In vivo hip joint contact distribution and bony impingement in normal and dysplastic human hips
In vivo hip joint contact distribution and bony impingement in normal and dysplastic human hips
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DOI：
10.1002/jor.22414
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发表时间：
2013-10-01
影响因子：
2.8
通讯作者：
Sugamoto, Kazuomi
中科院分区：
文献类型：
--
作者：
Akiyama, Keisuke;Sakai, Takashi;Sugamoto, Kazuomi
我们的目标是明确的三维关节接触面积的体内正常髋关节和髋臼发育不良在特定的位置，使用磁共振成像（MRI），基于体素的注册，和邻近映射。检查了42个正常和24个发育不良髋关节。在4个位置进行MRI：中立位、45度屈曲位、15度伸展位和帕特里克位。股骨和骨盆骨模型重建在中立的位置和叠加在每个不同的位置使用基于体素的注册的图像。使用邻近映射研究推断的软骨接触和骨撞击。股骨头分别在前或后下、前上和后下方向从中立位平移至45 °屈曲位、15 °伸展位和帕特里克位。多元回归分析显示年龄、股骨头球形度和髋臼球形度与较高的髋关节不稳定性相关。本技术使用受试者特异性模型，揭示了健康个体和发育异常患者群体中的体内髋关节接触面积，而没有放射性暴露。这些结果可用于分析髋关节发育不良的疾病进展和髋臼唇撕裂的发病机制。(c)2013年由Wiley Periodicals，Inc.出版的骨科研究学会。J Orthop Res 31：1611-1619，2013
Our objectives were to clarify the 3D articular contact areas of the in vivo normal hip joint and acetabular dysplasia during specific positions using magnetic resonance imaging (MRI), voxel-based registration, and proximity mapping. Forty-two normal and 24 dysplastic hips were examined. MRI was performed at four positions: neutral; 45 degrees flexion; 15 degrees extension; and the Patrick position. Femur and pelvis bone models were reconstructed at the neutral position and superimposed over the images of each different position using voxel-based registration. The inferred cartilage contact and bony impingement were investigated using proximity mapping. The femoral head translated in the anterior or posteroinferior, anterosuperior, and posteroinferior direction from neutral to 45 degrees flexion, 15 degrees extension, and the Patrick position, respectively. Multiple regression analyses showed age, femoral head sphericity, and acetabular sphericity to be associated with higher hip instability. The present technique using subject-specific models revealed the in vivo hip joint contact area in a population of healthy individuals and dysplastic patients without radioactive exposure. These results can be used for analyzing disease progression in the dysplastic hip and pathogenesis of acetabular labral tear. (c) 2013 Orthopaedic Research Society Published by Wiley Periodicals, Inc. J Orthop Res 31:1611-1619, 2013