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https://www.readbyqxmd.com/read/29338974/usefulness-of-the-grand-piano-sign-for-determining-femoral-rotational-alignment-in-total-knee-arthroplasty
#1
Takaaki Ohmori, Tamon Kabata, Yoshitomo Kajino, Tadashi Taga, Daisuke Inoue, Takashi Yamamoto, Tomoharu Takagi, Junya Yoshitani, Takuro Ueno, Hiroyuki Tsuchiya
BACKGROUND: The "grand-piano sign" is a well-known indicator of proper rotational femoral alignment. We investigated changes in the shape of the femoral anterior cutting plane by changing the rotational alignment, anterior portion depth, and cutting plane flexion angle. METHODS: We simulated various cutting planes after cutting the anterior portion of the femur next to the distal femoral osteotomy in 50 patients with varus knee and also a femoral anterior osteotomy with four degree (S group) and seven degree (T group) flexion angles regarding the mechanical axis...
January 12, 2018: Knee
https://www.readbyqxmd.com/read/29329889/exploring-individual-adaptations-to-an-anterior-cruciate-ligament-injury-prevention-programme
#2
Aaron S Fox, Jason Bonacci, Scott G McLean, Natalie Saunders
BACKGROUND: Individual responses to anterior cruciate ligament injury prevention programmes (ACL IPPs) have received little attention. This study examined the effects of an ACL IPP on neuromuscular control and lower limb biomechanics during landing at the group and individual levels. METHODS: Sixteen female athletes were randomly allocated to training (n=8) or control (n=8) groups. Electromyography, and three-dimensional kinematic and kinetic data were collected during landing at two testing sessions...
January 9, 2018: Knee
https://www.readbyqxmd.com/read/29329888/associations-between-cartilage-proteoglycan-density-and-patient-outcomes-12months-following-anterior-cruciate-ligament-reconstruction
#3
Brian Pietrosimone, Daniel Nissman, Darin A Padua, J Troy Blackburn, Matthew S Harkey, Robert A Creighton, Ganesh M Kamath, Kaitlin Healy, Randy Schmitz, Jeffrey B Driban, Steve W Marshall, Joanne M Jordan, Jeffrey T Spang
BACKGROUND: Lower proteoglycan density (PGD) of the articular cartilage may be an early marker of osteoarthritis following anterior cruciate ligament (ACL) reconstruction (ACL-R). The purpose this study was to determine associations between the Knee Injury and Osteoarthritis Outcomes Score (KOOS) and PGD of the articular cartilage in the femur and tibia 12-months following ACL-R. METHODS: We evaluated KOOS pain, symptoms, function in activities of daily living (ADL), function in sport and recreation (Sport), and quality of life (QOL), as well as PGD using T1rho magnetic resonance imaging in 18 individuals 12...
January 9, 2018: Knee
https://www.readbyqxmd.com/read/29325838/clinical-and-radiologic-evaluation-of-medial-epicondylar-osteotomy-for-varus-total-knee-arthroplasty
#4
Jae Ang Sim, Young Gon Na, Jae Yun Go, Beom Koo Lee
BACKGROUND: In varus total knee arthroplasty (TKA), a pathologic contracture of the medial soft tissue should be released for ligament balancing. A medial epicondylar osteotomy has been performed as an alternative method for this. The purpose of this study was to demonstrate the clinical and radiologic results of medial epicondylar osteotomy for varus TKA, focusing on the union type of osteotomy site. METHODS: The study retrospectively evaluated 61 cases with a mean femorotibial angle of 10...
January 9, 2018: Knee
https://www.readbyqxmd.com/read/29325837/outcomes-of-total-knee-arthroplasty-in-degenerative-osteoarthritic-knee-with-genu-recurvatum
#5
Seung-Suk Seo, Chang-Wan Kim, Chang-Rack Lee, Jin-Hyuk Seo, Do-Hun Kim, Ok-Gul Kim
BACKGROUND: This study aimed to assess the incidence of genu recurvatum without neuromuscular disorders in knees that underwent navigation-assisted total knee arthroplasty (TKA), to evaluate short-term radiologic and clinical results of navigation-assisted TKA in genu recurvatum, and to evaluate differences in results according to the degree of pre-operative hyperextension and type of implant and insert. METHODS: This study retrospectively reviewed 510 knees that underwent navigation-assisted TKA from January 2005 to December 2011...
