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https://www.readbyqxmd.com/read/28529662/femoral-and-acetabular-re-alignment-in-slipped-capital-femoral-epiphysis
#1
M Leunig, H M Manner, L Turchetto, R Ganz
NEW PATHOPHYSIOLOGICAL INSIGHTS: Based on improved knowledge of the vascular supply of the proximal femur, a safe surgical dislocation of the hip joint was established allowing direct insights to the pathomorphological malfunctioning of the joint. One insight was that slipped capital femoral epiphysis (SCFE) impingement leads to substantial damage of the chondrolabral rim area, even in the presence of minor slips. A further surgical development was the extended retinacular flap allowing for correction of the deformity with calculable risk for iatrogenic necrosis...
April 2017: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/28529111/the-results-of-total-hip-arthroplasty-after-sugioka-transtrochanteric-anterior-rotational-osteotomy-for-osteonecrosis
#2
Takeshi Utsunomiya, Goro Motomura, Satoshi Ikemura, Satoshi Hamai, Jun-Ichi Fukushi, Yasuharu Nakashima
BACKGROUND: Since Sugioka transtrochanteric anterior rotational osteotomy (ARO) for osteonecrosis of the femoral head (ONFH) changes the morphology of the proximal femur, total hip arthroplasty (THA) after previous ARO is considered a technically demanding procedure. The purpose of this study was to compare the clinicoradiologic outcomes of THA after ARO with those of THA without any antecedent surgery for ONFH. METHODS: Twenty-four hips in 20 patients who underwent cementless THA after ARO (postosteotomy group) were retrospectively reviewed and compared with patients who underwent cementless THA without any antecedent surgery for ONFH during the same period (primary group)...
April 27, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28511947/intraoperative-femur-fracture-risk-during-primary-direct-anterior-approach-cementless-total-hip-arthroplasty-with-and-without-a-fracture-table
#3
Eric M Cohen, Joshua J Vaughn, Scott A Ritterman, Daniel L Eisenson, Lee E Rubin
BACKGROUND: There is no study to date comparing intraoperative femur fractures (IFFs) in the direct anterior approach (DAA) with and without a fracture table. We hypothesize that there is no significant difference in the IFF with and without a fracture table when performed by experienced DAA hip surgeons. METHODS: This study is a 1-year retrospective review of patients who underwent DAA total hip arthroplasty by 2 surgeons: one surgeon uses a flat table and manually elevates the femur with a large bone hook, while the other surgeon uses a fracture table and a mechanical femoral elevator...
April 21, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28509824/implant-survival-after-minimally-invasive-anterior-or-anterolateral-vs-conventional-posterior-or-direct-lateral-approach-an-analysis-of-21-860-total-hip-arthroplasties-from-the-norwegian-arthroplasty-register-2008-to-2013
#4
Knut Erik Mjaaland, Svein Svenningsen, Anne Marie Fenstad, Leif I Havelin, Ove Furnes, Lars Nordsletten
BACKGROUND: Since 2008, there has been an increase in the use of minimally invasive surgery (MIS) through an anterior or anterolateral approach for total hip arthroplasty (THA) in Norway. We compared the MIS approaches with the conventional posterior and direct lateral approaches in terms of revision rates and risk of revision. METHODS: On the basis of data in the Norwegian Arthroplasty Register, 21,860 THAs with an uncemented stem, performed between 2008 and 2013, were identified and included in the cohort...
May 17, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28509584/the-influence-of-the-crutch-setup-on-stability-and-weight-bearing-parameters-in-post-total-hip-replacement-surgery-patients-during-quiet-standing
#5
Francesco Esposito, Marco Freddolini, Leonardo Latella, Palmina Braccio, Massimiliano Marcucci, Andrea Corvi
PURPOSE: The purpose of this study is to evaluate the influence of the crutch setup on standing, in post total hip replacement (THR) surgery patients. MATERIALS AND METHODS: Thirty patients after THR were randomly assigned to walking with the elbow flexed (EF) or elbow straight (ES) crutch setup. Subjects were asked to stand on a force platform in a comfortable position with the crutch positioned on the unaffected side, facing forward for 10 seconds. Centre of pressure total path and maximal excursion were evaluated in both medio-lateral and anterior-posterior planes...
