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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
#1
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/29748141/short-term-functional-advantages-after-medial-unicompartmental-versus-total-knee-arthroplasty
#2
Bernd Friesenbichler, Julia F Item-Glatthorn, Vanessa Wellauer, Fabian von Knoch, Nicola C Casartelli, Nicola A Maffiuletti
BACKGROUND: There are many uncertainties about the advantages and disadvantages of using unicompartmental (UKA) versus total knee arthroplasty (TKA) to treat patients with knee osteoarthritis. It is important to have sufficient early postoperative quadriceps strength for long-term, self-reported and gait-related outcomes after knee arthroplasty, but very limited comparative data exist regarding UKA and TKA patients. METHODS: This study assessed isometric quadriceps strength, spatio-temporal gait parameters (walking speed, step length, single-limb support phase) and self-reported outcomes (pain, function, stiffness) in 18 TKA and 18 UKA patients six months after surgery, as well as in 18 healthy controls...
May 7, 2018: Knee
https://www.readbyqxmd.com/read/29747897/short-hookwire-placement-under-imaging-guidance-before-thoracic-surgery-a-review
#3
T Iguchi, T Hiraki, Y Matsui, H Fujiwara, Y Masaoka, M Uka, H Gobara, S Toyooka, S Kanazawa
During video-assisted thoracic surgery (VATS), localization is sometimes needed to detect a target lesion that is too small and/or too far from the pleura. In 1995, Kanazawa et al. developed short hookwire and suture system. Since then, this system has been placed often for selected targets before VATS in Japan. This short hookwire and suture system is a representative preoperative localization method and the placement procedure is well-established. Its placement success rates are very high (range: 97.6%-99...
May 7, 2018: Diagnostic and Interventional Imaging
https://www.readbyqxmd.com/read/29729936/single-stage-bilateral-medial-oxford-unicompartmental-knee-arthroplasty-a-case-control-study-of-perioperative-blood-loss-complications-and-functional-results
#4
Arnaud Clavé, Emeline Gauthier, Navraj S Nagra, François Fazilleau, A Anthony Le Sant, Frédéric Dubrana
BACKGROUND: The benefits and risks of a single-stage medial UKA remains a subject of debate because of the theoretically higher risk of complications and specifically blood loss. The aim of this study was to evaluate the perioperative blood loss, risks and the functional results of single-stage bilateral medial Oxford Unicompartmental Knee Arthroplasty (OUKA) compared to a standard unilateral medial OUKA procedure (control group). HYPOTHESIS: the blood loss observed during bilateral single-stage medial Oxford UKA is not different from that of the control group...
May 3, 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29728833/ftfa-change-under-valgus-stress-force-radiography-is-useful-for-evaluating-the-correctability-of-intra-articular-varus-deformity-in-uka
#5
Qidong Zhang, Juan Yue, Weiguo Wang, Yan Chen, Qichao Zhao, Wanshou Guo
OBJECTIVE: The aim of this observational study was to investigate the postoperative alignment change with Oxford unicompartmental knee arthroplasties (UKA), and clarify whether femoro-tibial facet angle (FTFA) is useful for evaluating alignment correctability with UKA. METHODS: This study evaluated 79 knees consecutive minimally invasive Oxford phase 3 UKAs performed between 2013 and 2014. Full-length weight-bearing radiographs of the lower limbs were obtained pre- and postoperatively to assess varus angle...
May 4, 2018: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29713783/a-high-rate-of-tibial-plateau-fractures-after-early-experience-with-patient-specific-instrumentation-for-unicompartmental-knee-arthroplasties
#6
A M Leenders, M G M Schotanus, R J P Wind, R A P Borghans, N P Kort
PURPOSE: Patient-specific instrumentation (PSI) for unicompartmental knee arthroplasty (UKA) has been available for a few years. However, limited literature is available on this subject. Hence, the aim of this cohort study is to evaluate the 2 years' results of our first experiences with the use of PSI in UKA. It is hypothesised that there is no advantage in rate of adverse events and in radiological and functional outcomes in comparison to literature on the conventional method. METHODS: This cohort included 129 knees of 122 patients, operated by one surgeon...
