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femoral torsion

Augusta Whitney Kluk, Tina Zhang, Joseph P Russell, Hyunchul Kim, Adam H Hsieh, Robert V O'Toole
Orthopedic dogma states that external fixator stiffness is improved by placing 1 pin close to the fracture and 1 as distant as possible ("near-far"). This fixator construct is thought to be less expensive than placing pins a shorter distance apart and using "pin-bar" clamps that attach pins to outriggers. The authors therefore hypothesized that the near-far construct is stiffer and less expensive. They compared mechanical stiffness and costs of near-far and pin-bar constructs commonly used for temporary external fixation of femoral shaft fractures...
October 13, 2016: Orthopedics
Gianpaolo Savio, Teresa Baroni, Gianmaria Concheri, Ermenegildo Baroni, Roberto Meneghello, Federico Longo, Maurizio Isola
OBJECTIVE: To define and validate a method for the measurement of 3-dimensional (3D) morphometric parameters in polygonal mesh models of canine femora. STUDY DESIGN: Ex vivo/computerized model. SAMPLE POPULATION: Sixteen femora from 8 medium to large-breed canine cadavers (mean body weight 28.3 kg, mean age 5.3 years). METHODS: Femora were measured with a 3D scanner, obtaining 3D meshes. A computer-aided design-based (CAD) software tool was purposely developed, which allowed automatic calculation of morphometric parameters on a mesh model...
September 26, 2016: Veterinary Surgery: VS
Scott R Small, Sarah E Hensley, Paige L Cook, Rebecca A Stevens, Renee D Rogge, John B Meding, Michael E Berend
BACKGROUND: Short-stemmed femoral components facilitate reduced exposure surgical techniques while preserving native bone. A clinically successful stem should ideally reduce risk for stress shielding while maintaining adequate primary stability for biological fixation. We asked (1) how stem-length changes cortical strain distribution in the proximal femur in a fit-and-fill geometry and (2) if short-stemmed components exhibit primary stability on par with clinically successful designs...
August 10, 2016: Journal of Arthroplasty
Tank Gyaneshwar, Rustagi Nitesh, Tomar Sagar, Kothiyal Pranav, Nitesh Rustagi
PURPOSE: Literature suggests that the lower modulus of elasticity of titanium makes it ideal for use in children compared with stainless steel. Better fracture stability was observed in association with titanium nails on torsional and axial compression testing. However, stainless steel nails are stiffer than titanium counterparts, which may provide a rigid construct when fixing paediatric femoral shaft fractures. Complications have been observed more frequently by various researchers when titanium nails are used for fracture fixation in patients with increasing age or weight...
August 1, 2016: Chinese Journal of Traumatology, Zhonghua Chuang Shang za Zhi
Rishabh Jethanandani, Mahbubul B Patwary, Adam D Shellito, John P Meehan, Derek F Amanatullah
Anterior femoral notching during total knee arthroplasty is a potential risk factor for periprosthetic supracondylar femur fracture. We conducted a study to determine if the design of the femoral implant changes the risk for periprosthetic supracondylar femur fractures after anterior cortical notching. An anterior cortical defect was created in 12 femoral polyurethane models. Six femora were instrumented with cruciate-retaining implants and 6 with posterior-stabilized implants. Each femur was loaded in external rotation along the anatomical axis...
July 2016: American Journal of Orthopedics
Jehill D Parikh, Kieren G Hollingsworth, Dorothy Wallace, Andrew M Blamire, Guy A MacGowan
BACKGROUND: In normal ageing, both vascular and ventricular properties change, and how these affect left ventricular function is not clear. METHODS: 96 subjects (ages 20-79) without cardiovascular disease underwent cardiac magnetic resonance (MR) imaging for measurement of global function, diastolic function (E/A ratio), MR tagging for measurement of torsion to shortening ratio (TSR, ratio of epicardial torsion to endocardial circumferential shortening, with increase in TSR suggesting subendocardial dysfunction relative to the subepicardium), and phase contrast MR imaging measurement of central aortic pulse wave velocity (PWV)...
