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https://www.readbyqxmd.com/read/28330757/does-new-instrumentation-improve-radiologic-alignment-of-the-oxford%C3%A2-medial-unicompartmental-knee-arthroplasty
#1
Ki-Mo Jang, Hong Chul Lim, Seung-Beom Han, Chandong Jeong, Seul-Gi Kim, Ji-Hoon Bae
BACKGROUND: A new instrument system has been introduced to improve the accuracy and reproducibility of implant positioning in Oxford® unicompartmental knee arthroplasty (UKA). This study aimed to determine if the new instrumentation could improve postoperative implant positioning and limb alignment, and reduce the occurrence of outliers in Oxford® UKA. METHODS: A total of 77 cases of Oxford® UKA with the new instrumentation were included. Individual matching for the conventional instrument group was performed according to age, sex, and body mass index...
March 19, 2017: Knee
https://www.readbyqxmd.com/read/28319262/ethnic-familial-and-religious-identity-of-roma-adolescents-in-bulgaria-czech-republic-kosovo-and-romania-in-relation-to-their-level-of-well-being
#2
Radosveta Dimitrova, Fons J R van de Vijver, Jitka Taušová, Athanasios Chasiotis, Michael Bender, Carmen Buzea, Fitim Uka, Ergyul Tair
This study examines ethnic, national, familial, and religious identity and well-being of 632 Roma minority and 589 majority adolescents (age: M = 15.98 years, SD = 1.34) in Bulgaria, the Czech Republic, Kosovo, and Romania. Results indicated that Roma showed lower endorsement of national identity but stronger religious identity than their majority counterparts. Path models showed positive associations of familial and religious identities with well-being, whereas Roma identity was negatively associated with well-being, particularly for Roma in Bulgaria and Kosovo (countries with a less active policy toward improving conditions of Roma)...
March 20, 2017: Child Development
https://www.readbyqxmd.com/read/28299718/have-the-causes-of-revision-for-total-and-unicompartmental-knee-arthroplasties-changed-during-the-past-two-decades
#3
Gro S Dyrhovden, Stein Håkon L Lygre, Mona Badawy, Øystein Gøthesen, Ove Furnes
BACKGROUND: Revisions after knee arthroplasty are expected to increase, and the epidemiology of failure mechanisms is changing as new implants, technology, and surgical techniques evolve. QUESTIONS/PURPOSES: (1) Was there improvement in survival for TKA and unicompartmental knee arthroplasty (UKA) when comparing two consecutive 11-year periods with similar followups in a national registry? (2) Were there changes in the causes of revision during the two times? (3) Could the changes in revision causes be attributed to patient or implant characteristics? METHODS: A total of 60,623 TKAs (2426 revisions) and 7648 UKAs (725 revisions) were selected from the Norwegian Arthroplasty Register and analyzed based on year of primary surgery: 1994 to 2004 (Period 1) and 2005 to 2015 (Period 2)...
March 15, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28254376/preoperative-patellofemoral-chondromalacia-is-not-a-contraindication-for-fixed-bearing-medial-unicompartmental-knee-arthroplasty
#4
Alexander J Adams, Gregory S Kazarian, Jess H Lonner
BACKGROUND: Patellofemoral chondromalacia (PFCM) has historically been considered a contraindication for unicompartmental knee arthroplasty (UKA), but there is limited data assessing PFCM's impact on the results of fixed-bearing UKA. Our objective was to assess the impact of medial patellar and/or medial trochlear PFCM on overall and patellofemoral-specific 2-year outcomes after fixed-bearing medial UKA. METHODS: Intraoperative notes defined the presence and location of PFCM during fixed bearing medial UKA...
January 16, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28229182/outpatient-unicompartmental-knee-arthroplasty-who-is-afraid-of-outpatient-surgery
#5
Alexander Hoorntje, Koen L M Koenraadt, Margreet G Boevé, Rutger C I van Geenen
PURPOSE: In recent years, duration of hospitalisation after knee arthroplasty has decreased and fast track and outpatient surgery protocols have been developed. Studies have shown that outpatient surgery is feasible, safe, and cost effective. However, the psychological well-being of patients undergoing outpatient surgery has never been described before. The purpose of this study was to investigate how patients experience outpatient surgery for unicompartmental knee arthroplasty (UKA), examining levels of anxiety and depression, satisfaction, and pain...
