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https://www.readbyqxmd.com/read/29691176/anthropometric-measurements-of-knee-joints-in-the-hispanic-population
#1
Colin A McNamara, Amer A Hanano, Jesus M Villa, Gustavo M Huaman, Preetesh D Patel, Juan C Suarez
BACKGROUND: Total knee arthroplasty (TKA) systems provide a set of incrementally sized tibial and femoral components intended to accommodate most knee parameters. However, the most commonly used systems in the United States were developed using data from Caucasian patients which might not lead to the best fit in non-Caucasians. Therefore, we wanted to evaluate whether these TKA systems proportionally match femoral and tibial measurements in Hispanics. METHODS: All lower extremity magnetic resonance imaging performed at our institution between January 2007 and October 2015 were screened...
March 27, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29691174/ten-year-mortality-and-revision-after-total-knee-arthroplasty-in-morbidly-obese-patients
#2
Mina Tohidi, Susan B Brogly, Katherine Lajkosz, Heather J Grant, Elizabeth G VanDenKerkhof, Aaron R Campbell
BACKGROUND: Although morbid obesity has been associated with early surgical complications after total knee arthroplasty (TKA), evidence of long-term outcomes is limited. We conducted a population-based study to determine the association between morbid obesity and 10-year survival and revision surgery in patients undergoing primary TKA. METHODS: A cohort study of 9817 patients aged 18-60 years treated with primary TKA from April 1, 2002 to March 31, 2007 was conducted using Ontario administrative health-care databases of universal health-care coverage...
April 4, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29691173/cruciate-retaining-vs-posterior-stabilized-primary-total-arthroplasty-clinical-outcome-comparison-with-a-minimum-follow-up-of-10-years
#3
Ricardo Serna-Berna, Alejandro Lizaur-Utrilla, Maria F Vizcaya-Moreno, Francisco A Miralles Muñoz, Blanca Gonzalez-Navarro, Fernando A Lopez-Prats
BACKGROUND: Controversy continues regarding whether the posterior cruciate ligament should be retained or removed during total knee arthroplasty (TKA) procedure. The objective was to compare the clinical outcomes with a minimum follow-up of 10 years between patients who received contemporary cruciate-retaining or posterior-stabilized primary TKA. METHODS: Case-control study of 268 patients who underwent cruciate-retaining TKA vs 211 to posterior-stabilized design, with the same arthroplasty system, and a minimum follow-up of 10 years...
March 17, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29691172/revision-of-unicompartmental-knee-arthroplasty-to-total-knee-arthroplasty-is-it-as-good-as-a-primary-result
#4
Adolph V Lombardi, Mark T Kolich, Keith R Berend, Michael J Morris, David A Crawford, Joanne B Adams
BACKGROUND: Unicompartmental knee arthroplasty (UKA) is touted as a more conservative, bone- and tissue-sparing procedure than total knee arthroplasty (TKA). Similarly, revision of UKA to TKA is generally a simpler procedure than revision of TKA to TKA and can be accomplished with primary TKA components in most cases. The purpose of this study was to review a consecutive series of patients undergoing revision of failed UKA to TKA to determine if etiology is similar to that reported in recent literature and evaluate if the results align more with primary TKA vs revision of TKA to TKA...
March 17, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29691171/risk-adjustment-is-necessary-in-medicare-bundled-payment-models-for-total-hip-and-knee-arthroplasty
#5
P Maxwell Courtney, Daniel D Bohl, Edmund C Lau, Kevin L Ong, Joshua J Jacobs, Craig J Della Valle
BACKGROUND: Concerns exist that high-risk patients in alternative payment models may face difficulties with access to care without proper risk adjustment. The purpose of this study is to identify the effect of medical and orthopedic specific risk factors on the cost of a 90-day episode of care following total hip (THA) and knee arthroplasty (TKA). METHODS: We queried the Medicare 5% Limited Data Set for all patients undergoing primary THA and TKA from 2010 to 2014...
