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https://www.readbyqxmd.com/read/28936684/kinematics-of-mobile-bearing-unicompartmental-knee-arthroplasty-compared-to-native-results-from-an-in-vitro-study
#1
Geert Peersman, Josh Slane, Philippe Vuylsteke, Susanne Fuchs-Winkelmann, Philipp Dworschak, Thomas Heyse, Lennart Scheys
INTRODUCTION: Fixed-bearing unicompartmental knee arthroplasty (UKA) closely replicates native knee kinematics. As few studies have assessed kinematics following mobile-bearing (MB) UKA, the current study aimed to investigate whether MB UKA preserves natural knee kinematics. MATERIALS AND METHODS: Seven fresh-frozen full-leg cadaver specimens were prepared and mounted in a kinematic rig that allowed all degrees of freedom at the knee. Three motion patterns, passive flexion-extension (0°-110° flexion), open-chain extension (5°-70° flexion) and squatting (30°-100° flexion), were performed pre- and post-implantation of a medial MB UKA and compared in terms of rotational and translational knee joint kinematics in the different anatomical planes, respectively...
September 21, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28915887/professional-fulfillment-and-parenting-work-life-balance-in-female-physicians-in-basic-sciences-and-medical-research-a-nationwide-cross-sectional-survey-of-all-80-medical-schools-in-japan
#2
Yuka Yamazaki, Takanori Uka, Eiji Marui
BACKGROUND: In Japan, the field of Basic Sciences encompasses clinical, academic, and translational research, as well as the teaching of medical sciences, with both an MD and PhD typically required. In this study, it was hypothesized that the characteristics of a Basic Sciences career path could offer the professional advancement and personal fulfillment that many female medical doctors would find advantageous. Moreover, encouraging interest in Basic Sciences could help stem shortages that Japan is experiencing in medical fields, as noted in the three principal contributing factors: premature resignation of female clinicians, an imbalance of female physicians engaged in research, and a shortage of medical doctors in the Basic Sciences...
September 15, 2017: Human Resources for Health
https://www.readbyqxmd.com/read/28913557/improved-joint-line-restitution-in-unicompartmental-knee-arthroplasty-using-a-robotic-assisted-surgical-technique
#3
Yannick Herry, Cécile Batailler, Timothy Lording, Elvire Servien, Philippe Neyret, Sebastien Lustig
PURPOSE: Joint-line restitution is one objective of unicompartmental knee arthroplasty (UKA). However, the joint line is often lowered when resurfacing femoral implants are used. The aim of this study was to compare the joint-line height in UKA performed by robotic-assisted and conventional techniques. METHODS: This retrospective case-control study compared two matched groups of patients receiving a resurfacing UKA between 2013 and 2016 by either a robotic-assisted (n = 40) or conventional (n = 40) technique...
September 14, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28893619/evaluation-of-the-effect-of-brominated-flame-retardants-on-hemoglobin-oxidation-and-hemolysis-in-human-erythrocytes
#4
Monika Jarosiewicz, Piotr Duchnowicz, Anna Włuka, Bożena Bukowska
Brominated flame retardants (BFRs) are widely used in many everyday products. Numerous studies have shown that BFRs can be released into the environment. Environmental pollution with these compounds raises concerns about their potentially adverse health effects. The aim of this study was to evaluate the effect of tetrabromobisphenol A (TBBPA), tetrabromobisphenol S (TBBPS), 2,4-dibromophenol (2,4-DBP), 2,4,6- tribromophenol (2,4,6-TBP) and pentabromophenol (PBP) on hemolysis induction and hemoglobin oxidation in human erythrocytes...
September 8, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28882132/hospital-volume-and-the-risk-of-revision-in-oxford-unicompartmental-knee-arthroplasty-in-the-nordic-countries-an-observational-study-of-14-496-cases
#5
Mona Badawy, Anne M Fenstad, Christoffer A Bartz-Johannessen, Kari Indrekvam, Leif I Havelin, Otto Robertsson, Annette W-Dahl, Antti Eskelinen, Keijo Mäkelä, Alma B Pedersen, Henrik M Schrøder, Ove Furnes
BACKGROUND: High procedure volume and dedication to unicompartmental knee arthroplasty (UKA) has been suggested to improve revision rates. This study aimed to quantify the annual hospital volume effect on revision risk in Oxfordu nicompartmental knee arthroplasty in the Nordic countries. METHODS: 14,496 cases of cemented medial Oxford III UKA were identified in 126 hospitals in the four countries included in the Nordic Arthroplasty Register Association (NARA) database from 2000 to 2012...
