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Unicompartmental knee arthroplasty

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https://www.readbyqxmd.com/read/29147743/low-implant-migration-of-the-sigma-%C3%A2-medial-unicompartmental-knee-arthroplasty
#1
Daan Koppens, Maiken Stilling, Stig Munk, Jesper Dalsgaard, Søren Rytter, Ole Gade Sørensen, Torben Bæk Hansen
PURPOSE: The purpose of this study was to evaluate implant migration of the fixed-bearing Sigma(®) medial unicompartmental knee arthroplasty (UKA). UKA is a regularly used treatment for patients with medial osteoarthritis (OA) of the knee. UKA has a higher revision rate than total knee arthroplasty. Implant migration can be used as a predictor of implant loosening. METHODS: A prospective radiostereometric cohort study was performed. Forty-five patients with medial OA of the knee were included and received a cemented Sigma(®) UKA...
November 16, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29145987/outpatient-total-knee-arthroplasty-are-we-there-yet-part-2
#2
REVIEW
Andrew Krause, Zain Sayeed, Mouhanad El-Othmani, Vinay Pallekonda, William Mihalko, Khaled J Saleh
The method by which surgeons conduct outpatient total knee procedures has yet to be fully elucidated. Literature demonstrates different experiences from various care protocols in place across the nation. This article reviews current recommendations for implementing successful total knee arthroplasty (TKA) and unicompartmental knee arthroplasty outpatient protocols. Specifically, information regarding anesthesia and analgesia modalities, perioperative care, operative technique, and postoperative care within outpatient TKA pathways is discussed...
January 2018: Orthopedic Clinics of North America
https://www.readbyqxmd.com/read/29145977/outpatient-total-knee-arthroplasty-are-we-there-yet-part-1
#3
REVIEW
Andrew Krause, Zain Sayeed, Mouhanad El-Othmani, Vinay Pallekonda, William Mihalko, Khaled J Saleh
Recent trends in total joint care have moved toward outpatient surgery. Total knee arthroplasty (TKA) remains a definitive management for end-stage osteoarthritis and has experienced increased utilization over the past several decades. The method by which surgeons conduct outpatient total knee procedures has yet to be fully elucidated as different institutions report different experiences from their pathways. This article will discuss current data and recommendations for implementing successful TKA and unicompartmental knee arthroplasty outpatient protocols...
January 2018: Orthopedic Clinics of North America
https://www.readbyqxmd.com/read/29129614/mid-term-clinical-functional-and-radiographic-outcomes-of-105-gender-specific-patellofemoral-arthroplasties-with-or-without-the-association-of-medial-unicompartmental-knee-arthroplasty
#4
Sergio Romagnoli, Matteo Marullo
BACKGROUND: The purpose of this study is to evaluate clinical and radiographic outcomes after gender-specific patellofemoral arthroplasty (PFA) either isolated or combined with unicompartmental knee arthroplasty (UKA). METHODS: A total of 105 PFAs in 85 patients were reviewed: 64 knees had isolated patellofemoral osteoarthritis and received an isolated PFA, and 41 knees with bicompartmental osteoarthritis were treated with medial UKA and PFA. Preoperative and postoperative clinical and functional assessment included knee range of motion, Knee Society Score, University of California Los Angeles Activity Score, Tegner Activity Level Scale, and visual analogue scale pain...
October 24, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29124288/the-medial-tibial-joint-line-elevation-over-5%C3%A2-mm-restrained-the-improvement-of-knee-extension-angle-in-unicompartmental-knee-arthroplasty
#5
Koji Takayama, Kazunari Ishida, Hirotsugu Muratsu, Yuichi Kuroda, Masanori Tsubosaka, Shingo Hashimoto, Shinya Hayashi, Takehiko Matsushita, Takahiro Niikura, Ryosuke Kuroda, Tomoyuki Matsumoto
PURPOSE: The purpose of this study was to examine the relationship between medial tibial joint line elevation and the improvement of range of motion (ROM) in unicompartmental knee arthroplasty (UKA). The hypothesis was that limited elevation of tibial joint line will improve knee range of motion in UKA. METHODS: Forty-six consecutive medial UKAs were enrolled in this study. Medial tibial joint line elevation was defined as the polyethylene insert and tibial tray thickness minus the tibial osteotomy and sawblade thickness...
