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https://www.readbyqxmd.com/read/29656221/patellar-malalignment-treated-with-modified-knee-extension-training-an-electromyography-study
#1
Chi-Chuan Wu, Mei-Chuan Chen, Po-Yuan Tseng, Chi-Heng Lu, Chiu-Ching Tuan
BACKGROUND: Patellar malalignment (PM) in most patients is ascribed to an imbalance of peripatellar soft tissue tension. RESEARCH QUESTION: Conservative treatment of PM initially with enforced training of the vastus medialis obliquus (VMO) has been widely applied. Non-operative techniques for treatment of PM require continuing development. METHODS: Thirty healthy young adults participated in the study. Two surface electromyography (EMG) electrodes were placed on the skin of the dominant lower thigh in each subject: one on the center of the muscle belly of the VMO and the other on the symmetric location of the vastus lateralis (VL)...
April 6, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29609157/acute-and-mid-term-six-week-effects-of-an-ankle-foot-orthosis-on-biomechanical-parameters-clinical-outcomes-and-physical-activity-in-knee-osteoarthritis-patients-with-varus-malalignment
#2
Maik Sliepen, Elsa Mauricio, Dieter Rosenbaum
BACKGROUND: Knee osteoarthritis (KOA) is a painful disease commonly caused by high loads on the articular cartilage. Orthotic interventions aim to reduce mechanical loading, thereby alleviating pain. Traditional orthotics appear effective, but high drop-out rates have been reported over prolonged periods. RESEARCH QUESTION: The aim of this study was to examine the effect of a novel ankle-foot orthosis (AFO) on gait parameters, physical function and activity of KOA patients...
March 26, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29533282/acute-effects-of-walking-on-the-deformation-of-femoral-articular-cartilage-in-older-adults
#3
Kai-Yu Ho, Jayson McClaren, Skyler Sudweeks
BACKGROUND AND PURPOSE: Although discomfort during walking is a common complaint in individuals with knee osteoarthritis (OA), how an acute bout of walking affects femoral cartilage remains unclear. Current literature has suggested that frontal plane knee malalignment (ie, varus and valgus) is associated with the initiation and/or progression of knee OA. However, the association between knee alignment and femoral cartilage deformation after an acute bout of loading has not yet been investigated...
March 12, 2018: Journal of Geriatric Physical Therapy
https://www.readbyqxmd.com/read/29511818/medial-meniscus-extrusion-increases-with-age-and-bmi-and-is-depending-on-different-loading-conditions
#4
Andrea Achtnich, Wolf Petersen, Lukas Willinger, Andreas Sauter, Michael Rasper, Klaus Wörtler, Andreas B Imhoff, Theresa Diermeier
PURPOSE: Meniscus extrusion has always been described as an indirect sign of meniscus pathology and is associated with a loss of function of the affected meniscus. The current cut-off value of 3 mm displacement is indicated as abnormal and has been determined on magnetic resonance images (MRI) and ultrasound (US). However, it has to be considered that there is no description of the physiological meniscus extrusion in healthy knees depending on age or different weight-bearing conditions...
March 6, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29502519/identifying-prognostic-factors-for-conservative-treatment-outcomes-in-servicemen-with-chronic-exertional-compartment-syndrome-treated-at-a-rehabilitation-center
#5
Mariëtte Z Meulekamp, Peter van der Wurff, Alfred van der Meer, Cees Lucas
BACKGROUND: Chronic exertional compartment syndrome (CECS) is a condition of pain induced by exercise, and it is characterized by muscle swelling and impaired muscle function in the lower leg. Given the diversity in the diagnosis and treatment of CECS, it is desirable to determine variables pertaining to prognosis and recovery. The purpose of this study is to identify prognostic factors for conservative treatment outcomes in servicemen with CECS who were treated at a Military Rehabilitation Center...
