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Anterior hip

Lindsay V Slater, Joseph M Hart
The squat is an assessment of lower extremity alignment during movement, however there is little information regarding altered joint kinetics during poorly performed squats. The purpose of this study was to examine changes in joint kinetics and power from altered knee alignment during a squat. Thirty participants completed squats while displacing the knee medially, anteriorly, and with neutral alignment (control). Sagittal and frontal plane torques at the ankle, knee, and hip were altered in the descending and ascending phase of the squat in both the medial and anterior malaligned squat compared to the control squat...
October 12, 2016: Journal of Electromyography and Kinesiology
Benedict U Nwachukwu, Kara Fields, Brenda Chang, Danyal H Nawabi, Bryan T Kelly, Anil S Ranawat
BACKGROUND: There is increasing interest in defining meaningful improvement in patient-reported outcomes. Knowledge of the thresholds and determinants for successful femoroacetabular impingement (FAI) outcomes is evolving. PURPOSE: To define preoperative outcome score thresholds and determine clinical/demographic patient factors predictive for achieving the minimal clinically important difference (MCID) after arthroscopic FAI surgery. STUDY DESIGN: Cohort study (diagnosis); Level of evidence, 2...
October 20, 2016: American Journal of Sports Medicine
X M Lü, C Feng, Y F Dong, G Fu, Y Guo
Objective: To explore the influence of the labro-chondral complex (LLC) on the development of the acetabulum after close reduction in developmental dysplasia of the hip (DDH). Methods: Sixty-one cases (72 hips) with DDH presented in Beijing Jishuitan Hospital were reviewed, all the patients were treated by closed reduction, arthrogram and Spica casting from March 2010 to December 2013. The anterior-posterior pelvic radiography was performed to evaluate the morphology of the labro-chondral complex and reduction of the hip...
October 11, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
Joel Wells, Jeffrey J Nepple, Karla Crook, James R Ross, Asheesh Bedi, Perry Schoenecker, John C Clohisy
BACKGROUND: Hip dysplasia represents a spectrum of complex deformities on both sides of the joint. Although many studies have described the acetabular side of the deformity, to our knowledge, little is known about the three-dimensional (3-D) head and neck offset differences of the femora of dysplastic hips. A thorough knowledge of proximal femoral anatomy is important to prevent potential impingement and improve results after acetabular reorientation. QUESTIONS/PURPOSES: (1) Are there common proximal femoral characteristics in patients with symptomatic hip dysplasia undergoing periacetabular osteotomy (PAO)? (2) Where is the location of maximal femoral head and neck offset deformity in hip dysplasia? (3) Do certain subgroups of dysplastic hips more commonly have cam-type femoral morphology? (4) Is there a relationship between hip ROM as well as impingement testing and 3-D head and neck offset deformity? METHODS: Using our hip preservation database, 153 hips (148 patients) underwent PAO from October 2013 to July 2015...
October 17, 2016: Clinical Orthopaedics and related Research
B Sunil Abhishek, Sai C Vijay, V Avanthi, B Kumar
INTRODUCTION: Cardiovascular disorders are the major cause of mortality and morbidity globally as well as in India. In India, where resources are limited and majority of patients pay out of their own pocket, thrombolysis is still done for majority of STEMI cases. CASE SCENARIO: A 48-year-old male patient, nonhypertensive and nondiabetic, came to the ER with history of retrosternal chest pain suggestive of angina at rest. An Electrocardiogram (ECG) revealed ST-segment elevation in the anterior leads...
September 2016: Indian Heart Journal
E K Greska, N Cortes, S I Ringleb, J A Onate, B L Van Lunen
Previous studies have shown conflicting information regarding leg dominance as an etiological factor for the risk of anterior cruciate ligament (ACL) injuries. It remains unclear if lower extremity neuromechanical limb asymmetries exist in experienced athletes. The purpose of this study was to evaluate lower extremity neuromechanical effects of leg dominance in female collegiate soccer athletes during an unanticipated side-step cutting task. Twenty female collegiate soccer players completed an unanticipated side-step cutting task, using their dominant and non-dominant legs...
October 17, 2016: Scandinavian Journal of Medicine & Science in Sports
Helen Anwander, Klaus A Siebenrock, Moritz Tannast, Simon D Steppacher
BACKGROUND: Since the importance of an intact labrum for normal hip function has been shown, labral reattachment has become the standard method for open or arthroscopic treatment of hips with femoroacetabular impingement (FAI). However, no long-term clinical results exist evaluating the effect of labral reattachment. A 2-year followup comparing open surgical treatment of FAI with labral resection versus reattachment was previously performed at our clinic. The goal of this study was to report a concise followup of these patients at a minimum of 10 years...
