The Effect of the False Acetabulum on Femoral Proximal Medullary Canal in Unilateral Crowe Type IV Developmental Dislocation of the Hip

Yinqiao Du,* Tiejian Li,* Jingyang Sun, Ming Ni, Yonggang Zhou Department of Orthopedics, Chinese People’s Liberation Army General Hospital, Beijing 100853, People’s Republic of China*These authors contributed equally to this workCorrespondence: Yonggang Zhou; Ming Ni Email ygzho...

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Autores principales: Du Y, Li T, Sun J, Ni M, Zhou Y
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Publicado: Dove Medical Press 2020
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spelling oai:doaj.org-article:f910831a16ee465b89e7326e65eb2fa92021-12-02T13:10:20ZThe Effect of the False Acetabulum on Femoral Proximal Medullary Canal in Unilateral Crowe Type IV Developmental Dislocation of the Hip1178-203Xhttps://doaj.org/article/f910831a16ee465b89e7326e65eb2fa92020-07-01T00:00:00Zhttps://www.dovepress.com/the-effect-of-the-false-acetabulum-on-femoral-proximal-medullary-canal-peer-reviewed-article-TCRMhttps://doaj.org/toc/1178-203XYinqiao Du,* Tiejian Li,* Jingyang Sun, Ming Ni, Yonggang Zhou Department of Orthopedics, Chinese People’s Liberation Army General Hospital, Beijing 100853, People’s Republic of China*These authors contributed equally to this workCorrespondence: Yonggang Zhou; Ming Ni Email ygzhou301@163.com; niming301@163.comPurpose: To investigate the effect of the false acetabulum on femoral proximal medullary canal in unilateral Crowe type IV developmental dislocation of the hip (DDH) patients on anteroposterior radiographs.Patients and Methods: We measured the following parameters of DDH and contralateral normal hip (CNH) of proximal morphology of femurs on 65 patients with unilateral Crowe type IV DDH (30 hips with no false acetabulum (type IVA) and 35 hips with a false acetabulum (type IVB)) in our hospital between September 2009 and July 2019 on anteroposterior radiographs: the widths of medullary canals at 20 mm above the center of lesser trochanter (CLT), 20 mm below the CLT and the isthmus. Canal flare index (CFI), metaphyseal canal flare index (MCFI), diaphyseal canal flare index (DCFI) were calculated.Results: The values of CFI of DDH and CNH in unilateral type IVA patients were 2.8 and 4.4, respectively (p < 0.001), and those in type IVB patients were 3.9 and 4.6, respectively (p < 0.001). The MCFIs of DDH and CNH in type IVA group were 2.2 and 2.3, respectively (p = 0.032), and those in type IVB group were 2.4 and 2.4, respectively (p = 0.242). The DCFIs of DDH and CNH in type IVA group were 1.3 and 1.9, respectively (p < 0.001), and those in type IVB group were 1.7 and 1.9, respectively (p = 0.002).Conclusion: The false acetabulum stimulated the development of the proximal femur in Crowe type IV DDH. The variation of the femoral proximal medullary canal in type IVA DDH mainly occurred at the metaphyseal and proximal diaphyseal levels, and that in type IVB DDH mainly occurred at the proximal diaphyseal level.Keywords: developmental dysplasia of the hip, Crowe type IV, femoral morphology, total hip arthroplastyDu YLi TSun JNi MZhou YDove Medical Pressarticledevelopmental dysplasia of the hipcrowe type ivfemoral morphologytotal hip arthroplastyTherapeutics. PharmacologyRM1-950ENTherapeutics and Clinical Risk Management, Vol Volume 16, Pp 631-637 (2020)
institution DOAJ
collection DOAJ
language EN
topic developmental dysplasia of the hip
crowe type iv
femoral morphology
total hip arthroplasty
Therapeutics. Pharmacology
RM1-950
spellingShingle developmental dysplasia of the hip
crowe type iv
femoral morphology
total hip arthroplasty
Therapeutics. Pharmacology
RM1-950
Du Y
Li T
Sun J
Ni M
Zhou Y
The Effect of the False Acetabulum on Femoral Proximal Medullary Canal in Unilateral Crowe Type IV Developmental Dislocation of the Hip
description Yinqiao Du,* Tiejian Li,* Jingyang Sun, Ming Ni, Yonggang Zhou Department of Orthopedics, Chinese People’s Liberation Army General Hospital, Beijing 100853, People’s Republic of China*These authors contributed equally to this workCorrespondence: Yonggang Zhou; Ming Ni Email ygzhou301@163.com; niming301@163.comPurpose: To investigate the effect of the false acetabulum on femoral proximal medullary canal in unilateral Crowe type IV developmental dislocation of the hip (DDH) patients on anteroposterior radiographs.Patients and Methods: We measured the following parameters of DDH and contralateral normal hip (CNH) of proximal morphology of femurs on 65 patients with unilateral Crowe type IV DDH (30 hips with no false acetabulum (type IVA) and 35 hips with a false acetabulum (type IVB)) in our hospital between September 2009 and July 2019 on anteroposterior radiographs: the widths of medullary canals at 20 mm above the center of lesser trochanter (CLT), 20 mm below the CLT and the isthmus. Canal flare index (CFI), metaphyseal canal flare index (MCFI), diaphyseal canal flare index (DCFI) were calculated.Results: The values of CFI of DDH and CNH in unilateral type IVA patients were 2.8 and 4.4, respectively (p < 0.001), and those in type IVB patients were 3.9 and 4.6, respectively (p < 0.001). The MCFIs of DDH and CNH in type IVA group were 2.2 and 2.3, respectively (p = 0.032), and those in type IVB group were 2.4 and 2.4, respectively (p = 0.242). The DCFIs of DDH and CNH in type IVA group were 1.3 and 1.9, respectively (p < 0.001), and those in type IVB group were 1.7 and 1.9, respectively (p = 0.002).Conclusion: The false acetabulum stimulated the development of the proximal femur in Crowe type IV DDH. The variation of the femoral proximal medullary canal in type IVA DDH mainly occurred at the metaphyseal and proximal diaphyseal levels, and that in type IVB DDH mainly occurred at the proximal diaphyseal level.Keywords: developmental dysplasia of the hip, Crowe type IV, femoral morphology, total hip arthroplasty
format article
author Du Y
Li T
Sun J
Ni M
Zhou Y
author_facet Du Y
Li T
Sun J
Ni M
Zhou Y
author_sort Du Y
title The Effect of the False Acetabulum on Femoral Proximal Medullary Canal in Unilateral Crowe Type IV Developmental Dislocation of the Hip
title_short The Effect of the False Acetabulum on Femoral Proximal Medullary Canal in Unilateral Crowe Type IV Developmental Dislocation of the Hip
title_full The Effect of the False Acetabulum on Femoral Proximal Medullary Canal in Unilateral Crowe Type IV Developmental Dislocation of the Hip
title_fullStr The Effect of the False Acetabulum on Femoral Proximal Medullary Canal in Unilateral Crowe Type IV Developmental Dislocation of the Hip
title_full_unstemmed The Effect of the False Acetabulum on Femoral Proximal Medullary Canal in Unilateral Crowe Type IV Developmental Dislocation of the Hip
title_sort effect of the false acetabulum on femoral proximal medullary canal in unilateral crowe type iv developmental dislocation of the hip
publisher Dove Medical Press
publishDate 2020
url https://doaj.org/article/f910831a16ee465b89e7326e65eb2fa9
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