March 17, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29691170/outcomes-of-articulating-spacers-with-autoclaved-femoral-components-in-total-knee-arthroplasty-infection
#6
Daniel E Goltz, E Grant Sutter, Michael P Bolognesi, Samuel S Wellman
BACKGROUND: In 2-stage revision of total knee arthroplasty (TKA) infection, articulating antibiotic spacers show similar eradication rates and superior range of motion compared with static spacers. This study evaluated infection control and other outcomes in articulating spacers with an autoclaved index femoral component. METHODS: We reviewed 59 patients who underwent 2-stage treatment of TKA infection using articulating antibiotic spacers with an autoclaved femoral component with at least 2-year follow-up (mean: 5...
March 30, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29691169/treatment-success-following-joint-arthroplasty-defining-thresholds-for-the-oxford-hip-and-knee-scores
#7
David F Hamilton, Fanny L Loth, Deborah J MacDonald, Karlmeinrad Giesinger, James T Patton, A Hamish Simpson, Colin R Howie, Johannes M Giesinger
BACKGROUND: Patient-reported outcome scores are the mainstay method for quantifying success following arthroplasty. However, it is unclear when a "successful outcome" is achieved. We calculated threshold values for the Oxford Hip and Knee Score (OHS and OKS) representing achievement of a successful treatment at 12-month follow-up. METHODS: Questionnaires were administered to patients undergoing total hip (THA) or knee (TKA) arthroplasty before and 12 months after surgery alongside questions assessing key aspects of treatment success...
March 30, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29690729/-clinical-study-of-a-new-wearable-device-for-rehabilitation-after-total-knee-arthroplasty
#8
K Kang, Q Geng, H T Xu, X Z Zheng, J T Dong, T Li, Z G Zhao, S J Gao
Objective: To evaluate the effect of promoting knee joint rehabilitation after total knee arthroplasty (TKA) with a rehabilitation training instrument NEO-GAIT. Methods: Sixty patients who received TKA from January 2017 to July 2017 in the Third Hospital of Hebei Medical University were randomly assigned to receive rehabilitation training with continuous passive motion (CPM) or NEO-GAIT with random number (30 cases in CPM group, included 8 males and 22 females; 30 cases in NEO-GAIT group, included 6 males and 24 females)...
April 17, 2018: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29686970/why-total-knees-fail-a-modern-perspective-review
#9
REVIEW
Zachary C Lum, Alvin K Shieh, Lawrence D Dorr
Historically, the most common mechanism of total knee arthroplasty (TKA) failures included aseptic loosening, instability and malalignment. As polyethylene production improved, modes of failure from polyethylene wear and subsequent osteolysis became less prevalent. Newer longitudinal studies report that infection has become the primary acute cause of failure with loosening and instability remaining as the overall greatest reasons for revision. Clinical database and worldwide national registries confirm these reports...
April 18, 2018: World Journal of Orthopedics
https://www.readbyqxmd.com/read/29685500/evidence-of-generalised-mechanical-hyperalgesia-in-patients-with-advanced-knee-osteoarthritis-undergoing-total-knee-arthroplasty
#10
Khalid Jaber, Shaun O'Leary, Ashley Pedler, Michele Sterling, Michael McAuliffe
BACKGROUND AND OBJECTIVE: Persistent pain is reported in up to 34% of patients following total knee arthroplasty (TKA) for management of knee osteoarthritis (KOA). Persistent pain in this group is thought to be at least partly reflective of pain sensory hypersensitivity. The objective of this study was to evaluate sensory hypersensitivity, using mechanical and thermal quantitative sensory testing, in patients about to undergo TKA. DESIGN AND METHODS: Pressure pain thresholds (PPT) and cold pain thresholds (CPT) were recorded from 30 participants prior to their TKA, and compared with recordings taken from 30 healthy control participants of similar age and gender...