September 7, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28879594/body-mass-index-changes-after-unicompartmental-knee-arthroplasty-do-not-adversely-influence-patient-outcomes
#6
Zhan Xia, Ming Han Lincoln Liow, Graham Seow-Hng Goh, Hwei Chi Chong, Ngai Nung Lo, Seng Jin Yeo
PURPOSE: The objective of this study is to evaluate the prevalence of patients who lost or gained weight following unicompartmental knee arthroplasty (UKA), the effect of post-operative body mass index (BMI) changes on functional outcomes and quality of life (QoL), and predictive factors associated with BMI changes. METHODS: Prospectively collected data of 1043 patients who underwent UKA between 2000 and 2014 were reviewed. BMI, Knee Society Knee Score and Function Score, Oxford Knee Score (OKS), Short-Form 36 (SF-36) Physical Component Score (PCS) and Mental Component Score and proportion of patients attaining OKS/SF-36 minimal clinically important differences (MCID) were recorded preoperatively and at 2 years post-operatively...
September 6, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28860683/simultaneous-ipsilateral-knee-arthroscopy-and-unicondylar-knee-arthroplasty-is-effective-for-bicompartmental-symptoms
#7
Akshay Lakra, Taylor Murtaugh, Jeffrey A Geller, William Macaulay, Roshan P Shah
BACKGROUND: Patients with unicompartmental radiographic arthritis but bicompartmental symptoms pose a clinical challenge. Some surgeons may perceive it as a contraindication for unicondylar knee arthroplasty (UKA). We investigated patient outcomes 2 years after simultaneous ipsilateral arthroscopy and UKA as compared to a similar group of patients who had total knee replacement (TKA) for a similar clinical presentation. METHODS: We identified 9 patients with simultaneous ipsilateral arthroscopy and UKA between 2004 and 2013, and 12 clinically similar patients treated with TKA...
December 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/28855192/the-effect-of-implant-position-on-bone-strain-following-lateral-unicompartmental-knee-arthroplasty-a-biomechanical-model-using-digital-image-correlation
#8
A M Ali, S D S Newman, P A Hooper, C M Davies, J P Cobb
OBJECTIVES: Unicompartmental knee arthroplasty (UKA) is a demanding procedure, with tibial component subsidence or pain from high tibial strain being potential causes of revision. The optimal position in terms of load transfer has not been documented for lateral UKA. Our aim was to determine the effect of tibial component position on proximal tibial strain. METHODS: A total of 16 composite tibias were implanted with an Oxford Domed Lateral Partial Knee implant using cutting guides to define tibial slope and resection depth...
August 2017: Bone & Joint Research
https://www.readbyqxmd.com/read/28834999/-impact-of-case-numbers-on-the-5-year-survival-rate-of-unicondylar-knee-replacements-in-germany
#9
Elke Jeschke, Thorsten Gehrke, Christian Günster, Karl-Dieter Heller, Jürgen Malzahn, Axel Marx, Fritz-Uwe Niethard, Peter Schräder, Josef Zacher, Andreas Matthias Halder
Background Reported survival rates of unicondylar knee arthroplasty (UKA) vary considerably. The influences of patient characteristics and the type of implant have already been examined. This analysis investigated the influence of hospital volume on 5-year-survival rate, using administrative claims data of Germany's largest health insurance provider. Methods We analysed administrative claims data for 20,946 UKAs covered by the German local healthcare funds (Allgemeine Ortskrankenkasse, AOK) between 2006 and 2012...
August 23, 2017: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/28831821/long-term-outcomes-of-over-8-000-medial-oxford-phase-3-unicompartmental-knees-a-systematic-review
#10
Hasan R Mohammad, Louise Strickland, Thomas W Hamilton, David W Murray
Background and purpose - There is debate as to the relative merits of unicompartmental and total knee arthroplasty (UKA, TKA). Although the designer surgeons have achieved good results with the Oxford UKA there is concern over the reproducibility of these outcomes. Therefore, we evaluated published long-term outcomes of the Oxford Phase 3 UKA. Patients and methods - We searched databases to identify studies reporting ≥10 year outcomes of the medial Oxford Phase 3 UKA. Revision, non-revision, and re-operation rates were calculated per 100 component years (% pa)...
