keyword
MENU ▼
Read by QxMD icon Read
search

femoral torsion

keyword
https://www.readbyqxmd.com/read/28630736/abnormal-femoral-antetorsion-a-subtrochanteric-deformity
#1
Guy Waisbrod, Florian Schiebel, Martin Beck
Femoral rotational malalignment is associated with pain and functional disability and may be a contributing factor to hip impingement as well as to instability. In general, the deformity can be addressed surgically by rotational osteotomy. However, the anatomic location of the deformity is debated. The goal of the present study was to narrow down the anatomic site of deformity using the lesser trochanter (LT) as an additional landmark. One hundred and eight patients underwent computer tomography (CT)-based rotational analysis of their lower extremities...
July 2017: Journal of Hip Preservation Surgery
https://www.readbyqxmd.com/read/28628800/increased-internal-femoral-torsion-can-be-regarded-as-a-risk-factor-for-patellar-instability-a-biomechanical-study
#2
Peter Kaiser, Werner Schmoelz, Philip Schoettle, Marit Zwierzina, Christian Heinrichs, Rene Attal
BACKGROUND: Increased internal femoral torsion is regarded as a risk factor for patellar instability. Biomechanical investigations confirming this hypothesis are missing. METHODS: Eight fresh-frozen cadaver knees were tested on a specially designed simulator. Patellar motion and patellofemoral pressure were evaluated for 0°, 10°, and 20° of increased internal and external femoral torsion with native and with transected medial patellofemoral ligaments used to simulate patellar instability...
June 10, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28624013/femoral-torsion-assessment-with-mri-in-children-should-we-use-the-bony-or-cartilaginous-contours
#3
Andrea B Rosskopf, Christoph A Agten, Leonhard E Ramseier, Christian W A Pfirrmann, Florian M Buck
OBJECTIVE: To assess whether the use of cartilaginous contours at the femoral condyles instead of bony contours significantly changes femoral torsion measurements in children. MATERIALS AND METHODS: Femoral torsion was measured in 32 girls (mean age 10.1 years±2.3 standard deviation) and 42 boys (10.9 years±2.5) on axial magnetic resonance (MR) images by two independent readers (R1,R2). The femoral condyle angle was measured using each the cartilaginous and bony contours of the distal femur...
July 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28589313/effect-of-a-collar-on-subsidence-and-local-micromotion-of-cementless-femoral-stems-in-vitro-comparative-study-based-on-micro-computerised-tomography
#4
Valérie Malfroy Camine, Hannes A Rüdiger, Dominique P Pioletti, Alexandre Terrier
PURPOSE: The aim of this study is to quantitatively compare the difference in primary stability between collarless and collared versions of the same femoral stem. Specifically, we tested differences in subsidence and micromotion. METHODS: Collarless and collared versions of the same cementless femoral stem were implanted in two groups of six fresh-frozen cadaveric femurs. Each implanted femur was then subsequently tested for axial compressive and torsional loadings...
June 7, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28570094/femoral-torsion-impact-of-femur-position-on-ct-and-stereoradiography-measurements
#5
Gérard Morvan, Henri Guerini, Grégory Carré, Valérie Vuillemin
OBJECTIVE: The purpose of this study is to evaluate stereoradiographic measurements of femoral torsion with different femoral positions, in comparison with CT measurements, with use of the current standard axial-slice technique. We hypothesize that CT measurements vary with femoral spatial positioning because of the resulting projection onto the CT plane, whereas stereoradiographic measurements, which are derived from a 3D reconstruction of the femur, remain constant. MATERIALS AND METHODS: Both in vitro and in vivo studies were conducted...
