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https://www.readbyqxmd.com/read/27931954/younger-patients-have-less-severe-radiographic-disease-and-lower-reported-outcome-scores-than-older-patients-undergoing-total-knee-arthroplasty
#1
Jacob Haynes, Adam Sassoon, Denis Nam, Loren Schultz, James Keeney
BACKGROUND: Total knee arthroplasty (TKA) has been successful for many younger patients, but some experience residual symptoms or dissatisfaction. We performed this study to assess the relationship between radiographic disease severity and patient demographic features on patient reported TKA outcome scores. METHODS: We compared 100 TKAs performed for 82 patients ≤55years old with 100 gender-matched TKAs performed for 85 patients between 65 and 75years old. These study cases represented 25% and 21%, respectively, of TKAs performed between January 2006 and June 2011...
December 5, 2016: Knee
https://www.readbyqxmd.com/read/27923627/outcomes-of-cementless-unicompartmental-and-total-knee-arthroplasty-a-systematic-review
#2
REVIEW
Jelle P van der List, Dana L Sheng, Laura J Kleeblad, Harshvardhan Chawla, Andrew D Pearle
BACKGROUND: Aseptic loosening is a common failure mode in cemented unicompartmental knee arthroplasty (UKA) and total knee arthroplasty (TKA). This led to the development of cementless designs but the historical outcomes were poor. Recent developments in cementless designs have improved outcomes, but the current status is unknown. Therefore, a systematic review was performed to assess recent outcomes of cementless knee arthroplasty. METHODS: A search was performed using PubMed, Embase and Cochrane systems and national registries for studies reporting outcomes since 2005...
December 3, 2016: Knee
https://www.readbyqxmd.com/read/27923626/limitations-in-predicting-outcome-following-primary-acl-reconstruction-with-single-bundle-hamstring-autograft-a-systematic-review
#3
REVIEW
Vincent Vg An, Corey Scholes, Vikram A Mhaskar, William Hadden, David Parker
BACKGROUND: Anterior cruciate ligament reconstruction (ACLR) is one of the most well studied and performed procedures in the world. Thus, it would be useful to develop a tool to predict patient outcomes post-operatively to allow clinicians to optimise management. PURPOSE: To identify and summarise factors predictive of graft failure and patient-reported outcome (PROM) measures at minimum two years after ACLR with single-bundle quadruple hamstring autograft via the anteromedial portal technique...
December 3, 2016: Knee
https://www.readbyqxmd.com/read/27923625/verifying-the-equivalence-of-representations-of-the-knee-joint-moment-vector-from-a-drop-vertical-jump-task
#4
LETTER
Julia K Nichols, Oliver M O'Reilly
Biomechanics software programs, such as Visual3D, Nexus, Cortex, and OpenSim, have the capability of generating several distinct component representations for joint moments and forces from motion capture data. These representations include those for orthonormal proximal and distal coordinate systems and a non-orthogonal joint coordinate system. In this article, a method is presented to address the challenging problem of evaluating and verifying the equivalence of these representations. The method accommodates the difficulty that there are two possible sets of non-orthogonal basis vectors that can be used to express a vector in the joint coordinate system and is illuminated using motion capture data from a drop vertical jump task...
December 3, 2016: Knee
https://www.readbyqxmd.com/read/27923624/a-novel-3d-approach-for-determination-of-frontal-and-coronal-plane-tibial-slopes-from-mr-imaging
#5
Amirhesam Amerinatanzi, Rodney Summers, Kaveh Ahmadi, Vijay K Goel, Timothy E Hewett, Edward Nyman
BACKGROUND: The proximal tibia is geometrically complex, asymmetrical, and variable, is heavily implicated in arthrokinematics of the knee joint, and thus a contributor to knee pathologies such as non-contact anterior cruciate ligament injury. Medial, lateral, and coronal tibial slopes are anatomic parameters that may increase predisposition to knee injuries, but the extent to which each contributes has yet to be fully realized. Previously, two-dimensional methods have quantified tibial slopes, but more reliable 3D methods may prove advantageous...
