Three dimensional reconstruction and measurement of the proximal femur in adult developmental dysplasia of the hip

• Published in: Chung-hua wai kʿo tsa chih Vol. 54; no. 4; p. 264
• Main Authors: Liu, Shuanglu, Liu, Lanbo, Zuo, Jianlin, Xiao, Jianlin, Yang, Yuhui, Gao, Zhongli
• Format: Journal Article
• Language: Chinese
• Published: China 01.04.2016
• Subjects: Adult; Analysis of Variance; Case-Control Studies; Femur - abnormalities; Femur - diagnostic imaging; Hip Dislocation, Congenital - classification; Hip Dislocation, Congenital - diagnostic imaging; Hip Joint - diagnostic imaging; Humans; Retrospective Studies; Tomography, X-Ray Computed
• ISSN: 0529-5815
• DOI: 10.3760/cma.j.issn.0529-5815.2016.04.005

To investigate characteristics and the differences of the anatomical parameters of the proximal femur of the developmental dysplasia of the hip (DDH). A total of 38 patients(47 hips) diagnosed as DDH with CT scan data and the pelvis radiograph from January 2012 to December 2014 in China-Japan Union Hospital of Jilin University were retrospectively analyzed. All the hips were divided into 3 groups according to Crowe classification method. Thirty normal hips were selected as controls who admitted at the same time. CT data of the patients were imported into Mimics 17.0. The three-dimensional models of the proximal femur were then reconstructed, and the following parameters were measured: neck-shaft angle, neck length, offset, height of the centre of femoral head, height of the isthmus, height of greater trochanter, the medullary canal diameter of isthmus (Di), the medullary canal diameter 10 mm above the apex of the lesser trochanter (DT+ 10), the medullary canal diameter 20 mm below the apex of the lesser troch