Simple Mathematical Relations between the Acetabular Anteversion and Sector Angles

1993 ◽  
Vol 34 (1) ◽  
pp. 99-100
Author(s):  
S. Anda ◽  
I. K. Amdal
Keyword(s):  
Femoral Head ◽  
Hip Joint ◽  
Acetabular Anteversion ◽  
Mathematical Relationships ◽  
Mathematical Relations

Acetabular anteversion is an important parameter of the hip joint. It is measured at CT of the hip, as are the more recently introduced acetabular sector angles. These angles give information on the anterior and posterior support from the acetabulum to the femoral head. Some simple mathematical relationships between these angles are presented.

Optimal parameters of abrasive flow finishing for hip joint implants

2021 ◽  
pp. 095440542199561
Author(s):  
Yahya Choopani ◽  
Mohsen Khajehzadeh ◽  
Mohammad Reza Razfar
Keyword(s):  
Surface Roughness ◽  
Standard Deviation ◽  
Femoral Head ◽  
Hip Joint ◽  
Spherical Shape ◽  
Shape Deviation ◽  
Head Surface ◽  
Joint Implants ◽  
Finishing Processes ◽  
Abrasive Flow Finishing

Total hip arthroplasty (THA) is one of the most well-known orthopedic surgeries in the world which involves the substitution of the natural hip joint by prostheses. In this process, the surface roughness of the femoral head plays a pivotal role in the performance of hip joint implants. In this regard, the nano-finishing of the femoral head of the hip joint implants to achieve a uniform surface roughness with the lowest standard deviation is a major challenge in the conventional and advanced finishing processes. In the present study, the inverse replica fixture technique was used for automatic finishing in the abrasive flow finishing (AFF) process. For this aim, an experimental setup of the AFF process was designed and fabricated. After the tests, experimental data were modeled and optimized to achieve the minimum surface roughness in the ASTM F138 (SS 316L) femoral head of the hip joint through the use of response surface methodology (RSM). The results confirmed uniform surface roughness up to the range of 0.0203 µm with a minimum standard deviation of 0.00224 for the femoral head. Moreover, the spherical shape deviation of the femoral head was achieved in the range of 7 µm. The RSM results showed a 99.71% improvement in the femoral head surface roughness (0.0007) µm under the optimized condition involving the extrusion pressure of 9.10 MPa, the number of finishing cycles of 95, and SiC abrasive mesh number of 1000.

scholarly journals Microvascular Density of Rapidly Destructive Arthropathy of the Hip Joint

2005 ◽  
Vol 13 (1) ◽  
pp. 40-45 ◽  
Author(s):  
T Yamakawa ◽  
A Sudo ◽  
M Tanaka ◽  
A Uchida
Keyword(s):  
Femoral Head ◽  
Hip Joint ◽  
Joint Destruction ◽  
Bone Destruction ◽  
Microvascular Density ◽  
Blood Capillaries ◽  
Secondary Osteoarthritis ◽  
Femoral Heads ◽  
Formalin Fixed Paraffin Embedded ◽  
Destructive Arthropathy

Purpose. To assess the vascularity of the femoral head and determine how it is related to the destruction of the arthritic hip joint. The process of destructive arthropathy in arthritic hip joints is variable. Some patients with osteoarthritis of the hip have rapidly progressive destructive changes resulting in the disappearance of the femoral head. Method. Six femoral heads from patients diagnosed with rapidly destructive arthropathy and 6 femoral heads from patients with secondary osteoarthritis caused by acetabular dysplasia were analysed to reveal the association between blood capillaries and osteoclasts. The von Willebrand Factor immunostaining and counterstaining with Mayer's haematoxylin were used to label the microvessels and osteoclasts in formalin-fixed, paraffin-embedded specimens of femoral heads. The numbers of immunostained microvessels and osteoclasts in selected regions were counted. Result. The microvascular density of the bone surfaces of rapidly progressive arthritic hips was hypervascular. Osteoclasts were also found in increased numbers on the bone surfaces of rapidly progressive arthritic hips. The higher microvascular density coincided with extensive bone destruction and with the increased osteoclast count. Conclusion. These findings suggested that hypervascularity of the granulation in the femoral head may be associated with bone and joint destruction.

