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https://www.readbyqxmd.com/read/28437491/correct-positioning-of-the-medial-patellofemoral-ligament-troubleshooting-in-the-operating-room
#1
M Tyrrell Burrus, Brian C Werner, Jourdan M Cancienne, David R Diduch
Medial patellofemoral ligament (MPFL) reconstruction is often required after failed nonoperative management of lateral patellar instability. It is important to properly re-create the native ligament to avoid altering patellofemoral biomechanics. Such alterations can cause knee stiffness, anterior knee pain, and patellofemoral chondrosis. Incorrect femoral location is the most common mistake that affects MPFL graft biomechanics. Authors have described multiple radiographic and anatomical landmarks that assist in determining the appropriate location, and time should be taken to accurately localize this position...
March 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28435557/internal-fixation-of-transverse-patella-fractures-using-cannulated-cancellous-screws-with-anterior-tension-band-wiring
#2
I Khan, M Y Dar, S Rashid, M F Butt
Aims: To evaluate the effectiveness and safety of anterior tension band wiring technique using two cannulated cancellous screws in patients with transverse (AO34-C1) or transverse with mildly comminuted (AO34-C2) patellar fractures. Materials and Methods: This is a prospective study of 25 patients with transverse fracture or transverse fracture with mildly comminuted patella fractures. All the patients were treated with open reduction and internal fixation using two parallel cannulated screws and 18G stainless steel wire as per the tension band principle...
July 2016: Malaysian Orthopaedic Journal
https://www.readbyqxmd.com/read/28426917/internet-cognitive-behaviour-therapy-for-depression-in-older-adults-with-knee-osteoarthritis-a-randomized-controlled-trial
#3
Kathleen A O'Moore, Jill M Newby, Gavin Andrews, David J Hunter, Kim Bennell, Jessica Smith, Alishia D Williams
Objective To determine the efficacy of an internet-based cognitive behavioural therapy (iCBT) program for depression in older adults with osteoarthritis of the knee and comorbid major depressive disorder (MDD). We conducted a RCT in sixty-nine adults (≥ 50 years) meeting criteria for MDD and osteoarthritis of the knee with 1-week post intervention (week 11) and 3-month follow-up (week 24) end points. Patients were allocated to either a 10-week iCBT program for depression added to treatment as usual (TAU) or to a TAU control group...
April 20, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/28424860/influence-of-tibial-hybrid-fixation-on-graft-tension-and-stability-in-acl-double-bundle-reconstruction
#4
B H Drews, A Seitz, J Huth, G Bauer, A Ignatius, L Dürselen
PURPOSE: Initial graft tension in anterior cruciate ligament (ACL) reconstruction affects stability and tension loss at follow-up. This study investigated the influence of hybrid tibial fixation in 3-tunnel double-bundle ACL reconstruction on initial graft tension and tension change and stability under anterior and combined rotatory loads. METHODS: Eleven fresh-frozen cadaveric knees were reconstructed with an ACL double bundle using a 3-tunnel technique. Grafts were tightened to 80 N in 60° (AM bundle) and 15° (PL bundle) of flexion...
April 19, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28422623/knee-stiffness-and-viscosity-new-implementation-and-perspectives-in-prosthesis-development
#5
Klemen Bohinc, Nejc Vantur, Drago Torkar, Tomaž Lampe, Marija Hribernik, Miroljub Jakovljević
The pendulum test is a method applied to measure passive resistance of the knee. A new and simple pendulum test with instrumentation based on infrared camera was used to evaluate knee stiffness and viscosity on a female human cadaver. The stiffness and viscosity were calculated based on the kinetic data. During the measurements, the periarticular and intraarticular soft tissue of the knee was gradually removed to determine the stiffness and viscosity as a function of the tissue removal rate. The measurements showed that the removal of tissue around the joint reduces the damping of leg oscillation, and therefore decreases the stiffness and viscosity...
