Internal architecture of the thoracic pedicle - An anatomic study
Internal architecture of the thoracic pedicle - An anatomic study
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DOI：
10.1097/00007632-199602010-00002
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发表时间：
1996-02-01
期刊：
影响因子：
3
通讯作者：
Panjabi, MM
中科院分区：
文献类型：
--
作者：
Kothe, R;OHolleran, JD;Panjabi, MM
研究设计。在这项研究中，提供的数据为外科医生提供了有关胸椎椎弓根内部结构的额外信息，这对于胸椎椎弓根螺钉固定特别有用。 目的。量化胸椎椎弓根的内部结构。背景数据摘要。有许多研究描述了胸椎椎弓根的外部尺寸（即椎弓根高度、椎弓根宽度以及横向和矢状平面中的椎弓根轴）。然而，关于椎弓根内部结构的可靠信息却很少。方法。将 18 块胸椎连接到薄切片机上，并将两个椎弓根切成 6 块 1.0 毫米的薄片。将接触式X光片的幻灯片后投影到数字化仪上，并对椎弓根的内部和外部边界进行数字化。使用专用计算机软件，计算两个外部尺寸（即椎弓根高度和椎弓根宽度）和四个内部尺寸（即上壁、下壁、内侧壁和外侧壁的皮质厚度）。结果。松质核是皮质壳的两倍多，其范围为椎弓根高度的65.6%至78.6%，以及椎弓根宽度的61.3%至71.6%。在所有椎弓根切片和胸椎层面，内侧壁比外侧壁厚两到三倍。这些差异非常显着（P
Study Design. In this study, data are presented that provide the surgeon with additional information about the internal structure of the thoracic pedicle, which is especially useful for pedicle screw fixation in the thoracic spine.Objectives. To quantify the internal structure of the pedicle in the thoracic spine.Summary of Background Data. There are many studies describing the external dimensions of the thoracic pedicle (i.e., pedicle height, pedicle width, and pedicle axis in the transverse and sagittal planes). However, there is little reliable information concerning the internal structure of the pedicle.Methods. Eighteen thoracic vertebrae were attached to a thin-sectioning machine and both pedicles were cut in six 1.0-mm thin slices. Slides of contact radiographs were rear-projected to a digitizer and the internal and external borders of the pedicle were digitized. Using special computer software, two external dimensions (i.e., pedicle height and pedicle width) and four internal dimensions (i.e., cortical thicknesses of the superior, inferior, medial, and lateral walls) were calculated.Results. The cancellous core was more than twice as large as the cortical shell, with a range from 65.6% to 78.6% with respect to the pedicle height, and 61.3% to 71.6% with respect to the pedicle width. The medial wall was between two and three times thicker than the lateral wall throughout all the pedicle slices and thoracic levels. These differences were highly significant (P