Chinese Journal of Tissue Engineering Research

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Three-dimensional measurement of acetabular side before arthroplasty for acetabular dysplasia

Xu Jie, Ma Ruo-fan, Li Deng, Cai Zhi-qing, Li Liang-ping   

  1. Department of Orthopedics, Sun Yat-sen Memoral Hospital, Sun Yat-sen University, Guangzhou  510120, Guangdong Province, China
  • Received:2013-03-18 Revised:2013-05-20 Online:2013-10-22 Published:2013-11-02
  • About author:Xu Jie☆, M.D., Associate professor, Associate chief physician, Department of Orthopedics, Sun Yat-sen Memoral Hospital, Sun Yat-sen University, Guangzhou 510120, Guangdong Province, China lplllpfe@163.com

Abstract:

BACKGROUND: The anatomical strucure of acetabulum is small and shallow in adult acetabular dysplasia patients. The large amount of callus and scar tissues in the acetabulum make it difficult to identify and install the acetabular cup during arthroplasty. The comprehensive understanding of the acetabulum before arthroplasty is the premise for selecting the appropriate acetabular prosthesis and making the acetabular reconstruction program.
OBJECTIVE: To evaluate the application value of three-dimensional reconstruction technique in choosing the size of acetabular cup before total hip arthroplasty for acetabular dysplasia.
METHODS: Spiral CT was carried out in the 11 acetabular dysplasia patients who waiting for total hip arthroplasty. The acetabulum was multi-planar reconstructed, and the size of the acetabular cup was determined through digitized acetabular cup template implantation, and then the mathching degree assessment was performed to compare with the actual size.
RESULTS AND CONCLUSION: Spiral CT could clearly show the acetabular morphology, and the 71.4% of the acetabular size chosen in the three-dimensional preoperative plan was the same as actual one, the intraclass correlation coefficient was 0.888. The agreement was much higher than that of two-dimensional preoperative plan based on X-ray plain film. For the patients with acetabular dysplasia, the acetabulum became samller and shallower, and there were various extents of bone defects in the superior-lateral acetabulum. Three-dimensional multi-planar reconstruction can effectively evaluate the acetabular morphology, and three-dimensional preoperative plan can provide useful information for the choice of implant.

Key words: acetabulum, hip dislocation, hip joint, arthroplasty, replacement, hip

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