November 9, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29121696/quadriceps-and-hamstring-muscle-strength-improves-after-unicompartmental-knee-arthroplasty
#6
Jennifer Kurowicki, Anton Khlopas, Nipun Sodhi, Jared M Newman, Assem A Sultan, Morad Chughtai, Anil Bhave, Martin Roche, Peter M Bonutti, Michael A Mont
INTRODUCTION: The ability to reach functional capacity following knee arthroplasty depends on the strength of the quadriceps and hamstring muscles. Following total knee arthroplasty, weakness of these muscles can persist for up to one year postoperatively; however, this phenomenon is not well-studied in unicompartmental knee arthroplasty (UKA) patients. Therefore, we assessed: 1) quadriceps muscle strength; 2) hamstring muscle strength; and 3) correlation to functional outcomes. MATERIALS AND METHODS: A review of all patients with medial compartment osteoarthritis treated with UKA at a minimum of one-year follow-up was performed...
November 9, 2017: Surgical Technology International
https://www.readbyqxmd.com/read/29114630/unicompartmental-knee-arthroplasty-modes-of-failure-and-conversion-to-total-knee-arthroplasty
#7
REVIEW
Michele Vasso, Katia Corona, Rocco D'Apolito, Giuseppe Mazzitelli, Alfredo Schiavone Panni
Despite the excellent success rates of the modern unicompartmental knee arthroplasty (UKA), results of knee replacement registries still shows a relatively high revision and failure rate for UKA, especially when compared with traditional total knee arthroplasty (TKA). Bearing dislocation continues to be advocated as the predominant mechanism of failure in mobile UKA, whereas polyethylene wear and aseptic loosening remains the main cause of failure of fixed UKA. Degeneration of the unreplaced compartments has been reported in both mobile and fixed designs...
March 2017: Joints
https://www.readbyqxmd.com/read/29113757/eight-hundred-twenty-five-medial-mobile-bearing-unicompartmental-knee-arthroplaties-the-first-10-year-us%C3%A2-multi-center-survival-analysis
#8
Omar K Alnachoukati, John W Barrington, Keith R Berend, Michael C Kolczun, Roger H Emerson, Adolph V Lombardi, David R Mauerhan
BACKGROUND: FDA approval for the Oxford phase III device was approved for use in the United States in 2004. This study seeks to provide the first long-term, large patient sample size, Oxford phase III multi-site survivorship study in the United States, investigating patient reported outcomes of pain and function, while also providing an in-depth analysis of causes for revision, and finally addressing recent advancements that can help aid the unicompartmental knee arthroplasty (UKA) process and further improve partial knee survivorship...
October 16, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29103779/is-outpatient-unicompartmental-knee-arthroplasty-safe-to-perform-at-an-ambulatory-surgery-center-a-comparative-study-of-early-post-operative-complications
#9
John P Cody, Kiel J Pfefferle, Deborah J Ammeen, Kevin B Fricka
BACKGROUND: Unicompartmental knee arthroplasty (UKA) lends itself to the outpatient surgical setting. Prior literature has established a low rate of readmission and post-operative complications when performed in a hospital outpatient setting (HOP). To our knowledge, there have been no studies comparing complications of UKA performed at an ambulatory surgery center (ASC) and those in a HOP. METHODS: We retrospectively reviewed all patients who underwent outpatient UKA by a single surgeon from 2012 to 2016...
October 10, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29103778/reduced-bearing-excursion-after-mobile-bearing-unicompartmental-knee-arthroplasty-is-associated-with-poor-functional-outcomes
#10
Naman Wahal, Sahil Gaba, Rajesh Malhotra, Vijay Kumar, Elise C Pegg, Hemant Pandit
BACKGROUND: A small proportion of patients with mobile unicompartmental knee arthroplasty (UKA) report poor functional outcomes in spite of optimal component alignment on postoperative radiographs. The purpose of this study is to assess whether there is a correlation between functional outcome and knee kinematics. METHODS: From a cohort of consecutive cases of 150 Oxford medial UKA, patients with fair/poor functional outcome at 1-year postsurgery (Oxford Knee Score [OKS] < 34, n = 15) were identified and matched for age, gender, preoperative clinical scores, and follow-up period with a cohort of patients with good/excellent outcome (OKS ≥ 34, n = 15)...