November 15, 2016: International Journal of Cardiology
Geert Peersman, Kim Taeymans, Christophe Jans, Philippe Vuylsteke, Peter Fennema, Thomas Heyse
INTRODUCTION: Total knee arthroplasty (TKA) is a successful procedure for the management of osteoarthritis (OA) of the knee. Axial plane deformities are more common than suspected in patients presenting with osteoarthritis of the knee joint. Recent research has indicated that torsional deformities could play an important role in the development of anterior knee pain (AKP). METHODS: In a narrative review of the literature, the aetiology of maltorsion deformity of the lower extremity in both, childhood and adulthood, as well as the development of postoperative femoral axial plane deformities are examined...
November 2016: Archives of Orthopaedic and Trauma Surgery
David Hudson
The purpose of this study was to compare the rotational profile of adults with higher versus lower foot progression angles (FPA). Tibial torsion, femoral torsion, hip internal and external rotation and FPA data were collected on one hundred two healthy volunteers. Data were stratified into Low, Mid, and High FPA groups to study relationships among the components of the rotational profile and if there were group differences in the magnitude of torsion angles. Direction of torsion was also studied as an attempt to look at the incidence of offsetting between the tibia and femur...
September 2016: Gait & Posture
Ádám Tibor Schlégl, Ian O'Sullivan, Péter Varga, Péter Than, Csaba Vermes
The aim of this study was to evaluate bone age and its correlation with the lower limbs' developing skeletal anatomy during growth. 1005 children and young adults were evaluated for bone age and 14 different parameters measured on lower-limb reconstructions from radiological examinations carried out with an EOS 2D/3D system in the course of routine orthopedic indicated diagnostic practice. Cervical vertebral morphology evaluation for bone age using the Hassel-Farman method, which describes 6 stages of maturity, was selected...
August 11, 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
Peter Kaiser, René Attal, Mark Kammerer, Michael Thauerer, Lea Hamberger, Raul Mayr, Werner Schmoelz
INTRODUCTION: This study compared the feasibility of six different CT-based measurement techniques for establishing an indication for derotational osteotomy in the cases of patellar instability or femoral fracture. MATERIALS AND METHODS: CT scans of 52 single human cadaver femora were measured using six different torsion measurement techniques (described by Waidelich, Murphy, and Yoshioka on transverse images and Hernandez, Jarrett, and Yoshioka on oblique images)...
September 2016: Archives of Orthopaedic and Trauma Surgery
Lena Hirtler, Sebastian Röhrich, Franz Kainberger
OBJECTIVE: The goals of this study were to test whether age- and sex-dependent variations in the size and shape of the intercondylar notch exist and to define the landmarks and measurements best suited for assessment of the intercondylar notch on MR images. MATERIALS AND METHODS: In this retrospective cross-sectional study, 329 patients were divided into six age groups, and their MR images (3-T coronal T2-weighted fat-suppressed spectral attenuated inversion recovery [SPAIR], sagittal proton density-weighted, axial T2-weighted fat-suppressed SPAIR) were evaluated...
August 4, 2016: AJR. American Journal of Roentgenology
C Putz, S I Wolf, A Geisbüsch, M Niklasch, L Döderlein, T Dreher
BACKGROUND: Internal rotation gait constitutes a complex gait disorder in bilateral spastic cerebral palsy (BSCP) including static torsional and dynamic components resulting in lever arm dysfunction. Although femoral derotation osteotomy (FDO) is a standard procedure to correct increased femoral anteversion in children, unpredictable outcome has been reported. The effect of FDO when it is done as part of single-event multilevel surgery (SEMLS) in adulthood has not been investigated. METHODS: In this study mid-term data of 63 adults with BSCP and internal rotation gait, undergoing SEMLS including FDO were analyzed pre- and 1...
September 2016: Gait & Posture
Bruce A MacWilliams, Mark L McMulkin, Roy B Davis, David E Westberry, Glen O Baird, Peter M Stevens
Torsional deformities of the femur in children may occur as a result of either idiopathic or neuromuscular disorders and may be corrected with derotational osteotomies. Regardless of the underlying etiology, neither the effects of the torsional pathologies nor the alterations resulting from corrective osteotomies are well understood. A study of children with isolated femoral anteversion undergoing a single corrective procedure may assist in understanding the biomechanics of the pathology and the efficacy of surgical correction...
