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Mechanical axis limbs

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https://www.readbyqxmd.com/read/27925633/shock-wave-enhances-angiogenesis-through-vegfr2-activation-and-recycling
#1
Tien-Hung Huang, Cheuk-Kwan Sun, Yi-Ling Chen, Ching-Jen Wang, Tsung-Cheng Yin, Mel S Lee, Hon-Kan Yip
Although low-energy shock wave (SW) is adopted to treat ischemic diseases because of its pro-angiogenic properties, the underlying mechanism remains unclear. This study aimed at testing whether SW-induced angiogenesis may be through endothelial vascular endothelial growth factor receptor 2 (VEGFR2) signaling and trafficking. Phosphorylation of VEGFR2-Akt-eNOS axis and production of nitric oxide (NO) were determined in human umbilical vein endothelial cells (HUVECs) treated with SW. Carotid artery in ob/ob mice was treated with SW before evaluation with sprouting assay...
December 6, 2016: Molecular Medicine
https://www.readbyqxmd.com/read/27918682/changes-in-the-force-velocity-mechanical-profile-after-short-resistance-training-programmes-differing-in-set-configurations
#2
Eliseo Iglesias-Soler, Miguel Fernández-Del-Olmo, Xián Mayo, Juan Fariñas, Dan Río-Rodríguez, Eduardo Carballeira, Elvis A Carnero, Robert A Standley, Manuel A Giráldez-García, Xurxo Dopico-Calvo, Jose Luis Tuimil
The main aim of this study was to analyse the effect of resistance training programs differing in set configuration on mechanical force-velocity profiles. Thirteen participants performed ten unilateral knee extension training sessions over 5 weeks. Each limb was randomised to one of the following set configurations: traditional (4 sets of 8 repetitions at maximum intended velocity, 10RM load, 3-min pause between sets), and inter-repetition rest (32 maximum intended velocity repetitions, 10RM load, 17.4 s of rest between each repetition)...
December 5, 2016: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/27916684/the-impact-of-obesity-on-compensatory-mechanisms-in-response-to-progressive-sagittal-malalignment
#3
Cyrus M Jalai, Bassel G Diebo, Dana L Cruz, Gregory W Poorman, Shaleen Vira, Aaron J Buckland, Renaud Lafage, Shay Bess, Thomas J Errico, Virginie Lafage, Peter G Passias
BACKGROUND CONTEXT: Obesity's impact on standing sagittal alignment remains poorly understood, especially with respect to the role of the lower-limbs. Given energetic expenditure in standing, a complete understanding of compensation in obese patients with sagittal malalignment remains relevant. PURPOSE: This study compares obese and non-obese patients with progressive sagittal malalignment for differences in recruitment of pelvic and lower limb mechanisms. STUDY DESIGN/SETTING: Single center retrospective review...
December 1, 2016: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/27894175/comparison-of-cable-method-and-miniaci-method-using-picture-archiving-and-communication-system-in-preoperative-planning-for-open-wedge-high-tibial-osteotomy
#4
Seong-Dae Yoon, GuoFeng Zhang, Hee-June Kim, Byoung-Joo Lee, Hee-Soo Kyung
Purpose: The purpose was to compare the accuracy of Miniaci method using picture archiving and communication system (PACS) with a cable method in high tibial osteotomy (HTO). Materials and Methods: This study analyzed 47 patients (52 knees) with varus deformity and medial osteoarthritis. From 2007 to 2013, patients underwent HTO using either a cable method (20 knees) or Miniaci method based on a PACS image (32 knees). In the cable method, the 62.5% point of the mediolateral tibial plateau width was located using an electrocautery cord under fluoroscopy (cable group)...
