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femoral torsion

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https://www.readbyqxmd.com/read/29775910/hip-and-patellofemoral-joint-loading-during-gait-are-increased-in-children-with-idiopathic-torsional-deformities
#1
Elyse Passmore, H Kerr Graham, Marcus G Pandy, Morgan Sangeux
BACKGROUND: Torsional deformities of the femur and tibia are associated with gait impairments and joint pain. Several studies have investigated these gait deviations in children with cerebral palsy. However, relatively little is known about gait deviations in children with idiopathic torsion and debate ensues about the management of these patients. RESEARCH QUESTION: What are the effects of idiopathic increased femoral neck anteversion and external tibial torsion on lower-limb kinematics, kinetics and joint loading during gait in children and adolescents...
May 9, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29748964/is-augmented-liss-plating-biomechanically-advantageous-over-conventional-liss-plating-in-unstable-osteoporotic-distal-femoral-fractures
#2
Dimitar Todorov, Ivan Zderic, R Geoff Richards, Mark Lenz, Matthias Knobe, Dian Enchev, Asen Baltov, Boyko Gueorguiev, Karl Stoffel
Treatment of complex osteoporotic distal femur fractures with the Less Invasive Stabilization System (LISS) has been associated with high complication rates. The aim of this study was to investigate the biomechanical competence of two different techniques of augmented versus conventional LISS plating. Unstable distal femoral fracture AO/OTA 33-A3 was created via osteotomies in artificial femora simulating osteoporotic bone. Three study groups, consisting of 10 specimens each, were created for instrumentation with either LISS plate, LISS plate with additional polylactide intramedullary graft, or LISS plate plus medial locking plate (double plating)...
May 10, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29733696/mri-assessment-of-supra-and-infratrochanteric-femoral-torsion-association-with-femoroacetabular-impingement-and-hip-dysplasia
#3
Benjamin Fritz, Susanne Bensler, Michael Leunig, Patrick O Zingg, Christian W A Pfirrmann, Reto Sutter
OBJECTIVE: The objective of our study was to evaluate a novel measurement technique for assessing the supra- and infratrochanteric components of femoral torsion, establish reference values in healthy volunteers, and compare supra- and infratrochanteric torsion angles in patients with hip dysplasia and patients with femoroacetabular impingement (FAI) with those in healthy volunteers. MATERIALS AND METHODS: Femoral torsion was assessed in 380 patients and 61 healthy volunteers on MRI...
May 7, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29733439/proximal-versus-distal-femoral-derotation-osteotomy-in-bilateral-cerebral-palsy
#4
Mirjam Niklasch, Elizabeth R Boyer, Tom Novacheck, Thomas Dreher, Michael Schwartz
AIM: Femoral derotation osteotomy (FDO) can be conducted either proximally or distally to correct internal rotation gait (IRG) and increased anteversion in children with cerebral palsy (CP). Previous studies with limited numbers of participants have presented comparable short-term static and kinematic outcomes for both techniques. The objective of this retrospective multicentre study was to verify this thesis with a larger number of patients. METHOD: In total, 119 children with CP and IRG were included after matching the groups on preoperative mean stance hip rotation: 67 intertrochanteric (proximal group) FDO (average age at surgery 9y [SD 3y]); 52 supracondylar (distal group) FDO (average age at surgery 12y [SD 3y])...
May 7, 2018: Developmental Medicine and Child Neurology
https://www.readbyqxmd.com/read/29727021/biomechanics-of-two-external-fixator-devices-used-in-rat-femoral-fractures
#5
Liza Osagie-Clouard, Joshua Kaufmann, Gordon Blunn, Melanie Coathup, Catherine Pendegrass, Richard Meeson, Timothy Briggs, Mehran Moazen
The use of external fixators allows for the direct investigation of newly formed interfragmentary bone, and the radiographic evaluation of the fracture. We validated the results of a finite element model with the in vitro stiffness' of two widely used external fixator devices used for in vivo analysis of fracture healing in rat femoral fractures with differing construction (Ti alloy ExFix1 and PEEK ExFix2). Rat femoral fracture fixation was modelled using two external fixators. For both constructs an osteotomy of 2...