April 19, 2017: Bosnian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28421358/vitamin-d-supplementation-for-the-management-of-knee-osteoarthritis-a-systematic-review-of-randomized-controlled-trials
#6
Salman Hussain, Ambrish Singh, Mohd Akhtar, Abul Kalam Najmi
Conflicting evidence exists concerning the supplementation of vitamin D in knee osteoarthritis condition. This systematic literature review was done to explore the effects of vitamin D supplementation in the management of knee osteoarthritis. Electronic literature search was done in databases like PubMed(®), Embase(®), and Cochrane CENTRAL from inception to 6th July 2016. The quality of included Randomized Controlled Trials (RCTs) was assessed using Cochrane risk of bias tool. We considered change in Western Ontario and McMaster Universities (WOMAC) index, Visual Analog Scale (VAS) and Functional Pain Score (FPS) as the primary outcome measure...
April 18, 2017: Rheumatology International
https://www.readbyqxmd.com/read/28413139/evaluation-of-extensor-mechanism-in-revision-knee-arthroplasty
#7
Vadym Zhamilov, Vasfi Karatosun, Serpil Kalkan, Bayram Unver, Izge Gunal
BACKGROUND: The success of revision total knee arthroplasty depends on adequate exposure that does not produce complications. The purpose of this study was to compare the results of revision total knee arthroplasty between V-Y quadricepsplasty (QP) and quadriceps snip (QS) approaches. METHODS: In the study, 92 knees with follow-up of 12-108 months which were operated by using QP (55) and QS (37) were evaluated retrospectively. Measurements were taken by using universal transparent goniometer, also varus valgus deformities, knee flexion angles, instability, Hospital for Special Surgery and Lower Extremity Functional Scale scores, functional condition of the knee and activity levels of the patients were evaluated cross-sectionally...
March 22, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28411549/stability-of-knee-ligament-complex-of-thiel-embalmed-cadaver-compared-to-in-vivo-knee
#8
Florian Völlner, Ulrike Pilsl, Benjamin Craiovan, Florian Zeman, Michael Schneider, Michael Wörner, Joachim Grifka, Markus Weber
BACKGROUND: The first biomechanical evaluation of new implants is usually carried out with cadavers. Fixation of Thiel-embalmed cadavers is supposed to preserve the histological structure, colour and consistency of the tissue and has a low risk of infection and toxicity. However, the biomechanical properties of Thiel-fixated tissue are still unknown. The aim of this study was to quantify the effect of the Thiel-embalming method on the elastic properties of the ligament complex of the knee compared to in vivo knees during total knee arthroplasty...
April 7, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28410094/stiffness-perception-during-active-ankle-and-knee-movement
#9
Alejandro F Azocar, Elliott J Rouse
OBJECTIVE: Recently, human joint impedance-the instantaneous mechanical response to a perturbation-has been quantified during gait, providing new insight beyond the traditional biomechanical descriptions of kinetics and kinematics. However, the role of joint impedance in neuromotor control and the development of exoskeletons and other wearable robotic systems remains unknown. One approach to studying the role of impedance in neuromotor control involves characterizing the human ability to discriminate changes in external impedance properties...
April 6, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28406358/bone-health-in-elite-kenyan-runners
#10
Nicholas Tam, Jordan Santos-Concejero, Ross Tucker, Robert P Lamberts, Lisa K Micklesfield
Impact loading in athletes participating in various sports has been positively associated with increased bone mineral density (BMD), but this has not been investigated in elite Kenyan runners. Body composition and site-specific BMD measures quantified with dual x-ray absorptiometry were measured in 15 elite male Kenyan runners and 23 apparently healthy South African males of different ethnicities. Training load and biomechanical variables associated with impact loading, such as joint stiffness, were determined in the elite Kenyan runners...
