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Unicondylar knee arthroplasty

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https://www.readbyqxmd.com/read/29776853/outcomes-of-a-fixed-bearing-medial-cemented-unicondylar-knee-arthroplasty-design-survival-analysis-and-functional-score-of-460-cases
#1
Philip Winnock de Grave, Justine Barbier, Thomas Luyckx, Alexander Ryckaert, Paul Gunst, Luc Van den Daelen
BACKGROUND: Unicompartmental knee arthroplasty (UKA) is an alternative to total knee arthroplasty in isolated medial osteoarthritis (OA). However, despite satisfactory reports on the clinical performance, UKA revision rates are still concerning. This retrospective study reports on the long-term survivorship, functional outcomes, and reasons for revision in fixed-bearing UKA implant. METHODS: Between 2005 and 2013, 460 consecutive patients were treated with medial UKA in one center using a fixed-bearing UKA system...
April 24, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29773404/large-tibial-geode-which-developed-several-years-after-a-left-medial-oxford-unicondylar-knee-arthroplasty-treated-with-curettage-and-bone-grafting
#2
Matthew K Curran, James R Murray
BACKGROUND: Tibial geodes are rare, and usually reported in association with rheumatoid arthritis. This case study reported the rare occurrence of a tibial geode in association with a left unicondylar knee arthroplasty (UKA). The patient, a 55-year-old male, was initially pleased with his UKA, which was performed at another institution. However, just over one year after the operation he began experiencing pain and discomfort. He did not present to the current institution until he was six years after UKA...
May 14, 2018: Knee
https://www.readbyqxmd.com/read/29660385/pre-operative-asymptomatic-bacteriuria-a-risk-factor-for-prosthetic-joint-infection
#3
R Weale, F El-Bakri, Kordo Saeed
BACKGROUND: Infection is a rare complication following implantation of prosthetic material into a joint. The impact of asymptomatic bacteriuria (ASB) before elective operations and the subsequent risk of prosthetic joint infection (PJI) are not well understood. AIMS: • Assess the prevalence of ASB amongst patients undergoing total arthroplasty of the hip and knee. • Determine the rates of PJI diagnosed within two years of the arthroplasty and if ASB is an independent risk factor for developing PJI...
April 13, 2018: Journal of Hospital Infection
https://www.readbyqxmd.com/read/29656978/high-rate-of-early-revision-after-iuni-custom-made-unicondylar-knee-arthroplasty
#4
Carl T Talmo, Marie C Anderson, Eliot S Jia, Claire E Robbins, Jason D Rand, Brian P McKeon
BACKGROUND: There has been a recent interest in custom-made partial knee arthroplasties to provide patient-specific instrumentation and better fit of the prosthesis. While unicondylar knee arthroplasties (UKAs) have demonstrated good outcomes and durable results in many studies, there is little evidence on outcomes of these custom-made implants. METHODS: We performed a retrospective review of all custom-made UKAs performed at our institution by one surgeon from 2008 to 2015...
March 15, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29649670/the-influence-of-the-twin-peg-design-on-femoral-interface-temperature-and-maximum-load-to-failure-in-cemented-oxford-unicompartmental-knee-arthroplasty
#5
Tobias Reiner, Martin Schwarze, Benjamin Panzram, Matthias C Klotz, Rudi G Bitsch, Sebastian Jaeger
BACKGROUND: The twin peg femoral component was introduced for the cemented Oxford unicondylar knee to increase implant stability. The aim of this experimental study was to investigate the influence of the twin peg design on femoral interface temperature and maximum load to failure in comparison to the single peg design. METHODS: In this experimental study medial Oxford unicompartmental knee arthroplasty was performed in 12 pairs of fresh-frozen human knees. A cemented femoral single peg component was implanted on the one side (group A) and a cemented twin peg component on the other side (group B)...
April 5, 2018: Clinical Biomechanics
https://www.readbyqxmd.com/read/29494465/elimination-of-preoperative-flexion-contracture-as-a-contraindication-for-unicompartmental-knee-arthroplasty
#6
Richard L Purcell, John P Cody, Deborah J Ammeen, Nitin Goyal, Gerard A Engh
INTRODUCTION: Unicompartmental knee arthroplasty (UKA) is an effective alternative to total knee arthroplasty (TKA) for the management of unicondylar osteoarthritis. Historical contraindications limit patients' eligibility for UKA. However, recent reports have suggested that some contraindications may not be absolute. This study evaluates preoperative flexion contracture with regard to UKA. METHODS: This study was a retrospective review of 53 patients with preoperative flexion contracture between 11° and 20° who underwent fixed-bearing UKA and a matched cohort of 53 patients who underwent cruciate-retaining TKA...