November 28, 2017: Military Medical Research
https://www.readbyqxmd.com/read/29476933/short-term-effect-of-a-corrective-exercise-program-on-joint-kinematics-of-the-lower-extremities-during-walking-in-children-with-varus-knee-misalignment-a-randomized-controlled-study
#6
Amir Ali Jafarnezhadgero, Mahdi Majlesi, Hojat Etemadi, D G E Robertson
BACKGROUND: Previous studies have demonstrated increased medial stresses in knee varus alignment. Selecting a suitable treatment strategy for individuals with knee malalignment should be a priority. OBJECTIVES: We aimed to investigate the effects of a 16-week corrective exercise continuum (CEC) program on 3-D joint angles of the dominant and non-dominant lower limbs in children with genu varus during walking. METHODS: Overall, 28 male children with genu varus (age range 9-14 years) volunteered to participate in this study...
February 21, 2018: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/29471154/tibial-component-sizing-and-alignment-of-tkr-components-does-not-significantly-affect-patient-reported-outcome-measures-at-six-months-a-case-series-of-474-participants
#7
Imran Ahmed, Vlad Paraoan, Dveej Bhatt, Bhanu Mishra, Chetan Khatri, Damian Griffin, Andrew Metcalfe, Tim Barlow
OBJECTIVES: Total knee replacement (TKR) is an effective means of alleviating the symptoms of end stage osteoarthritis. However, 20% of patients report dissatisfaction one year post-operatively. Previous literature has demonstrated contradictory evidence regarding the relationship between alignment and tibial component sizing with patient reported outcome measures (PROMs). We aim to investigate the association between alignment of TKR components and effect of tibial component sizing on PROMs...
February 19, 2018: International Journal of Surgery
https://www.readbyqxmd.com/read/29417324/radiological-severity-of-hip-osteoarthritis-in-patients-with-adult-spinal-deformity-the-effect-on-spinopelvic-and-lower-extremity-compensatory-mechanisms
#8
Louis M Day, Edward M DelSole, Bryan M Beaubrun, Peter L Zhou, John Y Moon, Jared C Tishelman, Jonathan M Vigdorchik, Ran Schwarzkopf, Renaud Lafage, Virginie Lafage, Themistocles Protopsaltis, Aaron J Buckland
PURPOSE: Sagittal spinal deformity (SSD) patients utilize pelvic tilt (PT) and their lower extremities in order to compensate for malalignment. This study examines the effect of hip osteoarthritis (OA) on compensatory mechanisms in SSD patients. METHODS: Patients ≥ 18 years with SSD were included for analysis. Spinopelvic, lower extremity, and cervical alignment were assessed on standing full-body stereoradiographs. Hip OA severity was graded by Kellgren-Lawrence scale (0-4)...
February 7, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29409214/posterolateral-plate-fixation-with-talarlock%C3%A2-is-more-stable-than-screw-fixation-in-ankle-arthrodesis-in-a-biomechanical-cadaver-study
#9
N Gutteck, H Martin, T Hanke, J B Matthies, A Heilmann, H Kielstein, G Gradl, K S Delank, D Wohlrab
BACKGROUND: A number of studies report on limitations of the screw arthrodesis in severe malalignment of the hindfoot, neuropathic deformity, poor bone quality and osteoporosis. METHODS: Fourteen anatomically correct polyurethane foam models of the right leg (Sawbones Europe, Malmö, Sweden) and eighteen fresh-frozen human lower leg specimens (9 pairs) were used for the comparative biomechanical testing. RESULTS: The statistical analysis of the stiffness of the fixation developed a significant difference in favor of the plate in all test directions...
February 20, 2017: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/29380010/increases-in-tibial-force-imbalance-but-not-changes-in-tibiofemoral-laxities-are-caused-by-varus-valgus-malalignment-of-the-femoral-component-in-kinematically-aligned-tka
#10
Jeremy Riley, Joshua D Roth, Stephen M Howell, Maury L Hull
PURPOSE: The purposes of this study were to quantify the increase in tibial force imbalance (i.e. magnitude of difference between medial and lateral tibial forces) and changes in laxities caused by 2° and 4° of varus-valgus (V-V) malalignment of the femoral component in kinematically aligned total knee arthroplasty (TKA) and use the results to detemine sensitivities to errors in making the distal femoral resections. Because V-V malalignment would introduce the greatest changes in the alignment of the articular surfaces at 0° flexion, the hypotheses were that the greatest increases in tibial force imbalance would occur at 0° flexion, that primarily V-V laxity would significantly change at this flexion angle, and that the tibial force imbalance would increase and laxities would change in proportion to the degree of V-V malalignment...