May 16, 2017: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/28501732/asymmetrical-stabilization-and-mobilization-exploited-during-static-single-leg-stance-and-goal-directed-kicking
#6
Adam C King, Zheng Wang
The motor control properties of the right and left legs are dependent on the stabilization and mobilization features of the motor tasks. The current investigation examined the right and left leg control differences - interlateral asymmetries - during static single leg stance and dynamic goal directed kicking with an emphasis of the asymmetrical stabilization and mobilization components of movements. Ten young, healthy, right-leg preferred individuals with minimal kicking experience completed both tests on each limb...
May 11, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28499624/acetabular-placement-accuracy-with-the-direct-anterior-approach-freehand-technique
#7
Melissa C Soderquist, Ryan Scully, Anthony S Unger
BACKGROUND: Acetabular cup placement in total hip arthroplasty (THA) has been recognized as an important factor in operative success, and accurate cup placement has been the impetus for novel medical technologies. METHODS: This article examines the cup placement in 955 THAs using a freehand Direct Anterior Approach on a standard operating table. Acetabular anteversion and inclination were determined using the circle theorem. Measurements were divided into safe zone placement determined by Callanan et al as 5°-25° for anteversion and 30°-45° for inclination, as well as by Lewinnek et al as 5°-25° for anteversion and 30°-50° for inclination...
April 18, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28497451/anterior-greater-trochanteric-muscle-pedicle-bone-grafting-a-viable-graft-option-adjunct-to-hip-osteotomy-or-fracture-surgery
#8
Noppachart Limpaphayom, Phatcharapa Osateerakun, Vajara Wilairatana, Pairatch Prasongchin
INTRODUCTION: The objectives were to evaluate a technique, outcome and complications following anterior greater trochanteric with gluteus medius muscle pedicle bone graft (AMG) procedure in the treatment of adolescent and active adult hip disorders. METHODS: 20 patients (20 hips) with a mean age of 22.7 ± 15.6 (range 10.0-63.5) years who had undergone AMG and been followed up more than 12 months postoperative were retrospectively enrolled in our study. The AMG procedure was performed in conjunction with subcapital osteotomy for slipped capital femoral epiphysis in 12 and open reduction for fracture/dislocation in 8 hips...
May 8, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28479057/a-single-center-experience-with-a-titanium-modular-neck-total-hip-arthroplasty
#9
Wade T Gofton, Emmanuel M Illical, Robert J Feibel, Paul R Kim, Paul E Beaulé
BACKGROUND: Added modular junction has been associated with implant-related failures. We report our experience with a titanium-titanium modular neck-stem interface to assess complications, possible clinical factors influencing use of neck modularity, and whether modularity reduced the incidence of dislocation. METHODS: A total of 809 total hip arthroplasties completed between 2005 and 2012 from a prospectively collected database were reviewed. The mean follow-up interval was 5...
March 20, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28466651/t2-mapping-of-the-hip-in-asymptomatic-volunteers-with-normal-cartilage-morphology-an-analysis-of-regional-and-age-dependent-distribution
#10
Tobias Hesper, Christoph Schleich, Alexander Buchwald, Harish S Hosalkar, Gerald Antoch, Rüdiger Krauspe, Christoph Zilkens, Bernd Bittersohl
Objective To assess age-dependent and regional differences in T2* relaxation measurements in hip joint cartilage of asymptomatic volunteers at 3 T. Design Three age cohorts (cohort 1: age 20-30 years, 15 individuals; cohort 2: age 30-40 years, 17 individuals; cohort 3: age 40-50 years, 15 individuals) were enrolled. T2* values were obtained in the central and peripheral cartilage of the acetabulum and the femoral head in 7 regions (anterior to superior and posterior). Results T2* did not differ among age cohorts in acetabular cartilage (cohort 1: 24...
