scholarly journals Central Femoral Head Chondromalacia Is Associated with a Diagnosis of Hip Instability

2021 ◽  
Author(s):  
W. Michael Pullen ◽  
Daniel M. Curtis ◽  
Marc R. Safran
Keyword(s):  
Femoral Head ◽  
Hip Instability

Developmental dysplasia of the hip

2011 ◽  
Author(s):  
Anish Sanghrajka ◽  
Deborah M Eastwood
Keyword(s):  
Femoral Head ◽  
Early Diagnosis ◽  
Surgical Approach ◽  
Developmental Dysplasia ◽  
Ultrasound Screening ◽  
Hip Instability ◽  
Appropriate Treatment ◽  
Aggressive Surgical Approach ◽  
Dysplasia Of The Hip ◽  
All Treatment

♦ Developmental dysplasia of the hip represents a spectrum of hip pathology with or without hip instability♦ Controversy continues regarding the relative roles of clinical and ultrasound screening programmes♦ Early diagnosis and prompt, appropriate treatment is important♦ All treatment methods risk compromising the vascularity of the developing femoral head♦ Residual dysplasia may require an aggressive surgical approach.

Dynamic ultrasonography of the infant hip with suspected instability

1997 ◽  
Vol 38 (2) ◽  
pp. 206-209
Author(s):  
T. Finnbogason ◽  
H. Jorulf
Keyword(s):  
Femoral Head ◽  
Young Children ◽  
Clinical Examination ◽  
Stress Testing ◽  
Stress Test ◽  
Sensitive Test ◽  
Hip Instability ◽  
Very Young Children ◽  
Dynamic Ultrasound ◽  
Infants And Young Children

Purpose: the combining of clinical examination of the infant hip with dynamic ultrasound (US) into one examination, performed by one examiner, should result in a sensitive test for hip instability. in this study a new method of dynamic US examination of the hip in newborn and very young children, that combined US with stress testing (Barlow method) was tested. Material and Methods: A specially designed examination table, with a US probeholder, enabled the radiologist to perform a stress test of the hip according to Barlow(using both hands), and simultaneously monitor it on US. Fifty-seven infants and young children were examined by this method, and compared with the Graf'method and clinical stress test. Results: Our method allowed clear visualisation of the movement of the femoral head during the stress test, and was performed easily in patients under 3–4 months of age. Conclusion: the described method is easily adapted for one examiner with experience in US and in the clinical examination of the infant hip.

scholarly journals Anteroinferior Hip Instability in Flexion During Dynamic Arthroscopic Examination Is Associated With Abnormal Anterior Acetabular Horn

2020 ◽  
Vol 8 (12) ◽  
pp. 232596712096556
Author(s):  
Munif A. Hatem ◽  
Asadullah Helal ◽  
Anthony N. Khoury ◽  
Hal David Martin
Keyword(s):  
Femoral Head ◽  
Predictive Value ◽  
Control Group ◽  
Acetabular Version ◽  
Hip Instability ◽  
Center Edge ◽  
Arthroscopic Examination ◽  
Sector Angle ◽  
Lateral Center Edge Angle ◽  
Center Edge Angle