May 4, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29703261/biomechanical-analysis-of-plate-systems-for-proximal-humerus-fractures-a-systematic-literature-review
#6
REVIEW
Ali Jabran, Chris Peach, Lei Ren
BACKGROUND: Proximal humerus fractures are the third most common in the human body but their management remains controversial. Open reduction and internal fixation with plates is one of the leading modes of operative treatment for these fractures. The development of technologies and techniques for these plates, during the recent decades, promise a bright future for their clinical use. A comprehensive review of in vitro biomechanical studies is needed for the comparison of plates' mechanical performance and the testing methodologies...
April 27, 2018: Biomedical Engineering Online
https://www.readbyqxmd.com/read/29697490/lower-extremity-rotational-profile-and-toe-walking-in-preschool-children-with-autism-spectrum-disorder
#7
Atilla Arik, Cemalettin Aksoy, Ayla Aysev, Melda Akçakin
The aim of this study was to establish the torsional and toe-walking profiles of children with autism spectrum disorder (ASD), and to analyze the correlations between torsion, toe-walking, autism severity score, and age. In total, 79 consecutive children with autism were examined to determine their hip rotations, thigh-foot angle, degree of toe-walking, and autism severity. Femoral and tibial torsion values, of the preschool patients, were compared statistically with age-matched controls. The hip rotation profile of the patients was similar to the normal group...
April 24, 2018: Journal of Pediatric Orthopedics. Part B
https://www.readbyqxmd.com/read/29696606/femoral-derotational-osteotomies
#8
REVIEW
Manfred Nelitz
PURPOSE OF REVIEW: Femoral derotational osteotomies are performed to correct residual symptomatic increased femoral torsion in adolescents and adults. Typical indications are anterior knee pain caused by patellar maltracking and patellofemoral instability. There is still no consensus as to what the correct indication is and which surgical techniques lead to the best outcomes in performing a femoral derotational osteotomy. RECENT FINDINGS: Good early clinical outcomes have been reported...
April 25, 2018: Current Reviews in Musculoskeletal Medicine
https://www.readbyqxmd.com/read/29683001/relationship-between-femoral-anteversion-and-tibial-torsion-ct-evaluation-of-38-unilateral-developmental-dysplasia-of-the-hip-patients
#9
Kyu-Jin Cho, Kyung-Soon Park, Young-Rok Shin, Hong-Yeol Yang, Taek-Rim Yoon
INTRODUCTION: Patients with developmental dysplasia of the hip (DDH) present with a wide spectrum of deformities. Few studies have assessed the relationship between femoral anteversion (FA) and rotational profile. The aim of this study is to evaluate the influence of FA on the lower extremity rotational profile by comparing tibial torsion (TT) between the extremities on both sides in patients with unilateral DDH, using computed tomography (CT). PATIENTS AND METHODS: Thirty eight patients with unilateral developmental dysplasia of the hip, who underwent a preoperative rotational profile CT scan at our institution, were evaluated...
April 1, 2018: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/29679859/the-relationship-of-age-activity-and-body-size-on-osteoarthritis-in-weight-bearing-skeletal-regions
#10
Stephanie E Calce, Helen K Kurki, Darlene A Weston, Lisa Gould
This study examined the simultaneous impact of multiple underlying factors on OA expression in weight-bearing joints of the vertebrae and lower limb of a modern European skeletal sample (Lisbon and Sassari). OA was evaluated using standard ranked categorical scoring; composite OA scores derived through principal component analysis. Body size was calculated from postcranial measurements; torsional strength (J) of the femoral midshaft was calculated from three-dimensional surface models, size standardized and used as a proxy for activity...