October 6, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29078996/ambulatory-unicompartmental-knee-arthroplasty-short-outcome-of-50-first-cases
#11
N Ruiz, X Buisson, G Filippi, M Roulet, H Robert
INTRODUCTION: The reduction in length of stay (LOS) in orthopaedic surgery has been steady for several years. For the past 3 or 4 years in France, the trend towards outpatient surgery has been growing up, as it is a goal for hospital administration. MATERIALS AND METHODS: This is a prospective, continuous,mono-centric, single operator study on 56 UKAs. Included were all UKAs carried out between January 2014 and December 2015, meeting the following criteria: voluntary patients, supportive family environment, absence of comorbidity (oral anticoagulants, diabetes, obesity), ASA score ≤ 3...
October 24, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29074321/predicting-the-feasibility-of-correcting-mechanical-axis-in-large-varus-deformities-with-unicompartmental-knee-arthroplasty
#12
Laura J Kleeblad, Jelle P van der List, Andrew D Pearle, Austin T Fragomen, S Robert Rozbruch
BACKGROUND: Due to disappointing historical outcomes of unicompartmental knee arthroplasty (UKA), Kozinn and Scott proposed strict selection criteria, including preoperative varus alignment of ≤15°, to improve the outcomes of UKA. No studies to date, however, have assessed the feasibility of correcting large preoperative varus deformities with UKA surgery. The study goals were therefore to (1) assess to what extent patients with large varus deformities could be corrected and (2) determine radiographic parameters to predict sufficient correction...
October 5, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29067955/effects-of-lower-limb-alignment-and-tibial-component-inclination-on-the-biomechanics-of-lateral-compartment-in-unicompartmental-knee-arthroplasty
#13
Peng-Fei Wen, Wan-Shou Guo, Fu-Qiang Gao, Qi-Dong Zhang, Ju-An Yue, Li-Ming Cheng, Guang-Duo Zhu
BACKGROUND: Lateral compartmental osteoarthritis (LCOA), a major complication after medial mobile-bearing unicompartmental knee arthroplasty (UKA), is highly associated with the increased stress of the lateral compartment. This study aimed to analyze the effects on the stress and load distribution of the lateral compartment induced by lower limb alignment and coronal inclination of the tibial component in UKA through a finite element analysis. METHODS: Eight three-dimensional models were constructed based on a validated model for analyzing the biomechanical effects of implantation parameters on the lateral compartment after medial Oxford UKA: postoperative lower limb alignment of 3° valgus, neutral and 3° varus, and the inclination of tibial components placed in 4°, 2° valgus, square, and 2° and 4° varus...
November 5, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/29033153/clinical-outcomes-and-survivorship-of-lateral-unicompartmental-knee-arthroplasty-does-surgical-approach-matter
#14
Tori A Edmiston, Gregory C Manista, P Maxwell Courtney, Scott M Sporer, Craig J Della Valle, Brett R Levine
BACKGROUND: Lateral unicompartmental knee arthroplasty (UKA) has been shown to be an effective procedure to treat isolated lateral compartment osteoarthritis with excellent long-term survivorship. Whether a medial parapatellar approach or a lateral parapatellar approach is superior in lateral UKA is unknown. The purpose of this study was to determine if there is a difference in intermediate-term clinical outcomes in patients undergoing lateral UKA through a lateral vs medial parapatellar approach...
September 21, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28993855/postoperative-fixed-flexion-deformity-greater-than-10%C3%A2-lead-to-poorer-functional-outcome-10%C3%A2-years-after-unicompartmental-knee-arthroplasty
#15
Jared Ze Yang Yeh, Jerry Yongqiang Chen, Joel Wei-An Lim, Hee Nee Pang, Darren Keng Jin Tay, Shi-Lu Chia, Ngai Nung Lo, Seng Jin Yeo
PURPOSE: The primary aim of this study was to evaluate the influence of postoperative fixed flexion deformity (FFD) on the clinical outcomes 10 years after unicompartmental knee arthroplasty (UKA). The secondary aim was to identify predictors for the occurrence of postoperative FFD. METHODS: Patients who underwent UKA between 2003 and 2007 were prospectively followed up for 10 years. A total of 172 patients were categorized into 3 groups based on the amount of postoperative FFD: (1) 0° or less (Min-FFD), (2) 1°-9° (Mid-FFD), and (3) 10° or more (Max-FFD)...