December 3, 2016: Knee
https://www.readbyqxmd.com/read/27923623/staged-total-knee-arthroplasty-for-bilateral-complex-knee-deformities-from-kashin-beck-disease-and-skeletal-dysplasia
#6
Ming Ling, Xueyuan Wu, Yanhai Chang, Xianghui Dong, Zhengming Sun, Li Ling, Shixun Wu, Bo Yang
This study reported two cases of patients with Grade III Kashin-Beck disease (KBD) with skeletal dysplasia concomitant with complex knee deformity and functional limitation treated by staged total knee arthroplasty (TKA). Detailed pre-operative planning, bone resection, and soft tissue balancing in affected knees were performed in the surgeries in this report. The results demonstrated that TKA could correct lower limb alignment, alleviate knee pain, improve function, and provide good quality of life in people with KBD...
December 3, 2016: Knee
https://www.readbyqxmd.com/read/27923622/factors-predicting-quadriceps-femoris-muscle-atrophy-during-the-first-12weeks-following-anterior-cruciate-ligament-reconstruction
#7
T Grapar Žargi, Matej Drobnič, Renata Vauhnik, Jadran Koder, Alan Kacin
BACKGROUND: Factors predicting quadriceps femoris muscle (QF) atrophy during the early period after arthroscopic ACL reconstruction have not been extensively studied. It is also yet to be confirmed whether muscle atrophy is a key determinant of postoperative QF weakness. METHODS: Mean changes in QF volume, MVIC torque and isometric endurance time were analysed in 25 patients prior to and at four and 12 weeks after surgery. A multivariable regression model of change in QF volume was made from combination of several parameters of preoperative QF size and strength and postoperative joint recovery...
December 3, 2016: Knee
https://www.readbyqxmd.com/read/27919673/proximal-tibial-anterior-open-wedge-oblique-osteotomy-a-novel-technique-to-correct-genu-recurvatum
#8
Tae Woo Kim, Sahnghoon Lee, Jung-Ro Yoon, Hyuk-Soo Han, Myung Chul Lee
BACKGROUND: For successful acute correction of genu recurvatum, accurate correction of plateau angle, restoration of anatomical axis, rigid fixation, and preservation of patellar height are essential. However, a surgical treatment that satisfies all these conditions has not yet been established. The purpose of this study was to evaluate the novel technique of proximal tibial anterior open-wedge oblique osteotomy (PT-AOWOO) for the treatment of genu recurvatum. METHODS: Five patients with genu recurvatum underwent PT-AOWOO from 2008 to 2013...
December 2, 2016: Knee
https://www.readbyqxmd.com/read/27919672/a-study-of-pre-operative-presence-of-micro-organisms-in-affected-knee-joints-of-rheumatoid-arthritis-patients-who-need-total-knee-arthroplasty
#9
Jiang-Ming Luo, Lin Guo, Hao Chen, Peng-Fei Yang, Ran Xiong, Yang Peng, Liu Yang
BACKGROUND: To evaluate, by way of intraoperative tissue culture and pathological study, the pre-operative presence of micro-organisms in knee joints of patients with rheumatoid arthritis (RA) who need total knee arthroplasty (TKA). METHODS: From November 2012 to January 2014, 47 patients with RA (53 knees) who needed TKA were included in this study. Patients received routine pre-operative examination and joint fluid routine and culture. Each RA patient was match-paired with one osteoarthritis (OA) patient...
December 2, 2016: Knee
https://www.readbyqxmd.com/read/27919671/supracondylar-femoral-osteotomy-and-knee-joint-replacement-during-the-same-surgical-procedure-in-a-type-a-haemophiliac-patient-with-knee-flexion-deformity-and-ankylosis
#10
Jose Luis Osma Rueda, Alejandra Oliveros Vargas, Cristian David Sosa
BACKGROUND: Haemophilia A is the cause of diverse musculoskeletal disorders such as ankylosis, arthritis and associated angular deformity. There are few reported cases in patients with haemophilia A in which simultaneous supracondylar femoral osteotomy and knee joint replacement has been performed to treat knee angular deformity and ankylosis. Here we present the case of an 18year old male patient, with an evolution of two years, who was unable to walk due to the presence of an untreated supracondylar fracture in the left femur and ipsilateral haemophilic arthropathy which led him to develop an ankylosis in flexion close to 70°...