December 1, 2016: Cartilage
https://www.readbyqxmd.com/read/28462802/relationship-between-the-mobility-of-medial-longitudinal-arch-and-postural-control
#11
Tansu Birinci, Sule Badıllı Demirbas
OBJECTIVE: The aim of this study was to analyze the relationship between the medial longitudinal arch mobility and static and dynamic balance. METHODS: A total of 50 subjects (25 female, and 25 male; Mean age: 22.2 ± 1.3 years; BMI: 22.8 ± 3.8 kg/m(2)) were included in this study. The relative arch deformity (RAD) was calculated with both 10% and 90% weight bearing (WB). Static balance was evaluated with Single Leg Stance Test and dynamic balance with TechnoBody PK 200WL computerized balance device...
April 24, 2017: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/28457606/combined-measurement-and-modeling-of-specimen-specific-knee-mechanics-for-healthy-and-acl-deficient-conditions
#12
Azhar A Ali, Michael D Harris, Sami Shalhoub, Lorin P Maletsky, Paul J Rullkoetter, Kevin B Shelburne
Quantifying the mechanical environment at the knee is crucial for developing successful rehabilitation and surgical protocols. Computational models have been developed to complement in vitro studies, but are typically created to represent healthy conditions, and may not be useful in modeling pathology and repair. Thus, the objective of this study was to create finite element (FE) models of the natural knee, including specimen-specific tibiofemoral (TF) and patellofemoral (PF) soft tissue structures, and to evaluate joint mechanics in intact and ACL-deficient conditions...
April 20, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28455466/dislocation-of-a-primary-total-hip-arthroplasty-is-more-common-in-patients-with-a-lumbar-spinal-fusion
#13
A J Buckland, V Puvanesarajah, J Vigdorchik, R Schwarzkopf, A Jain, E O Klineberg, R A Hart, J J Callaghan, H Hassanzadeh
AIMS: Lumbar fusion is known to reduce the variation in pelvic tilt between standing and sitting. A flexible lumbo-pelvic unit increases the stability of total hip arthroplasty (THA) when seated by increasing anterior clearance and acetabular anteversion, thereby preventing impingement of the prosthesis. Lumbar fusion may eliminate this protective pelvic movement. The effect of lumbar fusion on the stability of total hip arthroplasty has not previously been investigated. PATIENTS AND METHODS: The Medicare database was searched for patients who had undergone THA and spinal fusion between 2005 and 2012...
May 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28452043/comparison-of-clinical-results-and-patient-s-satisfaction-between-direct-anterior-approach-and-hardinge-approach-in-primary-total-hip-arthroplasty-in-a-community-hospital
#14
C Trevisan, R Compagnoni, R Klumpp
INTRODUCTION: Aim of the study is to compare clinical results and patient's satisfaction between direct anterior approach and Hardinge approach in primary total hip arthroplasty. METHODS: A group of 30 patients operated with DAA (group B) were compared to 39 patients operated by Hardinge approach (group A). Peri- and postoperative complications, Harris Hip Score (HHS), implant positioning, experienced pain and patient satisfaction were evaluated at a mean follow-up of 30 months...
April 27, 2017: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/28451863/variations-in-knee-kinematics-after-acl-injury-and-after-reconstruction-are-correlated-with-bone-shape-differences
#15
Drew A Lansdown, Valentina Pedoia, Musa Zaid, Keiko Amano, Richard B Souza, Xiaojuan Li, C Benjamin Ma
BACKGROUND: The factors that contribute to the abnormal knee kinematics after anterior cruciate ligament (ACL) injury and ACL reconstruction remain unclear. Bone shape has been implicated in the development of hip and knee osteoarthritis, although there is little knowledge about the effects of bone shape on knee kinematics after ACL injury and after ACL reconstruction. QUESTIONS/QUESTIONS: (1) What is the relationship between bony morphology with alterations in knee kinematics after ACL injury? (2) Are baseline bone shape features related to abnormal knee kinematics at 12 months after ACL reconstruction? METHODS: Thirty-eight patients (29 ± 8 years, 21 men) were prospectively followed after acute ACL injury and before ligamentous reconstruction...