January 9, 2018: Knee
https://www.readbyqxmd.com/read/29325834/a-computed-tomography-scan-based-template-to-place-the-femoral-component-in-accurate-rotation-with-respect-to-the-surgical-epicondylar-axis-in-total-knee-arthroplasty
#6
Yasushi Oshima, Norishige Iizawa, Tatsunori Kataoka, Tokifumi Majima, Shinro Takai
BACKGROUND: Femoral rotational alignment is considered an essential factor for total knee arthroplasty because malrotation of femoral components results in poor outcomes. To obtain proper alignment, we developed a superimposable computed tomography (CT) scan-based template to intraoperatively determine the accurate surgical epicondylar axis (SEA), and evaluated the effectiveness of this CT template. METHODS: In the experimental group (n=55), three serial slices of CT images, including medial and lateral epicondyles, were merged into a single image, and SEA was overlaid...
January 9, 2018: Knee
https://www.readbyqxmd.com/read/29325840/early-comparative-outcomes-of-unicompartmental-and-total-knee-arthroplasty-in-severely-obese-patients
#7
Zachary C Lum, David A Crawford, Adolph V Lombardi, Jason M Hurst, Michael J Morris, Joanne B Adams, Keith R Berend
BACKGROUND: Medial unicompartmental knee arthroplasty (UKA) may have advantages over total knee arthroplasty (TKA) in the setting of obesity. There has been no direct comparison between the two cohorts. This study compares outcomes and complications of severely obese patients undergoing medial UKA versus TKA. METHODS: Six hundred and fifty medial UKA and 1300 TKA were performed in patients with BMI >35kg/m2 (mean 41kg/m2) between 2007 and 2012. Pre- and postoperative ROM, Knee Society scores, perioperative factors, complications and reoperations were compared...
January 8, 2018: Knee
https://www.readbyqxmd.com/read/29325839/the-effect-of-low-load-exercise-on-joint-pain-function-and-activities-of-daily-living-in-patients-with-knee-osteoarthritis
#8
Jason Peeler, Jacquie Ripat
BACKGROUND: Knee osteoarthritis has a lifetime risk of nearly one in two, with obese individuals being most susceptible. While exercise is universally recognized as a critical component for management, unsafe or ineffective exercise frequently leads to exacerbation of joint symptoms. AIM: Evaluate the effect of a 12week lower body positive pressure (LBPP) supported low-load treadmill walking program on knee pain, joint function, and performance of daily activities in patients with knee osteoarthritis (OA)...
January 8, 2018: Knee
https://www.readbyqxmd.com/read/29325836/interleukin-6-and-leptin-levels-are-associated-with-preoperative-pain-severity-in-patients-with-osteoarthritis-but-not-with-acute-pain-after-total-knee-arthroplasty
#9
Syed Azim, James Nicholson, Mario J Rebecchi, William Galbavy, Tian Feng, Sabeen Rizwan, Ruth A Reinsel, Martin Kaczocha, Helene Benveniste
BACKGROUND: Identifying drivers of pain that can serve as novel drug targets is important for improving perioperative analgesia. Total knee arthroplasty (TKA) is associated with significant postoperative pain. Cytokines contribute to the pathophysiology of osteoarthritis (OA) and associated pain. However, the influence of perioperative cytokine levels after TKA surgery upon postoperative pain remains unexplored. METHODS: We designed a prospective observational study to profile three proinflammatory cytokines, interleukin-6 (IL-6), tumor necrosis factor α (TNFα), and leptin in serum, synovial, and cerebrospinal fluid of TKA patients perioperatively to determine associations between cytokine levels and pain...