June 1, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28547676/femoral-malrotation-after-surgical-treatment-of-femoral-shaft-fractures-in-children-a-retrospective-ct-based-analysis
#6
Christian Zeckey, Fergal Monsell, Mark Jackson, Philipp Mommsen, Musa Citak, Christian Krettek, Mohamed Omar
BACKGROUND: Rotational malalignment is an important and not always avoidable complication after surgical treatment of femoral shaft fractures. The purpose of this study was to determine the incidence of rotational malalignment in children after surgical treatment of femoral shaft fractures and to identify potential patient- and treatment-related risk factors based on data obtained from CT scans. METHODS: We conducted a retrospective analysis of all patients aged less than 15 years with femoral shaft fractures admitted to our level 1 trauma centre between January 2004 and July 2014...
May 25, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28537994/changes-in-gait-parameters-after-femoral-derotational-osteotomy-in-cerebral-palsy-patients-with-medial-femoral-torsion
#7
Ha Yong Kim, Yong Han Cha, Jae Yong Byun, Young Sub Chun, Won Sik Choy
Medial femoral torsion (MFT) is a common pathologic gait in cerebral palsy (CP) children that can be corrected by femoral derotational osteotomy (FDO). It is not clearly known as to how much various gait parameters change after FDO. The aim of this study was to quantify changes in gait parameters after FDO. The study group included 19 young CP patients (28 limbs, age<20 years, average age: 13.2 years) with symptomatic MFT, treated with distal FDO. The study group was divided into two groups: the unilateral FDO group (UG) and the bilateral FDO group (BG)...
May 19, 2017: Journal of Pediatric Orthopedics. Part B
https://www.readbyqxmd.com/read/28474728/pelvic-limb-alignment-measured-by-computed-tomography-in-purebred-english-bulldogs-with-medial-patellar-luxation
#8
Filippo Lusetti, Andrea Bonardi, Chadi Eid, Anna Brandstetter De Bellesini, Filippo Maria Martini
OBJECTIVES: The aim of the study was to describe the differences in pelvic limb alignment between healthy purebred English Bulldogs and those with medial patellar luxation through the measurement of femoral and tibial angles on computed tomography images in multiplanar reconstruction modality (MPR-CT). METHODS: Twenty-one purebred English Bulldogs were included and divided into two groups: one including healthy dogs (15 limbs) and the other including those with medial patellar luxation (24 limbs)...
May 5, 2017: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/28471818/spectrum-of-diagnosis-and-disposition-of-patients-referred-to-a-pediatric-orthopaedic-center-for-a-diagnosis-of-intoeing
#9
Shawne Faulks, Kaitlyn Brown, John G Birch
BACKGROUND: Orthopaedic surgeons frequently evaluate otherwise healthy children for concern of intoed gait. Intoeing in otherwise healthy young children due to metatarsus adductus, internal tibial torsion, and increased femoral anteversion do not typically require orthopaedic treatment. This study reviewed the actual diagnosis, management, and disposition of patients referred to a pediatric orthopaedic specialty hospital for a diagnosis of intoeing; the efficacy of an Advanced Practice Provider (APP) assessment program to screen and triage patients with a primary complaint of intoeing; and parental satisfaction with that program...
May 3, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28373012/prediction-of-damage-formation-in-hip-arthroplasties-by-finite-element-analysis-using-computed-tomography-images
#10
Abdul Halim Abdullah, Mitsugu Todo, Yasuharu Nakashima
Femoral bone fracture is one of the main causes for the failure of hip arthroplasties (HA). Being subjected to abrupt and high impact forces in daily activities may lead to complex loading configuration such as bending and sideway falls. The objective of this study is to predict the risk of femoral bone fractures in total hip arthroplasty (THA) and resurfacing hip arthroplasty (RHA). A computed tomography (CT) based on finite element analysis was conducted to demonstrate damage formation in a three dimensional model of HAs...
March 31, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28331928/computed-tomographic-evaluation-of-femoral-and-tibial-conformation-in-english-staffordshire-bull-terriers-with-and-without-congenital-medial-patellar-luxation
#11
Mark Newman, Katja Voss
OBJECTIVE: To compare hindlimb conformation of English Staffordshire Bull Terriers with and without medial patellar luxation using computed tomography. METHODS: Hindlimb computed tomography (CT) was performed on six English Staffordshire Bull Terriers with grade II or III medial patellar luxation, and six without medial patellar luxation. Inclination angle, femoral condyle trochanteric angle, anteversion angle (AA), distal anteversion angle (DAA), proximal anteversion angle (PAA), femoral varus angle (FVA), tibial valgus angle (TVA), and tibial torsion angle (TTA) were measured...