April 18, 2018: International Journal of Paleopathology
https://www.readbyqxmd.com/read/29679683/is-distal-femoral-torsion-the-same-in-both-of-a-patient-s-legs-morphometric-ct-study
#11
J-S Beranger, D Dujardin, J-F Taburet, P Boisrenoult, C Steltzlen, P Beaufils, N Pujol
INTRODUCTION: The rotational position of the femoral component is a primary driver of success in total knee arthroplasty. However, distal femoral torsion (DFT) varies greatly between individuals. Measuring DFT preoperatively by CT in combination with computer-assisted surgery can significantly improve the rotational positioning of the femoral component. However, a preoperative CT scan is costly and exposes the patient to radiation. These are doubled when the patient is undergoing bilateral arthroplasty...
April 18, 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29653317/increased-torsional-stability-by-a-novel-femoral-neck-locking-plate-the-role-of-plate-design-and-pin-configuration-in-a-synthetic-bone-block-model
#12
Jan Egil Brattgjerd, Martin Loferer, Sanyalak Niratisairak, Harald Steen, Knut Strømsøe
BACKGROUND: In undisplaced femoral neck fractures, internal fixation remains the main treatment, with mechanical failure as a frequent complication. As torsional stable fixation promotes femoral neck fracture healing, the Hansson Pinloc® System with a plate interlocking pins, was developed from the original hook pins. Since its effect on torsional stability is undocumented, the novel implant was compared with the original configurations. METHODS: Forty-two proximal femur models custom made of two blocks of polyurethane foam were tested...
March 27, 2018: Clinical Biomechanics
https://www.readbyqxmd.com/read/29605796/femoral-anteversion-assessment-comparison-of-physical-examination-gait-analysis-and-eos-biplanar-radiography
#13
David E Westberry, Linda I Wack, Roy B Davis, James W Hardin
BACKGROUND: Multiple measurement methods are available to assess transverse plane alignment of the lower extremity. RESEARCH QUESTION: This study was performed to determine the extent of correlation between femoral anteversion assessment using simultaneous biplanar radiographs and three-dimensional modeling (EOS imaging), clinical hip rotation by physical examination, and dynamic hip rotation assessed by gait analysis. METHODS: Seventy-seven patients with cerebral palsy (GMFCS Level I and II) and 33 neurologically typical children with torsional abnormalities completed a comprehensive gait analysis with same day biplanar anterior-posterior and lateral radiographs and three-dimensional transverse plane assessment of femoral anteversion...
March 26, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29570762/the-proximal-and-distal-femoral-canal-geometry-influences-cementless-stem-anchorage-and-revision-hip-and-knee-implant-stability
#14
Markus Heinecke, Fabian Rathje, Frank Layher, Georg Matziolis
Although cementless revision arthroplasty of the hip has become the gold standard, revision arthroplasty of the distal femur is controversial. This study evaluated the anchoring principles of different femoral revision stem designs in extended bone defect situations, taking into account the anatomical conditions of the proximal and distal femur, and the resulting primary stability. Cementless press-fit stems of 4 different designs were implanted in synthetic femurs. The specimens were analyzed by computed tomography and were tested considering axial/torsional stiffness and migration resistance...
March 23, 2018: Orthopedics
https://www.readbyqxmd.com/read/29534279/a-comparison-of-angular-values-of-the-pelvic-limb-with-normal-and-medial-patellar-luxation-stifles-in-chihuahua-dogs-using-radiography-and-computed-tomography
#15
Thitaporn Phetkaew, Marissak Kalpravidh, Rampaipat Penchome, Chalika Wangdee
OBJECTIVE:  This article aimed to determine and compare the angular values of the pelvic limb in normal and medial patellar luxation (MPL) stifles in Chihuahuas using radiography and computed tomographic (CT) scan, to identify the relationship between pelvic limb angles and severity of MPL. In addition, radiographic and CT images were compared to determine the more suitable method of limb deformity assessment. METHODS:  Sixty hindlimbs of Chihuahuas were divided into normal and grade 1, 2, 3 and 4 MPL groups...