December 1, 2016: Knee Surgery & related Research
https://www.readbyqxmd.com/read/27858886/fixator-assisted-tibial-lengthening-over-a-plate-in-a-patient-with-sequelae-of-poliomyelitis
#5
Haci Bayram Tosun, Sancar Serbest, Abuzer Uludag, Seyitali Gumustas, Suat Celik
There are many techniques for limb lengthening. Lengthening over a plate is an alternative choice of fixation in children or when nailing is difficult. We present a new technique for tibial lengthening with using a monolateral external fixator over a lengthening plate.Lengthening over an intramedullary nail is a commonly used method in patients with short stature or limb-length discrepancy. However, in patients with a narrow and excessively sclerotic intramedullary cavity in the pediatric age group where the skeletal system has not yet fully developed, difficulties have been observed in lengthening methods with nailing...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27857500/inter-observer-variability-and-its-correlation-to-experience-in-measurement-of-lower-limb-mechanical-axis-on-long-leg-radiographs
#6
Raju Vaishya, Vipul Vijay, Vikas P Birla, Amit Kumar Agarwal
INTRODUCTION: Restoration of mechanical axis (MA) is one of the most important aims of treatment of knee arthritis. The measurement of MA is often done on hip knee ankle (HKA) radiographs (LLR), but its measurement is often difficult and variable. We studied to check if inter-observer variability in the measurement of MA is dependent on the experience of the observer. MATERIALS AND METHODS: 48 patients (70 knees) underwent measurement of MA on HKA radiographs. The measurement was done by five observers of different experience...
October 2016: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/27823847/accuracy-of-mri-based-vs-ct-based-patient-specific-instrumentation-in-total-knee-arthroplasty-a-meta-analysis
#7
Vincent V G An, Brahman S Sivakumar, Kevin Phan, Yadin David Levy, Warwick J M Bruce
INTRODUCTION: The technical objective of total knee arthroplasty (TKA) is to restore normal mechanical parameters to the knee. Patient-specific instrumentation (PSI) was developed to streamline the operative process and improve accuracy. PSI produces individualized cutting guides based on three-dimensional models of the patient's anatomy acquired from computed-tomography (CT) or magnetic-resonance imaging (MRI). However, the superiority of one modality over the other remains unclear. Therefore, we aimed to compare the accuracy of patient-specific cutting guides produced from MRI or CT imaging methods in TKA...
November 4, 2016: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/27817976/return-to-sport-activity-after-anterior-cruciate-ligament-reconstruction-in-skeletally-immature-athletes-with-manual-drilling-original-all-inside-reconstruction-at-8-years-follow-up
#8
Giacomo Placella, Matteo Bartoli, Marco Peruzzi, Andrea Speziali, Valerio Pace, Giuliano Cerulli
OBJECTIVE: Anterior cruciate ligament (ACL) tears are common injuries in adolescent athletes, especially in those who bear high stress on their knees due to shearing forces. The goal of the surgical procedures in skeletally immature patients is to restore joint stability avoiding the adverse effects on the growth process. The aim of this study was to verify the return of the skeletally immature professional athletes to sports in the long-term, following ACL reconstruction with the original all-inside technique and with manual drilling...
November 3, 2016: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/27794622/mobile-bearing-medial-unicompartmental-knee-arthroplasty-restores-limb-alignment-comparable-to-that-of-the-unaffected-contralateral-limb
#9
Arun B Mullaji, Siddharth Shah, Gautam M Shetty
Background and purpose - Medial unicompartmental knee arthroplasty (UKA) is undertaken in patients with a passively correctable varus deformity. We investigated whether restoration of natural soft tissue tension would result in a lower limb alignment similar to that of the contralateral unaffected lower limb after mobile-bearing medial UKA. Patients and methods - In this retrospective study, hip-knee-ankle (HKA) angle, position of the weight-bearing axis (WBA), and knee joint line obliquity (KJLO) after mobile-bearing medial UKA was compared with that of the unaffected (clinically and radiologically) contralateral lower limb in 123 patients...