January 29, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29342496/-adverse-events-in-the-treatment-of-periprosthetic-fractures-around-the-knee-a-clinical-and-radiological-outcome-analysis
#11
Anna Janine Schreiner, Christoph Gonser, Christoph Ihle, Max Konstantin Zauleck, Tim Klopfer, Fabian Stuby, Ulrich Stöckle, Björn Gunnar Ochs
BACKGROUND: The incidence of periprosthetic fractures associated with total knee arthroplasty (PpFxK) has been reported to be 0.3 - 5.5%. 40% of all cases are related to revision TKA. The most common localisation is the distal femur. Classification is performed according to Rorabeck (RB). RB I - II fractures are usually treated with locked plating and retrograde intramedullary nailing, whereas RB III fractures are an indication for revision arthroplasty using a hinged endoprosthesis...
January 17, 2018: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/29248781/drivers-of-cervical-deformity-have-a-strong-influence-on-achieving-optimal-radiographic-and-clinical-outcomes-at-1-year-after-cervical-deformity-surgery
#12
Peter G Passias, Cole Bortz, Samantha Horn, Frank Segreto, Gregory Poorman, Cyrus Jalai, Alan Daniels, D Kojo Hamilton, Han Jo Kim, Daniel Sciubba, Justin S Smith, Brian Neuman, Christopher Shaffrey, Virginie Lafage, Renaud Lafage, Themistocles Protopsaltis, Christopher Ames, Robert Hart, Gregory Mundis, Robert Eastlack
OBJECTIVE: The primary driver (PD) of cervical malalignment is important in characterizing cervical deformity (CD) and should be included in fusion to achieve alignment and quality-of-life goals. This study aims to define how PDs improve understanding of the mechanisms of CD and assesses the impact of driver region on realignment/outcomes. METHODS: Inclusion: radiographic CD, age >18 years, 1 year follow-up. PD apex was classified by spinal region: cervical, cervicothoracic junction (CTJ), thoracic, or spinopelvic by a panel of spine deformity surgeons...
December 14, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29237432/multiple-drill-hole-osteotomy-in-hand-surgery-description-of-a-novel-application-and-proof-of-feasibility
#13
T Haider, D Geisler, G Thalhammer, J Erhart
BACKGROUND: Malunion of phalangeal and metacarpal bones are often associated with impairment of hand function and pose a challenging task for treating surgeons in most cases. When applicable, corrective osteotomy is the treatment of choice, where the affected bone is cut to correct malalignment using chisels or saws. The use of these instruments is associated with several drawbacks especially in hand surgery. We aimed to determine whether a multiple drill-hole (MDH) osteotomy technique was suitable for performing corrective osteotomies of metacarpal and phalangeal bones...
December 13, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29218364/ultrasound-evaluation-of-stress-injuries-and-physiological-adaptations-in-the-fingers-of-adolescent-competitive-rock-climbers
#14
Kathryn Garcia, Diego Jaramillo, Erika Rubesova
BACKGROUND: The impact of high-intensity, repetitive training on the fingers of adolescent climbers is relatively unknown. OBJECTIVE: To evaluate this effect by ultrasound (US) and to confirm some findings by magnetic resonance imaging (MRI). MATERIALS AND METHODS: The US study was performed in 20 adolescent rock climbers (ages 10-17 years) and 6 non-climbing controls (ages 11-15 years). US was used to examine the third digit of the right hand for differences in thickness of soft tissue, flexor and extensor tendon, volar plate and bony and growth plate adaptations...
March 2018: Pediatric Radiology
https://www.readbyqxmd.com/read/29181558/internal-external-malalignment-of-the-femoral-component-in-kinematically-aligned-total-knee-arthroplasty-increases-tibial-force-imbalance-but-does-not-change-laxities-of-the-tibiofemoral-joint
#15
Jeremy Riley, Joshua D Roth, Stephen M Howell, Maury L Hull
PURPOSE: The purposes of this study were to quantify the increase in tibial force imbalance (i.e. magnitude of difference between medial and lateral tibial forces) and changes in laxities caused by  2° and 4° of internal-external (I-E) malalignment of the femoral component in kinematically aligned total knee arthroplasty. Because I-E malalignment would introduce the greatest changes to the articular surfaces near 90° of flexion, the hypotheses were that the tibial force imbalance would be significantly increased near 90° flexion and that primarily varus-valgus laxity would be affected near 90° flexion...
