Femoral bowing plane adaptation to femoral anteversion

Akman, Alp; Demirkan, Fahir; Sabir, Nuran; Oto, Murat; Yorukoglu, Cagdas; Kiter, Esat

doi:10.4103/0019-5413.197219

Cited by 4 publications

(5 citation statements)

References 37 publications

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“…However, anterolateral bowing is usually associated with femoral anteversion and is perpendicular to femoral neck anteversion plane. [25] Third, we could not evaluate the effect of lower limb alignment on the location of AFF in current study because only a small number of patients had preinjured standing full-length lower limb radiographs. Lower limb alignment could be influenced on the location of AFFs by change of mechanical stress distribution on the femur.…”

Section: Discussionmentioning

confidence: 99%

Localization of Atypical Femoral Fracture on Straight and Bowed Femurs

2019

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Background To elucidate the effect of anterolateral bowing on the fracture height of atypical femoral fractures (AFFs), we separated the AFFs into 2 groups according to the presence of anterolateral femoral bowing (straight group and bowing group) and analyzed the fracture height. The aims of this study were to evaluate the clinical and radiological features of AFFs in the straight group and bowing group, and to determine which factors were associated with the fracture height of AFFs in the total cohort and each subgroup. Methods Ninety-nine patients with AFFs were included in this study (43 patients in the bowing group and 56 patients in the straight group). Clinical and radiological characteristics were compared between the groups. Multivariable linear regression analysis was performed to determine the effect of factors on fracture height. Results Patients in the straight group were younger, heavier, and taller, and had a higher bone mineral density, smaller anterior and lateral bowing angles, and more proximal fracture height than those in the bowing group. Multivariable analysis showed that the presence of anterolateral bowing itself and height were associated with fracture height in the total cohort. In the subgroup analysis, the lateral bowing angle in the straight group and the estimated apex height in the bowing group were associated with fracture height. The lateral bowing angle was not significantly associated with fracture height in the total cohort and the bowing group. Conclusions The presence of anterolateral bowing and the level of the apex of the bowed femur were important factors for the fracture height of AFFs.

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Section: Discussionmentioning

confidence: 99%

Localization of Atypical Femoral Fracture on Straight and Bowed Femurs

2019

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“…There is no consensus on the relationship between the mechanical alignment of the lower extremity and the degree of FA in patients with OA knees in the few studies that address this issue [ 4 , 19 ]. Moon et al [ 4 ] assessed the degree of FA using the transepicondylar axis (tFA) instead of the conventional method of using the posterior condylar axis to eliminate the influence of the posterior condyle [ 1 , 9 , 17 ]. They found no correlation between the coronal alignment and the degree of FA, so they believe that the correlation between mechanical alignment and FA can be mainly attributed to the relationship between the posterior condylar geometry and the coronal alignment.…”

Section: Discussionmentioning

confidence: 99%

High femoral anteversion in osteoarthritic knees, particularly for severe valgus deformity

et al. 2022

J Orthop Traumatol

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Objective Increased femoral anteversion (FA) has been correlated with less varus deformities in osteoarthritic (OA) knees, but the relationship between FA and the degree of valgus deformity in osteoarthritic (OA) knees is still largely unknown. We aimed to thoroughly analyze the distribution of FA in relation to varus or valgus deformities of the lower extremity in OA knees, and to further clarify the relationship between FA and trochlear morphology. Methods 235 lower extremities with OA knees were divided into five groups according to the mechanical tibiofemoral angle: excessive valgus (< − 10°), moderate valgus (− 10° to − 3°), neutral (− 3° to 3°), moderate varus (3° to 10°), and excessive varus (> 10°). FA (measured using the posterior condylar axis [pFA] and the transepicondylar axis [tFA]) was measured, and the relationships of FA to the mechanical tibiofemoral angle and femoral trochlear morphology were identified. Results Excessive FA (pFA ≥ 20°) was observed in 30.2% of all patients and in 58.8% of patients in the excessive valgus group. pFA showed a strong correlation with mechanical tibiofemoral angle (p = 0.018). Both the pFA and the tFA of patients in the excessive valgus group were greater than those in other four groups (all p ≤ 0.037). There were significant correlations between tFA and trochlear parameters, including the sulcus angle (SA), lateral trochlear slope (LTS), and medial trochlear slope (MTS) (all p ≤ 0.028). Conclusion High FA is prevalent, particularly in severe valgus knees, and FA is significantly related to the femoral trochlear morphology in OA knees. With the aim of improving the patellofemoral prognosis and complications, high FA should be considered during total knee arthroplasty.

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“…Several studies have been done on the CDA. It is widest at birth and diminishes until adolescence (Akman et al, 2017). Most of these studies showed regional and racial variations (Buford Jr. et al, 2014;Khan and Saheb, 2014;Romanes, 2012).…”

Section: Introductionmentioning

confidence: 98%

“…The CDA (collodiaphyseal angle, angle of inclination) corresponds to the angle formed between the femoral neck axis and the diaphysis axis (Vemavarapu et al, 2016). This differs from the anteversion angle (angle of declination) which is the angle formed by the femoral condyles plane (bicondylar plane) and a plane passing through the centre of the neck of femoral head (Akman et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Collodiaphyseal angle in the diagnosis of coxa vara and coxa valga in adult Nigerans

Abiodun¹,

Ikem²,

Adeyemi³

et al. 2018

Int. J. Med. Med. Sci.

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Collodiaphyseal angle (CDA) is the angle formed between the femoral neck axis and the diaphysis axis. The aims of this study were to determine the normal range of collodiaphyseal angle in adults and to determine any difference in the collodiaphyseal angle between right and left femur and also between sexes. 340 subjects consisting of 170 (50%) males and 170 (50%) females were included in this study. Plain radiographs were taken with the patients lying supine and the medial malleoli touching each other to prevent the hips being laterally rotated. Films were shot at a film focal distance (FFD) of 90 cm to minimize magnification. Measurements were taken with calibrated ruler and the collodiaphyseal angle was measured using goniometer. Results showed a normal range of CDA among Nigerian males as mean ± SD of (133.2° ± 7.6) for the right and mean ± SD of (131.1° ± 7.3) for the left. In females, it was (125.1° ± 6.9) on the right and (123.0° ± 6.9) on the left. Based on the study, coxa vara and coxa valga could be diagnosed on the normal range of collodiaphyseal angle in Ile-Ife (118°-145° in males and 110°-138° females). There is also sex variation and difference in CDA between right and left femur.

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Femoral bowing plane adaptation to femoral anteversion

Cited by 4 publications

References 37 publications

Localization of Atypical Femoral Fracture on Straight and Bowed Femurs

Localization of Atypical Femoral Fracture on Straight and Bowed Femurs

High femoral anteversion in osteoarthritic knees, particularly for severe valgus deformity

Collodiaphyseal angle in the diagnosis of coxa vara and coxa valga in adult Nigerans

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