April 27, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28451620/generalized-joint-hypermobility-is-predictive-of-hip-capsular-thickness
#16
Brian M Devitt, Bjorn N Smith, Robert Stapf, Mark Tacey, John M O'Donnell
BACKGROUND: The pathomechanics of hip microinstability are not clearly defined but are thought to involve anatomical abnormalities, repetitive forces across the hip, and ligamentous laxity. PURPOSE/HYPOTHESIS: The purpose of this study was to explore the relationship between generalized joint hypermobility (GJH) and hip capsular thickness. The hypothesis was that GJH would be predictive of a thin hip capsule. STUDY DESIGN: Cross-sectional study; Level of evidence, 3...
April 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28451616/relationship-between-the-lateral-center-edge-angle-and-3-dimensional-acetabular-coverage
#17
James D Wylie, Ashley L Kapron, Christopher L Peters, Stephen K Aoki, Travis G Maak
BACKGROUND: The lateral center-edge angle (LCEA) is an important measurement in understanding acetabular morphology and has had multiple interpretations. Misunderstanding of the LCEA and its relationship with acetabular 3-dimensional (3D) morphology may result in misdiagnosis and poor outcomes. PURPOSE: To determine the discrepancy between bone-edge and sourcil-edge LCEA measurements on anteroposterior (AP) radiographs and to determine the 3D anatomic location of the sourcil-edge and bone-edge LCEA measurements...
April 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28443189/intraoperative-dislocation-of-the-trial-bipolar-cup-into-the-pelvis-during-bipolar-hip-arthroplasty-a-case-report
#18
Takahito Miyake, Akio Kanda, Itaru Morohashi, Osamu Obayashi, Atsuhiko Mogami, Kazuo Kaneko
INTRODUCTION: Bipolar hip arthroplasty is a good option for treating femoral neck fractures, although some contraindications have been indicated. We report a case of intraoperative dislocation of the trial bipolar cup into the pelvis during bipolar hip arthroplasty. CASE PRESENTATION: A 74-year-old woman underwent bipolar hip arthroplasty for a femoral neck fracture (AO31-B2). She was placed in a lateral decubitus position, and a direct lateral approach was used...
June 2017: Annals of Medicine and Surgery
https://www.readbyqxmd.com/read/28441059/effectiveness-of-neuromuscular-training-based-on-the-neuromuscular-risk-profile
#19
Timothy E Hewett, Kevin R Ford, Yingying Y Xu, Jane Khoury, Gregory D Myer
BACKGROUND: The effects of targeted neuromuscular training (TNMT) on movement biomechanics associated with the risk of anterior cruciate ligament (ACL) injuries are currently unknown. Purpose/Hypotheses: To determine the effectiveness of TNMT specifically designed to increase trunk control and hip strength. The hypotheses were that (1) TNMT would decrease biomechanical and neuromuscular factors related to an increased ACL injury risk and (2) TNMT would decrease these biomechanical and neuromuscular factors to a greater extent in athletes identified as being at a high risk for future ACL injuries...
April 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28440704/effect-of-femoral-head-size-and-surgical-approach-on-risk-of-revision-for-dislocation-after-total-hip-arthroplasty
#20
Wierd P Zijlstra, Bas De Hartog, Liza N Van Steenbergen, B Willem Scheurs, Rob G H H Nelissen
Background and purpose - Recurrent dislocation is the commonest cause of early revision of a total hip arthropasty (THA). We examined the effect of femoral head size and surgical approach on revision rate for dislocation, and for other reasons, after total hip arthroplasty (THA). Patients and methods - We analyzed data on 166,231 primary THAs and 3,754 subsequent revision THAs performed between 2007 and 2015, registered in the Dutch Arthroplasty Register (LROI). Revision rate for dislocation, and for all other causes, were calculated by competing-risk analysis at 6-year follow-up...
April 25, 2017: Acta Orthopaedica
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