April 30, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29709523/knee-arthroplasty-patients-predicted-versus-actual-recovery-what-are-their-expectations-about-time-of-recovery-following-surgery-and-how-long-before-they-can-do-the-tasks-they-want-to-do
#7
Karen L Barker, Erin Hannink, Sam Pemberton, Cathy Jenkins
OBJECTIVE: (1) To determine evidence-based guidance for the length of time to return to specific valued functional and leisure activities following knee arthroplasty (KA). (2) To determine what patients feel are the most important functional or leisure activities to recover after KA. (3) To collect information about patients' expectations and compare them to the actual time it takes to return. DESIGN: Prospective longitudinal cohort observational survey SETTING: Specialist orthopaedic hospital PARTICIPANTS: 99 patients with osteoarthritis or rheumatoid arthritis (mean= 69...
April 27, 2018: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/29691172/revision-of-unicompartmental-knee-arthroplasty-to-total-knee-arthroplasty-is-it-as-good-as-a-primary-result
#8
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/29685501/effect-of-femoral-component-position-on-biomechanical-outcomes-of-unicompartmental-knee-arthroplasty
#9
Kyoung-Tak Kang, Juhyun Son, Yong-Gon Koh, Oh-Ryong Kwon, Sae Kwang Kwon, Yong Jun Lee, Kwan Kyu Park
BACKGROUND: The positions of unicompartmental femoral components do not always follow the neutral center of the medial distal femoral condyle. The biomechanical effect of the center of the distal femoral condyle has not yet been evaluated, and the optimal femoral position in unicompartmental knee arthroplasty (UKA) is yet to be biomechanically justified. The purpose of this study was to evaluate, using finite element analysis, the effect of the center of the distal femoral component on the biomechanical outcomes of UKA with respect to the contact stresses in the polyethylene (PE) insert and articular cartilage...
April 20, 2018: Knee
https://www.readbyqxmd.com/read/29685499/how-does-the-inclination-of-the-tibial-component-matter-a-three-dimensional-finite-element-analysis-of-medial-mobile-bearing-unicompartmental-arthroplasty
#10
Xuesong Dai, Jinghua Fang, Lifeng Jiang, Yan Xiong, Miaofeng Zhang, Sunan Zhu
BACKGROUND: Medial unicompartmental knee arthroplasty (UKA) using Oxford mobile-bearing prosthesis is performed in the treatment of medial compartmental arthritis of the knee. However, little is known about the stress distributions for mobile-bearing UKA on the medial tibial plateau. METHODS: In this study, the stresses on the coronal plane were calculated in a three-dimensional model of the proximal tibia. The features of the stress distribution were investigated when the tibial tray was placed in 15°, 10°, six degrees, and three degrees varus, neutral (0°), and in three degrees, six degrees, 10°, and 15° valgus on the coronal plane of the medial plateau...
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/29680583/pros-and-cons-a-balanced-view-of-robotics-in-knee-arthroplasty
#12
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/29674152/identification-and-functional-analysis-of-the-aspergillic-acid-gene-cluster-in-aspergillus-flavus
#13
Matthew D Lebar, Jeffrey W Cary, Rajtilak Majumdar, Carol H Carter-Wientjes, Brian M Mack, Qijian Wei, Valdet Uka, Sarah De Saeger, José Diana Di Mavungu
Aspergillus flavus can colonize important food staples and produce aflatoxins, a group of toxic and carcinogenic secondary metabolites. Previous in silico analysis of the A. flavus genome revealed 56 gene clusters predicted to be involved in the biosynthesis of secondary metabolites. A. flavus secondary metabolites produced during infection of maize seed are of particular interest, especially with respect to their roles in the biology of the fungus. A predicted nonribosomal peptide synthetase-like (NRPS-like) gene, designated asaC (AFLA_023020), present in the uncharacterized A...
April 16, 2018: Fungal Genetics and Biology: FG & B
https://www.readbyqxmd.com/read/29665764/unicompartmental-knee-arthroplasty-for-spontaneous-osteonecrosis-of-the-knee-a-meta-analysis
#14
Julio J Jauregui, Christopher L Blum, Neil Sardesai, Craig Bennett, R Frank Henn, Farshad Adib
BACKGROUND: Spontaneous osteonecrosis of the knee (SONK) is a poorly understood but debilitating disease entity. Total knee arthroplasty (TKA) is the standard of care for those patients who fail conservative management, but considering SONK's predilection for affecting a single knee compartment, unicompartmental knee arthroplasty (UKA) appears to be a more tailored option. Unfortunately, conflicting data exist on the utility of UKA in SONK. Thus, the purpose of this study was to evaluate functional outcomes and revision rates of UKA in the setting of SONK...