Background: The stabilization of the femoral head is provided by the distal acetabulum when the hip is in a flexed position. However, the osseous parameters for the diagnosis of hip instability in flexion are not defined. Purpose/Hypothesis: To determine whether the osseous parameters of the distal acetabulum are different in hips demonstrating anteroinferior subluxation in flexion under dynamic arthroscopic examination, compared with individuals without hip symptoms. The hypothesis was that the morphometric parameters of the anterior acetabular horn are distinct in hips with anteroinferior instability compared with asymptomatic hips. Study Design: Case-control study; Level of evidence, 3. Methods: A total of 30 hips with anteroinferior instability in flexion under dynamic arthroscopic examination were identified. A control group of 60 hips (30 patients), matched by age and sex, was formed from individuals who had undergone pelvis magnetic resonance imaging (MRI) for nonorthopaedic reasons. Unstable and control hips were compared according to the following parameters assessed on axial MRI scans of the pelvis: anterior sector angle (ASA), anterior horn angle (AHA), posterior sector angle (PSA), posterior horn angle (PHA), acetabular version, lateral center-edge angle, acetabular inclination (Tönnis angle), and femoral head diameter. Results: The coverage of the femoral head by the anterior acetabular horn was decreased in unstable hips compared with the control group (mean ASA, 54.8° vs 61°, respectively; P < .001). Unstable hips also had a steeper anterior acetabular horn, with an increased mean AHA compared with controls (52.5° vs 46.8°, respectively; P < .001). An ASA <58° had a sensitivity of 0.8, a specificity of 0.68, a negative predictive value of 0.87, and a positive predictive value of 0.56 for anteroinferior hip instability. An AHA >50° had a sensitivity of 0.77, a specificity of 0.72, a negative predictive value of 0.86, and a positive predictive value of 0.57 for anteroinferior hip instability. There was no statistically significant difference in the mean PSA, PHA, acetabular version, lateral center-edge angle, acetabular inclination, or femoral head diameter between unstable hips and controls. Conclusion: Abnormal morphology of the anterior acetabular horn is associated with anteroinferior instability in hip flexion. The ASA and AHA can aid in the diagnosis of hip instability.

scholarly journals Radiological Evaluation of Hip in Cerebral Palsy: A Randomized Cross-sectional Study

2017 ◽  
Vol 28 (3) ◽  
pp. 95-99 ◽  
Author(s):  
Sakti Prasad Das ◽  
Pabitrakumar Sahoo ◽  
Mamata M Sahu ◽  
Tajuddin Chitapure
Keyword(s):  
Cerebral Palsy ◽  
Femoral Head ◽  
Cross Sectional Study ◽  
Radiological Evaluation ◽  
Sectional Study ◽  
Cross Sectional ◽  
Hip Instability ◽  
Acetabular Angle ◽  
Migration Percentage ◽  
Grade Iii

ABSTRACT Introduction The incidence of hip abnormalities in cerebral palsy (CP) patients has been reported as low as 2.6% and as high as 28%. Hip displacement is the second most common deformity after equines. The objective of this study is to evaluate the radiological changes of hip in CP for detecting early features of hip instability. Materials and methods A total of 91 hips of 52 patients with CP who attended for rehabilitation management were randomly selected for the study. Hip surveillance was done in those cases where the clinical evaluation alone could not access stability. All the selected cases were evaluated radiologically with respect to acetabular angle, neck-shaft angles, degree of subluxation (migration percentage) and shape of femoral head. Results 38 hips showed grade I, 14 hips grade II, 6 hips grade III, and 2 hips grade IV stage of migration percentage. Flattening of femoral head was laterally seen in 16 cases, both medial and lateral flattening was seen in 8 cases of subluxated hip. Acetabular roof angle was increased in cases with grade III and IV migration percentage. Acetabular angle was within 12 to 75° with mean angle of 32°. The mean true neck-shaft angle was 145.5° ranging from 134° to 170° Conclusion Early detection of hip instability in Cerebral Palsy helps in timely intervention and that reduces or delays need for reconstructive surgery. How to cite this article Sahoo PK, Sahu MM, Chitapure T, Das SP. Radiological Evaluation of Hip in Cerebral Palsy: A Randomized Cross-sectional Study. Indian J Phy Med Rehab 2017;28(3):95-99.

Hill-Sachs type lesion of the femoral head in a case of hip instability

2000 ◽  
Vol 16 (8) ◽  
pp. 858-859 ◽  
Author(s):  
Richard N. Villar ◽  
Amir M. Sheikh ◽  
Arvind Arora
Keyword(s):  
Femoral Head ◽  
Hip Instability

scholarly journals Traumatic posterior hip instability and reconstruction with a femoral head allograft in a young man

2018 ◽  
Vol 1 ◽  
pp. 1
Author(s):  
Mehmet Arican ◽  
Zekeriya Okan Karaduman ◽  
Ozan Turhal ◽  
Cemal Güler ◽  
Yunus Emre Bulum
Keyword(s):  
Femoral Head ◽  
Hip Instability

scholarly journals A novel model for the induction of postnatal murine hip deformity

