中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (31): 5025-5030.doi: 10.3969/j.issn.2095-4344.2017.31.018

• 骨与关节图像与影像 bone and joint imaging • 上一篇    下一篇

发育性髋关节发育不良IHDI分型与MRI病理形态的相关性

余京杭,刘 双,李连永,王恩波,张立军   

  1. 中国医科大学附属盛京医院小儿骨科,辽宁省沈阳市 110004
  • 出版日期:2017-11-08 发布日期:2017-12-01
  • 通讯作者: 李连永,博士,教授,主任医师,中国医科大学附属盛京医院小儿骨科,辽宁省沈阳市 110004
  • 作者简介:余京杭,男,1988年生,湖北省黄石市人,汉族,中国医科大学附属盛京医院小儿骨科在读硕士,医师,主要从事小儿发育性髋关节发育不良的临床及科研工作。
  • 基金资助:

    国家自然科学基金(81371918);辽宁省教育厅重点实验室基础研究项目(LZ2014036)

Correlation of the pathologic morphology on MRI with International Hip Dysplasia Institute classification in developmental dysplasia of the hip  

Yu Jing-hang, Liu Shuang, Li Lian-yong, Wang En-bo, Zhang Li-jun   

  1. Department of Pediatric Orthopedics, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning Province, China
  • Online:2017-11-08 Published:2017-12-01
  • Contact: Li Lian-yong, M.D., Professor, Chief physician, Department of Pediatric Orthopedics, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning Province, China
  • About author:Yu Jing-hang, Studying for master’s degree, Physician, Department of Pediatric Orthopedics, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81371918; the Basic Research Project of Key Laboratory of Department of Education of Liaoning Province, No. LZ2014036

摘要:

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文题释义:
软骨性髋臼指数(CAI):是评价髋臼发育及判断预后的重要参考指标,它是真正的髋臼顶部的边缘,而骨性髋臼指数仅代表软骨性髋臼顶的骨化程度,因此软骨性髋臼指数更具有临床参考价值。
发育性髋关节发育不良(developmental dysplasia of the hip,DDH):传统诊断名称为先天性髋关节脱位(congenital dislocation of the hip,CDH),1991年美国骨科学会(AAOS)和北美小儿骨科学会(POSNA)统一称之为发育性髋关节发育不良或发育性髋关节脱位。发育性髋关节发育不良是指由于髋臼发育缺陷造成髋臼对股骨头的覆盖不良,导致长期生物力学的异常而逐渐出现股骨头半脱位、负重区软骨退变及股骨头局灶性坏死、严重骨关节炎的一种疾病,主要病理改变表现为髋臼外上方和前方缺损,髋臼变浅,髋关节中心外移,致使髋臼对股骨头的包容与覆盖不足。发育性髋关节发育不良可以伴有髋关节不同程度的半脱位。由于髋臼对股骨头覆盖率减低,髋臼和股骨头关节面对合关系不正常,最后导致关节面的接触应力增高,关节软骨退变而引起髋关节骨性关节炎。
 
摘要
背景:Tönnis分型是发育性髋关节发育不良脱位程度的常用分型方法,但其应用受股骨头骨骺核是否骨化的限制。针对这一缺点,国际髋关节发育不良协会(International Hip Dysplasia Institute,IHDI)提出了新的分型方法(IHDI分型),但IHDI分型与相对应的发育性髋关节发育不良病理改变如何,尚无报道。
目的:分析IHDI分型与髋关节MRI病理形态的相关性。
方法:回顾性分析发育性髋关节发育不良患儿的术前影像资料共65例(89髋),平均年龄20.4个月。按IHDI标准进行分型,并在MRI图像上,观察头臼关系、盂唇的形态,并测量软骨性髋臼指数,分析IHDI分型与髋关节病理形态的相关性。
结果与结论:①IHDI分型与年龄呈正相关(r=0.456,P < 0.001);②随IHDI分型的增加,头臼关系由部分形成关节逐渐过度到完全不形成关节,软骨髋臼指数也明显增大(P=0.028);③Ⅰ型髋盂唇均为外翻形,而内翻或骑跨形的盂唇在Ⅱ型髋中占60%,Ⅲ型中占86%,Ⅳ型髋为97%;④结果表明,发育性髋关节发育不良随IHDI分型的增加,头臼间的覆盖率逐渐减小,软骨性髋臼缘发育不良及盂唇内翻程度逐渐加重。了解IHDI分型与髋关节病理形态的相关性对指导发育性髋关节发育不良治疗具有重要意义。
 
中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程
ORCID:0000-0001-7233-7380(余京杭)

关键词: 骨科植入物, 关节植入物, 发育性髋关节发育不良, IHDI分型, 磁共振, 病理形态, 盂唇, 软骨髋臼指数, 国家自然科学基金

Abstract:

BACKGROUND: Tönnis classification is commonly used to quantify the severity of developmental dysplasia of the hip (DDH), which relies on the presence of the epiphyseal ossification centre. Thereafter, a new classification system (IHDI method) has been developed by the International Hip Dysplasia Institute (IHDI). However, the pathologic morphology has not been defined based on the IHDI grade.

OBJECTIVE: To analyze the correlation of the pathologic changes of the hip on MRI with IHDI classification.
METHODS: Image data of 65 infants (89 hips) with DDH were analyzed retrospectively, with an average age of 20.4 months. The radiographic severity was graded by IHDI system, and the correlation between IHDI classification and pathological changes of the hip was analyzed, by observing the morphology and position of the limbus, and the cartilaginous acetabular index.

RESULTS AND CONCLUSION: (1) A positive correlation was detected between severity of the IHDI grades and age at reduction (r=0.456, P < 0.001). (2) Unexpectedly, the cartilaginous femoral epiphysis still remained contacting with the acetabulum in a part of type III DDH. The cartilaginous acetabular index was significantly increased with IHDI grade increasing (P=0.028). (3) The limbus was everted in all of the type I hips; however, inverted or mixed shape accounted about 60% in the type II hips, 86% in the type III, and 97% in the type IV, respectively. (4) These results manifest that the DDH was severer, and the limbus trended to be more inverted with the increasing in IHDI grade. Moreover, understanding the correlation of the pathologic morphology with the IHDI classification is of great significance for planning an appropriate treatment scheme for DDH.

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程

Key words: Hip Joint, Magnetic Resonance Imaging, Pathology, Acetabulum

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