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Hip maturity

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https://www.readbyqxmd.com/read/27918658/countermovement-jump-phase-characteristics-of-senior-and-academy-rugby-league-players
#1
John J McMahon, Shannon Murphy, Sophie J E Rej, Paul Comfort
PURPOSE: Gross measures of countermovement jump (CMJ) performance are commonly used to track maturational changes in neuromuscular function within rugby league (RL). The purpose of this study was to conduct both a gross and a more detailed temporal phase analysis of the CMJ performances of senior and academy RL players, to provide greater insight into how neuromuscular function differs between these groups. METHODS: Twenty senior and fourteen academy (under-19) male RL players performed three maximal effort CMJs on a force platform with forward dynamics subsequently employed to allow gross performance measures and entire kinetic and kinematic-time curves to be compared between groups...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27883044/predicting-the-location-of-the-hip-joint-centres-impact-of-age-group-and-sex
#2
Reiko Hara, Jennifer McGinley, Chris Briggs, Richard Baker, Morgan Sangeux
Clinical gait analysis incorporating three-dimensional motion analysis plays a key role in planning surgical treatments in people with gait disability. The position of the Hip Joint Centre (HJC) within the pelvis is thus critical to ensure accurate data interpretation. The position of the HJC is determined from regression equations based on anthropometric measurements derived from relatively small datasets. Current equations do not take sex or age into account, even though pelvis shape is known to differ between sex, and gait analysis is performed in populations with wide range of age...
November 24, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27872768/hip-replacement-surgery-in-14-year-old-girl-with-factor-v-deficiency-haemostatic-treatment-and-thromboprophylaxis
#3
María Eva Mingot-Castellano, Josefina Pérez-Núñez, Lourdes Baeza-Montañez
Factor V (FV) is a pivotal coagulation factor present in plasma and platelets. It plays an essential role in secondary haemostasis acting as a cofactor in the prothrombinase complex, catalysing the conversion of prothrombin to thrombin. There is little evidence on the management of mayor orthopaedic surgery in paediatric or adolescents subjects with this coagulopathy and almost no information about thromboprophylaxis in these situations. We report a case of a hip replacement in a 14-year-old girl with moderate FV deficiency (0...
2016: Case Reports in Hematology
https://www.readbyqxmd.com/read/27866316/epidemiology-of-developmental-dysplasia-of-the-hip-within-the-uk-refining-the-risk-factors
#4
Timothy Woodacre, Thomas Ball, Peter Cox
PURPOSE: The epidemiology and risk factors for developmental dysplasia of the hip (DDH) are still being refined. We investigated the local epidemiology of DDH in order to define incidence, identify risk factors, and refine our policy on selective ultrasound screening. METHODS: With a cohort study design, data were prospectively recorded on all live births in our region from January 1998 to December 2008. We compared data on babies treated for DDH with data for all other children...
November 19, 2016: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/27834459/histological-changes-of-the-acetabular-labrum-in-coxarthrosis-labral-degeneration-and-repair
#5
Marcin E Domzalski, Marek Synder, Anna Karauda, Wielislaw Papierz
INTRODUCTION: The current study was designed to describe types of histological changes within the acetabular labrum in the advanced stages of coxarthrosis, in patients requiring total hip arthroplasty (THA). METHODS: 77 consecutive patients without systemic disorders or prior hip surgery, scheduled for THA with 3 types of coxarthrosis: avascular necrosis (AVN), idiopathic, and dysplastic coxarthrosis were analysed. Patient's data: age, gender, side of the involvement, duration of the symptoms were recorded, and standard anteroposterior (AP) radiographic views of the pelvis were obtained...
