Femoral anteversion: significance and measurement

Scorcelletti, Matteo; Reeves, Neil D.; Rittweger, Jörn; Ireland, Alex

doi:10.1111/joa.13249

Cited by 102 publications

(112 citation statements)

References 159 publications

(411 reference statements)

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“…However, especially after 3 years old, most of them needed surgical treatment, such as osteotomy [ 2 ]. Femoral neck anteversion angle (FNA) enlargement is also one of the important pathological changes of DDH [ 3 , 4 ]. In 1954, Billing [ 5 ] clearly defined FNA as the angle between the femoral neck axis and condylar plane (determined by the femoral shaft axis and the femoral condyle axis), which has been widely recognized [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

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Accuracy of CT for measuring femoral neck anteversion in children with developmental dislocation of the hip verified using 3D printing technology

et al. 2021

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Background Accurate femoral neck anteversion angle (FNA) measurement is of great significance in the diagnosis and treatment of developmental dysplasia of the hip (DDH) in children. The FNA measurement still remains a controversy. We aimed to verify the accuracy of our CT method by 3D printing technology and to evaluate its clinical value. Methods Sixty-eight children with unilateral DDH were enrolled, and their FNA was measured using 2D-CT and 3D-CT, respectively, by three observers. This procedure was repeated 3 months later. The above measurement outcomes were then compared with the results in the 3D-printed femur (3D-PF) model. The FNA in the 3D-PF model was measured by three observers (two radiologists and one orthopedist; all were professors) collectively through electronic angle instrument. Results The primary measurement of FNA at the affected hips by 2D-CT was 44.0 ± 6.1, 49.5 ± 8.9, and 52.8 ± 7.9°, respectively. On the 3D-CT, it was 47.6 ± 5.4, 49.3 ± 6.8, and 48.6 ± 6.2°. Three months later, the FNA on 2D-CT was 49.3 ± 10.5, 42.8 ± 7.4, and 45.1 ± 9.3°, and it was 48.0 ± 6.5, 48.9 ± 7.2, and 49.0 ± 5.7° on 3D-CT, respectively. The FNA in the 3D-PF model at the affected and unaffected hips was 48.5 ± 6.6 and 36.9 ± 13.1°. There were significant differences between 2D-CT and 3D-PF measurements, but no significant difference was found between 3D-CT and 3D-PF measurements. The results by 2D-CT showed significant differences among groups and between the groups. However, the results by 3D-CT had no significant differences among groups or between the groups. Conclusion The results of our study showed that 3D-CT is a more precise, and reproducible method for FNA measurement in DDH. The FNA at the affected hips is 11.6° larger than the unaffected in DDH children aged 3–8 years.

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Section: Introductionmentioning

confidence: 99%

“…There are many FNA measuring methods which still remain controversial [ 3 , 9 , 10 ]. Initially, FNA measurement was usually done by biplane X-ray method.…”

Section: Introductionmentioning

confidence: 99%

Accuracy of CT for measuring femoral neck anteversion in children with developmental dislocation of the hip verified using 3D printing technology

et al. 2021

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“…Developmental dysplasia of the hip (DDH) is commonly seen in pediatric orthopedics, and femoral neck anteversion angle (FNA) enlargement is one of the important pathological changes of DDH [1,2]. In 1954, Billing [3].…”

Section: Introductionmentioning

confidence: 99%

“…There are many FNA measuring methods which still remain controversial [1,7]. Initially, FNA measurement was usually done by biplane X-ray method.…”

Section: Introductionmentioning

confidence: 99%

Accuracy of CT for Measuring Femoral Neck Anteversion in Children With Developmental Dislocation of the Hip Verified Using 3D Printing Technology