February 2018: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/29517923/anatomic-predictors-of-sagittal-hip-and-pelvic-motions-in-patients-with-a-cam-deformity
#16
K C Geoffrey Ng, Mario Lamontagne, Jonathan R T Jeffers, George Grammatopoulos, Paul E Beaulé
BACKGROUND: As there is a high prevalence of patients with cam deformities and no ongoing hip dysfunction, understanding the biomechanical factors predicting the onset of symptoms and degenerative changes is critical. One such variable is how the spinopelvic parameters may influence hip and pelvic sagittal mobility. Hypothesis/Purpose: Pelvic incidence may predict sagittal hip and pelvic motions during walking and squatting. The purpose was to determine which anatomic characteristics were associated with symptoms and how they influenced functional hip and pelvic ranges of motion (ROMs) during walking and squatting...
May 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29506933/extrinsic-factors-as-component-positions-to-bone-and-intrinsic-factors-affecting-postoperative-rotational-limb-alignment-in-total-knee-arthroplasty
#17
Tomoharu Mochizuki, Takashi Sato, Osamu Tanifuji, Satoshi Watanabe, Koichi Kobayashi, Naoto Endo
BACKGROUND: This study aimed to identify the factors affecting postoperative rotational limb alignment of the tibia relative to the femur. We hypothesized that not only component positions but also several intrinsic factors were associated with postoperative rotational limb alignment. METHODS: This study included 99 knees (90 women and 9 men) with a mean age of 77 ± 6 years. A three-dimensional (3D) assessment system was applied under weight-bearing conditions to biplanar long-leg radiographs using 3D-to-2D image registration technique...
February 13, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29490972/left-ventricular-torsion-associated-with-aortic-stiffness-in-hypertension
#18
Jean-Barthelemy Gnakamene, Michel E Safar, Bernard I Levy, Brigitte Escoubet
BACKGROUND: Left ventricular (LV) torsion plays a key role in cardiac efficiency. In hypertension, aortic stiffening augments cardiac afterload. However, little is known about the links between LV regional contraction and aortic stiffness. We, therefore, investigated these relationships and their contribution to LV diastolic function. METHODS AND RESULTS: The study included normotensive and hypertensive individuals with normal LV ejection. Apical, basal, and global LV rotation rate and LV global longitudinal strain were measured (2-dimensional speckle tracking echocardiography)...
February 28, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29428094/automated-computation-of-femoral-angles-in-dogs-from-three-dimensional-computed-tomography-reconstructions-comparison-with-manual-techniques
#19
F Longo, T Nicetto, T Banzato, G Savio, M Drigo, R Meneghello, G Concheri, M Isola
The aim of this ex vivo study was to test a novel three-dimensional (3D) automated computer-aided design (CAD) method (aCAD) for the computation of femoral angles in dogs from 3D reconstructions of computed tomography (CT) images. The repeatability and reproducibility of three manual radiography, manual CT reconstructions and the aCAD method for the measurement of three femoral angles were evaluated: (1) anatomical lateral distal femoral angle (aLDFA); (2) femoral neck angle (FNA); and (3) femoral torsion angle (FTA)...
February 2018: Veterinary Journal
https://www.readbyqxmd.com/read/29395228/defining-the-medial-lateral-axis-of-the-femur-medical-imaging-conventional-and-functional-calibration-methods-lead-to-differences-in-hip-rotation-kinematics-for-children-with-torsional-deformities
#20
Elyse Passmore, H Kerr Graham, Morgan Sangeux
Hip rotation during gait is a major indicator for femoral derotation osteotomy. However, repeatability of hip rotation is poor because of discrepancies in determining the medial-lateral axis of the femur. Combining 3D gait analysis with medical imaging allows in vivo evaluation of current clinical methods. We used the condylar axis, identified from low dose biplanar radiographs (EOS imaging Inc), as our reference to evaluate conventional, functional calibration and freehand 3D ultrasound methods to define the medial-lateral axis in children with lower-limb torsional deformities...
March 1, 2018: Journal of Biomechanics
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