November 9, 2016: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/27828848/lateral-shelf-acetabuloplasty-for-severe-legg-calv%C3%A3-perthes-disease-in-patients-older-than-8-years-a-mean-eleven-year-follow-up
#6
Wen-Chao Li, Rui-Jiang Xu
The natural history of Legg-Calvé-Perthes disease (LCPD) in children older than 8 years is usually poor without treatment. The treatment goal is to prevent deformity and incongruity of the hip by achieving a stable spherical femoral head in a deep, congruent, sharp-edged acetabulum, with a good range of hip movement at skeletal maturity. Lateral shelf acetabuloplasty in LCPD can increase the coverage of the femoral head, benefiting the remodeling of the femoral head and acetabulum. The aim of this study was to evaluate the efficacy of lateral shelf acetabuloplasty for severe LCPD in patients older than 8 years...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27802891/reoperations-and-mortality-in-383-patients-operated-with-parallel-screws-for-garden-i-ii-femoral-neck-fractures-with-up-to-ten-years-follow-up
#7
Le Nhat Duc Do, Torbjørn Marstein Kruke, Olav A Foss, Trude Basso
INTRODUCTION: The objective of this study was to identify indications and predictors for subsequent surgeries in the same hip and to evaluate life expectancy following screw fixation of undisplaced femoral neck fractures (FNF). The study further aimed to determine the necessary follow-up time for future studies aiming to evaluate the treatment of such fractures. MATERIALS AND METHODS: This is a single-center retrospective cohort study with prospectively collected data including skeletally mature patients with undisplaced FNFs operated between 2005 and 2013...
December 2016: Injury
https://www.readbyqxmd.com/read/27764714/propulsion-strategy-in-the-gait-of-primary-school-children-the-effect-of-age-and-speed
#8
Jillian Lye, Stephanie Parkinson, Nicola Diamond, Jenny Downs, Susan Morris
The strategy used to generate power for forward propulsion in walking and running has recently been highlighted as a marker of gait maturation and elastic energy recycling. This study investigated ankle and hip power generation as a propulsion strategy (PS) during the late stance/early swing phases of walking and running in typically developing (TD) children (15: six to nine years; 17: nine to 13years) using three-dimensional gait analysis. Peak ankle power generation at push-off (peakA2), peak hip power generation in early swing (peakH3) and propulsion strategy (PS) [peakA2/(peakA2+peakH3)] were calculated to provide the relative contribution of ankle power to total propulsion...
October 17, 2016: Human Movement Science
https://www.readbyqxmd.com/read/27704157/different-synovial-vasculogenic-profiles-of-primary-rapidly-destructive-and-osteonecrosis-induced-hip-osteoarthritis-an-immunohistochemistry-study
#9
Simona Gurzu, Sabin Gligore Turdean, Sorin Tudor Pop, Ancuta Zazgyva, Ciprian Oliviu Roman, Mihaela Opris, Ioan Jung
PURPOSE: To present a hypothesis regarding the pathways of angiogenesis in primary versus secondary hip osteoarthritis (OA). METHODS: In synovial tissue samples provided by 57 consecutive patients who underwent hip arthroplasty, immunohistochemical examinations were performed using the following angiogenesis-related antibodies: VEGF-A, COX-2, maspin and the endothelial cells markers CD31 and CD105. The cases were divided into three categories: classic primary hip OA (group A; n = 16), rapidly destructive hip OA (group B; n = 24) and hip OA secondary to avascular osteonecrosis of the femoral head (group C; n = 17)...
October 4, 2016: International Orthopaedics
https://www.readbyqxmd.com/read/27642444/-total-hip-replacement-as-a-result-of-coxalgia-about-10-cases
#10
Aniss Chagou, Abdelatif Benbouha, Abdelkarim Rhanim, Abdou Lahlou, Mohammed Saleh Berrada, Moradh El Yaacoubi
Coxalgia causes osteocartilaginous destructions of the hip joint; these lesions are responsible for severe pain leading to functional discomfort and limitations in everyday life. Their surgical treatment is still not well established. The aim of our study was to demonstrate the interest of total hip arthroplasty associated with anti-tuberculous chemotherapy to improve patients' quality of life. We report a retrospective study of 10 cases of total hip replacement following coxalgia at the Department of Orthopaedics and Trauma of Rabat University Hospital from 2002 to 2011...