January 8, 2018: Knee
https://www.readbyqxmd.com/read/29325835/synthetic-mesh-vs-allograft-extensor-mechanism-reconstruction-in-total-knee-arthroplasty-a-systematic-review-of-the-literature-and-meta-analysis
#10
REVIEW
David Shau, Ryan Patton, Suhag Patel, Laura Ward, George Guild
BACKGROUND: Extensor mechanism disruption after total knee arthroplasty (TKA) is a devastating complication. Reconstruction with allograft and synthetic mesh has been described. However, these reports have typically been small case series, and controversy exists with regard to which reconstruction technique is optimal. METHODS: The authors performed a systematic review using PUBMED, MEDLINE, EMBASE, BIOSIS, Clinicaltrials.gov, and Cochrane Database of Systematic Reviews identifying 14 articles meeting inclusion criteria and producing 204 knees for comparison...
January 8, 2018: Knee
https://www.readbyqxmd.com/read/29307479/anterior-tibial-laxity-using-the-gnrb%C3%A2-device-in-healthy-knees
#11
Y Alqahtani, J Murgier, P Beaufils, P Boisrenoult, C Steltzlen, N Pujol
BACKGROUND: GRNB® is a non-radiating power tool that allows the evaluation of the anterior tibial translation. HYPOTHESIS: The pressure exerted by the system against the patella and the body mass index (BMI) could affect the anterior tibial translation when we repeat the measurements in healthy knees. MATERIALS AND METHODS: We retrospectively evaluated the measurements of anterior knee laxity in healthy knees carried out by the GNRB® in 69 consecutive patients who underwent anterior cruciate ligament (ACL) repair in the contralateral knee...
January 4, 2018: Knee
https://www.readbyqxmd.com/read/29305025/visual-knee-kinetic-biofeedback-technique-normalizes-gait-abnormalities-during-high-demand-mobility-after-total-knee-arthroplasty
#12
Jesse C Christensen, Paul C LaStayo, Robin L Marcus, Gregory J Stoddard, K Bo Foreman, Ryan L Mizner, Christopher L Peters, Christopher E Pelt
BACKGROUND: Abnormal knee mechanics frequently follow total knee arthroplasty (TKA) surgery with these deficits amplifying as task demands increase. Knee-kinetic biofeedback could provide a means of attenuating gait abnormalities. The purposes of this study were as follows: (1) to describe the gait characteristic differences between patients with TKA and non-TKA adults during level (low-demand) and decline (high-demand) walking; and (2) where differences existed, to determine the impact of knee-kinetic biofeedback on normalizing these abnormalities...
January 2, 2018: Knee
https://www.readbyqxmd.com/read/29223707/reliability-of-two-techniques-and-training-level-of-the-observer-in-measuring-the-correction-angle-when-planning-a-high-tibial-osteotomy
#13
Julia Blackburn, Aneel Ansari, Andrew Porteous, James Murray
BACKGROUND: In high tibial osteotomy, planning is critical for achieving successful realignment. Any method selected needs to be reliable, with inter-observer and intra-observer correlation. A literature review demonstrated two distinct methods of planning for high tibial osteotomy. HYPOTHESIS: Both methods are precise and show excellent inter and intra-observer correlation. METHOD: Fifty consecutive weight-bearing long leg alignment antero-posterior (AP) radiographs were identified and planning undertaken on suitable radiographs using the methods of Puddu (method 1) and Miniaci (method 2)...
December 6, 2017: Knee
https://www.readbyqxmd.com/read/29174844/neuromuscular-adaptations-in-older-males-and-females-with-knee-osteoarthritis-during-weight-bearing-force-control
#14
Heather J Bigham, Teresa E Flaxman, Andrew J J Smith, Daniel L Benoit
BACKGROUND: Females exhibit significantly greater incidence, prevalence, and severity of osteoarthritis (OA) compared to males. Despite known biological, morphological, and functional differences between males and females, there has been little sex-related investigation into sex-specific biomechanical and neuromuscular responses to OA. OBJECTIVE: To identify sex-related differences in OA-affected adults and within-sex differences between healthy and OA-affected adults' muscular activation patterns during lower limb loading...
