scholarly journals Three-Dimensional Morphological Analysis of the Femoral Neck Torsion Angle - An Anatomical Study.

2020 ◽  
Author(s):  
Ru-yi Zhang ◽  
Xiu-yun Su ◽  
Jing-xin Zhao ◽  
Jian-tao Li ◽  
Li-cheng Zhang ◽  
...  
Keyword(s):  
Femoral Neck ◽  
Torsion Angle ◽  
Linear Regression Analysis ◽  
Three Dimensional ◽  
Anatomical Study ◽  
Ct Reconstruction ◽  
Methodological Foundation ◽  
Neck Fracture ◽  
The Difference ◽  
Neck Torsion

Abstract Background: The femoral neck torsion angle (FNTA) is a very important but often neglected parameter in assessments of the anatomical morphology of the femoral neck, and it is often confused with the femoral neck anteversion angle (FNAA) in the current literature. Currently, naked eye or two-dimensional literature (2D) visualization method was used in the literature that the measurement method reported, and the measurement parameters and details are not clearly defined. The objection of this research was to establish a three-dimensional (3D) method to measure the FNTA, and to analyse the anatomical and clinical significance of the results. Methods: Computed tomography (CT) data of 200 patients who received a lower extremity CT angiography examination were selected for the three-dimensional CT (3D CT) reconstruction of bilateral femurs by using Mimics software. The 3D axis of the femoral neck was built, and the FNTAs of the isthmus and the basilar part were measured using the “inertia axes” method. SPSS software was used for statistical analyses. Results: The difference in FNTA was statistically significant between the isthmus and the basilar part (isthmus 30.58 ± 8.90° vs. basilar part 23.79 ± 3.98°; p < 0.01). Significant differences in the FNTA were observed between the sexes (males 31.99 ± 9.25° vs. females 27.49 ± 7.19°; p < 0.01). The increase in FNTA from the basilar part to the isthmus was 6.79 ± 8.06°, and the increase observed in men (7.87 ± 8.57°) was larger than that in women (4.44 ± 6.23°, p < 0.01). However, no significant differences in the values were observed between sides. According to the correlation analysis, height exerted the greatest effect on the FNTA (r = 0.255, p＜0.001), and the stepwise linear regression analysis produced the following final regression model: Y = -27.685 + 35.134 × HEIGHT (p < 0.001, R2 = 0.095). Conclusions: This study provides a new and reliable 3D method for measuring the FNTA. The method and results provide a methodological foundation and theoretical support for the research and development of internal fixation devices and configurations of the space for an implant designed to treat a femoral neck fracture. And, the optimal opening point of the femoral medullary cavity is recommended to be located at the posterior position of the top of the femoral neck cross-section during hip replacement.

scholarly journals Three-dimensional morphological analysis of the femoral neck torsion angle—an anatomical study

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Ru-Yi Zhang ◽  
Xiu-Yun Su ◽  
Jing-Xin Zhao ◽  
Jian-Tao Li ◽  
Li-Cheng Zhang ◽  
...  
Keyword(s):  
Femoral Neck ◽  
Torsion Angle ◽  
Morphological Analysis ◽  
Three Dimensional ◽  
Anatomical Study ◽  
Neck Torsion

scholarly journals Three-Dimensional Morphological Analysis of the Femoral Neck Torsion Angle - An Anatomical Study

2020 ◽  
Author(s):  
Ru-yi Zhang ◽  
Xiu-yun Su ◽  
Jing-xin Zhao ◽  
Jian-tao Li ◽  
Li-cheng Zhang ◽  
...  
Keyword(s):  
Femoral Neck ◽  
Cross Section ◽  
Proximal Femur ◽  
Torsion Angle ◽  
Measurement Method ◽  
Three Dimensional ◽  
Coronal Plane ◽  
Femoral Neck Axis ◽  
Significant Difference ◽  
Neck Torsion