2016: Pan African Medical Journal
https://www.readbyqxmd.com/read/27632866/longitudinal-changes-in-hip-strength-and-range-of-motion-in-female-youth-soccer-players-implications-for-acl-injury-a-pilot-study
#11
Anh-Dung Nguyena, Emma F Zuka, Andrea L Baellowa, Kate R Pfileb, Lindsay J DiStefanoc, Michelle C Bolingd
CONTEXT: Risk of ACL injuries in young female athletes increases with age, appearing to peak during maturation. Changes in hip muscle strength and range of motion (ROM) during this time may contribute to altered dynamic movement patterns that are known to increase risk of ACL injuries. Understanding the longitudinal changes in hip strength and ROM is needed in order to develop appropriate interventions to reduce the risk of ACL injuries. OBJECTIVE: To examine the longitudinal changes in hip strength and ROM in female youth soccer players...
August 24, 2016: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/27586654/acetabular-version-increases-after-closure-of-the-triradiate-cartilage-complex
#12
Christoph E Albers, Andrea Schwarz, Markus S Hanke, Karl-Philipp Kienle, Stefan Werlen, Klaus A Siebenrock
BACKGROUND: Although the etiology of primary femoroacetabular impingement (FAI) is considered developmental, the underlying pathogenic mechanisms remain poorly understood. In particular, research identifying etiologic factors associated with pincer FAI is limited. Knowledge of the physiologic growth patterns of the acetabulum during skeletal maturation might allow conclusions on deviations from normal development that could contribute to pincer-related pathomorphologies. QUESTIONS/PURPOSES: In a population of healthy children, we asked if there were any differences related to skeletal maturation with regard to (1) acetabular version; (2) acetabular depth/width ratio; and (3) femoral head coverage in the same children as assessed by MRIs obtained 1 year apart...
September 1, 2016: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/27532816/efficient-generation-of-viral-and-integration-free-human-induced-pluripotent-stem-cell-derived-oligodendrocytes
#13
Araceli Espinosa-Jeffrey, Bruno Blanchi, Juan Carlos Biancotti, Shalini Kumar, Megumi Hirose, Berhan Mandefro, Dodanim Talavera-Adame, Nissim Benvenisty, Jean de Vellis
Here we document three highly reproducible protocols: (1) a culture system for the derivation of human oligodendrocytes (OLs) from human induced pluripotent stem cells (hiPS) and their further maturation-our protocol generates viral- and integration-free OLs that efficiently commit and move forward in the OL lineage, recapitulating all the steps known to occur during in vivo development; (2) a method for the isolation, propagation and maintenance of neural stem cells (NSCs); and (3) a protocol for the production, isolation, and maintenance of OLs from perinatal rodent and human brain-derived NSCs...
August 17, 2016: Current Protocols in Stem Cell Biology
https://www.readbyqxmd.com/read/27508034/effects-of-osteoprotegerin-rank-and-rankl-on-bone-destruction-and-collapse-in-avascular-necrosis-femoral-head
#14
Ming-Yue Xiong, Li-Qiang Liu, Shi-Qiong Liu, Zhen-Hui Liu, Hang-Fei Gao
Avascular necrosis of femoral head (AVFH) is a clinically recalcitrant disease of hip that leads to joint destruction. Osteoprotegerin (OPG), receptor activator of nuclear factor kappa-B (RANK) and RANK ligand (RANKL) regulates the balance, maturation and function of osteoclast and bone remodeling. This study aims to investigate molecular pathways which leads to AVN by studying expression profile of OPG, RANK and RANKL genes. Quantitative Real Time-PCR is used to evaluate mRNA expression of OPG, RANK and RANKL...
2016: American Journal of Translational Research
https://www.readbyqxmd.com/read/27497902/effect-of-milk-replacer-program-on-calf-performance-and-digestion-of-nutrients-in-dairy-calves-to-4-months-of-age
#15
T M Hill, J D Quigley, H G Bateman, F X Suarez-Mena, T S Dennis, R L Schlotterbeck
Calves fed >0.7kg of dry matter from milk replacer (MR) typically have greater growth preweaning but lower growth postweaning. This is partially explained by lower digestibility of starter due to less development of the rumen at and after weaning; however, it is unclear when digestibility matures postweaning to levels typical of mature ruminants. Thus, we fed Holstein calves (initially 2 to 3d of age) 3 MR programs (MOD=0.66kg daily for 39d, and then 0.33kg daily for 3d, n=15 calves; HIMOD=0.88kg daily for 5d, then 1...