April 1, 2018: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/29484928/comparison-of-gait-kinetics-in-total-and-unicondylar-knee-replacement-surgery
#7
COMPARATIVE STUDY
S Miller, A Agarwal, W B Haddon, L Johnston, G Arnold, W Wang, R J Abboud
Introduction The aim of this study was to compare kinetical data from gait analysis of patients who have undergone total and uni-condylar knee replacement. Materials and methods Thirteen patients with unilateral total knee arthroplasty (TKA) and 13 unicondylar knee arthroplasty (UKA), were included, all performed by the same surgeon more than one year prior. The Vicon gait analysis system was used. Statistical power was calculated using SPSS. Results No significant difference was found in the spatiotemporal parameters of gait and survival years of the knee prosthesis between the two groups...
April 2018: Annals of the Royal College of Surgeons of England
https://www.readbyqxmd.com/read/29465474/smartphone-technology-a-reliable-and-valid-measure-of-knee-movement-in-knee-replacement
#8
Hannah Castle, Kon Kozak, Aman Sidhu, Riaz J K Khan, Samantha Haebich, Vanessa Bowden, Daniel P Fick, Hari Goonatillake
Knee range of motion (ROM) following a knee arthroplasty is an important clinical outcome that directly relates to the patient's physical function. Smartphone technology has led to the creation of applications that can measure ROM. The aim was to determine the concurrent reliability and validity of the photo-based application 'Dr Goniometer' (DrG) compared with a universal goniometer performed by a clinician. A smartphone camera was used to take photographs of the knee in full flexion and full extension, and the images were sent by participants to a study phone...
June 2018: International Journal of Rehabilitation Research. Revue Internationale de Recherches de Réadaptation
https://www.readbyqxmd.com/read/29305449/mid-term-results-of-lateral-unicondylar-mobile-bearing-knee-arthroplasty-a-multicentre-study-of-363-cases
#9
MULTICENTER STUDY
T Walker, N Zahn, T Bruckner, M R Streit, G Mohr, P R Aldinger, M Clarius, T Gotterbarm
AIMS: The aim of this independent multicentre study was to assess the mid-term results of mobile bearing unicondylar knee arthroplasty (UKA) for isolated lateral osteoarthritis of the knee joint. PATIENTS AND METHODS: We retrospectively evaluated 363 consecutive, lateral UKAs (346 patients) performed using the Oxford domed lateral prosthesis undertaken in three high-volume knee arthroplasty centres between 2006 and 2014. Mean age of the patients at surgery was 65 years (36 to 88) with a mean final follow-up of 37 months (12 to 93) RESULTS: A total of 36 (10...
January 2018: Bone & Joint Journal
https://www.readbyqxmd.com/read/29246134/influence-of-the-anterior-notch-in-mobile-bearing-uka-on-patellofemoral-radiotracer-uptake-and-clinical-outcome
#10
Dietmar Dammerer, Michael Liebensteiner, Hannes Rochau, Christian Uprimny, Vinzenz Smekal, Ralf Rosenberger, Elvire Servien
BACKGROUND: Previous studies reported that in partial knee arthroplasty smooth transitions to the remaining native parts of the knee are important. However, in mobile-bearing unicondylar knee arthroplasty (UKA) it is mandatory to create an anterior osteochondral notch adjacent to the femoral component to get clearance for the anterior lip of the bearing in full knee extension. This notch is, however, part of the femoral trochlea. It was the aim of the study to test for a potential association between a) an obligatory anterior notch in mobile-bearing UKA located at the margin of the medial aspect of the femoral trochlea and b) postoperative patellofemoral joint (PFJ) bone remodelling and discomfort...