October 15, 2016: Clinical Orthopaedics and related Research
Julia R Dahlqvist, Christoffer R Vissing, Gitte Hedermann, Carsten Thomsen, John Vissing
PURPOSE: The aim of this study was to investigate the age-related changes in fatty replacement and cross sectional area (CSA) of cervical, thoracic and lumbar paraspinal muscles vs. leg muscles in healthy adults, and to test for association between muscle fat fraction and lifestyle factors. METHODS: Fifty-three healthy adults (24-76 years) were included. Dixon MRI technique was used to determine CSA and quantify fat fraction of paraspinal and leg muscles. Muscle CSA and fat fractions were tested for association with age and muscle strength...
October 13, 2016: Medicine and Science in Sports and Exercise
Chad D Watts, Matthew T Houdek, Cody C Wyles, Rafael J Sierra, Robert T Trousdale, Michael J Taunton
We conducted a study to compare 90-day outcomes of patients who underwent simultaneous bilateral total hip arthroplasties (THAs) through the direct anterior (DA) approach (n = 19 patients) or the posterior approach (n = 21) over a 2-year period (2012-2014). Compared with patients in the posterior group, patients in the DA group had longer operative times (153 vs 106 min; P < .001) and longer anesthesia times (257 vs 221 min; P = .007) but were more likely to be discharged home (100.0% vs 71.4%; P = .02)...
September 2016: American Journal of Orthopedics
M Cody O'Dell, Diego Jaramillo, Laura Bancroft, Laura Varich, Gregory Logsdon, Sabah Servaes
With increasing participation and intensity of training in youth sports in the United States, the incidence of sports-related injuries is increasing, and the types of injuries are shifting. In this article, the authors review sports injuries of the lower extremity, including both acute and overuse injuries, that are common in or specific to the pediatric population. Common traumatic injuries that occur in individuals of all ages (eg, tears of the acetabular labrum and anterior cruciate ligament) are not addressed, although these occur routinely in pediatric sports...
October 2016: Radiographics: a Review Publication of the Radiological Society of North America, Inc
Jernej Čamernik, Zrinka Potocanac, Luka Peternel, Jan Babič
When balance is exposed to perturbations, hand contacts are often used to assist postural control. We investigated the immediate and the transitionary effects of supportive hand contacts during continuous anteroposterior perturbations of stance by automated waist-pulls. Ten young adults were perturbed for 5 min and required to maintain balance by holding to a stationary, shoulder-high handle and following its removal. Center of pressure (COP) displacement, hip, knee and ankle angles, leg and trunk muscle activity and handle contact forces were acquired...
2016: Frontiers in Human Neuroscience
Jing-Xin Zhao, Xiu-Yun Su, Ruo-Xiu Xiao, Zhe Zhao, Li-Hai Zhang, Li-Cheng Zhang, Pei-Fu Tang
We established a mathematical method to precisely calculate the radiographic anteversion (RA) and radiographic inclination (RI) angles of the acetabular cup based on anterior-posterior (AP) pelvic radiographs after total hip arthroplasty. Using Mathematica software, a mathematical model for an oblique cone was established to simulate how AP pelvic radiographs are obtained and to address the relationship between the two-dimensional and three-dimensional geometry of the opening circle of the cup. In this model, the vertex was the X-ray beam source, and the generatrix was the ellipse in radiographs projected from the opening circle of the acetabular cup...
October 5, 2016: Medical Engineering & Physics
Hal D Martin, Anthony N Khoury, Ricardo Schröder, Eric Johnson, Juan Gómez-Hoyos, Salvador Campos, Ian J Palmer
PURPOSE: To determine the isolated function of the pubofemoral ligament of the hip capsule and its contribution to hip stability in external/internal rotational motion during flexion greater than 30° and abduction. METHODS: Thirteen hips from 7 fresh-frozen pelvis-to-toe cadavers were skeletonized from the lumbar spine to the distal femur with the capsular ligaments intact. Computed tomographic imaging was performed to ensure no occult pathological state existed, and assess bony anatomy...