October 2016: Journal of Dairy Science
https://www.readbyqxmd.com/read/27448860/association-of-calf-growth-traits-with-production-characteristics-in-dairy-cattle
#16
D L Van De Stroet, J A Calderón Díaz, K J Stalder, A J Heinrichs, C D Dechow
The objective of this study was to understand the associations of calf growth traits with subsequent milk yield and body weight (BW). Data were collected for 281 Holstein heifer calves from 6 different calf trials of varying lengths (4 to 8 wk) conducted at Pennsylvania State University between 2003 and 2010. Calves were classified as high, medium, or low for hip height, starter feed intake, BW, and growth rate. Milk yield and cow BW were recorded during subsequent lactations. In total, there were 169,734 daily milk records and 136,153 cow BW records available...
October 2016: Journal of Dairy Science
https://www.readbyqxmd.com/read/27443395/longitudinal-changes-in-hip-strength-and-range-of-motion-in-female-youth-soccer-players-implications-for-acl-injury-a-pilot-study
#17
Anh-Dung Nguyen, Emma F Zuk, Andrea L Baellow, Kate R Pfile, Lindsay J DiStefano, Michelle C Boling
CONTEXT: Risk of ACL injuries in young female athletes increases with age, appearing to peak during maturation. Changes in hip muscle strength and range of motion (ROM) during this time may contribute to altered dynamic movement patterns that are known to increase risk of ACL injuries. Understanding the longitudinal changes in hip strength and ROM is needed in order to develop appropriate interventions to reduce the risk of ACL injuries. OBJECTIVE: To examine the longitudinal changes in hip strength and ROM in female youth soccer players...
July 21, 2016: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/27442509/vertebral-adaptations-to-large-body-size-in-theropod-dinosaurs
#18
John P Wilson, D Cary Woodruff, Jacob D Gardner, Holley M Flora, John R Horner, Chris L Organ
Rugose projections on the anterior and posterior aspects of vertebral neural spines appear throughout Amniota and result from the mineralization of the supraspinous and interspinous ligaments via metaplasia, the process of permanent tissue-type transformation. In mammals, this metaplasia is generally pathological or stress induced, but is a normal part of development in some clades of birds. Such structures, though phylogenetically sporadic, appear throughout the fossil record of non-avian theropod dinosaurs, yet their physiological and adaptive significance has remained unexamined...
2016: PloS One
https://www.readbyqxmd.com/read/27437157/nontraumatic-myositis-ossificans-of-hip-a-case-presentation
#19
Yunus Oc, Muhammed Sefa Ozcan, Hasan Basri Sezer, Bekir Eray Kilinc, Osman Tugrul Eren
In most of the cases trauma is the leading etiology and the nontraumatic myositis ossificans (MO) is a very rare condition. We present an MO case without any trauma occurring. A 36-year-old female patient with a history of pain and restriction of range of motion of the left hip was admitted. Hip motions were restricted with 10-60° of flexion, 10° of internal rotation, 20° of external rotation, 10° of abduction, and 10° of adduction. There was no history of trauma and familial involvement. The biopsy of the lesion revealed mature bone tissue confirming our diagnosis of MO...
2016: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/27433860/timing-and-persistence-of-effect-of-conjugated-estrogens-bazedoxifene-in-postmenopausal-women
#20
Risa Kagan, Barry S Komm, Kelly A Ryan, Joanne Lavenberg, Ching-Ray Yu, JoAnn V Pinkerton
OBJECTIVE: The aim of the study was to determine the time course of effect with conjugated estrogens/bazedoxifene (CE/BZA) in nonhysterectomized postmenopausal women in five phase 3 trials. METHODS: This post hoc analysis identified when CE 0.45 mg/BZA 20 mg and CE 0.625 mg/BZA 20 mg first achieved a statistically significant difference (P < 0.05) versus placebo in individual trials and the duration the difference persisted for prespecified efficacy endpoints...
July 18, 2016: Menopause: the Journal of the North American Menopause Society
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