Contribution to the method for determining femoral neck axis

Andjelkovic, Zoran; Mladenovic, Desimir; Vukašinović, Zoran; Arsić, Stojanka; Mitković, Milorad; Micić, Ivan; Mladenović, Marko Z.

doi:10.2298/sarh1404178a

Cited by 5 publications

(7 citation statements)

References 27 publications

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“…It is possible that the model could be improved by making the feature detection algorithm capable of identifying random bone spurs and other irregularities. Additionally, each of our landmark identifications made use of 3D definitions, as it is expected that they will be more accurately representative of the anatomy than the standard radiograph‐based 2D definitions . Morphologic measures of our study population indicate that the subjects well represented characteristics of the population at large which is important for applicability of the linear model.…”

Section: Discussionmentioning

confidence: 99%

Automated femoral version estimation without the distal femur

Veilleux

Kalore

Wegelin

et al. 2018

Journal Orthopaedic Research

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Femoral version impacts the long-term functioning of the femoroacetabular joint. Accurate measurements of version are thus required for success in total hip arthroplasties and hip reconstructive surgeries. These are impossible to obtain without visualization of the distal femur, which is often unavailable preoperatively as the majority of imaging scans are isolated to the pelvis and proximal femur. We developed an automated algorithm for identifying the major landmarks of the femur. These landmarks were then used to identify proximal axes and create a statistical shape model of the proximal femur across 144 asymptomatic femora. With six proximal axes selected, and 200 parameters (distances and angles between points) from the shape model measured, the best-fitting linear correlation was found. The difference between true version and version predicted by this model was 0.00 ± 5.13° with a maximum overestimation and underestimation of 11.80 and 15.35°, respectively. The mean absolute difference was 4.14°. This model and its prediction of femoral version are a substantial improvement over pre-operative 2D or intra-operative visual estimation measures. © 2018 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res.

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Section: Discussionmentioning

confidence: 99%

Automated femoral version estimation without the distal femur

Veilleux

Kalore

Wegelin

et al. 2018

Journal Orthopaedic Research

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“…The standardized anteroposterior (AP) was the fi rst one. Profi le Dunn Ripstein Mueller in 90 degrees of hip fl exion (DRM90) was the second [23][24][25][26]. We did preoperative X-rays.…”

Section: Methodsmentioning

confidence: 99%

“…When the axes l and p overlapped, the femoral head had an anatomical position. to measure femoral head translation [4,8,23,24,28]. We drew and measured offset indexes on both femoral neck axes.…”

Section: Methodsmentioning

confidence: 99%

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Gamma angle, a measurement tool of the femoral head angular translation in adults hips with cam or mix form of impingement femoroacetabulare

Andjelkovic¹,

Andjelkovic²,

Stojanovic³

2019

Open J Trauma

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Femoral head translation leads to the cam deformity development. It is formed on the femoral head-neck junction. Cam deformity produces femoroacetabular impingement. There are no particular techniques for femoral head translation assessment. The offset index is the most regularly applied. It quantifi es the relation between the femoral head and neck junction. We introduce the original method to test the femoral head translation.The purpose of this survey was to draw, measure and to test gamma angle rates. Tested groups were subjects with cam and mix form of femoroacetabular impingement. We compare gamma angle values with the offset index. Gamma angle role in femoral head angular inclination measurement, we considered. Material:We measured the gamma angle on the preoperative X-rays of the hips. 51 subjects with mixed and cam form of femoroacetabular impingement we analyzed. Standardized preoperative anteroposterior and profi le X-ryas we managed. Method:Two femoral neck axes we drew. The angle they made we named gamma angle. We assumed this angle measure femoral head angular inclination. Gamma angle higher than 3° was pathological. We calculated and tabulated data.The results: Gamma angles mean was 6,30° on the AP and 5,97° on the profi le X-rays. The gamma angle sensitivity of 90,32% was on AP X-rays. On the other X-rays, sensitivity was smaller: 60-85%. Specifi city, positive and negative predictive values were over 90%. We established a high negative correlation between the offset index and gamma angle values.Conclusion: Gamma angle measured the angular inclination of the femoral head on the hips X-rays. This angle might be an appropriate tool. One can apply this tool in people with the closed proximal femoral epiphysis.

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“…The anteroposterior (AP) X-ray images of the hips (Figure 1) showed the value of collocapital diaphyseal angles (CCD) at the healthy right hip of 135° and at the injured, left hip 149° that was in favour of healing the femoral neck in abduction, i.e., valgus position of 19° 25 . Tonnis angle 26 , had the value of 0° on both sides, the value of Wiberg angle 27 , on the right hip was 43°, and on the injured, left hip, it was 38°.…”

Section: Case Reportmentioning

confidence: 99%

Femoroacetabular impingement after the femoral neck fracture healed in a nonanatomical position

et al. 2019

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Introduction. Femoroacetabular impingement is the result of the pathological conditions in the osseous acetabulum and/or the proximal femur. One of its causes is a non-anatomically healed femoral neck fracture. Case report. A male, aged 51, with a subcapital left femoral neck fracture was treated conservatively. The fracture healed 9 months later and although the patient was walking on crutches he suffered from pain in the left groin. The X-ray images showed the valgus and the retroposition of the left femoral head. The patient was operated on and intraoperatively the thickness and a bone prominence in the anterosuperior femoral neck area in the line of the previous fracture were found, which was pressing and spreading beneath the acetabular labrum, thus squeezing the acetabular cartilage. The labrum lesion which was found was the result of the mechanical pressure of the existing femoral neck deformity during the hip movements. Irretrievably damaged part of the labrum was resected and the anterosuperior femoral headneck osteochondroplasty was done. One year after the surgery, the patient had no pain, he walked without limping, the impingement test was negative, the radiological parameters were adjusted and there were no signs of the avascular necrosis of the femoral head. Conclusion. The femoral neck fracture should be treated adequately with the full anatomical position and the proper internal fixation. If the deformity occurs as the result of a treatment, it should be removed as soon as possible to prevent the osteoarthritis of the hip.

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Contribution to the method for determining femoral neck axis

Cited by 5 publications

References 27 publications

Automated femoral version estimation without the distal femur

Automated femoral version estimation without the distal femur

Gamma angle, a measurement tool of the femoral head angular translation in adults hips with cam or mix form of impingement femoroacetabulare

Femoroacetabular impingement after the femoral neck fracture healed in a nonanatomical position

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