October 5, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
Nicholas Quercetti, Brandon Horne, Zac DiPaolo, Michael J Prayson
BACKGROUND: Traditionally, operative fixation of pelvic and acetabular injuries involves complex approaches and significant complications. Accelerated rehabilitation, decreased soft tissue stripping and decreased wound complications are several benefits driving a recent interest in percutaneous fixation. We describe a new fluoroscopic view to guide the placement of screws within the anterior pelvic ring. METHODS: Twenty retrograde anterior pelvic ring screws were percutaneously placed in ten cadaveric specimens...
October 7, 2016: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
Xuyi Wang, Jianping Peng, De Li, Linlin Zhang, Hui Wang, Leisheng Jiang, Xiaodong Chen
BACKGROUND: The success of Bernese periacetabular osteotomy depends significantly on how extent the acetabular fragment can be corrected to its optimal position. This study was undertaken to investigate whether correcting the acetabular fragment into the so-called radiological "normal" range is the best choice for all developmental dysplasia of the hip with different severities of dysplasia from the biomechanical view? If not, is there any correlation between the biomechanically optimal position of the acetabular fragment and the severity of dysplasia? METHODS: Four finite element models with different severities of dysplasia were developed...
October 4, 2016: Journal of Orthopaedic Surgery and Research
Travis J Menge, Justin J Mitchell, Karen K Briggs, Marc J Philippon
There has been growing interest in recent years on the functional importance of the ligamentum teres and its role in hip stability. Partial or complete tearing has previously been treated with debridement or radiofrequency ablation with good results; however, a subset of patients will continue to experience persistent pain or instability with injury to this structure. Advances in arthroscopic instruments and techniques have led to our ability to provide improved care for these patients by performing a ligamentum teres reconstruction...
August 2016: Arthroscopy Techniques
Antonia F Chen, Chi-Lung Chen, Sara Low, Wei-Ming Lin, Karthikeyan Chinnakkannu, Fabio R Orozco, Alvin C Ong, Zachary D Post
BACKGROUND: Surgical approach is known as a risk factor that influences cup malposition while performing total hip arthroplasty (THA). However, no study has been conducted comparing cup positioning between the supine direct anterior (DA) and supine direct lateral (DL) THA approaches. QUESTIONS/PURPOSES: (1) Is there a difference in acetabular cup positioning between supine DA and supine DL THA approaches? (2) Are there differences in complications based on acetabular cup positioning between the two approaches? METHODS: From 2012 to 2014, 186 patients who underwent primary THAs using DA approach were matched with 186 patients using DL approach by body mass index, age, and gender...
October 2016: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
Kotaro R Shibata, Shuichi Matsuda, Marc R Safran
PURPOSE: The purpose of this study was to determine whether or not there is a distinct pattern of injury to the acetabular labrum and/or cartilage in the hip with instability without bony dysplasia. METHODS: Surgical records and intra-operative images of consecutive patients who underwent primary hip arthroscopy for femoroacetabular impingement (FAI) and/or hip instability by the senior author from April 2007 to December 2014 were retrospectively reviewed. Pathological changes were documented and charted on a novel diagram of the acetabulum, and classified into eight patterns corresponding to the lesion's location and size...
October 1, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Tze E Cheng, Jason A Wallis, Nicholas F Taylor, Chris T Holden, Paul Marks, Catherine L Smith, Michael S Armstrong, Parminder J Singh
BACKGROUND: We report a prospective randomized study comparing early clinical results between the direct anterior approach (DAA) and posterior approach (PA) in primary hip arthroplasty. METHODS: Surgeries were performed by 2 senior hip arthroplasty surgeons. Seventy-two patients with complete data were assessed preoperatively 2, 6, and 12 weeks postoperatively. The primary outcomes were the Western Ontario McMasters Arthritis Index and Oxford Hip Scores. Secondary outcome measures included the EuroQoL, 10-meter walk test, and clinical and radiographic parameters...
August 31, 2016: Journal of Arthroplasty
Z L Luo, M Chen, X F Shang, F Hu, Z Ni, P Cheng, X F Ji, K R Wu, X Q Zhang
Objective: To compare the clinical efficacy of the direct anterior approach (DAA) and the posterolateral approach (PLA) for total hip arthroplasty (THA) in the lateral decubitus position. Methods: From July to December, 2014, 104 patients randomly divided into two equal groups of the DAA group and the PLA group underwent unilateral primary THA procedures.All procedures were performed by the same surgeon in the Department of Orthopaedics, the Affiliated Anhui Provincial Hospital of Anhui Medical University.General data, perioperative index, postoperative function and radiological evaluation were recorded and statistically analyzed...
September 20, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
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