October 31, 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27779156/preoperative-measurement-of-tibial-resection-in-total-knee-arthroplasty-improves-accuracy-of-postoperative-limb-alignment-restoration
#10
Pei-Hui Wu, Zhi-Qi Zhang, Shu-Ying Fang, Zi-Bo Yang, Yan Kang, Ming Fu, Wei-Ming Liao
BACKGROUND: Accuracy of implant placement in total knee arthroplasty (TKA) is crucial. Traditional extramedullary alignment instruments are fairly effective for achieving the desired mean tibial component coronal alignment. We modified the traditional tibial plateau resection technique and evaluated its effect on alignment restoration. METHODS: Two hundred and eighty-two primary TKAs in our hospital between January 2013 and December 2014 were enrolled in this retrospective study...
2016: Chinese Medical Journal
https://www.readbyqxmd.com/read/27776793/how-accurately-does-high-tibial-osteotomy-correct-the-mechanical-axis-of-an-arthritic-varus-knee-a-systematic-review
#11
REVIEW
Maxim Van den Bempt, Wouter Van Genechten, Toon Claes, Steven Claes
BACKGROUND: The aim of this study was to give an overview of the accuracy of coronal limb alignment correction after high tibial osteotomy (HTO) for the arthritic varus knee by performing a systematic review of the literature. METHODS: The databases PubMed, MEDLINE and Cochrane Library were screened for relevant articles. Only prospective clinical studies with the accuracy of alignment correction by performing HTO as primary or secondary objective were included...
December 2016: Knee
https://www.readbyqxmd.com/read/27746585/prosthetic-leg-control-in-the-nullspace-of-human-interaction
#12
Robert D Gregg, Anne E Martin
Recent work has extended the control method of virtual constraints, originally developed for autonomous walking robots, to powered prosthetic legs for lower-limb amputees. Virtual constraints define desired joint patterns as functions of a mechanical phasing variable, which are typically enforced by torque control laws that linearize the output dynamics associated with the virtual constraints. However, the output dynamics of a powered prosthetic leg generally depend on the human interaction forces, which must be measured and canceled by the feedback linearizing control law...
July 2016: Proceedings of the ... American Control Conference
https://www.readbyqxmd.com/read/27741108/guided-growth-for-tibia-vara-blount-s-disease
#13
John A Heflin, Scott Ford, Peter Stevens
Blount's disease is commonly attributed to an intrinsic, idiopathic defect in the posteromedial proximal tibial physis resulting in progressive bowing of the leg, intoeing, and lateral knee thrust. Treatment has historically included bracing, physeal stapling, or corrective osteotomy, and was determined primarily by age at presentation. As we feel the pathology is not necessarily age dependent, we have elected to use the technique of guided growth using a lateral tension band plate to correct limb alignment as a first-line treatment in all patients presenting to our clinic as long as they had growth remaining and no evidence of a physeal bar...
October 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27735063/the-effect-of-sliding-humeral-osteotomy-sho-on-frontal-plane-thoracic-limb-alignment-an-ex-vivo-canine-cadaveric-study
#14
Adam H Breiteneicher, Bo Norby, Kurt S Schulz, Sharon C Kerwin, Don A Hulse, Derek B Fox, W Brian Saunders
OBJECTIVE: To determine the effect of sliding humeral osteotomy (SHO) on frontal plane thoracic limb alignment in standing and recumbent limb positions. STUDY DESIGN: Canine cadaveric study. SAMPLE POPULATION: Canine thoracic limbs (n=15 limb pairs). METHODS: Limbs acquired from healthy Labrador Retrievers euthanatized for reasons unrelated to this study were mounted in a limb press and aligned in a standing position followed by axial loading at 30% body weight...
October 13, 2016: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/27709028/distal-femoral-osteotomy-lateral-opening-wedge-technique
#15
Michael P O'Malley, Ayoosh Pareek, Patrick J Reardon, Michael J Stuart, Aaron J Krych
Coronal limb malalignment is a significant contributor to asymmetric joint wear, gait abnormalities, and the development and progression of degenerative joint disease. Osteotomies about the knee were developed to realign the mechanical axis of the limb to unload the affected compartment. Valgus malalignment is less common than varus malalignment, but can contribute to a variety of clinical conditions, including lateral compartment cartilage defects and arthritis, lateral patellofemoral instability, and medial collateral ligament laxity...
