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https://www.readbyqxmd.com/read/28095108/the-relationship-between-2d-knee-valgus-angle-during-single-leg-squat-single-leg-land-and-drop-jump-screening-tests
#1
Allan Munro, Lee Herrington, Paul Comfort
CONTEXT: Anterior Cruciate Ligament (ACL) and Patellofemoral Joint (PFJ) injuries are a significant problem among female athletes. A number of screening tasks have been used in the literature to identify those at greatest risk of injury. To date, no study has examined the relationship in two-dimensional (2D) knee valgus between common screening tasks to determine whether individuals exhibit similar movement patterns across tasks. OBJECTIVE: to establish whether frontal plane projection angle (FPPA) during the single leg squat (SLS), single leg land (SLL) and drop jump (DJ) are related...
January 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28091802/increased-risk-of-revision-reoperation-and-implant-constraint-in-tka-after-multiligament-knee-surgery
#2
Steven I Pancio, Paul L Sousa, Aaron J Krych, Matthew P Abdel, Bruce A Levy, Diane L Dahm, Michael J Stuart
BACKGROUND: The risk of major complications and revision arthroplasty after TKA in patients who previously underwent multiligament knee surgery have been poorly characterized. QUESTIONS/PURPOSES: Is multiligament knee surgery before TKA associated with (1) worse implant survival, (2) increased use of TKA design constraint, (3) a greater risk for major complications, and (4) poorer scores for pain and function compared with similar patients receiving TKA for primary osteoarthritis? METHODS: Fifty-nine TKAs were performed at our institution between 1985 and 2014 in 59 patients (36 men, 23 women; mean age, 53 years) with a history of previous multiligament knee surgery (≥ two ligaments)...
January 13, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28089797/distal-femoral-hemiepiphysiodesis-using-screw-and-non-absorbable-filament-for-the-treatment-of-idiopatic-genu-valgum-preliminary-results-of-12-knees
#3
Gino Martínez Soto, Sebastián Drago Pérez, Carolina Avilés Espinoza, Angélica Ibañez León, Felipe Hodgson Ovalle, Constanza Ramírez Mac-Lean
INTRODUCTION: Different techniques for gradual correction of angular deformities of lower limbs exist. Screws and nonabsorbable filament has been described as an effective alternative for transitory hemiepiphysiodesis in New Zealand rabbits. HYPOTHESIS: Hemiepiphysiodesis using screws and non-absorbable filament is effective in pediatric population, for correction of genu valgum. METHODS: Retrospective evaluation, 12 knees in 6 patients younger than 15 years (3 female), operated because of genu valgum...
January 9, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28088941/fracture-union-in-percutaneous-kirschner-wire-fixation-in-paediatric-tibial-shaft-fractures
#4
Ramji Lal Sahu, Rajni Ranjan
PURPOSE: To evaluate the efficacy of intramedullary Kirschner wires for the treatment of unstable tibial shaft fractures in children. METHODS: This prospective study was conducted at the Department of Orthopaedic Surgery in Maharishi Markandeshwar Medical College from June 2005 to June 2010. Sixty-six children having closed fracture of the tibial shaft with a mean age of 7.7 years (range, 2-14 years) were recruited from emergency and outpatient department. They were treated with percutaneous intramedullary Kirschner wires...
December 1, 2016: Chinese Journal of Traumatology, Zhonghua Chuang Shang za Zhi
https://www.readbyqxmd.com/read/28078394/kinematics-of-a-bicruciate-retaining-total-knee-arthroplasty
#5
Thomas J Heyse, Joshua Slane, Geert Peersman, Margo Dirckx, Arne van de Vyver, Philipp Dworschak, Susanne Fuchs-Winkelmann, Lennart Scheys
PURPOSE: The recently reintroduced bicruciate-retaining Total Knee Arthroplasty (BCR TKA) is an interesting approach in the quest for close replication of knee joint biomechanics and kinematics closer to the native knee. Therefore, this study aimed at providing a detailed biomechanical view on the functional resemblance of BCR TKA to the native knee joint. METHODS: Seven fresh-frozen full leg cadaver specimens (76 ± 10 year) were mounted in a 6 degrees-of-freedom kinematic rig that applied a dynamic squatting motion knee flexion...
