Where is the neck?

Bouma, Heinse W.; Slot, Niels-Jan; Toogood, Paul; Pollard, T. C. B.; Kampen, Paulien M. van; Hogervorst, Tom

doi:10.3109/17453674.2014.899841

Cited by 21 publications

(19 citation statements)

References 15 publications

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“…Another controversial subject is the femoral neck/shaft angle measurement, and alpha angle measurement in these patients whose femoral head's center of rotation has changed. These measurements should be different from the traditional description because in the latter, the femoral head is centralized on the femoral neck, whereas in SCFE patients, the femoral head is not centralized on the femoral neck [19]. This situation has not been questioned and discussed previously in the literature in patients with SCFE.…”

Section: Discussionmentioning

confidence: 89%

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Correlation of Functional and Radiological Results with Three-Dimensional Gait Analysis in Patients with Unilateral Slipped Capital Femoral Epiphysis

et al. 2020

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Bu çalışmanın amacı femur başı epifiz kayması (FBEK) nedeniyle opere edilen hastalarda yürüme analizi ile klinik ve radyolojik sonuçların korelasyonunu değerlendirmekti. Hastalar ve Yöntem: Bu çalışmaya ortalama takibi 3.3 ± 1.4 yıl olan tek taraflı FBEK tanısıyla opere edilen 31 hasta dahil edildi. Klinik değerlendirme Harris kalça skoru (HKS) ve Pediatrik Veri Toplama Aracı (PVTA) skoru ile yapıldı. Radyolojik değerlendirme için kayma açısı, alpha alçısı, lateral femur başı oranı, artikulotrokanterik mesafe (ATM), ön-arka planda femur başı oranı, anterior başboyun offset oranı ve boyun şaft açısı ölçümü yapıldı. Yaş eşleşmeli 20 sağlıklı bireyden kontrol grubu oluşturuldu. Bulgular: PVTA transfer ve temel mobilite alt ölçeği; pelvis tilt eklem hareket açıklığı (EHA) (r = −0.7, p <0.001), ayak ilerleme açısı EHA (r =−0.4, p=0.02) ve ortalama omurga tilti (r=−0.6, p<0.001) ile anlamlı korelasyon gösterdi. Ayrıca ayak ilerleme açısı ile HKS (r=−0.5, p<0.001) ve PVTA ağrı/konfor alt ölçeği anlamlı korelasyon gösterdi (r=−0.5, p=0.015). Lateral femur başı oranı ile ortalama kalça fleksiyonu (r=−0.5, p<0.001), pelvik tilti (r=−0.4, p=0.04) ve ortalama omurga tilti (r=0.6, p<0.001) koreleydi. ATM ile ortalama kalça iç rotasyonu (r=0.5, p=0.03) ve ortalama ayak bileği ekstansiyonu (r=−0.4, p=0.03) koreleydi. Alfa açısı, Ön-arka femur başı oranı ve anterior baş boyun ofsetinin kinematik değerlerle korelasyonu gösterilemedi. Sonuç: FBEK nedeniyle opere edilen hastalarda klinik skorlar çoğunlukla pelvik tilt EHA, ayak ilerleme açısı ve omurga tilti ile korelasyon gösterirken, radyolojik sonuçlardan lateral femur başı oranı ve ATM'nin yürüme fonksiyonu ile ilişkili olduğu anlaşılmıştır.

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Section: Discussionmentioning

confidence: 89%

“…The mean age of patients when gait analyses were performed was 16.5 ± 2.5 years, and mean body mass index (BMI) was 27.78±5. 6 [16][17][18][19][20], with a mean BMI of 27.72±2.61 kg/m2. The SCFE and control groups were similar in age (p = 0.51) and BMI (p = 0.21).…”

Section: Methodsmentioning

confidence: 99%

Correlation of Functional and Radiological Results with Three-Dimensional Gait Analysis in Patients with Unilateral Slipped Capital Femoral Epiphysis

et al. 2020

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“…The maximum radial alpha angle on MRI was compared with the alpha angles on 3 different radiographic views as previously described: AP view of the pelvis, cross-table lateral view, and 45° Dunn view. 5 The method proposed by Bouma et al 4 was used for measurements of the alpha angle. Briefly, the axis of the femoral neck was defined as the line passing through the center of the femoral head circle, parallel to the line connecting the center of 2 circles placed over the femoral neck ( Figure 1 ).…”

Section: Methodsmentioning

confidence: 99%

Correlations and Reproducibility Between Radiographic and Radial Alpha Angles in the Evaluation of Cam Morphology