October 9, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28993076/unicompartmental-knee-arthroplasty-achieves-greater-flexion-with-no-difference-in-functional-outcome-quality-of-life-and-satisfaction-vs-total-knee-arthroplasty-in-patients-younger-than-55-years-a-propensity-score-matched-cohort-analysis
#16
Graham Seow-Hng Goh, Hamid Rahmatullah Bin Abd Razak, Darren Keng-Jin Tay, Shi-Lu Chia, Ngai-Nung Lo, Seng-Jin Yeo
BACKGROUND: Improvements in surgical techniques, implant design, and adherence to indications have resulted in favorable outcomes after unicompartmental knee arthroplasty (UKA), particularly in an older population. However, no studies have compared the performance of contemporary UKA and total knee arthroplasty (TKA) in a young population. METHODS: Prospectively collected registry data of 160 UKAs performed in 160 patients younger than 55 years were reviewed. Propensity scores generated using logistic regression were used to adjust for confounding variables of age, gender, body mass index, preoperative range of motion, Knee Society Score, Oxford Knee Score, and Short-Form 36, allowing matching of the TKA cohort to the UKA cohort in a 1:1 ratio using the nearest-neighbor method...
September 19, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28983215/mid-term-outcomes-of-metal-backed-unicompartmental-knee-arthroplasty-show-superiority-to-all-polyethylene-unicompartmental-and-total-knee-arthroplasty
#17
Jelle P van der List, Laura J Kleeblad, Hendrik A Zuiderbaan, Andrew D Pearle
BACKGROUND: Two commonly used tibial designs for unicompartmental knee arthroplasty (UKA) are all-polyethylene "inlay" and metal-backed "onlay" components. Biomechanical studies showed that the metal baseplate in onlay designs better distributes forces over the tibia but studies failed to show differences in functional outcomes between both designs at mid-term follow-up. Furthermore, no studies have compared both designs with total knee arthroplasty (TKA). QUESTIONS/PURPOSES: The goal of this study was to compare outcomes of inlay UKA and onlay UKA at mid-term follow-up and compare these with TKA outcomes...
October 2017: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
https://www.readbyqxmd.com/read/28977815/quantitative-evaluation-of-joint-space-width-in-the-lateral-compartment-after-medial-unicompartmental-knee-arthroplasty-comparison-of-three-radiographic-views
#18
Ju'an Yue, Wanshou Guo, Fuyin Wan, Pengfei Wen, Zhaohui Liu, Liming Cheng, Qidong Zhang, Yan Chen
No abstract text is available yet for this article.
October 4, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28964920/return-to-sports-and-quality-of-life-after-high-tibial-osteotomy-in-patients-under-60-years-of-age
#19
C Bastard, G Mirouse, D Potage, H Silbert, F Roubineau, P Hernigou, C-H Flouzat-Lachaniette
INTRODUCTION: Since knee osteoarthritis is unicompartmental in most cases, a knee osteotomy is the most logical solution to limit degeneration of the arthritic compartment, thereby delaying knee arthroplasty. Younger patients have high functional demands. The purpose of this study was to evaluate the return to sports and quality of life after high tibial osteotomy (HTO) in athletic patients less than 60 years of age. The hypothesis was that patients can return to sports within 1 year of HTO...
September 28, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28963154/revision-total-knee-arthroplasty-for-failed-high-tibial-osteotomy-and-unicompartmental-knee-arthroplasty-have-similar-patient-reported-outcome-measures-in-a-two-year-follow-up-study
#20
J B T Lim, H C Chong, H N Pang, K J D Tay, S L Chia, N N Lo, S J Yeo
AIMS: Little is known about the relative outcomes of revision of unicompartmental knee arthroplasty (UKA) and high tibial osteotomy (HTO) to total knee arthroplasty (TKA). The aim of this study is to compare the outcomes of revision surgery for the two procedures in terms of complications, re-revision and patient-reported outcome measures (PROMs) at a minimum of two years follow-up. PATIENTS AND METHODS: This study was a retrospective review of data from an institutional arthroplasty registry for cases performed between 2001 and 2014...
October 2017: Bone & Joint Journal
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