November 27, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28976431/global-alignment-and-proportion-gap-score-development-and-validation-of-a-new-method-of-analyzing-spinopelvic-alignment-to-predict-mechanical-complications-after-adult-spinal-deformity-surgery
#16
Caglar Yilgor, Nuray Sogunmez, Louis Boissiere, Yasemin Yavuz, Ibrahim Obeid, Frank Kleinstück, Francisco Javier Sánchez Pérez-Grueso, Emre Acaroglu, Sleiman Haddad, Anne F Mannion, Ferran Pellise, Ahmet Alanay
BACKGROUND: The restoration of normal sagittal alignment is a critical goal in adult spinal deformity surgery to achieve favorable outcomes and prevent mechanical complications. Schwab sagittal modifiers have been accepted as targets for appropriate alignment, but addressing these targets does not always prevent high mechanical complication or revision rates. This may be because the linear absolute numerical parameters do not cover the whole pelvic incidence spectrum and the distribution of lordosis, pelvic anteversion, and negative malalignment are not considered as potential causes of failure...
October 4, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28966382/role-of-high-tibial-osteotomy-in-cartilage-regeneration-is-correction-of-malalignment-mandatory-for-success
#17
Matthew Dhanaraj Thambiah, Melvin K L Tan, James H P Hui
Malalignment of the knee can cause debilitating symptoms such as pain, resulting in a decline in function and mobility. Surgical options that exist to address this problem include realignment osteotomies and joint replacements. Realignment osteotomies are the more appropriate options in certain patient populations, especially with regard to age and level of activity. Since a high tibial osteotomy (HTO) was first used to manage malalignment of the knee and osteoarthritis, different techniques involving the use of specialized implants have been developed and further refined to good effect...
September 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/28951637/dynamic-locked-plating-for-fixation-of-distal-femur-fractures-using-near-cortical-over-drilling-preliminary-results-of-a-prospective-observational-study
#18
Sherif Galal
INTRODUCTION: Nonunion after locked plating of distal femur fractures is not uncommon. Authors wanted to assess if "Dynamic" locked plating using near-cortex over-Drilling technique would provide a mechanical environment the promotes callus formation, thereby avoiding non-union encountered when applying locked plates with the conventional method. METHODS: This study was conducted at an academic Level 1 Trauma Center. This is a prospective study conducted from November 2015 to November 2016...
July 2017: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/28950349/primary-drivers-of-adult-cervical-deformity-prevalence-variations-in-presentation-and-effect-of-surgical-treatment-strategies-on-early-postoperative-alignment
#19
Peter G Passias, Cyrus M Jalai, Virginie Lafage, Renaud Lafage, Themistocles Protopsaltis, Subaraman Ramchandran, Samantha R Horn, Gregory W Poorman, Munish Gupta, Robert A Hart, Vedat Deviren, Alexandra Soroceanu, Justin S Smith, Frank Schwab, Christopher I Shaffrey, Christopher P Ames
BACKGROUND: Primary drivers (PDs) of adult cervical deformity (ACD) have not been described in relation to pre- and early postoperative alignment or degree of correction. OBJECTIVE: To define the PDs of ACD to understand the impact of driver region on global postoperative compensatory mechanisms. METHODS: Primary cervical deformity driver/vertebral apex level were determined: CS = cervical; CTJ = cervicothoracic junction; TH = thoracic; SP = spinopelvic...
August 5, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28949763/characterizing-constraining-forces-in-the-alignment-phase-of-orthodontic-treatment
#20
Christopher G Gibson, Feng-Chang Lin, Ceib Phillips, Alex Edelman, Ching-Chang Ko
OBJECTIVES: To describe the frictional forces (FF) that constrain wire sliding in the initial alignment phase of treatment using a new term, the "constraining force" (CF), and to hypothesize that CF is dependent on two factors: the hyperelastic behavior of archwires and the specific type of tooth geometric malalignment present. MATERIALS AND METHODS: A laboratory device that simulates the four distinct malalignment types (in-out, rotation, tipping, and vertical step) was used to couple with an Instron testing apparatus...
January 2018: Angle Orthodontist
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