April 20, 2018: Knee
https://www.readbyqxmd.com/read/29684539/fewer-complications-after-uka-than-tka-in-patients-over-85-years-of-age-a-case-control-study
#11
Quentin Ode, Romain Gaillard, Cécile Batailler, Yannick Herry, Philippe Neyret, Elvire Servien, Sébastien Lustig
INTRODUCTION: Implanting a knee prosthesis in patients aged over 85 years is not without risk. Unicompartmental knee arthroplasty (UKA) is reputed to show lower morbidity and mortality than total knee arthroplasty (TKA). Elderly patients with isolated unicompartmental osteoarthritis without specific contraindications are thus good candidates for this procedure. The present retrospective case-control study compared complications rates in elderly patients receiving UKA versus TKA. The study hypothesis was that UKA incurs fewer complications, with equivalent functional results...
April 20, 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29681492/revision-total-knee-arthroplasty-for-arthrofibrosis
#12
Richard W Rutherford, Jason M Jennings, Daniel L Levy, Thomas J Parisi, J Ryan Martin, Douglas A Dennis
BACKGROUND: Arthrofibrosis after TKA is a significant cause of patient dissatisfaction. There is little evidence regarding revision arthroplasty in this patient population. The purpose of this study is to evaluate outcomes after revision TKA for arthrofibrosis. METHODS: We retrospectively reviewed 46 consecutive revision TKAs for arthrofibrosis between 2007 and 2015 with minimum 2-year follow-up. Range of motion (ROM), complication rates, and Knee Society Scores (KSS) were recorded...
March 23, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29680905/intraoperative-soft-tissue-balance-using-novel-medial-preserving-gap-technique-in-posterior-stabilized-total-knee-arthroplasty-comparison-to-measured-resection-technique
#13
Kanto Nagai, Hirotsugu Muratsu, Yutaro Kanda, Masanori Tsubosaka, Tomoyuki Kamenaga, Hidetoshi Miya, Takehiko Matsushita, Takahiro Niikura, Ryosuke Kuroda, Tomoyuki Matsumoto
PURPOSE: To investigate intraoperative soft tissue balance with femoral component trial in place using a novel medial preserving gap technique, focusing on medial compartment stability and allowing lateral physiological laxity, with compared with using a measured resection technique in posterior-stabilized (PS) total knee arthroplasty (TKA). METHODS: Primary PS TKA, using either medial preserving gap technique (n = 127) or measured resection technique (n = 148), was performed in 275 subjects with varus knee osteoarthritis...
April 21, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29680583/pros-and-cons-a-balanced-view-of-robotics-in-knee-arthroplasty
#14
Jess H Lonner, Yale A Fillingham
In both unicompartmental knee arthroplasty (UKA) and total knee arthroplasty (TKA), compared with conventional techniques robotic technology has been shown to optimize the precision of bone preparation and component alignment, reducing outliers and increasing the percentage of components aligned within 2° or 3° of the target goal. In addition, soft tissue balance can be quantified through a range of motion in UKA and TKA using the various robotic technologies available. Although the presumption has been that the improved alignment associated with robotics will improve function and implant durability, there are limited data to support that notion...
March 30, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29679683/is-distal-femoral-torsion-the-same-in-both-of-a-patient-s-legs-morphometric-ct-study
#15
J-S Beranger, D Dujardin, J-F Taburet, P Boisrenoult, C Steltzlen, P Beaufils, N Pujol
INTRODUCTION: The rotational position of the femoral component is a primary driver of success in total knee arthroplasty. However, distal femoral torsion (DFT) varies greatly between individuals. Measuring DFT preoperatively by CT in combination with computer-assisted surgery can significantly improve the rotational positioning of the femoral component. However, a preoperative CT scan is costly and exposes the patient to radiation. These are doubled when the patient is undergoing bilateral arthroplasty...