August 23, 2017: Acta Orthopaedica
https://www.readbyqxmd.com/read/28831554/the-impact-of-patient-specific-instrumentation-on-unicompartmental-knee-arthroplasty-a-prospective-randomised-controlled-study
#11
Abtin Alvand, Tanvir Khan, Cathy Jenkins, Jonathan L Rees, William F Jackson, Christopher A F Dodd, David W Murray, Andrew J Price
PURPOSE: Patient-specific instrumentation (PSI) has been proposed as a means of improving surgical accuracy and ease of implantation during technically challenging procedures such as unicompartmental knee arthroplasty (UKA). The purpose of this prospective randomised controlled trial was to compare the accuracy of implantation and functional outcome of mobile-bearing medial UKAs implanted with and without PSI by experienced UKA surgeons. METHODS: Mobile-bearing medial UKAs were implanted in 43 patients using either PSI guides or conventional instrumentation...
August 22, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28827053/bilateral-simultaneous-unicompartmental-knee-arthroplasty-versus-unilateral-total-knee-arthroplasty-a-comparison-of-the-amount-of-blood-loss-and-transfusion-perioperative-complications-hospital-stay-and-functional-recovery
#12
J H Ahn, D M Kang, K J Choi
BACKGROUND: Unicompartmental knee arthroplasty (UKA) is a good alternative treatment option to total knee arthroplasty (TKA) for single compartment knee osteoarthritis. Several recent reports suggest that UKA results in more rapid functional recovery than TKA, together with fewer complications. Few performed a comparison of bilateral simultaneous UKA and unilateral TKA. HYPOTHESIS: Bilateral simultaneous UKA would result in fewer perioperative complications, less blood loss, less transfusion and faster recovery of short-term clinical outcomes, compared with unilateral TKA patients...
August 5, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28803816/midterm-adjusted-survival-comparing-the-best-performing-unicompartmental-and-total-knee-arthroplasties-in-a-registry
#13
Stefano A Bini, Guy Cafri, Monti Khatod
BACKGROUND: Recent literature suggests that the difference in revision risk between unicompartmental knee arthroplasty (UKA) and total knee arthroplasty (TKA) can be influenced by surgeon volume and other confounders. We hypothesized that implant selection might decrease the relative risk of revision in an adjusted model. METHODS: We selected the best performing (BP) primary UKAs and TKAs performed for osteoarthritis between January 2001 and December 2012 collected through a joint replacement registry...
June 8, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28802778/cryotherapy-treatment-after-unicompartmental-and-total-knee-arthroplasty-a-review
#14
REVIEW
Morad Chughtai, Nipun Sodhi, Michael Jawad, Jared M Newman, Anton Khlopas, Anil Bhave, Michael A Mont
BACKGROUND: Cryotherapy is widely utilized to enhance recovery after knee surgeries. However, the outcome parameters often vary between studies. Therefore, the purpose of this review is to compare (1) no cryotherapy vs cryotherapy; (2) cold pack cryotherapy vs continuous flow device cryotherapy; (3) various protocols of application of these cryotherapy methods; and (4) cost-benefit analysis in patients who had unicompartmental knee arthroplasty (UKA) or total knee arthroplasty (TKA). METHODS: A search for "knee" and "cryotherapy" using PubMed, EBSCO Host, and SCOPUS was performed, yielding 187 initial reports...
July 21, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28801816/are-tkas-performed-in-high-volume-hospitals-less-likely-to-undergo-revision-than-tkas-performed-in-low-volume-hospitals
#15
Elke Jeschke, Mustafa Citak, Christian Günster, Andreas Matthias Halder, Karl-Dieter Heller, Jürgen Malzahn, Fritz Uwe Niethard, Peter Schräder, Josef Zacher, Thorsten Gehrke
BACKGROUND: High-volume hospitals have achieved better outcomes for THAs and unicompartmental knee arthroplasties (UKAs). However, few studies have analyzed implant survival after primary TKA in high-volume centers. QUESTIONS/PURPOSES: Is the risk of revision surgery higher when receiving a TKA in a low-volume hospital than in a high-volume hospital? METHODS: Using nationwide billing data of the largest German healthcare insurer for inpatient hospital treatment, we identified 45,165 TKAs in 44,465 patients insured by Allgemeine Ortskrankenkasse who had undergone knee replacement surgery between January 2012 and December 2012...