December 16, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29153864/changes-in-markers-of-thrombin-generation-and-interleukin-6-during-unicondylar-knee-and-total-knee-arthroplasty
#11
Edwin P Su, Lauren E Mount, Allina A Nocon, Thomas P Sculco, George Go, Nigel E Sharrock
BACKGROUND: Total knee arthroplasty (TKA) is associated with a risk of thromboembolism requiring routine thromboprophylaxis, but there is debate about the risk with unicondylar knee arthroplasty (UKA) as it is a more minor procedure. We sought to investigate the relative risk of thromboembolism with UKA compared to TKA and one-staged bilateral TKA (BTKA) by measuring the increase in circulating biochemical markers of thrombin generation during the procedures. Degree of surgical trauma was also assessed by measuring interleukin-6, a marker of metabolic injury...
March 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29135670/in-early-bilateral-medial-compartment-arthritis-unicondylar-and-total-knee-arthroplasty-resulted-in-similar-improvements-in-patient-reported-outcomes-at-2-years
#12
Daniel C Wascher
No abstract text is available yet for this article.
November 15, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29124363/reduced-joint-awareness-in-bicruciate-retaining-total-knee-arthroplasty-compared-to-cruciate-sacrificing-total-knee-arthroplasty
#13
Florian Baumann, Werner Krutsch, Michael Worlicek, Maximilian Kerschbaum, Johannes Zellner, Paul Schmitz, Michael Nerlich, Carsten Tibesku
PURPOSE: There is rising impact of patient-reported outcome (PRO) measurement in joint arthroplasty over the past years. Bicruciate-retaining implants have shown more physiologic knee kinematics and provide superior proprioceptive capacities. The aim of this study was to evaluate if the functional properties of this new implant design lead to improved PRO results after total knee arthroplasty (TKA). METHODS: This prospective, controlled trial compares PRO of bicruciate-retaining total knee arthroplasty (BCR-TKA) to unicondylar knee arthroplasty (UKA) and standard posterior-stabilized total knee arthroplasty (PS-TKA)...
February 2018: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28860683/simultaneous-ipsilateral-knee-arthroscopy-and-unicondylar-knee-arthroplasty-is-effective-for-bicompartmental-symptoms
#14
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/28834999/-impact-of-case-numbers-on-the-5-year-survival-rate-of-unicondylar-knee-replacements-in-germany
#15
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...
February 2018: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/28522245/pin-site-complications-associated-with-computer-assisted-navigation-in-hip-and-knee-arthroplasty
#16
Eli Kamara, Zachary P Berliner, Matthew S Hepinstall, H John Cooper
BACKGROUND: There has been a great increase in the use of navigation technology in joint arthroplasty. In most types of navigation-assisted surgery, several temporary navigation pins are placed in the patient. Goals of this study are (1) to identify complications and (2) risk factors associated with placement of these pins. METHODS: This is a retrospective cohort study of all navigation-assisted hip and knee arthroplasty performed a single institution over a 3-year period...
April 20, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28360489/unicondylar-knee-arthroplasty-key-concepts
#17
REVIEW
Mohamad J Halawi, Wael K Barsoum
The concept of unicondylar knee arthroplasty (UKA) has been described as early as 1950s following the introduction of the MacIntosh and McKeever hemiarthroplasty. With improvements in implant design, patient selection, and surgical technique, there has been an increase in utilization of UKA as a less-invasive alternative to total joint arthroplasty for the treatment of localized symptomatic osteoarthritis. The purpose of this review article is to highlight five trending concepts in UKA based on current evidence: bearing design, fixation technique, medial vs...
January 2017: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/28251284/the-pertinent-question-in-treatment-of-unicompartmental-osteoarthritis-of-the-knee-high-tibial-osteotomy-or-unicondylar-knee-arthroplasty-or-total-knee-arthroplasty
#18
EDITORIAL
Roland Becker, Michael Hirschmann
No abstract text is available yet for this article.
March 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28160030/-fixed-bearing-unicondylar-arthroplasty-in-medial-osteoarthritis-of-the-knee
#19
R Becker, C Paech, A Denecke
OBJECTIVE: The unicondylar prosthesis replaces the medial femerotibial compartment only, the part presenting with osteoarthritic changes. The remaining compartments of the knee present less osteoarthritic changes and thus can be preserved. INDICATIONS: Osteoarthritis of the medial femorotibial compartment is the ideal indication for unicondylar arthroplasty. The knee should show an intraarticular deformity, which means the malalignment is caused by the osteoarthritic changes of the medial compartment...
February 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28078394/kinematics-of-a-bicruciate-retaining-total-knee-arthroplasty
#20
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...
June 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
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