April 18, 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29676839/analgesic-consumption-trajectories-in-8-975-patients-1-year-after-fast-track-total-hip-or-knee-arthroplasty
#16
C C Jørgensen, M Petersen, H Kehlet, E K Aasvang
BACKGROUND: Persistent or increased long-term opioid consumption has previously been described following total hip- (THA) and knee arthroplasty (TKA). However, detailed information on postoperative analgesic consumption trajectories and risk factors associated with continued need of analgesics in fast-track THA and TKA is sparse. METHODS: Descriptive multicenter study in primary unilateral fast-track THA or TKA with prospective data on patient characteristics and information on reimbursement entitled dispensed prescriptions of paracetamol, non-steroidal anti-inflammatory drugs, opioids, anticonvulsants, and antidepressants one month preoperatively and one year postoperatively...
April 20, 2018: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/29675508/are-trabecular-metal-cones-a-valid-option-to-treat-metaphyseal-bone-defects-in-complex-primary-and-revision-knee-arthroplasty
#17
REVIEW
Tommaso Bonanzinga, Thorsten Gehrke, Akos Zahar, Stefano Zaffagnini, Maurilio Marcacci, Carl Haasper
Purpose  Metaphyseal bone defects are a challenge in complex primary and revision total knee arthroplasty (TKA). Recently, several studies have been published with promising results about the use of Trabecular Metal (TM) cones to address bone defects. The aim of this study is to review the literature to assess the efficacy of TM cones to address metaphyseal bone loss. Methods  A comprehensive search was performed on PubMed, Medline, CINAHL, Cochrane, Embase, and Google Scholar databases using various combinations of the following keywords: "metaphyseal," "cones," "tantalum," "knee," and "revision...
March 2018: Joints
https://www.readbyqxmd.com/read/29672328/letter-to-the-editor-no-difference-between-trabecular-metal-cones-and-femoral-head-allografts-in-revision-tka-minimum-5-year-followup
#18
Zhuoyuan Chen, Yang Yang, Tao Xiao
No abstract text is available yet for this article.
May 2018: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/29669383/total-knee-arthroplasty-versus-osteochondral-allograft-prevalence-and-risk-factors-following-tibial-plateau-fractures
#19
Lasun O Oladeji, Tina K Dreger, Eli L Pratte, Charles A Baumann, James P Stannard, David A Volgas, Gregory J Della Rocca, Brett D Crist
Orthopaedic surgeons commonly have the misconception that patients with tibial plateau fractures will likely go on to posttraumatic knee arthritis requiring total knee arthroplasty (TKA). In younger patients, osteochondral allograft (OCA) transplantation is an alternative method to address posttraumatic knee arthritis. The purpose of this study was (1) to identify our institutional failure rate following tibial plateau open reduction and internal fixation (ORIF) (failure was defined as conversion to TKA or OCA); (2) to determine if there are patient- or injury-related risk factors predictive of failure; and (3) to characterize differences between patients treated with TKA versus those treated with OCA transplantation...
April 18, 2018: Journal of Knee Surgery
https://www.readbyqxmd.com/read/29667926/proximal-tibia-stress-fracture-with-osteoarthritis-of-knee-radiological-and-functional-analysis-of-one-stage-tka-with-long-stem
#20
Dhanasekaran Soundarrajan, Natesan Rajkumar, Palanisamy Dhanasekararaja, Shanmuganathan Rajasekaran
INTRODUCTION: Proximal tibia stress fractures with knee osteoarthritis pose a challenging situation. We evaluated the radiological and functional outcome of one-stage total knee arthroplasty (TKA) and long stem for patients with varied grades of knee arthritis and proximal tibia stress fractures.  Methods: We analysed 20 patients from April 2012 to March 2017 with proximal tibia stress fractures associated with knee osteoarthritis of varied grades. Out of 20 patients, five were acute fresh fractures...
2018: SICOT-J
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