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Unicompartmental knee arthroplasty

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https://www.readbyqxmd.com/read/28488164/up-to-twelve-year-follow-up-of-the-oxford-phase-three-unicompartmental-knee-replacement-in-china-seven-hundred-and-eight-knees-from-an-independent-centre
#1
Huaming Xue, Yihui Tu, Tong Ma, Tao Wen, Tao Yang, Minwei Cai
PURPOSE: There have been few large sample studies reporting the midterm outcome of Oxford phase 3 unicompartmental knee arthroplasty (UKA) in Asian patients. METHODS: The study included 708 consecutive medial Oxford UKAs between February 2005 and May 2014 in Chinese patients. All cases were performed for the recommended indications with a minimally-invasive surgical technique. The functional and radiological outcomes were subsequently examined. In particular, we divided patients into the spontaneous osteonecrosis of the knee (SONK) group and the osteoarthritis (OA) group...
May 10, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28455472/anterior-knee-pain-and-evidence-of-osteoarthritis-of-the-patellofemoral-joint-should-not-be-considered-contraindications-to-mobile-bearing-unicompartmental-knee-arthroplasty-a-15-year-follow-up
#2
T W Hamilton, H G Pandit, D G Maurer, S J Ostlere, C Jenkins, S J Mellon, C A F Dodd, D W Murray
AIMS: It is not clear whether anterior knee pain and osteoarthritis (OA) of the patellofemoral joint (PFJ) are contraindications to medial unicompartmental knee arthroplasty (UKA). Our aim was to investigate the long-term outcome of a consecutive series of patients, some of whom had anterior knee pain and PFJ OA managed with UKA. PATIENTS AND METHODS: We assessed the ten-year functional outcomes and 15-year implant survival of 805 knees (677 patients) following medial mobile-bearing UKA...
May 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28455471/five-year-clinical-and-radiological-outcomes-in-257-consecutive-cementless-oxford-medial-unicompartmental-knee-arthroplasties
#3
J Blaney, H Harty, E Doran, S O'Brien, J Hill, I Dobie, D Beverland
AIMS: Our aim was to examine the clinical and radiographic outcomes in 257 consecutive Oxford unicompartmental knee arthroplasties (OUKAs) (238 patients), five years post-operatively. PATIENTS AND METHODS: A retrospective evaluation was undertaken of patients treated between April 2008 and October 2010 in a regional centre by two non-designing surgeons with no previous experience of UKAs. The Oxford Knee Scores (OKSs) were recorded and fluoroscopically aligned radiographs were assessed post-operatively at one and five years...
May 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28454195/-unicompartmental-vs-total-knee-arthroplasty-for-medial-osteoarthritis
#4
Tilman Pfitzner, Carsten Perka, Philipp von Roth
Background In end-stage medial osteoarthritis, the surgeon can decide whether to use unicompartmental or total knee arthroplasty for operative treatment of the patient. Despite the available literature there is a lack of evidence to suggest if one procedure can be rated as being superior to the other. With increasing demand for knee arthroplasty, treatment with the highest expectation of success will be of particular interest. The purpose of this manuscript was to analyse and compare the available literature on unicompartmental vs...
April 28, 2017: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/28451601/cost-comparison-of-outpatient-versus-inpatient-unicompartmental-knee-arthroplasty
#5
Dustin L Richter, David R Diduch
BACKGROUND: Outpatient unicompartmental knee arthroplasty (UKA) has been shown to be safe and feasible when compared with inpatient surgery; however, no studies have evaluated the cost-effectiveness and cost-benefit of performing outpatient versus inpatient UKA. HYPOTHESIS: Significant cost savings can be achieved by transitioning UKAs from an inpatient to an outpatient procedure in an outpatient surgical facility, with no appreciable difference in complication or readmission rates...
March 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28439705/cementless-oxford-medial-unicompartimental-knee-replacement-an-independent-series-with-a-5-year-follow-up
#6
Benjamin Panzram, Ines Bertlich, Tobias Reiner, Tilman Walker, Sébastien Hagmann, Tobias Gotterbarm
PURPOSE: Cemented unicompartmental knee replacement (UKR) has proven excellent long-term survival rates and functional scores in Price et al. (Clin Orthop Relat Res 435:171-180, 2005), Price and Svard (Clin Orthop Relat Res 469(1):174-179, 2011) and Murray et al. (Bone Joint Surg Br 80(6):983-989, 1998). The main causes for revision, aseptic loosening and pain of unknown origin might be addressed by cementless UKR in Liddle et al. (Bone Joint J 95-B(2):181-187, 2013), Pandit et al. (J Bone Joint Surg Am 95(15):1365-1372, 2013), National Joint Registry for England, Wales and Northern Ireland: 10th Annual Report 2013 ( http://www...
April 24, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28439701/the-influence-of-different-sets-of-surgical-instrumentation-in-oxford-uka-on-bearing-size-and-component-position
#7
Tilman Walker, Pascal Heinemann, Thomas Bruckner, Marcus R Streit, Stefan Kinkel, Tobias Gotterbarm
INTRODUCTION: The Oxford unicompartmental knee arthroplasty (OUKA) has been proven to be an effective treatment for anteromedial osteoarthritis of the knee joint. New instrumentation has been introduced to improve the reproducibility of implant positioning and to minimize bone loss during tibial resection (Oxford Microplasty; Zimmer Biomet, Warsaw, Indiana, USA). METHODS: To assess the effect of the new instrumentation, we retrospectively evaluated the postoperative radiographs and surgical records of 300 OUKAs in three consecutive cohorts of patients...
April 24, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28401796/unicompartmental-knee-arthroplasties-are-performed-on-the-patients-with-radiologically-too-mild-osteoarthritis
#8
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
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#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/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
#19
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
#20
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
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