Abstract Background: The femoral neck torsion angle (FNTA) is an important but often neglected parameter in assessments of the anatomical morphology of the femoral neck, which is often confused with the femoral neck anteversion angle (FNAA) in the current literature. Currently, the measurement methods reported in the literature all adopt the naked eye or two-dimensional (2D) visualization method, and the measurement parameters and details are not clearly defined. The objection of this research was to provide a reliable 3D method for determining the femoral neck axis, to improve the measurement method of the FNTA, and to analyze the anatomical and clinical significance of the results.Methods: Computed tomography (CT) data of 200 patients who received a lower extremity CT angiography examination were selected, and the bilateral femurs were reconstructed with three dimensional CT (3D CT). First, the 3D axis of the femoral neck was built. Second, the long axis of the cross section the femoral neck isthmus (FNI) and femoral neck basilar part (FNB) were confirmed by the “inertia axes” method, and the plane consisting of the long axis of the cross-section and the center of the femoral head was defined as the long axial plane. Third, the coronal plane of the proximal femur was determined through the long axis of the proximal femur and the femoral coronal. Finally, the FNTAs (the angles between the long axial planes and the coronal plane of the proximal femur) of FNI and FNB were measured. The size of FNTA was compared between the sexes and sides and different locations, the correlation between the parameters and age, height and weight were evaluated.Results: The difference in FNTA was statistically significant between the isthmus and the basilar part (isthmus 30.58 ± 8.90° vs. basilar part 23.79 ± 3.98°; p < 0.01). Significant difference in the FNTA was observed between the sexes (males 31.99 ± 9.25° vs. females 27.49 ± 7.19°; p < 0.01). The increase in FNTA from the basilar part to the isthmus was 6.79 ± 8.06°, and the male (7.87 ± 8.57°) was greater than the female (4.44 ± 6.23°, p < 0.01). However, no significant difference in the values was observed between sides. Height exerted the greatest effect on the FNTA according to the correlation analysis (r = 0.255, p＜0.001). Conclusions: This study found a reliable 3D method for the determination of the femoral neck axis improved the measurement method of the FNTA and made it more accurate and repeatable. The results provided a methodological basis and theoretical support for the research and development of internal fixation device for femoral neck fracture and the spatial configuration of implants in treatment. And, the optimal opening point of the femoral medullary cavity was recommended to locate at the posterior position of the top of the femoral neck cross-section during hip replacement.

Measuring femoral neck torsion angle using femoral neck oblique axial computed tomography reconstruction

2015 ◽  
Vol 40 (2) ◽  
pp. 371-376 ◽  
Author(s):  
Yingchao Yin ◽  
Liping Zhang ◽  
Zhiyong Hou ◽  
Zongyou Yang ◽  
Ruipeng Zhang ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Femoral Neck ◽  
Torsion Angle ◽  
Tomography Reconstruction ◽  
Computed Tomography Reconstruction ◽  
Neck Torsion

Femoral Neck Torsion Angle Measurement by Computed Tomography

1987 ◽  
Vol 11 (5) ◽  
pp. 799-803 ◽  
Author(s):  
Mamed Mesgarzadeh ◽  
George Revesz ◽  
Akbar Bonakdarpour
Keyword(s):  
Computed Tomography ◽  
Femoral Neck ◽  
Torsion Angle ◽  
Angle Measurement ◽  
Neck Torsion

Application of three-dimensional-printed navigation template in pediatric femoral neck fracture

2016 ◽  
Vol 2 (3) ◽  
pp. 113 ◽  
Author(s):  
Liming Wang ◽  
Yue Lou ◽  
Pengfei Zheng ◽  
Qingqiang Yao ◽  
Peng Xu ◽  
...  
Keyword(s):  
Femoral Neck ◽  
Femoral Neck Fracture ◽  
Three Dimensional ◽  
Neck Fracture ◽  
Navigation Template

scholarly journals Determination of Femoral Neck Angle and Torsion Angle Utilizing a Novel Three-Dimensional Modeling and Analytical Technology Based on CT Datasets

PLoS ONE ◽  
2016 ◽  
Vol 11 (3) ◽  
pp. e0149480 ◽  
Author(s):  
Maximilian J. Hartel ◽  
Andreas Petersik ◽  
Anne Schmidt ◽  
Daniel Kendoff ◽  
Jakob Nüchtern ◽  
...  
Keyword(s):  
Femoral Neck ◽  
Torsion Angle ◽  
Three Dimensional ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Femoral Neck Angle ◽  
Analytical Technology

Long-term survival of femoral neck fracture patients age over ninety: Arthroplasty compare with conservative treatment

2020 ◽  
Author(s):  
Yang Liu ◽  
Chong-wei Zhang ◽  
Xiao-dan Zhao
Keyword(s):  
Treatment Group ◽  
Conservative Treatment ◽  
Femoral Neck ◽  
Femoral Neck Fracture ◽  
Term Survival ◽  
Long Term Survival ◽  
Time Points ◽  
Neck Fracture ◽  
The Difference

