Huiwu Li1, Xinhua Qu, You Wang, Kerong Dai, Zhenan Zhu. 1. Department of Orthopaedics, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 639 Zhizaoju Road, Shanghai, 200011, People's Republic of China.
Abstract
PURPOSE: The purpose of this study was to investigate the morphological changes of the knee in patients with untreated developmental dysplasia of the hip. METHODS: Morphological analysis of 150 knee joints in 75 patients with developmental dysplasia of the hip was performed by examining computed tomographic (CT) images. Of these patients, 36 had unilateral developmental dysplasia of the hip and 39 had bilateral developmental dysplasia of the hip. Therefore, 36 hips were normal, and 114 hips were dislocated. CT images ranged from the iliac crest to 2 cm inferior to the tibial tuberosity. RESULTS: Compared with the knees in patients with normal hips, the femoral condyles in patients with dislocated hips were smaller and exhibited greater medial and lateral condylar asymmetry. The anterior femoral condylar angle of the femur was increased, as was the groove angle, while the trochlear groove was shallower in patients with dislocated hips. Furthermore, the lateral patella shift was reduced and the patellar tilt angle was increased in patients with dislocated hips compared with patients with normal hips. The extent of changes in these variables differed with the degree of dislocation. However, the posterior condylar angle of the femur was not affected by the degree of dislocation. CONCLUSION: These findings suggest that developmental dysplasia of the hip is associated with morphological changes in the knee joint. These changes should be considered during hip and knee surgery. LEVEL OF EVIDENCE: Prospective study, level II.
PURPOSE: The purpose of this study was to investigate the morphological changes of the knee in patients with untreated developmental dysplasia of the hip. METHODS: Morphological analysis of 150 knee joints in 75 patients with developmental dysplasia of the hip was performed by examining computed tomographic (CT) images. Of these patients, 36 had unilateral developmental dysplasia of the hip and 39 had bilateral developmental dysplasia of the hip. Therefore, 36 hips were normal, and 114 hips were dislocated. CT images ranged from the iliac crest to 2 cm inferior to the tibial tuberosity. RESULTS: Compared with the knees in patients with normal hips, the femoral condyles in patients with dislocated hips were smaller and exhibited greater medial and lateral condylar asymmetry. The anterior femoral condylar angle of the femur was increased, as was the groove angle, while the trochlear groove was shallower in patients with dislocated hips. Furthermore, the lateral patella shift was reduced and the patellar tilt angle was increased in patients with dislocated hips compared with patients with normal hips. The extent of changes in these variables differed with the degree of dislocation. However, the posterior condylar angle of the femur was not affected by the degree of dislocation. CONCLUSION: These findings suggest that developmental dysplasia of the hip is associated with morphological changes in the knee joint. These changes should be considered during hip and knee surgery. LEVEL OF EVIDENCE: Prospective study, level II.
Authors: D L Janzen; S E Aippersbach; P L Munk; D F Sallomi; D Garbuz; J Werier; C P Duncan Journal: Skeletal Radiol Date: 1998-07 Impact factor: 2.199
Authors: Clarabelle A DeVries; Peter Hahn; James D Bomar; Vidyadhar V Upasani; Andrew T Pennock Journal: J Child Orthop Date: 2021-06-01 Impact factor: 1.548