May 2018: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/29663012/medial-joint-line-elevation-of-the-tibia-measured-during-surgery-has-a-significant-correlation-with-the-limb-alignment-changes-following-medial-unicompartmental-knee-arthroplasty
#15
Yuichi Kuroda, Koji Takayama, Kazunari Ishida, Shinya Hayashi, Shingo Hashimoto, Masanori Tsubosaka, Takehiko Matsushita, Takahiro Niikura, Kotaro Nishida, Ryosuke Kuroda, Tomoyuki Matsumoto
PURPOSE: This study aimed to determine the correlation between the change in joint line height calculated from the resected bone and insert thickness during surgery and the change in limb alignment following unicompartmental knee arthroplasty (UKA). It was hypothesized that joint line elevation is correlated with the change in limb alignment. METHODS: A total of 74 consecutive patients diagnosed with either isolated medial compartmental osteoarthritis (38 patients) or spontaneous osteonecrosis of the knee (36 patients) were included...
April 16, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29657839/current-concepts-for-aligning-knee-implants-patient-specific-or-systematic
#16
REVIEW
Charles Rivière, Stefan Lazic, Oliver Boughton, Yann Wiart, Loic Vïllet, Justin Cobb
Mechanical or anatomical alignment techniques create a supposedly 'biomechanically friendly' but often functionally limited prosthetic knee.Alternative techniques for alignment in total knee arthroplasty (TKA) aim at being more anatomical and patient-specific, aiming to improve functional outcomes after TKA.The kinematic alignment (KA) technique for TKA has shown good early clinical outcomes. Its role in extreme anatomical variation remains to be defined.The restricted KA technique for TKA might be a reasonable option for patients with extreme anatomical variation...
January 2018: EFORT Open Reviews
https://www.readbyqxmd.com/read/29656978/high-rate-of-early-revision-after-iuni-custom-made-unicondylar-knee-arthroplasty
#17
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/29629588/reliable-outcomes-and-survivorship-of-unicompartmental-knee-arthroplasty-for-isolated-compartment-osteonecrosis
#18
B P Chalmers, K G Mehrotra, R J Sierra, M W Pagnano, M J Taunton, M P Abdel
Aims Primary (or spontaneous) and secondary osteonecrosis of the knee can lead to severe joint degeneration, for which either total or unicompartmental arthroplasty may be considered. However, there are limited studies analyzing outcomes of unicompartmental knee arthroplasties (UKAs) for osteonecrosis involving an isolated compartment of the knee. The aims of this study were to analyze outcomes of UKAs for osteonecrosis with specific focus on 1) survivorship free of any revision or reoperation, 2) risk factors for failure, 3) clinical outcomes, and 4) complications...
April 1, 2018: Bone & Joint Journal
https://www.readbyqxmd.com/read/29629577/usage-of-unicompartmental-knee-arthroplasty
#19
D W Murray, R W Parkinson
Unicompartmental knee arthroplasty (UKA) has numerous advantages over total knee arthroplasty (TKA) and one disadvantage, the higher revision rate. The best way to minimize the revision rate is for surgeons to use UKA for at least 20% of their knee arthroplasties. To achieve this, they need to learn and apply the appropriate indications and techniques. This would decrease the revision rate and increase the number of UKAs which were implanted, which would save money and patients would benefit from improved outcomes over their lifetime...
April 1, 2018: Bone & Joint Journal
https://www.readbyqxmd.com/read/29627257/robotic-arm-assisted-vs-conventional-unicompartmental-knee-arthroplasty-the-2-year-clinical-outcomes-of-a-randomized-controlled-trial
#20
Alisdair Gilmour, Angus D MacLean, Philip J Rowe, Matthew S Banger, Iona Donnelly, Bryn G Jones, Mark J G Blyth
BACKGROUND: Unicompartmental knee arthroplasty (UKA) for treatment of medial compartment osteoarthritis has potential benefits over total knee arthroplasty but UKA has a higher revision rate. Robotic-assisted UKA is increasingly common and offers more accurate implant positioning and limb alignment, lower early postoperative pain but evidence of functional outcome is lacking. The aim was to assess the clinical outcomes of a single-centre, prospective, randomised controlled trial, comparing robotic-arm-assisted UKA with conventional surgery...
February 21, 2018: Journal of Arthroplasty
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