May 22, 2017: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/28330991/limb-flexion-induced-twist-and-associated-intramural-stresses-in-the-human-femoropopliteal-artery
#12
Anastasia Desyatova, William Poulson, Paul Deegan, Carol Lomneth, Andreas Seas, Kaspars Maleckis, Jason MacTaggart, Alexey Kamenskiy
High failure rates of femoropopliteal artery (FPA) interventions are often attributed to severe mechanical deformations that occur with limb movement. Torsion of the FPA likely plays a significant role, but is poorly characterized and the associated intramural stresses are currently unknown. FPA torsion in the walking, sitting and gardening postures was characterized in n = 28 in situ FPAs using intra-arterial markers. Principal mechanical stresses and strains were quantified in the superficial femoral artery (SFA), adductor hiatus segment (AH) and the popliteal artery (PA) using analytical modelling...
March 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28318949/wing-augmentation-reduces-femoral-head-cutting-out-of-dynamic-hip-screw
#13
Chih-Yu Chen, Shu-Wei Huang, Jui-Sheng Sun, Shin-Yiing Lin, Chih-Sheng Yu, Hsu-Pin Pan, Ping-Hung Lin, Fan-Chun Hsieh, Yang-Hwei Tsuang, Feng-Huei Lin, Rong-Sen Yang, Cheng-Kung Cheng
The dynamic hip screw (DHS) is commonly used in the treatment of femoral intertrochanteric fracture with high satisfactory results. However, post-operative failure does occur and result in poor prognosis. The most common failure is femoral head varus collapse, followed by lag screw cut-out through the femoral head. In this study, a novel-designed DHS with two supplemental horizontal blades was used to improve the fixation stability. In this study, nine convention DHS and 9 Orthopaedic Device Research Center (ODRC) DHSs were tested in this study...
March 17, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28295123/new-proximal-femoral-compaction-blade-provides-strong-antirotation-stability-of-the-femoral-head
#14
Shinya Hayashi, Yukiaki Hirata, Daiki Okamoto, Satoshi Kakunai, Shingo Hashimoto, Koji Takayama, Tomoyuki Matsumoto, Takahiro Niikura, Takaaki Fujishiro, Takafumi Hiranaka, Kotaro Nishida, Ryosuke Kuroda
This study investigated the mechanical properties of a new rectangular compaction blade and compared this blade with other types of nail. Three types of nail were tested: the Magnum lag screw (Robert Reid Inc, Tokyo, Japan), proximal femoral nail, and Magnum Fid blade (Robert Reid Inc). The nails were inserted into solid rigid polyurethane foam, and the torsional moments were loaded with an Instron testing machine (Instron, Kanagawa, Japan). The force curve was recorded, and the average maximum torque was calculated from this curve...
May 1, 2017: Orthopedics
https://www.readbyqxmd.com/read/28283706/three-dimensional-analysis-of-the-proximal-anterior-femoral-flare-and-torsion-anatomic-bases-for-metaphyseally-fixed-short-stems-design
#15
Elhadi Sariali, Yohan Knaffo
PURPOSE: The use of femoral stems with a short metaphyseal fixation may lead to fractures or subsidence. Such failures may be related to a mismatch between the torsions or the sagittal flares of the stem and the femur. The goal of our study was to perform a 3D analysis of the proximal metaphyseal femur anatomy with a special focus on the anterior proximal flare and torsion. Such data may help to detect the outlier patients for whom a short metaphyseal fixation should be avoided. METHODS: A prospective study included 80 consecutive patients who underwent a primary cementless THA with a 3D CT-scan based pre-operative planning...
