas S.</au><au>Xie, Katherine K.</au><au>Liu, Raymond W.</au><au>Gebhart, Jeremy J.</au><au>Gordon, Zachary L.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Increased Pelvic Incidence is Associated With a More Coronal Facet Orientation in the Lower Lumbar Spine: A Cadaveric Study of 599 Lumbar Spines</atitle><jtitle>Spine (Philadelphia, Pa. 1976)</jtitle><addtitle>Spine (Phila Pa 1976)</addtitle><date>2016-10-01</date><risdate>2016</risdate><volume>41</volume><issue>19</issue><spage>E1138</spage><epage>E1145</epage><pages>E1138-E1145</pages><issn>0362-2436</issn><eissn>1528-1159</eissn><abstract>STUDY DESIGN.An anatomic study of facet angle orientation and morphology of the lumbar spine was performed. OBJECTIVE.The aim of this study was to determine how age, gender, race, and pelvic incidence (PI) correlate with facet orientation in the lumbar spine. SUMMARY OF BACKGROUND DATA.Lumbar facet orientation has important implications in the development of numerous pathologies of the spine, including arthritis, spondylolisthesis, and adult spinal deformity. Preliminary reports have suggested that sagittal balance of the spine may contribute to facet joint orientation. We therefore designed an anatomic study to investigate the relationship between PI and facet orientation, within the context of age, gender, and race. METHODS.Five hundred ninety-nine cadaveric lumbar spines were obtained from the Hamann-Todd osteological collection. It was determined that facet angle was most reliably assessed by measuring the angle between the superior articular facet and the spinous process. Facet angles were measured bilaterally at each level from T12-L1 through L5-S1 in every specimen. Multivariate regression analysis was used to determine independent predictors of facet angle at each level. RESULTS.Facet angle increased rostrally to caudally, from 22.6 ± 8.3° at T12-L1 to 49.1 ± 12.4° at L5-S1. Cadaver age was an independent predictor of a more sagittal facet angle at lower spinal levels. Caucasian race was an independent predictor of increasing facet angle. Increased PI had no effect on facet angle at T12-L1, L1-L2, L2-L3, or L3-L4, although was a significant predictor of more coronally oriented facet joints at L4-L5 (standardized beta 0.096, P = 0.009) and L5-S1 (standardized beta 0.079, P = 0.032). CONCLUSION.The results of this study provide important data regarding differences in facet angle that exists between individuals. Moreover, the results of this study suggest that facet joints do possess the ability to remodel over time, perhaps in response to perturbations of sagittal balance, osteophyte formation, or other yet to be determined factors.Level of EvidenceN/A</abstract><cop>United States</cop><pub>Wolters Kluwer Health, Inc. All rights reserved</pub><pmid>27031765</pmid><doi>10.1097/BRS.0000000000001577</doi></addata></record>
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subjects African Continental Ancestry Group
Age Factors
Aged
European Continental Ancestry Group
Humans
Lumbar Vertebrae - anatomy & histology
Middle Aged
Orientation - physiology
Pelvis - anatomy & histology
Sex Factors
Zygapophyseal Joint - anatomy & histology
title Increased Pelvic Incidence is Associated With a More Coronal Facet Orientation in the Lower Lumbar Spine: A Cadaveric Study of 599 Lumbar Spines
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