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Unicompartmental knee arthroplasty

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https://www.readbyqxmd.com/read/28401796/unicompartmental-knee-arthroplasties-are-performed-on-the-patients-with-radiologically-too-mild-osteoarthritis
#1
J Knifsund, J Hatakka, H Keemu, K Mäkelä, M Koivisto, T Niinimäki
BACKGROUND: Patient selection for either total knee arthroplasty or unicompartmental knee arthroplasty remains controversial. The latter has several reported advantages over total knee arthroplasty, but it also appears to have significant drawbacks in terms of revision rates. AIMS: This study aimed to determine the influence of the preoperative degree of osteoarthritis on the risk of reoperation following unicompartmental knee arthroplasty. METHODS: Surgery was carried out on 294 knees in 241 patients between 2001 and 2012 at a single institute, using cemented Oxford phase III unicompartmental knee arthroplasty...
April 1, 2017: Scandinavian Journal of Surgery: SJS
https://www.readbyqxmd.com/read/28385936/unsatisfactory-outcomes-following-unicompartmental-knee-arthroplasty-in-patients-with-partial-thickness-cartilage-loss-a-medium-term-follow-up
#2
T W Hamilton, H G Pandit, A Inabathula, S J Ostlere, C Jenkins, S J Mellon, C A F Dodd, D W Murray
AIMS: While medial unicompartmental knee arthroplasty (UKA) is indicated for patients with full-thickness cartilage loss, it is occasionally used to treat those with partial-thickness loss. The aim of this study was to investigate the five-year outcomes in a consecutive series of UKAs used in patients with partial thickness cartilage loss in the medial compartment of the knee. PATIENTS AND METHODS: Between 2002 and 2014, 94 consecutive UKAs were undertaken in 90 patients with partial thickness cartilage loss and followed up independently for a mean of six years (1 to 13)...
April 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28366049/does-obesity-influence-early-outcome-of-fixed-bearing-unicompartmental-knee-arthroplasty
#3
Yew Lok Woo, Yong Qiang Jerry Chen, Mun Chun Lai, Kheng Jin Darren Tay, Shi-Lu Chia, Ngai Nung Lo, Seng Jin Yeo
Obesity is a known major contributing risk factor for knee osteoarthritis (OA). It is also believed that obese unicompartmental knee arthroplasty (UKA) patients tend to have poorer outcome and possible early failure. The purpose of this study is to investigate the early outcome of obese UKA patients in a single institution. Patients who underwent fixed bearing medial UKA in between year 2005 and 2010 were included in this study. They were divided into four groups based on Body Mass Index (BMI): 25 kg/m(2) (Control); 25-29...
January 1, 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28364321/satisfactory-outcomes-following-combined-unicompartmental-knee-replacement-and-anterior-cruciate-ligament-reconstruction
#4
REVIEW
Andrea Volpin, S G Kini, D E Meuffels
PURPOSE: There exist limited options for treatment of patients with combined medial compartment arthritis and anterior cruciate ligament (ACL) deficiency. Ideal treatment is one that offers lasting relief of symptoms not compromising any future surgery. Unicompartmental knee replacement has shown consistently good results in the relatively young and active population, but there is a high reported incidence of failure up to 20%, if performed in ACL-deficient knees. One of the recognized treatment modality is combined ACL reconstruction and unicompartmental arthroplasty...
March 31, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28361283/corr-insights-%C3%A2-have-the-causes-of-revision-for-total-and-unicompartmental-knee-arthroplasties-changed-during-the-past-two-decades
#5
Andrew J Schoenfeld
No abstract text is available yet for this article.
March 30, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28351371/unicompartmental-knee-arthroplasty-is-it-superior-to-high-tibial-osteotomy-in-treating-unicompartmental-osteoarthritis-a-meta-analysis-and-systemic-review
#6
Marcel Budhi Santoso, Lidong Wu
BACKGROUND: Debate remains whether high tibial osteotomy (HTO) or unicompartmental knee arthroplasty (UKA) is more beneficial for the treatment of unicompartmental knee osteoarthritis. The purpose of this study was to compare the functional results, knee scores, activity levels, and complications between the two procedures. METHODS: We performed a systematic review of published literature from August 1982 through January 2017. Fifteen papers reporting three prospective randomized trials were subjected to a meta-analysis...
