Chinese Journal of Tissue Engineering Research ›› 2012, Vol. 16 ›› Issue (9): 1581-1586.doi: 10.3969/j.issn.1673-8225.2012.09.015

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Effect of L4, 5 pedicle CT morphological differences on the internal fixation of implant in Han and Uygur young men

Gao Xiao-liang1, 2, Huang Wei-min1, Hu Yong-sheng1, Wang Wu-chang1, Chu Ge3, Yang Yi2, Jin Ge-le2   

  1. 1Second Department of Spine Surgery, the Sixth Affiliated Hospital of Xinjiang Medical University, Urumqi  830002, Xinjiang Uygur Autonomous Region, China; 2Department of Orthopedics Center, the First Affiliated Hospital of Xinjiang Medical University, Urumqi  830000, Xinjiang Uygur Autonomous Region, China; 3First Department of Spine Surgery, the Fourth Affiliated Hospital of Xinjiang Medical University, Urumqi  830054, Xinjiang Uygur Autonomous Region, China
  • Received:2011-12-10 Revised:2012-01-12 Online:2012-02-26 Published:2012-02-26
  • Contact: Jin Ge-le, Department of Orthopedics Center, the First Affiliated Hospital of Xinjiang Medical University, Urumqi 830000, Xinjiang Uygur Autonomous Region, China; Department of Orthopedics Center, the First Affiliated Hospital of Xinjiang Medical University, Urumqi 830000, Xinjiang Uygur Autonomous Region, China
  • About author:Gao Xiao-liang, Attending physician, Second Department of Spine Surgery, the Sixth Affiliated Hospital of Xinjiang Medical University, Urumqi 830002, Xinjiang Uygur Autonomous Region, China; Department of Orthopedics Center, the First Affiliated Hospital of Xinjiang Medical University, Urumqi 830000, Xinjiang Uygur Autonomous Region, China 59848321@qq.com

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Abstract:

BACKGROUND: In China, there are no studies about the inner deflection angle on cross section, head/tail declination on sagittal plane and morphological differences of the lumbar pedicle CT.
OBJECTIVE: To evaluate the CT morphological defferences of L4, 5 pedicle between Han and uygur and whether the differences have an influence on internal fixation of posterior lumbar.
METHODS: Totally 400 cases who treated with L4,5 posterior pedical screw internal fixation due to lumbar disc herniation were seclected. Han and uygur were 200 male cases respectively aged 20 to 30 years old, height 170-175 cm. Pedicle transverse diameter, length of screw path, transverse section angle and sagitalseetion angle were measured by using length and angle measurement tool of patient browser after imags was eshtablished by conventional spiral CT scan+three-dimensional image processing.
RESULTS AND CONCLUSION: Pedicle diameter of L4 vertebral body in Han should be smaller than that in the uygur, otherwise it might increase the risk of pedicle crack. Inner deflection angle of the Han should be larger than that in the uygur, otherwise it might increase the risk of vertebral body piercing the screws. Pedicle diameter of L5 vertebral body and left inner deflection angle in Han should be smaller than those in the uygur, otherwise it might increase the risk of pedicle crack and screw into the spinal canal to damage nerve.

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