A method for visualizing the dorsal acetabular rim and the coverage of the femoral head

2001 ◽  
Vol 14 (03) ◽  
pp. 151-155 ◽  
Author(s):  
J. Hoskinson ◽  
W. C. Renberg
Keyword(s):  
Femoral Head ◽  
Hip Joint ◽  
Prognostic Value ◽  
Degenerative Change ◽  
Femoral Shaft ◽  
Normal Activity ◽  
Degenerative Joint Disease ◽  
Joint Disease ◽  
Anatomical Landmarks ◽  
Acetabular Rim

SummaryThe authors describe a new technique to visualize the dorsal acetabular rim and the coverage of the femoral head in the nonsedated dog. The technique involves using an overhead beam, directed at an angle tangential to the dorsal rim of the acetabulum, with a film positioned caudal to the standing dog. Anatomical landmarks that can routinely be identified include: the ilial crest, ilial shaft, ischial tuberosity, acetabulum, acetabular rim (particularly the dorsocaudal component), femoral head, greater trochanter, femoral neck, femoral shaft, rectum and the tail. Because the animal is standing and is not sedated, the technique may have additional value as a means of evaluating subluxation of the hip joint. It maintains a posture as close as possible to that experienced by the animal in normal activity. If the technique has prognostic value in that regard, more investigation is needed, but it is useful in itself as a technique to visualize the area of the acetabulum.A new radiographic technique to evaluate the canine hip joint is described. The view involves tangential projection of the acetabulum in the standing, awake dog. Nineteen dogs have been radiographed to develop the technique and the method has been found to be technically simple and consistent. It allows examination of the dorsal acetabular rim and may help examine the amount of subluxation of the hip as well as the presence of any degenerative joint disease. The authors advocate additional study to determine the technique’s prognostic value in predicting degenerative change associated with hip dysplasia.

scholarly journals Pathohistologic Changes in Hip Tissues and Clinical-Morphologic Correlations in Diseases Complicated by Femoroacetabular Impingement Syndrome

2014 ◽  
Vol 21 (2) ◽  
pp. 67-73
Author(s):  
V. V Grigorovskiy ◽  
V. V Filipchuk ◽  
M. S Kabatsiy
Keyword(s):  
Femoral Head ◽  
Femoroacetabular Impingement ◽  
Hip Joint ◽  
Comparison Study ◽  
Acetabular Labrum ◽  
Aseptic Necrosis ◽  
Association Coefficient ◽  
Absolute Value ◽  
Femoroacetabular Impingement Syndrome ◽  
Fai Syndrome

The purpose of the work was to detect clinical-morphologic correlative dependences in patients with clinically marked femoroacetabular impingement (FAI) syndrome basing on the study of pathomorphologic changes in hip joint tissues, semiquantitative quantification of pathologic changes intensity, frequency analysis of their occurrence in nosologic groups of comparison. Study was performed on specimens of hip joint tissues - femoral head, acetabulum, acetabular labrum and joint capsule, resected during indicated corrective surgeries for femoral head aseptic necrosis and juvenile epiphysiolysis. Clinical-morphologic study revealed various pathologic changes: dystrophic-destructive, ischemic-necrotic and productive-inflammatory. In patients with FAI syndrome clinical and morphologic correlative dependences varied by absolute value, sign and degree of reliability of association coefficient parameters, i.e. groups of patients with certain nosologic units retained the peculiarities of rate and characteristics proportions in correlative dependences

scholarly journals Algorithm for Early Diagnosis and Treatment Tactics of Diseases Accompanied by Coxalgia in Children

2009 ◽  
Vol 16 (2) ◽  
pp. 67-71
Author(s):  
Il'ya L'vovich Lobov ◽  
S E Kul'banskaya ◽  
M A Uronova ◽  
I L Lobov ◽  
S E Kulbanskaya ◽  
...  
Keyword(s):  
Drug Therapy ◽  
Femoral Head ◽  
Early Diagnosis ◽  
Hip Joint ◽  
Blood Circulation ◽  
Perthes Disease ◽  
Diagnosis And Treatment ◽  
Joint Diseases

Examination and treatment of 524 children with coxalgia has been performed. Algorithm for early diagnosis of various hip joint diseases accompanied by coxalgia has been elaborated. The factors causing hip joint response resulting in different pathology including Leg-Calve-Perthes disease have been determined. In the majority of cases application of modified splint in combination with drug therapy enabled to normalize blood circulation in the affected joint and prevent the development of secondary deformities of the femoral head.

scholarly journals Risk forecasting of the femoral head dislocation and its prophylaxis at total hip joint replacement

2018 ◽  
Vol 0 (1) ◽  
pp. 79-85
Author(s):  
Volodymyr Filipenko ◽  
Vera Kolesnichenko ◽  
Volodymyr Mezentsev ◽  
Oleh Ovchynnikov
Keyword(s):  
Femoral Head ◽  
Hip Joint ◽  
Joint Replacement ◽  
Hip Joint Replacement ◽  
Total Hip ◽  
Risk Forecasting

Normal radiological unossified hip joint space and femoral head size development during growth in 675 children and adolescents