January 11, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28072630/bracing-of-the-reconstructed-and-osteoarthritic-knee-during-high-dynamic-load-tasks
#6
Harvi F Hart, Kay M Crossley, Natalie J Collins, David C Ackland
PURPOSE: Lateral compartment osteoarthritis accompanied by abnormal knee biomechanics are frequently reported in individuals with knee osteoarthritis after anterior cruciate ligament reconstruction (ACLR). The aim of this study was to evaluate changes in knee biomechanics produced by an adjusted and unadjusted varus knee brace during high dynamic loading activities in individuals with lateral knee osteoarthritis after ACLR and valgus malalignment. METHODS: Nineteen participants who had undergone ACLR 5 to 20 years previously and had symptomatic and radiographic lateral knee osteoarthritis with valgus malalignment were assessed...
January 9, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28061849/do-size-shape-and-alignment-parameters-of-the-femoral-condyle-affect-the-trochlear-groove-tracking-a-morphometric-study-based-on-3d-computed-tomography-models-in-chinese-people
#7
Zhe Du, Shichang Chen, Mengning Yan, Bing Yue, Yiming Zeng, You Wang
BACKGROUND: Our study aimed to investigate whether geometrical features (size, shape, or alignment parameters) of the femoral condyle affect the morphology of the trochlear groove. METHODS: Computed tomography models of 195 femurs (97 and 98 knees from male and female subjects, respectively) were reconstructed into three-dimensional models and categorised into four types of trochlear groove morphology based on the position of the turning point in relation to the mechanical axis (types 45°, 60°, 75°, and 90°)...
January 6, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28061515/spacer-based-gap-balancing-in-total-knee-arthroplasty-clinical-success-with-a-reproducible-technique
#8
Frédéric Lavoie
Purpose Proper coronal and transverse ligament balancing is an important aspect of total knee arthroplasty (TKA) and has an impact on postoperative outcome. Many variations of the gap balancing technique were described to address this challenge, most of them using various tensioning devices, but none for which the use is widespread. The aim of this paper is to describe a gap technique variant for TKA using spacer blocks and report the clinical results for a cohort of patients on which it was used. Methods A total of 114 TKAs were performed in 101 patients using a standardized surgical technique that integrates ligament balancing with sizing and positioning of the femoral component...
January 6, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28060180/new-single-stage-double-osteotomy-for-late-presenting-infantile-tibia-vara-a-comprehensive-approach
#9
Edward Abraham, David Toby, Michelle Welborn, Cory W Helder, Angela Murphy
BACKGROUND: Successful surgical treatment of late-presenting infantile tibia vara (ITV) patient requires the correction of oblique deformities. The purpose of this study was to report on a new comprehensive approach to correct and prevent recurrence of these deformities with a single procedure. METHODS: Medical records of 23 consecutive children (7 to 18 y) with advanced ITV (29 knees) were retrospectively reviewed after a mean of 7.3 years postoperatively (range, 2 to 22 y)...
January 5, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28053258/ankle-joint-pressure-changes-in-high-tibial-and-distal-femoral-osteotomies-a-cadaver-study
#10
F Krause, A Barandun, G Klammer, I Zderic, B Gueorguiev, T Schmid
AIMS: To assess the effect of high tibial and distal femoral osteotomies (HTO and DFO) on the pressure characteristics of the ankle joint. MATERIALS AND METHODS: Varus and valgus malalignment of the knee was simulated in human cadaver full-length legs. Testing included four measurements: baseline malalignment, 5° and 10° re-aligning osteotomy, and control baseline malalignment. For HTO, testing was rerun with the subtalar joint fixed. In order to represent half body weight, a 300 N force was applied onto the femoral head...