March 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28220190/open-wedge-high-tibial-osteotomy-versus-unicompartmental-knee-arthroplasty-no-difference-in-progression-of-patellofemoral-joint-arthritis
#6
Kwang-Jun Oh, Young Chan Kim, Jong Seong Lee, Yong Suk Chang, Gautam M Shetty, Kyung Wook Nha
PURPOSE: The purpose of this retrospective comparative study was to evaluate and compare, radiographically and clinically, progression of osteoarthritis (OA) in the patellofemoral (PF) compartment after open-wedge high tibial osteotomy (OWHTO), and unicompartmental knee arthroplasty (UKA) over a minimum follow-up of 5 years. METHODS: In this study, 42 knees in an OWHTO group were compared with 59 knees in a UKA group in terms of radiographic parameters, such as the grading system for OA progression in the PF compartment, and clinical parameters, such as the PF pain and function scores over a minimum follow-up of 5 years...
March 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28215968/unicompartmental-knee-arthroplasty-vs-total-knee-arthroplasty-for-medial-compartment-arthritis-in-patients-older-than-75-years-comparable-reoperation-revision-and-complication-rates
#7
Homayoun Siman, Atul F Kamath, Nazly Carrillo, William S Harmsen, Mark W Pagnano, Rafael J Sierra
BACKGROUND: Prior studies comparing unicompartmental knee arthroplasty (UKA) with total knee arthroplasty (TKA) in the elderly are limited by heterogeneity in arthritic disease patterns and patient selection. We report the results of UKA and TKA in patients 75 years and older with isolated medial compartmental arthritis, with special emphasis on immediate postoperative recovery, complications, reoperation rates, and implant survivorship at midterm follow-up. METHODS: A retrospective review was performed of all patients 75 years and older who underwent UKA or TKA at our institution between 2002 and 2012...
January 24, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28208799/microbial-detoxification-of-deoxynivalenol-don-assessed-via-a-lemna-minor-l-bioassay-through-biotransformation-to-3-epi-don-and-3-epi-dom-1
#8
Ilse Vanhoutte, Laura De Mets, Marthe De Boevre, Valdet Uka, José Diana Di Mavungu, Sarah De Saeger, Leen De Gelder, Kris Audenaert
Mycotoxins are toxic metabolites produced by fungi. To mitigate mycotoxins in food or feed, biotransformation is an emerging technology in which microorganisms degrade toxins into non-toxic metabolites. To monitor deoxynivalenol (DON) biotransformation, analytical tools such as ELISA and liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) are typically used. However, these techniques do not give a decisive answer about the remaining toxicity of possible biotransformation products. Hence, a bioassay using Lemna minor L...
February 13, 2017: Toxins
https://www.readbyqxmd.com/read/28185777/survivorship-and-patient-satisfaction-of-robotic-assisted-medial-unicompartmental-knee-arthroplasty-at-a-minimum-two-year-follow-up
#9
Andrew D Pearle, Jelle P van der List, Lily Lee, Thomas M Coon, Todd A Borus, Martin W Roche
BACKGROUND: Successful clinical outcomes following unicompartmental knee arthroplasty (UKA) depend on lower limb alignment, soft tissue balance and component positioning, which can be difficult to control using manual instrumentation. Although robotic-assisted surgery more reliably controls these surgical factors, studies assessing outcomes of robotic-assisted UKA are lacking. Therefore, a prospective multicenter study was performed to assess outcomes of robotic-assisted UKA. METHODS: A total of 1007 consecutive patients (1135 knees) underwent robotic-assisted medial UKA surgery from six surgeons at separate institutions between March 2009 and December 2011...