2018 ◽  
Author(s):  
Megan L. Killian ◽  
Penny R. Atkins ◽  
Ryan C. Locke ◽  
Michael G. James ◽  
Andrew E. Anderson ◽  
...  
Keyword(s):  
Femoral Head ◽  
Acetabular Dysplasia ◽  
Morphological Changes ◽  
Critical Time ◽  
Hip Osteoarthritis ◽  
Acetabular Coverage ◽  
Loss Of Function ◽  
Post Injury ◽  
Hip Instability ◽  
Functional Changes

AbstractAcetabular dysplasia is a recognized cause of hip osteoarthritis (OA). A paucity of animal models exists to investigate structural and functional changes that mediate morphology of the dysplastic hip and drive the subsequent arthritic cascade. Utilizing a novel murine model, this study investigated the role of surgically-induced unilateral instability of the postnatal hip on the initiation and progression of acetabular dysplasia and impingement up to 8-weeks post-injury. Specifically, C57BL6 mice were used to develop titrated levels of hip instability (mild, moderate, severe, and femoral head removal) at 3-weeks of age, a critical time for hip maturation. Joint shape, acetabular coverage, histomorphology, immunohistochemistry, and statistical shape modeling were used to assess overall quality of joint health and three-dimensional hip shape following 8 weeks of titrated destabilization. This titrated approach included mild, moderate, severe, and complete instability via surgical destabilization of the murine hip. Acetabular coverage was reduced following severe, but not moderate, instability. Moderate instability induced lateralization of the femoral head without dislocation, whereas severe instability led to complete dislocation and formation of pseudoacetabula. Mild instability did not result in statistically significant morphological changes to the hip. Complete destabilization via femoral head removal led to reduced joint space volume and reduced bone volume ratio in the remnant proximal femur. Collectively, these results support the notion that hip instability, driven by loss of function, leads to morphometric changes in the maturing mouse hip. This model could be useful for future studies investigating the mechanical and cellular adaptations to hip instability during maturation.

scholarly journals Traumatic Hip Dislocation with Associated Femoral Head Fracture

2015 ◽  
Vol 2015 ◽  
pp. 1-3 ◽  
Author(s):  
H. Dortaj ◽  
A. Emamifar
Keyword(s):  
Femoral Head ◽  
Full Range ◽  
Hip Dislocation ◽  
High Energy ◽  
Femoral Head Fracture ◽  
Hip Instability ◽  
The Right ◽  
Dislocation Of The Hip ◽  
Critical Injury

Dislocation of the hip is a critical injury that results from high-energy trauma. This paper describes a case of posterior dislocation of the right hip in a 35-year-old woman with associated ipsilateral femoral head fracture. Initial treatment included reduction of the right hip through posterior approach and fixation of the femoral head fracture with three absorbable screws. After 15-month follow-up, a full range of motion has been achieved and there are no signs of avascular necrosis, hip instability, or limping. The authors describe their method of surgery.

scholarly journals Dual mobility total hip arthroplasty: should everyone get one?

2019 ◽  
Vol 4 (9) ◽  
pp. 541-547 ◽  
Author(s):  
William G. Blakeney ◽  
Jean-Alain Epinette ◽  
Pascal-André Vendittoli
Keyword(s):  
Femoral Head ◽  
Total Hip Arthroplasty ◽  
Patient Selection ◽  
Hip Arthroplasty ◽  
Revision Surgery ◽  
Polyethylene Liner ◽  
Fixed Bearing ◽  
Hip Instability ◽  
Dual Mobility ◽  
Total Hip

Hip instability following total hip arthroplasty (THA) remains a major challenge and is one of the main causes of revision surgery. Dual mobility (DM) implants have been introduced to try to overcome this problem. The DM design consists of a small femoral head captive and mobile within a polyethylene liner. Numerous studies have shown that DM implants reduce the rate of dislocation compared to fixed-bearing inserts. Early designs for DM implants had problems with wear and intra-prosthetic dislocations, so their use was restricted to limited indications. The results of the latest generation of DM prostheses demonstrate that these problems have been overcome. Given the results of these studies presented in this review, surgeons may now consider DM THA for a wider patient selection. Cite this article: EFORT Open Rev 2019;4:541-547. DOI: 10.1302/2058-5241.4.180045

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