Chinese Journal of Tissue Engineering Research ›› 2012, Vol. 16 ›› Issue (22): 4006-4009.doi: 10.3969/j.issn.1673-8225.2012.22.004

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The thickness distribution characteristics of cortical bone around acetabulum measured by three-dimensional image

Sun Jian-wei1, Yin Wang-ping1, Zhang Chun-cai2, Ren Ke3, Xu Zheng-feng1, Wang Ming-xin1, Zhi Xiao-cheng1   

  1. 1Department of Orthopedics, Affiliated Jinshan Hospital of Fudan University, Shanghai  201508, China; 2Department of Orthopedics, Affiliated Changhai Hospital of Second Military Medical University, Shanghai  200433, China; 3Department of Orthopedics, Nanjing General Hospital of Nanjing Military Command, Nanjing  210002, Jiangsu Province, China
  • Received:2011-11-21 Revised:2012-02-28 Online:2012-05-27 Published:2012-05-27
  • Contact: Yin Wang-ping, Master, Chief physician, Associate professor, Master’s supervisor, Department of Orthopedics, Affiliated Jinshan Hospital of Fudan University, Shanghai 201508, China yinwangping@hotmail.com
  • About author:Sun Jian-wei☆, Doctor, Attending physician, Department of Orthopedics, Affiliated Jinshan Hospital of Fudan University, Shanghai 201508, China galeazisun@126.com
  • Supported by:

    Youth Science and Technology Starting Foundation for Fudan University, No.XQN-200811*

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Abstract:

BACKGROUND: Preliminary studies have established the method to research the spatial distribution of cortical bone thickness through the three-dimensional model based on the CT data of the normal body. 
OBJECTIVE: To make division of the thickness of cortical bone around the acetabulum according to the three-dimensional thickness distribution of the hip cortical bone.
METHODS: The cortical bone was extracted and the geometric model was established through the segmentation of eight healthy volunteers CT image by Mimics. The new algorithm of cortical thickness measurement was determined by Patran Command Language provided by PATRAN platform. After the thickness data were obtained, we made a division of the thickness area by cluster analysis method according to the distribution size of the cortical bone.   
RESULTS AND CONCLUSION: The cortical thickness of acetabulum was between 0.44 mm and 4.00 mm. Cluster analysis showed that it could be divided into 0.44-1.133 mm group, 1.133-1.826 mm group and 1.826-4.00 mm group. According to the thickness of the three groups, the model was rendered, and then we found that the thicker parts of the cortical bone could be divided into three cortical bone beams. The first group was extended from the arcuate line to the pubic symphysis. The second group was extended from the acetabular roof to iliac nodules .The third group was around the ischium notch. There were three thickest positions throughout the thicker parts of the cortical bone around acetabulum. The positions were consistent with the high stress points.
 

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