August 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/27667532/intraoperative-fluoroscopic-assessment-of-limb-alignment-is-a-reliable-predictor-for-postoperative-limb-alignment-in-biplanar-medial-opening-wedge-high-tibial-osteotomy
#16
Ki-Mo Jang, Jong-Hee Lee, Il Youp Cho, Bong-Kyung Park, Seung-Beom Han
BACKGROUND: The purpose of this study was to assess the reliability of pre-, intra operative, and postoperative limb alignment measurements and investigate the correlation between the measurements in biplanar medial opening-wedge high tibial osteotomy. METHODS: This study enrolled 59 knees undergoing biplanar opening-wedge high tibial osteotomy for primary medial osteoarthritis with varus deformity. Preoperative and postoperative standing lower leg radiographs and intraoperative fluoroscopic images were taken...
August 27, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/27574955/rebound-of-frontal-plane-malalignment-after-tension-band-plating
#17
Sebastian Farr, Hamza M Alrabai, Elisabeth Meizer, Rudolf Ganger, Christof Radler
BACKGROUND: Despite the popularity of tension band plating (TBP) current literature lacks clinical data concerning recurrence ("rebound") of frontal plane malalignment. This study investigated the rebound phenomenon after TBP in idiopathic genu varum/valgum deformities. We analyzed factors that may contribute to the development of rebound after removal of TBP. METHODS: Patients who had correction of idiopathic valgus or varus deformities by TBP at the distal femoral and/or proximal tibial growth plate were selected from a prospective consecutive database...
August 29, 2016: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/27535554/discrepancy-of-alignment-in-different-weight-bearing-conditions-before-and-after-high-tibial-osteotomy
#18
Joon Ho Wang, Jung Min Shin, Hyun Ho Kim, Seung-Hoon Kang, Byung Hoon Lee
PURPOSE: To evaluate the differences in the amount of varus malalignment and valgus (over) correction in relation to three different weight bearing conditions from whole leg AP radiographs (single-limb (SL) stance, double-limb (DL) stance, supine position (S)) before and after high tibial osteotomy (HTO), and to evaluate which alignment parameters affect the changes for patients in three different weight bearing conditions. METHODS: A total of 40 consecutive patients (43 knees) with varus osteoarthritis underwent navigation assisted open wedge HTO...
August 18, 2016: International Orthopaedics
https://www.readbyqxmd.com/read/27506810/remaining-mild-varus-limb-alignment-leads-to-better-clinical-outcome-in-total-knee-arthroplasty-for-varus-osteoarthritis
#19
Kyohei Nishida, Tomoyuki Matsumoto, Koji Takayama, Kazunari Ishida, Naoki Nakano, Takehiko Matsushita, Ryosuke Kuroda, Masahiro Kurosaka
PURPOSE: Postoperative neutral limb alignment [femorotibial mechanical axis (FTMA) 180° ± 3°] is generally considered to be one of the prerequisites for successful total knee arthroplasty (TKA). However, the influence of residual malalignment on clinical and functional outcomes after TKA is unknown. Therefore, the purpose of this study was to investigate the relationship between postoperative limb alignment and clinical outcomes in Asian patients who underwent primary TKA. METHODS: The study included 220 knees with a mean age of 73...
August 9, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/27504362/an-innovative-method-of-assessing-the-mechanical-axis-deviation-in-the-lower-limb-in-standing-position
#20
Jagannath Kamath, Raja Shekar Danda, Nikil Jayasheelan, Rohit Singh
INTRODUCTION: Various methods of measuring mechanical axis deviation of lower limb have been described including radiographic and CT scanogram, intraoperative fluoroscopy with the use of an electrocautery cord. These methods determine the mechanical axis in a supine, non-weight bearing position. Although long cassette standing radiographic view is used for the purpose but is not available at most centres. A dynamic method of determining the mechanical axis in a weight bearing position was devised in this study...
June 2016: Journal of Clinical and Diagnostic Research: JCDR
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