January 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28050540/keblish-s-lateral-surgical-approach-enhances-patellar-tilt-in-valgus-knee-arthroplasty
#11
José Roberto Tonelli Filho, Marcus Ceregatti Passarelli, João Alberto Salles Brito, Gustavo Constantino Campos, Alessandro Rozim Zorzi, João Batista de Miranda
OBJECTIVE: To compare the clinical and radiological outcomes of conventional medial and lateral approaches for total knee replacement in the valgus osteoarthritic knee. METHODS: In this randomized controlled trial, 21 patients with valgus knee osteoarthritis were randomized to total knee replacement through medial or lateral approach. The primary outcome was radiographic patellar tilt. Secondary outcomes were visual analog scale of pain, postoperative levels of hemoglobin, and clinical aspect of the operative wound...
November 2016: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/28042120/correcting-severe-valgus-deformity-taking-out-the-knock
#12
J Lange, S B Haas
Valgus knee deformity can present a number of unique surgical challenges for the total knee arthroplasty (TKA) surgeon. Understanding the typical patterns of bone and soft-tissue pathology in the valgus arthritic knee is critical for appropriate surgical planning. This review aims to provide the knee arthroplasty surgeon with an understanding of surgical management strategies for the treatment of valgus knee arthritis. Lateral femoral and tibial deficiencies, contracted lateral soft tissues, attenuated medial soft tissues, and multiplanar deformities may all be present in the valgus arthritic knee...
January 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28039023/determination-of-the-accuracy-of-navigated-kinematic-unicompartmental-knee-arthroplasty-a-2-year-follow-up
#13
Andrea L Grant, Kenji D Doma, Kaushik Hazratwala
BACKGROUND: Unicompartmental knee arthroplasty (UKA) lacks history of patient satisfaction and research addressing technique validity. The aim of this study was to determine minimally invasive navigated kinematic UKA accuracy by comparing postoperative limb alignment with preoperative stress values. METHODS: A single-center retrospective study was conducted on 53 consecutive patients (postoperative alignment: varus n = 51, valgus n = 2) who underwent computer navigation assisted UKA...
November 29, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28031496/arthroscopic-transphyseal-anterior-cruciate-ligament-reconstruction-in-adolescent-athletes
#14
Luca Dei Giudici, Roberto Fabbrini, Luca Garro, Serena Arima, Antonio Gigante, Agostino Tucciarone
PURPOSE: To evaluate the 5-year outcome of arthroscopic transphyseal anterior cruciate ligament (ACL) reconstruction in 19 adolescent athletes. METHODS: 14 male and 5 female adolescent athletes aged 12 to 16 (mean, 13.9) years with Tanner stage 2 or 3 open physes underwent arthroscopic transphyseal ACL reconstruction by a single surgeon and were followed up for 5 years. Patients were evaluated using the numerical rating score (NRS) for pain, knee osteoarthritis outcome score (KOOS), International Knee Documentation Committee (IKDC) score, Tegner Activity Scale, and Lysholm Score, as well as the leg length discrepancy, femorotibial alignment, varus or valgus deformities, active and passive knee range of motion...
December 2016: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28029798/should-the-ipsilateral-hamstrings-be-used-for-anterior-cruciate-ligament-reconstruction-in-the-case-of-medial-collateral-ligament-insufficiency
#15
Mirco Herbort, Philipp Michel, Michael J Raschke, Nils Vogel, Martin Schulze, Alexander Zoll, Christian Fink, Wolf Petersen, Christoph Domnick
BACKGROUND: Semitendinosus and gracilis muscles are frequently harvested for autologous tendon grafts for cruciate ligament reconstruction. This study investigated the joint-stabilizing effects of these hamstring muscles in cases of insufficiency of the medial collateral ligament (MCL). HYPOTHESES: First, both the semitendinosus and gracilis muscles can actively stabilize the joint against valgus moments in the MCL-deficient knee. Second, the stabilizing influence of these muscles decreases with an increasing knee flexion angle...