November 22, 2017: Knee
https://www.readbyqxmd.com/read/29162378/arthroscopic-medial-meniscal-repair-with-or-without-concurrent-anterior-cruciate-ligament-reconstruction-a-subgroup-analysis
#15
Erdal Uzun, Abdulhamit Misir, Turan Bilge Kizkapan, Mustafa Ozcamdalli, Soner Akkurt, Ahmet Guney
BACKGROUND: There are few large-scale, long-term studies comparing medial meniscal repairs with or without concurrent anterior cruciate ligament (ACL) reconstruction. METHODS: A total of 140 patients who underwent arthroscopic medial meniscal repair were divided into two groups: Group A, meniscus repair only and Group B, meniscus repair with concurrent ACL reconstruction. Clinical assessments in- cluded physical examination findings, Lysholm score, and the International Knee Documentation Committee (IKDC) form...
November 18, 2017: Knee
https://www.readbyqxmd.com/read/29162377/smartphone-based-accelerometry-is-a-valid-tool-for-measuring-dynamic-changes-in-knee-extension-range-of-motion
#16
Morten Pallisgaard Støve, Thorvaldur Skuli Palsson, Rogerio Pessoto Hirata
INTRODUCTION: Measurement of static joint range of motion is used extensively in orthopaedic and rehabilitative communities to benchmark treatment efficacy. Static measures are, however, insufficient in providing detailed information about patient impairments. Dynamic range of motion measures could provide more detailed information about patient impairments thus leading to better clinical assessments. Reliable and valid methods are available, but due to limitations in the present technology, dynamic measures are seldom performed in clinical settings...
November 18, 2017: Knee
https://www.readbyqxmd.com/read/29108731/ratio-of-the-tibial-tuberosity-trochlear-groove-distance-to-the-tibial-maximal-mediolateral-axis-a-more-reliable-and-standardized-way-to-measure-the-tibial-tuberosity-trochlear-groove-distance
#17
Pengkai Cao, Yingzhen Niu, Chang Liu, Xiaomeng Wang, Guman Duan, Qinghua Mu, Xintong Luo, Fei Wang
BACKGROUND: Tibial tuberosity-trochlear groove distance(TT-TG) is a measurement to assist in the diagnosis and treatment of patellar instability, however it still has some limitations. Our study was to modify the accepted measurement method and seek a more reliable and standardized method. METHODS: The data of 65 healthy controls and 49 patients with bilateral patellar instability from 2010 to 2016 were collected and analyzed by CT. The TT-TG, tibial maximal mediolateral axis (MML), and their ratio [i...
November 3, 2017: Knee
https://www.readbyqxmd.com/read/29195846/association-of-fibulin-3-concentrations-with-the-presence-and-severity-of-knee-osteoarthritis-a-cross-sectional-study
#18
Qian Wu, Xuecheng Sun, Lei Du
BACKGROUND: Fibulin-3, a member of the extracellular matrix glycoproteins family, negatively regulates chondrocyte differentiation. This study aims to assess the correlation of fibulin-3 concentrations with the presence and severity of knee osteoarthritis. METHODS: This cross-sectional study was performed in a population of 209 knee osteoarthritis subjects who received hyaluronic acid treatment and 165 healthy controls. Knee osteoarthritis diagnosis was made according to the criteria of the American College of Rheumatology...
December 2017: Knee
https://www.readbyqxmd.com/read/29195845/december-2017
#19
EDITORIAL
A Viste
No abstract text is available yet for this article.
December 2017: Knee
https://www.readbyqxmd.com/read/29021089/patellofemoral-arthritis-treated-with-resurfacing-implant-clinical-outcome-and-complications-at-a-minimum-two-year-follow-up
#20
Juan Pablo Zicaro, Carlos Yacuzzi, Juan Astoul Bonorino, Lisandro Carbo, Matias Costa-Paz
BACKGROUND: This study evaluated the clinical and radiographic outcomes of a series of patients treated with an anatomic inlay resurfacing implant, with a minimum two-year follow-up. METHODS: Fifteen patients underwent patellofemoral-resurfacing procedures using a HemiCAP Wave Patellofemoral Inlay Resurfacing implant from 2010 to 2013. Clinical outcomes included: Visual Analog Scale (VAS), Lysholm score, Knee Society Score (KSS), and evaluation of Kujala, and Hospital for Special Surgery Patellofemoral score (HSS-PF)...
December 2017: Knee
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