腰骶移行椎上一节段腰椎的形态学特点及临床意义

Abstract

Abstract:

Objective　To study morphological characteristics of the lumbar segment above the lumbosacral transitional vertebrae, and provide anatomic basis for the clinical treatment in the spondylolisthesis, lumbar disc herniation and pedicle screw fixation.　Methods　59 specimens of dry lumbar segment above the lumbosacral transitional vertebrae were anatomically evaluated. The anteroposterior diameter, the transverse diameter, the thickness and height of the vertebral isthmus, the longitudinal diameter and transverse diameter of the vertebral pedicle, the height and thickness of the vertebral lamina, the spine index, and the degeneration state were measured with the caliper and the protractor in all specimens.　Results　The anteroposterior diameter and transverse diameter of vertebral isthmus were（34.1±2.7）mm and（47.5±4.6）mm respectively. The height of vertebral isthmus was（12.9±1.6）mm, and the thickness (9.0±1.2）mm. The longitudinal and transverse diameters of vertebral pedicle were（10.6±2.4）mm and (14.0±2.4）mm respectively. The height of the lamina was（18.2±2.6）mm, and the thickness （5.7±1.2）mm. The spine index was （1：4.35）. The hyperplasia of upper vertebra appeared in 48 specimens. Spondylolysis was not found in all specimens.　Conclusions　The vertebral body of lumbar segment above the lumbosacral transitional vertebrae and the transverse diameters of the vertebral pedicle are larger than that of the fourth lumbar vertebrae，which is the support for selecting the larger screws for pedicle fixation. The isthmus thickness of lumbar segment above the lumbosacral transitional vertebrae is larger than that of the fourth lumbar vertebrae，however, congenital developmental defects and weak are not found.

Key words: Lumbar vertebrae, Lumbosacral transtional vertebra, Lumbar segment above the lumbosacral transitional vertebrae, Lumbar vertebrae IV

CLC Number:

R323.43，R682.13

YANG Li-Hui, LIU 　Wei, WANG 　Rui, ZHANG Ji-Zong, KONG Xiao-Chuan, AN Li-Kun, DU Xin-Ru. Morphological characteristics of the lumbar segment above the lumbosacral transitional vertebrae and its clinical significance[J]. Chinese Journal Of Clinical Anatomy, 2011, 29(4): 392-395.

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Morphological characteristics of the lumbar segment above the lumbosacral transitional vertebrae and its clinical significance

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