Effect of morphological changes in proximal femur on prosthesis selection of total hip arthroplasty in patients with ankylosing spondylitis
Yang, P.; Wang, C.; Wang, K.
Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 20(4): 448-450
2006
ISSN/ISBN: 1002-1892 PMID: 16683454 Document Number: 605044
To investigate the effect of the morphological changes in the proximal femur on the prosthesis selection in the total hip arthroplasty in the patients with ankylosing spondylitis. The experimental group was composed of 13 patients (16 hips) with ankylosing spondylitis, which was treated with the total hip arthroplasty, and the control group was composed of 16 patients (19 hips) with non-ankylosing spondylitis, which was also treated with the total hip arthroplasty. In the two groups, the measurements of Singh index, canal flare index, morphological index of the cortex and cortical index were performed in the two groups. The results of the statistical analysis on Singh index, canal flare index, morphological index of the cortex and cortical index in the experimental group were 3.81 +/- 0.54, 2.63 +/- 0.41, 2.02 +/- 0.38 and 1.69 +/- 0.69, respectively, but 4.63 +/- 0.62, 3.03 +/- 0.27, 2.76 +/- 0.28 and 2.12 +/- 0.24, respectively in the control group. There was a significant difference in Singh index, canal flare index, and morphological index of the cortex between the two groups (P < 0.05), while there was no statistical difference in cortical index between the two groups (P > 0.05). The patients with ankylosing spondylitis had more serious osteoporosis in their proximal femur. Cemented femoral prosthesis should be used in the total hip replacement in patients with ankylosing spondylitis, and the revision total hip arthroplasty should be performed on patients with more serious osteoporosis.