Kobayashi

Sumi

Higashihira

et al. 2020

Orthopaedic Journal of Sports Medicine

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Background: The alpha angle used to evaluate cam morphology can be determined on different imaging views; however, 2-dimensional (2D) imaging can present limitations in terms of the reproducibility of the radial alpha angle. Recent developments in 3-dimensional (3D) high-resolution magnetic resonance imaging (MRI) have allowed detailed evaluations of the radial alpha angle. Purpose: To determine whether there are any correlations or discrepancies between the 2D alpha angle on plain radiography and the maximum radial alpha angle on 3D MRI. Study Design: Cohort study (diagnosis); Level of evidence, 2. Methods: A total of 42 hips from 39 patients (19 males, 20 females) were analyzed, including 22 hips with femoroacetabular impingement (FAI; mean age, 41 years) and 20 hips with borderline developmental dysplasia of the hip (BDDH; mean age, 43 years). Radial images were reconstructed from 3D multiple echo recombined gradient echo (MERGE) MRI. Differences in the maximum radial alpha angle on MRI between hips with FAI and BDDH were evaluated. Correlations and discrepancies between the maximum radial alpha angle on MRI and alpha angles on the anteroposterior, cross-table lateral, and 45° Dunn views of radiography were also evaluated. Results: The maximum radial alpha angle was significantly higher for hips with FAI than for hips with BDDH. On average, the greatest alpha angle on radial MRI was higher than the alpha angle on each of the 3 radiographic views for both FAI and BDDH. The 45° Dunn view revealed the smallest discrepancy for both FAI ( P = .005) and BDDH ( P = .002). The cross-table lateral view had the highest correlation with the maximum radial alpha angle for BDDH ( P < .001). Conclusion: We reconfirmed the utility of the 45° Dunn view, with it presenting the best reproducibility for the maximum radial alpha angle in the evaluation of cam morphology, while the cross-table lateral view revealed the best correlation with the maximum radial alpha angle, particularly for hips with BDDH.

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“…The table top plane (TTP) aligned the most posterior points of the greater trochanter and femoral condyles with the vertical line through the trochanteric fossa and the knee center was used as the reference to measure femoral anteversion . The femoral neck axis (FNA) was determined by aligning the coronal and sagittal planes with the femoral neck with the assistance of three circles (Figure ), similar to the method used by Bouma et al…”

Section: Methodsmentioning

confidence: 99%

“…The angle between the femoral head‐acetabular sourcil line and the vertical line on the crosshairs on 3D Template (corresponding to the APP or FPP) was the LCEA. Femoral alpha angles were measured in the sagittal and coronal planes using the method proposed by Bouma et al Finally, the femoral length was measured using the method in Zech et al…”

Section: Methodsmentioning

confidence: 99%

Gender and disease severity determine proximal femoral morphology in developmental dysplasia of the hip

Boughton

Uemura

Tamura

et al. 2019

Journal Orthopaedic Research

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In this computed tomography (CT) morphological study we describe the way the proximal femoral morphology differs with worsening degrees of developmental dysplasia of the hip (DDH) and describe gender differences in patients with DDH. Forty-nine male patients with DDH were matched with 49 females with DDH, using age and the Crowe classification of DDH severity. The femoral length, anteversion, neck-shaft angle, offset, neck length, canal-calcar ratio, canal flare index, lateral center-edge angle, alpha angle, pelvic tilt, and pelvic incidence were measured for each patient on their pre-operative CT scans, prior to total hip arthroplasty surgery. Femoral anteversion and neck length were 16˚and 47 mm, 25˚and 36 mm, 26˚and 43 mm, and 44˚and 36 mm, for Crowe I and III males and Crowe I and III females, respectively. The mean male anteversion was 22˚(AE14), compared to 30˚(AE15.5) in females (p ¼ 0.02, Confidence Interval: 1.6-14.9). Gender differences in femoral length, neck length and offset lost significance when heightnormalized and no other significant gender differences were found. In conclusion, femoral neck length reduces with increasing DDH severity, whilst anteversion tends to increase. Male patients with DDH have significantly less femoral anteversion, which has important implications for osteotomy and arthroplasty surgery in DDH. ß

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Where is the neck?

Cited by 21 publications

References 15 publications

Correlation of Functional and Radiological Results with Three-Dimensional Gait Analysis in Patients with Unilateral Slipped Capital Femoral Epiphysis

Correlation of Functional and Radiological Results with Three-Dimensional Gait Analysis in Patients with Unilateral Slipped Capital Femoral Epiphysis

Correlations and Reproducibility Between Radiographic and Radial Alpha Angles in the Evaluation of Cam Morphology

Gender and disease severity determine proximal femoral morphology in developmental dysplasia of the hip

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