February 6, 2017: Knee
https://www.readbyqxmd.com/read/28176602/comparison-of-hto-with-articular-cartilage-surgery-and-uka-in-unicompartmental-oa
#10
Yoon Sang Jeon, Chi Hoon Ahn, Myung-Ku Kim
PURPOSE: The purpose of this article was to assess the clinical outcome of high tibial osteotomy (HTO) with articular cartilage surgery compared with unicompartmental knee arthroplasty (UKA) in unicompartmental osteoarthritis (OA). METHODS: We designed retrospective study and evaluated 47 patients with unicompartmental OA (Kellgren-Laurence [K-L] grade ≥III OA). Two groups of patients underwent either HTO with articular cartilage surgery or UKA by the senior author between January 2010 and April 2013...
January 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28149893/is-the-revision-of-a-primary-tka-really-as-easy-and-safe-as-the-revision-of-a-primary-uka
#11
COMMENT
Kevin Staats, Christian Merle, Tom Schmidt-Braekling, Friedrich Boettner, Reinhard Windhager, Wenzel Waldstein
No abstract text is available yet for this article.
December 2016: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28110847/improved-survival-of-computer-assisted-unicompartmental-knee-arthroplasty-252-cases-with-a-minimum-follow-up-of-5-years
#12
Majid Chowdhry, Raghbir S Khakha, Mark Norris, Amin Kheiran, Sandeep K Chauhan
BACKGROUND: Unicompartmental knee arthroplasty (UKA) is an underutilized implant for medial tibiofemoral arthritis despite proven benefits in performance and reduced complications. This is likely related to registry recorded higher revision rates compared with total knee arthroplasty. It is our feeling that better component alignment resulting from the usage of computer-assisted surgery should improve longer-term functional results and survival of UKAs. METHODS: Between August 2003 and June 2007, 265 medial UKAs were performed in 264 consecutive patients using navigation...
November 23, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28099301/unicompartmental-knee-arthroplasty-provides-higher-activity-and-durability-than-valgus-producing-proximal-tibial-osteotomy-at-5-to-7-years
#13
Aaron J Krych, Patrick Reardon, Paul Sousa, Ayoosh Pareek, Michael Stuart, Mark Pagnano
BACKGROUND: The cases of patients with medial compartment osteoarthritis who were ≤55 years old and had a proximal tibial osteotomy (PTO) or medial unicompartmental knee arthroplasty (UKA) were compared. Outcomes included postoperative activity level, function, and survivorship free of revision to total knee arthroplasty. METHODS: Between 1998 and 2013, data were available for 240 patients between 18 and 55 years old with medial compartment arthritis and varus malalignment who were treated either with PTO (57 patients) or with UKA (183 patients)...
January 18, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28098779/unravelling-the-diversity-of-the-cyclopiazonic-acid-family-of-mycotoxins-in-aspergillus-flavus-by-uhplc-triple-tof-hrms
#14
Valdet Uka, Geromy G Moore, Natalia Arroyo-Manzanares, Dashnor Nebija, Sarah De Saeger, José Diana Di Mavungu
Cyclopiazonic acid (α-cyclopiazonic acid, α-CPA) is an indole-hydrindane-tetramic acid neurotoxin produced by various fungal species, including the notorious food and feed contaminant Aspergillus flavus. Despite its discovery in A. flavus cultures approximately 40 years ago, its contribution to the A. flavus mycotoxin burden is consistently minimized by our focus on the more potent carcinogenic aflatoxins also produced by this fungus. Here, we report the screening and identification of several CPA-type alkaloids not previously found in A...
January 13, 2017: Toxins
https://www.readbyqxmd.com/read/28077394/metal-backed-versus-all-polyethylene-unicompartmental-knee-arthroplasty-proximal-tibial-strain-in-an-experimentally-validated-finite-element-model
#15
C E H Scott, M J Eaton, R W Nutton, F A Wade, S L Evans, P Pankaj
OBJECTIVES: Up to 40% of unicompartmental knee arthroplasty (UKA) revisions are performed for unexplained pain which may be caused by elevated proximal tibial bone strain. This study investigates the effect of tibial component metal backing and polyethylene thickness on bone strain in a cemented fixed-bearing medial UKA using a finite element model (FEM) validated experimentally by digital image correlation (DIC) and acoustic emission (AE). MATERIALS AND METHODS: A total of ten composite tibias implanted with all-polyethylene (AP) and metal-backed (MB) tibial components were loaded to 2500 N...