September 2016: Gait & Posture
Michael D DeTora, Randy J Boudrieau
OBJECTIVE: To describe the surgical technique of complex distal femoral deformity correction with the aid of stereolithography apparatus (SLA) biomodels, stabilized with locking plate fixation. METHODS: Full-size replica epoxy bone biomodels of the affected femurs (4 dogs/ 5 limbs) were used as templates for surgical planning. A rehearsal procedure was performed on the biomodels aided by a guide wire technique and stabilized with locking plate fixation. Surgery performed in all dogs was guided by the rehearsal procedure...
September 20, 2016: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
Abir Massaad, Ayman Assi, Ziad Bakouny, Christophe Sauret, Nour Khalil, Wafa Skalli, Ismat Ghanem
Skeletal abnormalities, affecting posture and walking pattern, increase with motor impairment in children with cerebral palsy (CP). However, it is not known whether these skeletal malalignments occur in children with slight motor impairment. Our aim was to evaluate skeletal malalignment at the level of the pelvis and lower limbs in ambulant children with CP, with slight motor impairment, using a low dose biplanar X-ray technique. Twenty-seven children with spastic CP (mean age: 10.9±4years, 7 Hemiplegia, 20 Diplegia, GMFCS levels I:17, II:10), with no previous treatments at the hips and knees, underwent EOS(®) biplanar X-rays...
September 2016: Gait & Posture
Scott A Christopher, Stanley E Kim, Simon Roe, Antonio Pozzi
Periprosthetic femoral fractures are a common complication associated with cementless press-fit total hip arthroplasty. The use of prophylactic cerclage wire fixation has been advocated to reduce this complication. The objective of this study was to evaluate whether a double loop cerclage wire, used as adjunctive fixation, increased the peak torsional load to failure in femora implanted with press-fit cementless stems. Peak torsional load to failure was compared between femora without adjunctive fixation and femora receiving a 1 mm double loop cerclage wire placed proximally to the lesser trochanter...
August 2016: Veterinary Journal
Matthias G Walcher, Karlmeinrad Giesinger, Ryan du Sart, Robert E Day, Markus S Kuster
BACKGROUND: Angular stable plate fixation is a widely accepted treatment option for interprosthetic or periprosthetic femoral fractures with stable implants. This biomechanical study tries to establish a safe distance of the plate from the tip of a femoral prosthesis. METHODS: A total of 38 composite femurs were reamed to an inner diameter of 23 mm to create an osteoporotic bone model. A Weber hip stem was cemented into each and a distal femoral NCB plate applied with the distance to the stem varying from 8 cm apart to 6 cm overlap in 2-cm steps...
June 3, 2016: Journal of Arthroplasty
Chun-Lin Zhang, Guo-Qi Shen, Kun-Peng Zhu, Dong-Xu Liu
BACKGROUND: The integrity of bone-cement interface is very important for the stabilization and long-term sustain of cemented prosthesis. Variations in the bone-cement interface morphology may affect the mechanical response of the shape-closed interlock. METHODS: Self-developed new reamer was used to process fresh pig reamed femoral canal, creating cortical grooves in the canal wall of experimental group. The biomechanical effects of varying the morphology with grooves of the bone-cement interface were investigated using finite element analysis (FEA) and validated using companion experimental data...
2016: Journal of Orthopaedic Surgery and Research
J Knafo, T Thelen, D Verdier, L Creppy, C Tournier, T Fabre
INTRODUCTION: Rotational malunion is a complication of intramedullary (IM) nailing for femur fractures. Symptoms can appear with 15° or more of axial deformity. None of the currently available measurement methods have a satisfactory reliability/irradiation ratio. The purpose of this study was to study the reproducibility of measuring femoral torsion with an EOS(®) low-dose stereography (LDX) system. HYPOTHESIS: LDX is a reproducible method for measuring post-traumatic femoral torsion...
September 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
A Cebulski-Delebarre, N Boutry, C Szymanski, C Maynou, G Lefebvre, E Amzallag-Bellenger, A Cotten
PURPOSE: The goal of this study was to identify rotational abnormalities of the lower limb in adult patients with primary symptomatic flatfoot. MATERIALS AND METHODS: From September 2009 to May 2012, 24 patients (12 women, 12 men; mean age: 40 years) were prospectively included in the study. Each patient underwent radiographs of the flat foot and weight-bearing upright EOS(®) examination. Three-dimensional reconstructions of the lower extremities were performed with derived measurements (length, hip and knee parameters, rotations)...
June 13, 2016: Diagnostic and Interventional Imaging
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