December 1, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28029578/stemmed-tibial-revision-component-alignment-does-an-anatomic-conflict-exist
#16
Kevin M Smith, Andrew Moorman, Sabir K Ismaily, Stephen J Incavo
INTRODUCTION: Obtaining satisfactory coronal plane alignment is important for success in revision total knee arthroplasty (TKA). The study objective was to determine tibial coronal plane alignment after TKA when a tibial stem was used and assess if there was an anatomic conflict in tibial stemmed component alignment. MATERIALS AND METHODS: A radiographic review of 88 revision TKA cases was performed. Full length leg radiographs were examined for varus/valgus alignment, defined as greater than or equal to three degrees from neutral 180 degrees, canal or non-canal filling tibial stems, and any native tibial bow...
October 29, 2016: Knee
https://www.readbyqxmd.com/read/28017707/the-rectangular-flexion-gap-is-associated-with-an-increased-knee-flexion-angle-in-a-cruciate-sacrificing-rotating-platform-mobile-bearing-total-knee-arthroplasty
#17
Tadashi Tsukeoka, Yoshikazu Tsuneizumi, Kensuke Yoshino
BACKGROUND: The knee flexion angle after a total knee arthroplasty is an important indicator of clinical outcome. However, there is little appropriate information about the correlation between the ligament balancing and knee flexion angle after total knee arthroplasty. The purpose of this study was to investigate the effect of the ligamentous balance in extension and flexion on knee flexion angle one year after posterior cruciate ligament sacrificing rotating platform total knee arthroplasty...
December 23, 2016: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28013024/sex-differences-in-total-frontal-plane-knee-movement-and-velocity-during-a-functional-single-leg-landing
#18
Walter L Jenkins, D S Blaise Williams, Kelsey Williams, Josh Hefner, Hannah Welch
OBJECTIVES: Females land with more knee valgus than males. While most studies have evaluated lower extremity mechanics during double leg landing, most sports require single-leg landing from a double or single leg takeoff. Further, knee movement occurs toward both varus and valgus during functional landing. The purpose of this study was to determine if differences exist between females and males in total frontal plane movement and velocity of the knee during single-leg landing. DESIGN: Experimental cohort...
September 6, 2016: Physical Therapy in Sport
https://www.readbyqxmd.com/read/28012003/effect-of-radial-meniscal-tear-on-in-situ-forces-of-meniscus-and-tibiofemoral-relationship
#19
Yuta Tachibana, Tatsuo Mae, Hiromichi Fujie, Konsei Shino, Tomoki Ohori, Hideki Yoshikawa, Ken Nakata
PURPOSE: To clarify the effect of the radial tear of the lateral meniscus on the in situ meniscus force and the tibiofemoral relationship under axial loads and valgus torques. METHODS: Ten intact porcine knees were settled to a 6-degree of freedom robotic system, while the force and 3-dimensional path of the knees were recorded via Universal Force Sensor (UFS) during 3 cycles of 250-N axial load and 5-Nm valgus torque at 15°, 30°, 45°, and 60° of knee flexion...
December 23, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28005109/perceived-leg-length-discrepancy-after-primary-total-knee-arthroplasty-does-knee-alignment-play-a-role
#20
Zachary H Goldstein, Paul H Yi, Brian Batko, Sean Kearns, Matthew W Tetreault, Brett R Levine, Craig J Della Valle, Scott M Sporer
Leg length discrepancy (LLD) is common after total knee arthroplasty (TKA) although its incidence has not been well documented. The purpose of this study was to determine the incidence of perceived LLD before and after primary total knee arthroplasty as well as to determine the correlation between mechanical axis of the knee and perceived LLD. The incidence and time frame of resolution of postoperative LLD was also assessed. Seventy-three patients were prospectively enrolled. Evaluation included patient surveys regarding perceived LLD preoperatively, and at 3- to 6-week, 3-month, 6-month, and 1-year visits...
November 2016: American Journal of Orthopedics
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