August 11, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28797877/annual-trends-in-knee-arthroplasty-and-tibial-osteotomy-analysis-of-a-national-database-in-japan
#16
Manabu Kawata, Yusuke Sasabuchi, Hiroshi Inui, Shuji Taketomi, Hiroki Matsui, Kiyohide Fushimi, Hirotaka Chikuda, Hideo Yasunaga, Sakae Tanaka
BACKGROUND: Various nationwide studies have reported differing annual trends in utilization of knee arthroplasty and tibial osteotomy. Using the Diagnosis Procedure Combination database in Japan, the present series examined annual trends and demographics in total knee arthroplasty (TKA), unicompartmental knee arthroplasty (UKA) and tibial osteotomy. METHODS: All patients were identified who underwent TKA, UKA or tibial osteotomy for osteoarthritis, osteonecrosis or rheumatoid arthritis of the knee between July 2007 and March 2015...
August 7, 2017: Knee
https://www.readbyqxmd.com/read/28781020/comparative-effectiveness-of-intra-articular-hyaluronic-acid-and-corticosteroid-injections-on-the-time-to-surgical-knee-procedures
#17
Anand R Shewale, C Lowry Barnes, Lori A Fischbach, Songthip T Ounpraseuth, Jacob T Painter, Bradley C Martin
BACKGROUND: Use of intra-articular hyaluronic acid (HA) injections to manage knee osteoarthritis (OA) remains controversial because of weak and conflicting evidence. The objective was to evaluate the effectiveness of intra-articular HA injections for knee OA management. METHODS: A nested cohort of persons with knee OA seeing a specialist was created using a 10% random sample of LifeLink Plus claims (2010-2015) to compare the risk of composite (any) knee surgical interventions, total (TKA)/unicompartmental knee arthroplasty (UKA) and TKA only among HA users and 2 comparison groups: corticosteroid (CS) users and HA/CS nonusers...
July 14, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28744756/short-term-outcome-of-unicompartmental-knee-arthroplasty-in-the-octogenarian-population
#18
Baha John Tadros, John Dabis, Roy Twyman
PURPOSE: Unicompartmental knee arthroplasty (UKA) provides significant benefits to patients with anteromedial osteoarthritis, with good long-term results. Morbidity and mortality rates are lower, and recovery is quicker. These benefits would be advantageous to the octogenarian population whom carry significant comorbidities. The primary aim was to compare the short-term functional outcome at 2 years of UKA in the octogenarian population against a stratified younger cohort of patients...
July 25, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28712797/evaluation-of-a-patient-decision-aid-for-unicompartmental-or-total-knee-arthroplasty-for-medial-knee-osteoarthritis
#19
Christopher de Jesus, Dawn Stacey, Geoffrey F Dervin
BACKGROUND: Many patients with isolated medial compartment osteoarthritis are candidates for either unicompartmental knee arthroplasty (UKA) or total knee arthroplasty (TKA). A novel patient decision aid (PDA) was developed to educate patients on both interventions and prepare them for making the decision with their surgeon. The study objective was to evaluate the acceptability and usefulness of a PDA for informing and helping patients reach a surgical preference without increasing decisional conflict...
June 17, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28697861/regional-femoral-and-tibial-radiolucency-in-cemented-unicompartmental-knee-arthroplasty-and-the-relationship-to-functional-outcomes
#20
Laura J Kleeblad, Jelle P van der List, Hendrik A Zuiderbaan, Andrew D Pearle
BACKGROUND: Femoral and tibial radiolucent lines (RLL) after unicompartmental knee arthroplasty (UKA) can be categorized in physiological and pathological radiolucencies. Although physiological tibial radiolucency is assessed extensively in literature, studies reporting femoral radiolucency are lacking. Therefore, a retrospective study was performed to assess physiological femoral RLL and its relationship to short-term functional outcomes. METHODS: A total of 352 patients were included who underwent robotic-assisted medial UKA surgery and received a fixed-bearing metal-backed cemented medial UKA...
June 19, 2017: Journal of Arthroplasty
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