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Unicompartmental knee arthroplasty

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https://www.readbyqxmd.com/read/29349978/-correlation-of-medial-compartmental-joint-line-elevation-with-femorotibial-angle-correction-and-clinical-function-after-unicompartmental-arthroplasty
#1
Zhan-Feng Zhang, Dan Wang, Ji-Kang Min
OBJECTIVE: To study the correlation of postoperative femorotibial angle with medial compartmental joint line elevation after unicompartmental arthroplasty(UKA), as well as the correlation of joint line elevation with the clinical function by measuring radiological joint line. METHODS: A retrospective study of 56 patients from July 2012 to August 2015 was performed. The mean body mass index (BMI) was 23.5 (ranged, 18.3 to 30.1). The standing anteroposterior radiographs of these patients were assessed both pre-and post-operatively, and the knee function was evaluated according to HSS grading...
April 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29343231/cementless-unicompartmental-knee-replacement-allows-early-return-to-normal-activity
#2
Benjamin Panzram, Ines Bertlich, Tobias Reiner, Tilman Walker, Sébastien Hagmann, Tobias Gotterbarm
BACKGROUND: Physical activity and regular participation in recreational sports gain importance in patients' lifestyle after knee arthroplasty. Cementless unicompartimental Knee replacement with the Oxford System has been introduced into clinical routine. Currently there is no data reporting on the physical activity, return to sports rate and quality of live after medial cementless Oxford Unicompartimental Knee Replacement (OUKR). METHODS: This retrospective cohort study reports on the functional outcome of the first 27 consecutive patients (30 knees) that were consecutively treated with a cementless medial OUKR between 2007 and 2009 in our hospital...
January 17, 2018: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29336368/glycosaminoglycan-content-of-the-lateral-compartment-cartilage-in-knees-conforming-to-the-indications-for-oxford-medial-unicompartmental-knee-arthroplasty
#3
Fu-Yin Wan, Ju-An Yue, Wan-Shou Guo, Lu-Yao Ma, Ran Yan, Qi-Dong Zhang, Li-Ming Cheng
BACKGROUND: The quality of the lateral compartment cartilage is important to preoperative evaluation and prognostic prediction of unicompartmental knee arthroplasty (UKA). Delayed gadolinium-enhanced magnetic resonance imaging of cartilage (dGEMRIC) enables noninvasive assessment of glycosaminoglycan (GAG) content in cartilage. This study aimed to determine the GAG content of the lateral compartment cartilage in knees scheduled to undergo Oxford medial UKA. METHODS: From December 2016 to May 2017, twenty patients (20 osteoarthritic knees) conforming to the indications for Oxford medial UKA were included as the osteoarthritis (OA) group, and 20 healthy volunteers (20 knees) paired by sex, knee side, age (±3 years), and body mass index (BMI) (±3 kg/m2) were included as the control group...
January 20, 2018: Chinese Medical Journal
https://www.readbyqxmd.com/read/29325840/early-comparative-outcomes-of-unicompartmental-and-total-knee-arthroplasty-in-severely-obese-patients
#4
Zachary C Lum, David A Crawford, Adolph V Lombardi, Jason M Hurst, Michael J Morris, Joanne B Adams, Keith R Berend
BACKGROUND: Medial unicompartmental knee arthroplasty (UKA) may have advantages over total knee arthroplasty (TKA) in the setting of obesity. There has been no direct comparison between the two cohorts. This study compares outcomes and complications of severely obese patients undergoing medial UKA versus TKA. METHODS: Six hundred and fifty medial UKA and 1300 TKA were performed in patients with BMI >35kg/m2 (mean 41kg/m2) between 2007 and 2012. Pre- and postoperative ROM, Knee Society scores, perioperative factors, complications and reoperations were compared...
January 8, 2018: Knee
https://www.readbyqxmd.com/read/29305427/patient-specific-medial-unicompartmental-knee-arthroplasty-has-a-greater-protective-effect-on-articular-cartilage-in-the-lateral-compartment-a-finite-element-analysis
#5
K-T Kang, J Son, D-S Suh, S K Kwon, O-R Kwon, Y-G Koh
OBJECTIVES: Patient-specific (PS) implantation surgical technology has been introduced in recent years and a gradual increase in the associated number of surgical cases has been observed. PS technology uses a patient's own geometry in designing a medical device to provide minimal bone resection with improvement in the prosthetic bone coverage. However, whether PS unicompartmental knee arthroplasty (UKA) provides a better biomechanical effect than standard off-the-shelf prostheses for UKA has not yet been determined, and still remains controversial in both biomechanical and clinical fields...
January 2018: Bone & Joint Research
https://www.readbyqxmd.com/read/29299472/does-a-simple-syringe-applicator-enhance-bone-cement-set-up-time-in-knee-arthroplasty
#6
Nipun Sodhi, Sarah E Dalton, Anton Khlopas, Assem A Sultan, Gannon L Curtis, Matthew A Harb, Qais Naziri, Jared M Newman, John W Barrington, Michael A Mont
Background: The time required for polymethylmethacrylate (PMMA) cement curing or hardening can be modified by a number of variables including the mixing technique, and the temperature and pressure at which the process is taking place. Therefore, the purpose of this study was to evaluate two different methods of PMMA application in terms of set up time. Specifically, we (I) compared the PMMA set up time of cement that remained in the mixing bowl to cement that was placed in a syringe and (II) extrapolated the associated annual cost difference on the national and individual surgeon levels...