Cai¹,

Piao

Zhang

et al. 2021

Preprint

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Background: Accurate femoral neck anteversion angle (FNA) measurement is of great significance in the diagnosis and treatment of developmental dysplasia of the hip (DDH) in children. The FNA measurement still remains a controversy. We aimed to verify the accuracy of our CT method by 3D printing technology , and to evaluate its clinical value. Methods: Sixty-eight children with unilateral DDH were enrolled, and their FNA was measured using 2D-CT and 3D-CT, respectively, by three observers. This procedure was repeated 3 months later. The above measurement outcomes were then compared with the results in the 3D-printed femur (3D-PF) model. The FNA in the 3D-PF model was measured by three observers collectively through electronic angle instrument. Results: The primary measurement of FNA at the affected hips by 2D-CT was 44.0±6.1, 49.5±8.9 and 52.8±7.9 degrees, respectively. On the 3D-CT, it was 47.6±5.4, 49.3±6.8 and 48.6±6.2 degrees. Three months later, the FNA on 2D-CT was 49.3±10.5, 42.8±7.4 and 45.1±9.3 degrees, and it was 48.0±6.5, 48.9±7.2 and 49.0±5.7 degrees on 3D-CT, respectively. The FNA in the 3D-PF model at the affected and unaffected hips was 48.5±6.6 and 36.9±13.1 degrees. There were significant differences between 2D-CT and 3D-PF measurements, but no significant difference was found between 3D-CT and 3D-PF measurements. The results by 2D-CT showed significant differences among groups and between the groups. However, the results by 3D-CT had no significant differences among groups or between the groups. Conclusion: The results of our study showed that 3D-CT is a more precise, and reproducible method for FNA measurement in DDH. The FNA at the affected hips is 11.6 degree larger than the unaffected in DDH children aged 3-8 years.

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“…Alt ekstremitedeki problemler ile ilişkili faktörlerden bir diğeri ise femoral anteversiyon açısı (FA-A)'ndaki değişimlerdir (7). Doğumdan sonra 30° olan FAA'nın, yetişkinlik dönemine kadar 15°'ye düşmesi beklenir (8). FAA'nın 20°'nin üzerine çıkmasının teniste sıkça tekrarlanan bir hareket olan kalça rotasyonunu etkilediği ve kalça eksternal rotatör ve ekstansor kaslarının kuvvet kontrolünde azalmaya yol açtığı bilinmektedir (9).…”

Section: Introductionunclassified

Adolesan Teni̇sçi̇lerde Kalça Kas Kuvveti̇ Ve Femoral Anteversi̇yon Açisinin Bi̇lateral Karşilaştirilmasi

YALKI¹

2021

Türk Fizyoterapi Ve Rehabilitasyon Dergisi

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Adolesan dönemde tekrarlı hareketler ve aşırı yüklenmeler ileri dönemlerde sporcuların yaralanma riskini arttırmaktadır. Tenisin tek taraflı bir spor olması kalça kas kuvvetini ve kalça biyomekaniğini etkilemektedir. Bu çalışmanın amacı, adolesan tenisçilerde kalça kas kuvvet profillerini ve femoral anteversiyon açısını (FAA) incelemek ve bilateral olarak karşılaştırmaktı.Yöntem: Çalışmaya önceden kalça yaralanması geçirmemiş olan 47 tenis sporcusu (yaş=11,35±1,69 yıl; vücut kütle indeksi=18,42±2,64 kg/m 2 ) dahil edildi. Kalça abduksiyonda eksternal rotasyon (HipSIT), abduksiyon, adduksiyon, fleksiyon, ekstansiyon, internal ve eksternal rotasyon izometrik kas kuvvetleri el dinamometresi ile ölçülerek kuvvet oranları hesaplandı. FAA Craig's Test ile ölçüldü. Değerlendirmelerin tamamı bilateral yapıldı.Sonuçlar: HipSIT değerinin dominant tarafta daha yüksek olduğu bulundu (p=0,034). Kalça eksternal rotasyon ve internal rotasyon kuvvet oranı ise dominant olmayan tarafta daha yüksek bulundu (p=0,038). FAA'nın dominant tarafta 11,94±1,43° olduğu bulundu, dominant olmayan tarafta ise 11,50±1,43° olmak üzere dominant tarafta daha yüksek olduğu görüldü (p=0,001). FAA değerlerinin normal sınırlar içinde (<15°) olduğu gözlendi.Tartışma: Çalışma sonuçlarına göre tenis sporcularında kalça kas kuvveti, kuvvet oranları ve FAA bilateral farklılık göstermektedir. Adolesan tenis sporcularında adaptasyona bağlı farklılıkların belirlenmesi ileri dönem potansiyel yaralanmaların saptanmasında oldukça önemlidir.

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Femoral anteversion: significance and measurement

Cited by 102 publications

References 159 publications

Accuracy of CT for measuring femoral neck anteversion in children with developmental dislocation of the hip verified using 3D printing technology

Accuracy of CT for measuring femoral neck anteversion in children with developmental dislocation of the hip verified using 3D printing technology

Accuracy of CT for Measuring Femoral Neck Anteversion in Children With Developmental Dislocation of the Hip Verified Using 3D Printing Technology

Adolesan Teni̇sçi̇lerde Kalça Kas Kuvveti̇ Ve Femoral Anteversi̇yon Açisinin Bi̇lateral Karşilaştirilmasi

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