March 10, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28244927/accuracy-and-reliability-of-computed-tomography-and-magnetic-resonance-imaging-compared-with-true-anatomic-femoral-version
#16
Michael J Beebe, James D Wylie, Bill G Bodine, Ashley L Kapron, Travis G Maak, Omer Mei-Dan, Stephen K Aoki
BACKGROUND: Abnormal torsion of the femur is correlated to lower extremity pathologies. Although computed tomography (CT) scan is the gold standard torsional measurement, magnetic resonance imaging (MRI) is proposed as a viable alternative. Our aim was to determine the accuracy and consistency of MRI and CT femur rotational studies based on 4 described protocols. METHODS: Twelve cadaveric femora were stripped of soft tissue before imaging and physical assessment of torsion...
June 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28216751/femoral-bowing-plane-adaptation-to-femoral-anteversion
#17
Alp Akman, Fahir Demirkan, Nuran Sabir, Murat Oto, Cagdas Yorukoglu, Esat Kiter
BACKGROUND: Femoral bowing plane (FBP) is the unattended subject in the literature. More over the femoral shaft with its bowing is neglected in established anteversion determination methods. There is limited information about the relationship between FBP and anteversion. Thus we focused on this subject and hypothesized that there could be an adaptation of FBP to anteversion. MATERIALS AND METHODS: FBP is determined on three-dimensional solid models derived from the left femoral computerized tomography data of 47 patients which were taken before for another reason and comparatively evaluated with anteversion...
January 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/28209401/the-effect-of-prophylactic-cerclage-wires-in-primary-total-hip-arthroplasty-a-biomechanical-study
#18
Andrew C Waligora, John R Owen, Jennifer S Wayne, Shane R Hess, Gregory J Golladay, William A Jiranek
BACKGROUND: Despite literature to support the use of various cerclage techniques to address intraoperative femoral fractures in total hip arthroplasty, there are limited data to support prophylactic cerclage wiring of the femur during cementless implant placement. This study aims to evaluate the effect of prophylactic calcar cerclage wires on the biomechanical parameters required to produce periprosthetic femoral fractures and on the morphology of these fracture patterns in stable cementless femoral implants...
January 21, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28181695/later-age-at-onset-of-independent-walking-is-associated-with-lower-bone-strength-at-fracture-prone-sites-in-older-men
#19
Alex Ireland, Stella Muthuri, Joern Rittweger, Judith E Adams, Kate A Ward, Diana Kuh, Rachel Cooper
Later age at onset of independent walking is associated with lower leg bone strength in childhood and adolescence. However, it is unknown whether these associations persist into older age or whether they are evident at axial (central) or upper limb sites. Therefore, we examined walking age obtained at age 2 years and bone outcomes obtained by dual-energy X-ray absorptiometry (DXA) and peripheral quantitative computed tomography (pQCT) scans at ages 60 to 64 years in a nationally representative cohort study of British people, the MRC National Survey of Health and Development...
June 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28161898/the-relationship-between-loading-history-and-proximal-femoral-diaphysis-cross-sectional-geometry
#20
Sirpa Niinimäki, Nathaniel Narra, Laura Härkönen, Shinya Abe, Riku Nikander, Jari Hyttinen, Christopher Knüsel, Harri Sievänen
OBJECTIVES: We investigated the relationship between loading history and bone biomechanical properties used in physical activity reconstructions. These bone properties included bone bending and torsional strength (J), cortical area (CA), the direction of the major axis (theta angle), and element shape ratios determined from cross sections of standardized bone length. In addition, we explored the applicability of anatomically determined cross sections. METHODS: Our material consisted of hip and proximal thigh magnetic resonance images of Finnish female athletes (N = 91) engaged in high-jump, triple-jump, endurance running, swimming, power-lifting, soccer and squash; along with a group of active non-athlete individuals (N = 20)...
February 5, 2017: American Journal of Human Biology: the Official Journal of the Human Biology Council
keyword
keyword
64481
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"