April 13, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28404609/moxibustion-versus-diclofenac-sodium-gel-for-the-treatment-of-knee-osteoarthritis-a-study-protocol-for-a-double-blinded-double-placebo-randomised-controlled-trial
#11
Jian-Ying Zhou, Ling Luo, Lin-Lin Zhu, Hai-Yan Yin, Qiaofeng Wu, Jia-Xi Peng, Cheng-Shun Zhang, Peng Lv, Yong Tang, Shu-Guang Yu
INTRODUCTION: Knee osteoarthritis is a common form of arthritis in elderly patients that is characterised by pain and functional limitation. Moxibustion has been employed to relieve chronic pain as an alternative therapy for knee osteoarthritis. However, the evidence of its efficacy is equivocal due to the low methodological quality in most clinical studies. Therefore, we are performing a double-blinded, double-placebo, randomised controlled trial to evaluate the efficacy of moxibustion in participants with knee osteoarthritis...
April 12, 2017: BMJ Open
https://www.readbyqxmd.com/read/28400873/good-early-results-obtained-with-a-guided-motion-implant-for-total-knee-arthroplasty-a-consecutive-case-series
#12
Hagen Hommel, Kai Wilke
BACKGROUND: Previous studies have shown a high incidence of complications with a bi-cruciate stabilized (BCS) guided-motion total knee arthroplasty (TKA) design, which led to recent modifications of the design by the manufacturer. OBJECTIVE: The current study was undertaken to assess whether the use of this TKA system with an extension-first surgical technique is associated with a similar rate of short-term adverse outcome as reported in literature. MATERIAL AND METHODS: This retrospective study enrolled 257 consecutive patients (257 knees) undergoing TKA for osteoarthritis of the knee, with the first 153 receiving cemented Journey BCS I implants and the remaining 104 receiving cemented Journey BCS II implants when these became available...
2017: Open Orthopaedics Journal
https://www.readbyqxmd.com/read/28400872/surgical-release-of-severe-flexion-contracture-for-oncologic-knee-arthroplasty
#13
Vincent Y Ng, Philip Louie, Stephanie Punt, Ernest U Conrad
BACKGROUND: Severe postoperative knee contractures after arthroplasty or megaprosthesis reconstruction occur rarely, but are devastating complications. Management of preoperative flexion contractures is well-described, but there is a paucity of literature for surgical treatment of postoperative contractures. A retrospective chart review was performed for a single surgeon of cases between 1996 and 2014. RESULTS: Nine patients (5 of 66 for pediatrics; 4 of 95 for adults) underwent surgical release for severe stiffness after implantation of knee megaprosthesis...
2017: Open Orthopaedics Journal
https://www.readbyqxmd.com/read/28400868/use-of-saline-as-a-placebo-in-intra-articular-injections-in-osteoarthritis-potential-contributions-to-nociceptive-pain-relief
#14
REVIEW
David Bar-Or, Leonard T Rael, Edward N Brody
BACKGROUND: Osteoarthritis of the knee (OAK) is a severe debilitating condition characterized by joint pain, stiffness, and resultant limited mobility. In recent years, intra-articular (IA) injections have been used to relieve symptoms and have succeeded to varying degrees either with sodium hyaluronate preparations or with a biologic. OBJECTIVE: The objective of this review is to evaluate multiple studies that demonstrate some relief from the symptoms of OAK in the saline arm of various clinical trials...
2017: Open Rheumatology Journal
https://www.readbyqxmd.com/read/28396901/-%C3%A2-biomechanics-of-new-implants-for-hto
#15
D Pape, A Diffo Kaze, A Hoffmann, S Maas
Biomechanical characteristics of 5 tibial osteotomy plates for the treatment of medial knee joint osteoarthritis were examined. Fourth-generation tibial bone composites underwent a medial open-wedge high tibial osteotomy, using TomoFix™ standard, PEEKPower®, ContourLock®, TomoFix™ small stature plates, and iBalance® implants. Static compression load to failure and load-controlled cyclic fatigue failure tests were performed. All plates had sufficient stability up to 2400 N in the static compression load to failure tests...