January 2017: Bone & Joint Research
https://www.readbyqxmd.com/read/28067099/dynamic-rsa-for-the-evaluation-of-inducible-micromotion-of-oxford-uka-during-step-up-and-step-down-motion
#16
Kristian Horsager, Bart L Kaptein, Lone RøMer, Peter B Jørgensen, Maiken Stilling
Background and purpose - Implant inducible micromotions have been suggested to reflect the quality of the fixation interface. We investigated the usability of dynamic RSA for evaluation of inducible micromotions of the Oxford Unicompartmental Knee Arthroplasty (UKA) tibial component, and evaluated factors that have been suggested to compromise the fixation, such as fixation method, component alignment, and radiolucent lines (RLLs). Patients and methods - 15 patients (12 men) with a mean age of 69 (55-86) years, with an Oxford UKA (7 cemented), were studied after a mean time in situ of 4...
January 9, 2017: Acta Orthopaedica
https://www.readbyqxmd.com/read/28065624/outcome-of-unicondylar-knee-arthroplasty-vs-total-knee-arthroplasty-for-early-medial-compartment-arthritis-a-randomized-study
#17
Vikas Kulshrestha, Barun Datta, Santhosh Kumar, Gaurav Mittal
BACKGROUND: With increasing number of patients with early osteoarthritis of knee opting for total knee arthroplasty (TKA), there has been increase in patients dissatisfied with surgical outcomes. It is being presumed that offering unicondylar knee arthroplasty (UKA) to them would improve outcomes. METHODS: Primary objective of our study was to look for any difference in patient-reported outcome and function at 2-year follow-up in patients undergoing UKA as compared to TKA...
December 23, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28060788/outpatient-total-hip-arthroplasty-total-knee-arthroplasty-and-unicompartmental-knee-arthroplasty-a-systematic-review-of-the-literature
#18
Michael Pollock, Lyndsay Somerville, Andrew Firth, Brent Lanting
BACKGROUND: The demand for total hip arthroplasty (THA), total knee arthroplasty (TKA), and unicompartmental knee arthroplasty (UKA) is growing rapidly because of the proven success of these procedures and an increase in the aging population. However, resources are limited and health-care budgets are finite. Recently, a number of care providers have started performing these procedures on an outpatient basis, with the patients being discharged from the hospital on the day of surgery. The primary objective of this systematic review was to examine the evidence regarding the safety and feasibility of performing THA, TKA, or UKA on an outpatient basis...
December 27, 2016: JBJS Reviews
https://www.readbyqxmd.com/read/28056570/different-incidences-of-knee-arthroplasty-in-the-nordic-countries
#19
Mika J NiemeläInen, Keijo T MäKelä, Otto Robertsson, Annette W-Dahl, Ove Furnes, Anne M Fenstad, Alma B Pedersen, Henrik M Schrøder, Heini Huhtala, Antti Eskelinen
Background and purpose - The annual number of total knee arthroplasties (TKAs) has increased worldwide in recent years. To make projections regarding future needs for primaries and revisions, additional knowledge is important. We analyzed and compared the incidences among 4 Nordic countries Patients and methods - Using Nordic Arthroplasty Register Association (NARA) data from 4 countries, we analyzed differences between age and sex groups. We included patients over 30 years of age who were operated with TKA or unicompartmental knee arthroplasty (UKA) during the period 1997-2012...
January 6, 2017: Acta Orthopaedica
https://www.readbyqxmd.com/read/28053251/bias-and-unicompartmental-knee-arthroplasty
#20
REVIEW
D W Murray, A D Liddle, A Judge, H Pandit
We recently published a paper comparing the incidence of adverse outcomes after unicompartmental and total knee arthroplasty (UKA and TKA). The conclusion of this study, which was in favour of UKA, was dismissed as "biased" in a review in Bone & Joint 360 Although this study is one of the least biased comparisons of UKA and TKA, this episode highlights the biases that exist both for and against UKA. In this review, we explore the different types of bias, particularly selection, reporting and measurement. We conclude that comparisons between UKA and TKA are open to bias...
January 2017: Bone & Joint Journal
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