2016 ◽  
Vol 30 (2) ◽  
pp. 267-275 ◽  
Author(s):  
Veronika Wegener ◽  
Gabriele Jorysz ◽  
Andreas Arnoldi ◽  
Sandra Utzschneider ◽  
Bernd Wegener ◽  
...  
Keyword(s):  
Femoral Head ◽  
Children And Adolescents ◽  
Hip Joint ◽  
Joint Space ◽  
Head Size ◽  
Femoral Head Size

scholarly journals Automatic Cartilage Segmentation for Delayed Gadolinium-Enhanced Magnetic Resonance Imaging of Hip Joint Cartilage: A Feasibility Study

Cartilage ◽  
2018 ◽  
Vol 11 (1) ◽  
pp. 32-37 ◽  
Author(s):  
Tobias Hesper ◽  
Bernd Bittersohl ◽  
Christoph Schleich ◽  
Harish Hosalkar ◽  
Rüdiger Krauspe ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Femoral Head ◽  
Hip Joint ◽  
Rank Correlation ◽  
Joint Cartilage ◽  
Resonance Imaging ◽  
Femoral Head Cartilage ◽  
Processing Software ◽  
Joint Assessment

Objective Automatic segmentation for biochemical cartilage evaluation holds promise for an efficient and reader-independent analysis. This pilot study aims to investigate the feasibility and to compare delayed gadolinium-enhanced magnetic resonance imaging of cartilage (dGEMRIC) hip joint assessment with manual segmentation of acetabular and femoral head cartilage and dGEMRIC hip joint assessment using automatic surface and volume processing software at 3 Tesla. Design Three-dimensional (3D) dGEMRIC data sets of 6 patients with hip-related pathology were assessed (1) manually including multiplanar image reformatting and regions of interest (ROI) analysis and (2) automated by using a combined surface and volume processing software. For both techniques, T1Gd values were obtained in acetabular and femoral head cartilage at 7 regions (anterior, anterior-superior, superior-anterior, superior, superior-posterior, posterior-superior, and posterior) in central and peripheral portions. Correlation between both techniques was calculated utilizing Spearman’s rank correlation coefficient. Results A high correlation between both techniques was observed for acetabular (ρ = 0.897; P < 0.001) and femoral head (ρ = 0.894; P < 0.001) cartilage in all analyzed regions of the hip joint (ρ between 0.755 and 0.955; P < 0.001). Conclusions Automatic cartilage segmentation with dGEMRIC assessment for hip joint cartilage evaluation seems feasible providing high to excellent correlation with manually performed ROI analysis. This technique is feasible for an objective, reader-independant and reliable assessment of biochemical cartilage status.

Relationship of peroxidation indicators and hemograms in children with hip joint pathology

2021 ◽  
Vol 66 (2) ◽  
pp. 104-109
Author(s):  
M. P. Teplen’kiy ◽  
E. L. Matveeva ◽  
E. S. Spirkina ◽  
A. G. Gasanova
Keyword(s):  
Lipid Peroxidation ◽  
Femoral Head ◽  
Hip Joint ◽  
Hip Dysplasia ◽  
Stage Ii ◽  
Perthes Disease ◽  
Antioxidant Protection ◽  
Aseptic Necrosis ◽  
Joint Pathology ◽  
Group I

The increase in the number of patients with hip pathologies among children of different ages makes the diagnosis and treatment of these diseases one of the most actually existing problems in modern orthopedics. The aim of the work was to determine the features of the lipid peroxidation system - antioxidant protection and hemogram indices in children with various forms of hip joint pathology. The results of a preoperative examination of 47 patients aged 6-15 years (average age 10.3 years) who were treated at the clinic “FSBI NICC“ TO ”named after academician G. A. Ilizarova, Ministry of Health of the Russian Federation. There were 25 boys and 20 girls. Given nosology, patients were divided into five groups. The diagnosis was established on the basis of a clinical and radiological examination. Group I consisted of 8 male patients with stage II Perthes disease (mean age 8.75 + 1.63). Group II includes 16 patients (8 boys, 7 girls) with stage III Perthes disease. (average age 11.80 + 0.89). Group III included 12 patients (6 boys, 6 girls) with aseptic necrosis of the femoral head (average age 14.7 + 2.35). Group IV consisted of 4 patients (1 boy, 3 girls) with epiphyseal dysplasia. (average age 10.25 + 1.36). Group V includes 7 patients with hip dysplasia complicated by aseptic necrosis of the femoral head (mean age 8.33 + 2.11). The norm is the data that was obtained after examining 10 healthy male adolescents (age 13-14) and 5 female adolescents (age 8-14 years). Changes in lipid peroxidation rates and antioxidant activity are unidirectional in different forms of pathology of the hip joints in children, and the content of peroxidation products reliably correlates with hemogram values in stage II osteochondropathy and complicated hip dysplasia. In the complex of diagnostic measures for children with dystrophic lesions of the hip joint, to clarify the nature and stage of the pathological process, as additional criteria, hemogram indicators and lipid peroxidation systems - antioxidant protection can be used.

Sign in / Sign up

Export Citation Format

Share Document