Abstract Background The aging of the China population is expected to lead to increasing of nonagenarian and centenarian.The mortality rates of nonagenarian hip fracture patients would return to an equivalent mortality risk to the normal population at five years after injury. It is imperative to evaluate the 5-year mortality for this small but very challenging subgroup patients in order to optimize patient management. The main purpose of the current retrospective study was to compare the five-year survival between arthroplasty treatment and conservative treatment of femoral neck fracture patients age over 90 years during the same 16 -year period.Methods From January 1998 to December 2014, all consecutive nonagenarian and centenarian patients with femoral neck fracture admitted to our hospital were included for evaluation. The primary outcome was defined as thirty-day mortality, 1-year, 3-year, and 5-year mortality after injury. Survival status analysis was performed by the Kaplan–Meier method for mortality. Using the log-rank test, the stratified analyses were performed to compare the difference of overall cumulative mortality and three-time points (1-year, 3-year, and 5-year) mortality after injury were performed to compare the difference of survival distributions.Results Over the 16-year study period, the arthroplasty group and the conservative treatment group included 33 and 53 patients, respectively. The long-term survival probability of the arthroplasty group is significantly higher than the conservative treatment group( p=0.002277). The survival time of the arthroplasty group is significantly higher than the conservative treatment group(Median(P75-P25)=53(59) versus Median(P75-P25)=22(52), p=0.001). The difference of five time points (1-year, 2-year, 3-year, 4-year, and 5-year) mortality between the conservative group and arthroplasty group is significant except for 30-day mortality.The stratified analyses of overall cumulative mortality and three-time points (1-year, 3-year, and 5-year) mortality after injury demonstrated that the arthroplasty group is significant higher than the conservative treatment group.Conclusions Our study demonstrate that, compared with conservative treatment, arthroplasty surgery is more likely to improve the long-term survival of femoral neck fracture patients over 90s. What can be expected is that nearly half of patients will survive more than five years after surgery.

scholarly journals Relationship of femoral offset and clinical outcomes of femoral neck fracture patients following bipolar hip arthroplasty

2020 ◽  
Author(s):  
Sung Soo Kim ◽  
Hyeon Jun Kim ◽  
Seung Yup Lee
Keyword(s):  
Femoral Neck ◽  
Femoral Neck Fracture ◽  
Clinical Outcomes ◽  
Correlation Coefficient ◽  
Pearson Correlation ◽  
Neck Fracture ◽  
History Of ◽  
The Mean ◽  
The Difference

Abstract PurposeThis study aimed to investigate the relationship between femoral offset(FO) and clinical outcomes of patients with femoral neck fracture following bipolar hip arthroplasty(BHA). Materials and MethodsThis study recruited 520 patients who underwent BHA for femoral neck fracture from December 2003 to September 2018 with a minimum follow-up of one year. Excluding those with unclear medical records, a previous surgical history on the affected or contralateral hip, a congenital deformity and preoperative trauma history of the hip, high-energy multiple trauma, a history of neurodegenerative disease or cerebrovascular disease, a total of 77 patients were included in the analysis. The subjects were 54 females and 23 males. The mean age of patients was 74.6(65-95) years old and the mean follow-up period was 30.5 (12-136) months. For clinical assessment, postoperative pain visual analogue scale(VAS) and Harris hip score (HHS) were analyzed at each follow-up period. For radiological assessment, the difference in leg length discrepancy (LLD) and FO was measured. FO nearest to the real value was calculated using the values corrected for magnification and rotation errors on the anteroposterior view of plain radiographs taken at the first year of follow-up. In statistical analyses, the statistical significance between FO and clinical outcomes was analyzed using the Pearson correlation tests with SPSS v. 25.0. A value of p < 0.05 was considered statistically significant.ResultsThe difference in mean FO postoperatively was 6.7(±4.8) mm, and the difference in mean postoperative LLD was 4.9 (±3.4). The mean HHS was 77.1(±7.7), 82.3(±8.6), 83.4(±7.7), and 86.4(±6.7) at 1st , 3rd , 6th and 12th postoperative months, respectively. In the analysis using the Pearson correlation coefficient, the correlation coefficient between FO and HHS in 1-year follow-up was -0.38, and a significant outcome was found (p=0.001). Of HHS domain, the correlation coefficient for function in 1-year follow-up was -0.42, revealing a significant outcome (p=0.0001).ConclusionThere was a stastically significant correlation between clinical oucomes and FO difference at 1 year after BHA in patients with femoral neck fractures older than 65 years.

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