April 10, 2017: Der Orthopäde
https://www.readbyqxmd.com/read/28394082/changes-in-disability-in-older-adults-with-generalized-radiographic-osteoarthritis-a-complex-relationship-with-physical-activity
#16
E C P M Tak, J B van Meurs, S M A Bierma-Zeinstra, A Hofman, M Hopman-Rock
OBJECTIVE: The aim of the present study was to report on factors associated with changes in disability after 5 years, with a focus on physical activity (PA) in community-dwelling older adults with generalized radiographic osteoarthritis (GROA). METHODS: Assessment of GROA (hand, knee, hip) and disability (Health Assessment Questionnaire) in the Rotterdam Study (cohort RS-1, N = 7,983; with GROA, n = 821). A good outcome at follow-up was defined as improved or mild disability, and a poor outcome as worsened or severe disability...
April 10, 2017: Musculoskeletal Care
https://www.readbyqxmd.com/read/28384527/anterolateral-ligament-reconstruction-with-autologous-grafting-a-biomechanical-study
#17
E Monaco, R M Lanzetti, M Fabbri, A Redler, A De Carli, A Ferretti
BACKGROUND: To evaluate the reliability of the Iliotibial band compared to gracilis tendon as a graft to be used in anterolateral ligament reconstruction. METHODS: Gracilis tendon and a strip of Iliotibial band compared were harvested from 8 fresh human cadaveric knees. The gracilis tendon was prepared to obtain a graft of 10cm in length (Group 1). Iliotibial band compared was prepared to obtain a graft of 10cm in length and 0.5cm in width from the middle portion (Group 2)...
March 31, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28375967/rectus-femoris-transfer-surgery-worsens-crouch-gait-in-children-with-cerebral-palsy-at-gmfcs-levels-iii-and-iv
#18
Ted C Sousa, Alexander Nazareth, Susan A Rethlefsen, Nicole M Mueske, Tishya A L Wren, Robert M Kay
BACKGROUND: Previous study has shown that children with cerebral palsy (CP) functioning at Gross Motor Function Classification System (GMFCS) levels III and IV do not benefit from distal rectus femoris transfer (DRFT) due to lack of improvement in stance knee extension. The fate of knees in such subjects who do not undergo DRFT is unknown. The purpose of this study was to compare knee kinematic outcomes in patients with CP and stiff knee gait who underwent single-event multilevel surgery with and without DRFT...
April 3, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28371740/the-high-cost-of-swing-leg-circumduction-during-human-walking
#19
K Alex Shorter, Amy Wu, Arthur D Kuo
Humans tend to walk economically, with preferred step width and length corresponding to an energetic optimum. In the case of step width, it is costlier to walk with either wider or narrower steps than normally preferred. Wider steps require more mechanical work to redirect the body's motion laterally with each step, but the cost for narrower steps remains unexplained. Here we show that narrow steps are costly because they require the swing leg to be circumducted around the stance leg. Healthy adults (N=8) were tested walking with varying levels of circumduction, induced through lightweight, physical obstructions ("Fins") attached medially to the lower legs, during treadmill walking at fixed speed (1...
March 23, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28365070/clinical-outcome-of-primary-medial-collateral-ligament-posteromedial-corner-repair-with-or-without-staged-anterior-cruciate-ligament-reconstruction
#20
Vivek Pandey, Vikrant Khanna, Sandesh Madi, Anshul Tripathi, Kiran Acharya
INTRODUCTION: Medial collateral ligament (MCL) is a prime valgus stabilizer of the knee, and MCL tears are currently managed conservatively. However, posteromedial corner (PMC) injury along with MCL tear is not same as isolated MCL tear and the former is more serious injury and requires operative attention. However, literature is scarce about the management and outcome of PMC-MCL tear alongside anterior cruciate ligament (ACL) tear. The purpose of this study is to report the clinical outcome of primary repair of MCL and PMC with or without staged ACL reconstruction...
March 22, 2017: Injury
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