Femoral neck-shaft angle can predict the anterior capsular thickness in patients with femoracetabular impingement syndrome

Yang, Fan; Zhang, Zhu; Zhang, Xin; Huang, Hongjie; Wang, Jianquan

doi:10.1007/s00167-023-07347-6

Knee Surg Sports Traumatol Arthrosc

2023

DOI: 10.1007/s00167-023-07347-6

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Femoral neck-shaft angle can predict the anterior capsular thickness in patients with femoracetabular impingement syndrome

Fan Yang

Zhu Zhang

Xin Zhang

et al.

Abstract: Purpose To measure the femoral neck-shaft angle (NSA) on computed tomography (CT) images in femoracetabular impingement syndrome (FAIS) patients and explore its relationship with the anterior capsular thickness (ACT). Methods A retrospective review of prospectively collected data from 2022 was performed. Inclusion criteria included: primary hip surgery, 18 to 55 years of age, and CT imaging of the hips. Exclusion criteria included: revision hip surgery, mild or borderline hip dysplasia, hip synovitis, and inco… Show more

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Femoral Anteversion Angle as a Predictor of Anterior Hip Labral Length in Patients With Femoroacetabular Impingement Syndrome

Zhang,

Gao,

Liu

et al. 2024

Orthopaedic Journal of Sports Medicine

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Background: The relationship between hip rotational abnormalities and hip labral size has not been fully investigated. Purposes: To (1) examine the correlation between rotational abnormalities of the hip and labral size, while also identifying other predictive values for hip labral size, and (2) explore whether femoral torsion will lead to increased labral size. Study Design: Cross-sectional study; Level of evidence, 3. Methods: A total of 180 patients (180 hips) with femoroacetabular impingement syndrome (FAIS) (mean age, 36.81 ± 10.17 years; 67 male, 113 female) who underwent hip arthroscopic surgery between January 2021 and May 2022 were included. The femoral version (FV), acetabular version, and combined version angles were measured on computed tomography, and the labral length and height at the 12-o’clock and 3-o’clock positions were measured on magnetic resonance imaging. The hips were categorized into 3 groups based on FV angle: small (SFV; <10°); moderate (MFV; ≥10° and ≤20°), and large (LFV; >20°), and group comparisons were performed. Linear correlation and regression analysis were employed. Results: Predictive factors for labral length were FV angle (β = 0.298; P = .02), sex (β = −0.302; P < .001), and age (β = −0.169; P = .016) at 3 o’clock and lateral center-edge angle (LCEA; β = −0.208; P = .005) and age (β = −0.186; P = .011) at 12 o’clock. FV angle was positively correlated with labral length at 3 o’clock ( r = 0.267; P < .001) and negatively correlated with age ( r = −0.222; P = .003) and female sex ( r = −0.202; P = .006). LCEA ( r = −0.227; P = .002) and age ( r = −0.205; P = .006) were negatively correlated with labral length at 12 o’clock. Labral length at 3 o’clock was significantly different between the LFV (n = 49 hips), MFV (n = 65 hips), and SFV (n = 66 hips) groups (9.85 ± 2.28, 8.89 ± 2.44, and 8.30 ± 2.05 mm, respectively; P = .027 for LFV vs MFV; P < .001 for LFV vs SFV). Conclusion: Patients with FAIS who exhibited a higher FV angle were at a greater likelihood of having a larger anterior labral length. Increased femoral anteversion and decreased LCEA, male sex, and younger age were significantly associated with longer hip labral length.

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Femoral Anteversion Angle as a Predictor of Anterior Hip Labral Length in Patients With Femoroacetabular Impingement Syndrome

Zhang,

Gao,

Liu

et al. 2024

Orthopaedic Journal of Sports Medicine

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Factors associated with early failure of the femoral neck system (FNS) in patients with femoral neck fractures

Chen,

Jiang,

et al. 2023

BMC Musculoskelet Disord

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Background Femoral neck system (FNS) is a new type of internal fixation system which has been widely used for treating femoral neck fractures (FNFs).Compared with other internal fixation methods, FNS is minimally invasive and stable, and often achieves satisfactory short-term efficacy.Early failure of FNS (EFFNS) is not uncommon, however, there are few literatures and reports on factors associated with EFFNS.This study aimed to survey the prevalence and risk factors of EFFNS. Methods We retrospectively analysed 62 patients with FNFs and underwent FNS fixation between 2019 and 2021. Demographic data, clinical characteristics, radiographic features and treatment process were described. Multifactor logistic regression analysis was used to analyse the different influencing factors. Results Out of the 62 FNFs patients, 10 patients (16.1%) developed EFFNS, including 6 cases of severe femoral neck shortening, 2 cases of screw-out, 1 case of avascular necrosis of the femoral head and 1 case of nonunion. In the failure group, all patients were younger than 65 years old, which was significantly higher than 59.6% in the healing group (P = 0.012). There were no significant differences in sex(P = 0.490), BMI (P = 0.709), injured side (P = 0.312), injury mechanism (P = 0.617), reduction method(P = 0.570),femoral neck-shaft angle(P = 0.545), Pauwels classification (P = 0.564) and Garden classification (P = 0.195). Moreover, we not found that Garden classification (P = 0.464) and age (P = 0.128) were statistically significant risk factors for EFFNS at multivariate analysis. Conclusion In this study, sex, BMI, injury side, injury mechanism, reduction method, Pauwels angle, femoral neck-shift angle, Pauwels classification and Garden classification were excluded as EFFNS risk factors. Moreover, our study demonstrated that age and Garden classification were not significant risk factors at multivariate analysis. Trial registration ChiCTR, ChiCTR2100051360. Registered on 21 September, 2021. https://www.chictr.org.cn/index.aspx.

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Femoral neck-shaft angle can predict the anterior capsular thickness in patients with femoracetabular impingement syndrome

Cited by 2 publications

References 20 publications

Femoral Anteversion Angle as a Predictor of Anterior Hip Labral Length in Patients With Femoroacetabular Impingement Syndrome

Femoral Anteversion Angle as a Predictor of Anterior Hip Labral Length in Patients With Femoroacetabular Impingement Syndrome

Factors associated with early failure of the femoral neck system (FNS) in patients with femoral neck fractures

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