December 2, 2016: Knee
https://www.readbyqxmd.com/read/27916580/annual-revision-rates-of-partial-versus-total-knee-arthroplasty-a-comparative-meta-analysis
#11
REVIEW
Harshvardhan Chawla, Jelle P van der List, Alexander B Christ, Maximiliano R Sobrero, Hendrik A Zuiderbaan, Andrew D Pearle
BACKGROUND: Utilization of unicompartmental knee arthroplasty (UKA) and patellofemoral arthroplasty (PFA) as alternatives to total knee arthroplasty (TKA) for unicompartmental knee osteoarthritis (OA) has increased. However, no single resource consolidates survivorship data between TKA and partial resurfacing options for each variant of unicompartmental OA. This meta-analysis compared survivorship between TKA and medial UKA (MUKA), lateral UKA (LUKA) and PFA using annual revision rate as a standardized metric...
December 1, 2016: Knee
https://www.readbyqxmd.com/read/27916579/distal-patellar-tendon-avulsion-in-association-with-high-energy-knee-trauma-a-case-series-and-review-of-the-literature
#12
Brian Capogna, Eric Strauss, Sanjit Konda, Alan Dayan, Michael Alaia
BACKGROUND: Patellar tendon rupture is rare in the general population. Typically, failure occurs proximally or at the mid-substance. Distal avulsion from the tibial tubercle in adults is rare and not well described in the orthopedic literature. METHODS: We present the largest series of patients with distal patellar tendon injury with associated multi-ligamentous disruption of the knee. A series of six patients with distal patellar tendon avulsion were identified at a single institution...
December 1, 2016: Knee
https://www.readbyqxmd.com/read/27916578/patellar-component-design-influences-size-selection-and-coverage
#13
Charlie C Yang, Douglas A Dennis, Patrick G Davenport, Raymond H Kim, Todd M Miner, Derek R Johnson, Peter J Laz
BACKGROUND: Patellofemoral (PF) complications following total knee arthroplasty continue to occur. Outcomes are influenced by implant design, size and alignment in addition to patient factors. The objective of this study was to assess the effect of implant design, specifically round versus oval dome patellar components, on size selected and bony coverage in a population of 100 patients. METHODS: Intraoperative assessments of patella component size were performed using surgical guides for round and oval designs...
December 1, 2016: Knee
https://www.readbyqxmd.com/read/27916577/association-of-fibrosis-in-the-infrapatellar-fat-pad-and-degenerative-cartilage-change-of-patellofemoral-joint-after-anterior-cruciate-ligament-reconstruction
#14
Kyoung Ho Yoon, Dae Hyun Tak, Taeg Su Ko, Sang Eon Park, Juhyun Nam, Sang Hak Lee
BACKGROUND: The purpose of this study was to evaluate the prevalence and risk factor of cartilage degeneration of the patellofemoral joint (PFJ) that was diagnosed by second-look arthroscopy. METHODS: One-hundred and seven patients who underwent ACL reconstruction were evaluated by preoperative MRI, postoperative MRI and second-look arthroscopy. Severity of infrapatellar fat pad (IPFP) fibrosis was evaluated by MRI at an average of 26months after ACL reconstruction...
December 1, 2016: Knee
https://www.readbyqxmd.com/read/27916576/extensor-reconstruction-of-the-knee-using-the-fibular-transposition-technique-after-proximal-tibial-resection
#15
Hiroyuki Kawashima, Akira Ogose, Tetsuo Hotta, Takashi Ariizumi, Tetsuro Yamagishi, Naoto Endo
BACKGROUND: Reconstruction of the extensor mechanism after resection of the proximal tibia is challenging, and several surgical procedures are available. The purpose of this study was to determine the outcome of the fibular transposition technique for reconstruction of the extensor mechanism of the knee after proximal tibial resection. METHODS: We retrospectively reviewed five consecutive patients who underwent resection of the proximal tibia with prosthetic reconstruction and reconstruction of the extensor using fibular transposition between 1997 and 2011...
