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Morphometric Analysis of Lumbar Pedicles in Degenerative Lumbar Scoliosis with a Cobb Angle ≧30 Degrees Takahiro MAKINO 1 , Takashi KAITO 1 , Hiroyasu FUJIWARA 1 , Kazuo YONENOBU 1 1Department of Orthopaedic Surgery, National Hospital Organization Osaka Minami Medical Center Keyword: 腰椎変性側弯 , degenerative lumbar scoliosis , 椎弓根 , pedicle , 任意断面再構成CT , multiplanar reconstruction computed tomography pp.57-62
Published Date 2012/1/25
DOI https://doi.org/10.11477/mf.1408102225
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 Background:The purpose of our study was to assess the asymmetry of lumbar pedicle morphology in degenerative lumbar scoliosis by analyzing the images obtained by multiplanar reconstruction computed tomography (MPR-CT).

 Methods:Eleven patients (88 pedicles) with a Cobb angle ≧30° who underwent preoperative MPR-CT were the subjects of our study. The morphometric parameters of each pedicle inside the curves were measured.

 Results:Transverse pedicle width and minimum pedicle diameter on the concave side were significantly smaller than on the convex side, and the axial angle on the concave side was significantly larger than on the convex side. These differences were most evident at L4.

 Conclusions:We speculated that these asymmetrical changes in the lumbar pedicles were attributable to the remodeling caused by axial load imbalance and the limited space available for pedicles on the concave side. Surgeons should keep these differences in mind and pay attention to screw size and direction when inserting pedicle screws on the concave side.


Copyright © 2012, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1286 印刷版ISSN 0557-0433 医学書院

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