March 28, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28330757/does-new-instrumentation-improve-radiologic-alignment-of-the-oxford%C3%A2-medial-unicompartmental-knee-arthroplasty
#7
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/28299718/have-the-causes-of-revision-for-total-and-unicompartmental-knee-arthroplasties-changed-during-the-past-two-decades
#8
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/28274618/what-factors-drive-inpatient-satisfaction-after-knee-arthroplasty
#9
Ashwin Peres-da-Silva, Lindsay T Kleeman, Samuel S Wellman, Cynthia L Green, David E Attarian, Michael P Bolognesi, Thorsten M Seyler
BACKGROUND: The Hospital Consumer Assessment of Healthcare Providers and Systems (HCAHPS) survey, developed by the Centers for Medicare & Medicaid Services, is directly tied to hospital reimbursement. The purpose of this study is to analyze survey responses from patients who underwent primary knee arthroplasty in order to identify factors that drive patient dissatisfaction in the inpatient setting. METHODS: HCAHPS responses received from patients undergoing elective total and unicompartmental knee arthroplasty at our institution between January 1, 2013 and January 1, 2016 were obtained and expressed as a percentage of overall satisfaction...
February 1, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28254376/preoperative-patellofemoral-chondromalacia-is-not-a-contraindication-for-fixed-bearing-medial-unicompartmental-knee-arthroplasty
#10
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/28251284/the-pertinent-question-in-treatment-of-unicompartmental-osteoarthritis-of-the-knee-high-tibial-osteotomy-or-unicondylar-knee-arthroplasty-or-total-knee-arthroplasty
#11
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/28246566/treating-early-knee-osteoarthritis-with-the-atlas%C3%A2-unicompartmental-knee-system-in-a-26-year-old-ex-professional-basketball-player-a-case-study
#12
Konrad Slynarski, Lukasz Lipinski
Knee osteoarthritis (OA) is a leading cause of disability among adults. Within the affected population, there exists a group of patients who have exhausted conservative treatment options and yet are not ideal candidates for current surgical treatments due to young age, early disease severity, or neutral mechanical knee alignment. For these patients, a new potential treatment option may be considered. We present an interesting case report of a young, ex-professional athlete treated with a minimally invasive load-altering implant (Atlas System) whose young age (26 years), disease status (tibiofemoral kissing lesions), and neutral mechanical limb alignment eliminated all traditional surgical treatment options such as high tibial osteotomy or arthroplasty...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/28229182/outpatient-unicompartmental-knee-arthroplasty-who-is-afraid-of-outpatient-surgery
#13
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
#14
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
#15
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/28185777/survivorship-and-patient-satisfaction-of-robotic-assisted-medial-unicompartmental-knee-arthroplasty-at-a-minimum-two-year-follow-up
#16
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
#17
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/28164064/arthroscopic-scar-resection-for-the-treatment-of-anteromedial-knee-pain-after-oxford-unicompartmental-knee-arthroplasty-a-case-report
#18
Kohei Kawaguchi, Kazuhiko Michishita, Takeshi Manabe, Yoshiyuki Akasaka, Naoto Kaminaga
INTRODUCTION: It has been reported that the unicompartmental knee arthroplasty has good long-term outcomes for Western and Japanese patients. Alternatively, several reports have described reoperations after unicompartmental knee arthroplasty because of post-operative knee pain and sometimes it is difficult to diagnose the cause of pain. CASE REPORT: We treated a patient with anteromedial knee pain caused by intra-articular scar tissue that contained residual cement fragments on the anterior surface of a femoral implant following Oxford unicompartmental knee arthroplasty...
September 2016: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28131544/evidence-based-indications-for-mobile-bearing-unicompartmental-knee-arthroplasty-in-a-consecutive-cohort-of-thousand-knees
#19
Thomas W Hamilton, Hemant G Pandit, Cathy Jenkins, Stephen J Mellon, Christopher A F Dodd, David W Murray
BACKGROUND: The indications for unicompartmental knee arthroplasty remain controversial. Previously recommended contraindications include the following: age under 60 years, weight 180 lb (82 kg) or over, patients undertaking heavy labor, chondrocalcinosis, and exposed bone in the patellofemoral joint. This study explores whether these contraindications are valid in mobile-bearing unicompartmental knee arthroplasty. METHODS: Using a prospective series of 1000 consecutive medial unicompartmental knee arthroplasties in which the reported contraindications were not applied, the functional outcome and survival in patients with or without contraindications were compared...
December 27, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28110847/improved-survival-of-computer-assisted-unicompartmental-knee-arthroplasty-252-cases-with-a-minimum-follow-up-of-5-years
#20
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
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