December 1, 2016: Knee
https://www.readbyqxmd.com/read/27914723/evaluation-of-knee-cartilage-thickness-a-comparison-between-ultrasound-and-magnetic-resonance-imaging-methods
#16
Randy J Schmitz, Hsin-Min Wang, Daniel R Polprasert, Robert A Kraft, Brian G Pietrosimone
BACKGROUND: Establishing clinically accessible measures of cartilage health is critical for assessing effectiveness of protocols to reduce risk of osteoarthritis (OA) development and progression. Cartilage thickness is one important measure in describing both OA development and progression. The objective was to determine the relationship between ultrasound and MRI measures of cartilage thickness in the medial femoral condyle. METHODS: Mean cartilage thicknesses of the left medial femoral cartilage were measured via T1 weighted MRI and ultrasound imaging from transverse, anterior, middle, and posterior medial femoral regions in 10 healthy females (Mean±Std Dev) (1...
November 30, 2016: Knee
https://www.readbyqxmd.com/read/27914722/poor-expectations-of-knee-replacement-benefit-are-associated-with-modifiable-psychological-factors-and-influence-the-decision-to-have-surgery-a-cross-sectional-and-longitudinal-study-of-a-community-based-sample
#17
Daniel L Riddle, Gregory J Golladay, Amanda Hayes, Hassan M K Ghomrawi
BACKGROUND: Total knee arthroplasty (TKA) is a highly effective surgery, but is underutilized by some patient groups. This study determined factors associated with a person's expectations with respect to pain and walking function following a TKA procedure, should they elect to undergo a TKA. METHODS: A total of 3542 people were studied with or at risk of knee osteoarthritis and enrolled in the community-based Osteoarthritis Initiative (OAI). Multivariable logistic regression analyses identified demographic, socioeconomic, osteoarthritis-related, joint replacement awareness, and psychological correlates as poor outcome expectations...
November 30, 2016: Knee
https://www.readbyqxmd.com/read/27889320/optimizing-effectivity-of-tranexamic-acid-in-bilateral-knee-arthroplasty-a-prospective-randomized-controlled-study
#18
Rajesh N Maniar, Tushar Singhi, Aniket Patil, Gaurav Kumar, Parul Maniar, Jaivardhan Singh
INTRODUCTION: Tranexamic acid (TEA) is used in reducing surgical blood loss. Literature shows no optimal regimen recommended for Bilateral Total Knee Arthroplasty (TKA). We evaluated three TEA regimens differing in dosage, timing and mode of administration in bilateral TKA to identify the most effective regimen to reduce blood loss. METHODS: We prospectively studied three TEA regimens (25 patients each) as follows: (1) two intraoperative, intravenous doses (IOIO), (2) two intraoperative local applications (LALA), and (3) one preoperative plus two intraoperative, intravenous doses (POIOIO)...
November 23, 2016: Knee
https://www.readbyqxmd.com/read/27887784/endoscopic-debridement-and-fibrin-glue-injection-of-a-chronic-morel-lavall%C3%A3-e-lesion-of-the-knee-in-a-professional-soccer-player-a-case-report-and-literature-review
#19
Baris B Koc, Nicolaas Somorjai, Egid P M Kiesouw, Kurt Vanderdood, Marleen Meesters-Caberg, Frits W Draijer, Edwin J P Jansen
A Morel-Lavallée lesion is a post-traumatic closed degloving injury of soft tissue. The lesion is due to a shearing trauma with separation of subcutaneous tissue from underlying fascia. When conservative treatment fails, surgical treatment is imperative. Commonly, open drainage and debridement is performed. This case report describes a Morel-Lavallée lesion of the knee in a professional soccer player who was successfully treated with endoscopic debridement and fibrin glue injection after failure of conservative management...
November 22, 2016: Knee
https://www.readbyqxmd.com/read/27876420/hereditary-bilateral-genu-recurvatum-case-report-of-a-family
#20
Peter Feczko, Pieter Emans
BACKGROUND: Genu recurvatum is a rare condition in children and adolescents. The origin can be osseous, ligamentous and mixed. METHODS: We describe for the first time a family inclusive two brothers and their mother with hereditary bilateral genu recurvatum of unknown etiology. The possible underlying pathology and treatment are discussed. RESULTS: The underlying pathology of the early closure of the apophysis of the tibial tuberosity remained unclear...
November 19, 2016: Knee
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