December 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/29298463/long-term-clinical-results-of-unicompartmental-knee-arthroplasty-in-patients-younger-than-60-years-of-age-minimum-10-year-follow-up
#7
Kyung Tae Kim, Song Lee, Jung Soo Lee, Min Su Kang, Ki Hyuk Koo
Purpose: To evaluate the long-term clinical results and survivorship of unicompartmental knee arthroplasty (UKA) in patients younger than 60 years of age. Materials and Methods: One hundred and six cases of medial UKA with a minimum follow-up of 10 years were selected for this study. There were 80 patients and the preoperative diagnosis was osteoarthritis in all cases. The mean age of the patients was 54.2 years and the mean duration of follow-up was 12.1 years...
January 4, 2018: Knee Surgery & related Research
https://www.readbyqxmd.com/read/29298462/high-tibial-osteotomy-versus-unicompartmental-knee-arthroplasty-for-medial-compartment-arthrosis-with-kissing-lesions-in-relatively-young-patients
#8
Seung Min Ryu, Jae Woo Park, Ho Dong Na, Oog Jin Shon
Purpose: The purpose of this study is to compare the clinical and radiographic outcomes of high tibial osteotomy (HTO) and unicompartmental arthroplasty (UKA) in advanced medial compartment arthritis accompanied by kissing lesions in relatively young patients. Materials and Methods: Forty-five patients were divided into the HTO (n=23) and UKA (n=22) groups. Clinically, we evaluated the Lysholm knee scoring scale, visual analogue scale, Hospital for Special Surgery, and Western Ontario and McMaster Universities Osteoarthritis index scores preoperatively, 6 and 12 months postoperatively, and at the final follow-up...
January 4, 2018: Knee Surgery & related Research
https://www.readbyqxmd.com/read/29290333/technology-assisted-hip-and-knee-arthroplasties-an-analysis-of-utilization-trends
#9
Matthew Boylan, Kelly Suchman, Jonathan Vigdorchik, James Slover, Joseph Bosco
BACKGROUND: Robotic and computer navigation technology is available to surgeons for use in hip and knee arthroplasties to increase the precision of component placement. However, they do add significant costs to these procedures, and the long-term clinical outcomes and value of technology assistance for joint replacement remain unclear. METHODS: We identified 321,522 patients in Medicare Severity Diagnosis Related Groups 469 and 470 who underwent primary total hip arthroplasty (N = 133,472) or primary total or unicompartmental knee arthroplasty (N = 188,050) between 2008 and 2015 in the New York Statewide Planning and Research Cooperative System (SPARCS)...
November 29, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29282486/patient-specific-instrumentation-in-oxford-unicompartmental-knee-arthroplasty-is-reliable-and-accurate-except-for-the-tibial-rotation
#10
B Kerens, A M Leenders, M G M Schotanus, B Boonen, W E Tuinebreijer, P J Emans, B Jong, N P Kort
PURPOSE: Patient-specific instrumentation (PSI) is a technique to plan and position the prosthesis components in unicompartmental knee arthroplasty (UKA) surgery. This study assesses whether the definitive component position in the frontal, sagittal and axial plane is according to the preoperative plan, based on the hypothesis that PSI is accurate. METHODS: Twenty-six patients who had PSI Oxford UKA surgery were included prospectively. The component position in vivo was determined with a postoperative CT-scan and compared with the planned component position using MRI-based digital 3D imaging...
December 27, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29280006/minimally-invasive-unicompartmental-knee-arthroplasty
#11
REVIEW
Jean-Yves Jenny
The exact indication for a unicompartmental knee arthroplasty (UKA) remains debated. Minimally invasive techniques have been developed to decrease the surgical trauma related to the prosthesis implantation, and this technique is well fitted to UKA. However, there are concerns about loss of accuracy with minimally invasive techniques. Furthermore, rapid recovery techniques have been developed in order to reduce the length of hospital stay. Again, UKA is well fitted to these new developments of postoperative care...
December 26, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/29249013/results-with-nine-years-mean-follow-up-on-one-hundred-and-three-kaps%C3%A2-uni-knee-arthroplasties-eighty-six-medial-and-seventeen-lateral
#12
Dominique Saragaglia, Adrien Bevand, Ramsay Refaie, Brice Rubens-Duval, Régis Pailhé
PURPOSE: The purpose of this study was to present the results of the KAPS® uni knee arthroplasty system, both mobile and fixed bearing with reference to function, alignment and complications in 103 implants with a mean follow-up of nine years. METHODS: This was a retrospective study of 103 unicompartimental knee arthroplasties in 89 patients operated on between March 2005 and March 2010. The population was composed of 50 males and 39 females, with a mean age of 70...
December 17, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/29244223/fixed-bearing-medial-unicompartmental-knee-arthroplasty-restores-neither-the-medial-pivoting-behavior-nor-the-ligament-forces-of-the-intact-knee-in-passive-flexion
#13
Mohammad Kia, Lucian C Warth, Joseph D Lipman, Timothy M Wright, Geoffrey H Westrich, Michael B Cross, David J Mayman, Andrew D Pearle, Carl W Imhauser
Medial unicompartmental knee arthroplasty (UKA) is an accepted treatment for isolated medial osteoarthritis. However, using an improper thickness for the tibial component may contribute to early failure of the prosthesis or disease progression in the unreplaced lateral compartment. Little is known of the effect of insert thickness on both knee kinematics and ligament forces. Therefore, a computational model of the tibiofemoral joint was used to determine how non-conforming, fixed bearing medial UKA affects tibiofemoral kinematics and tension in the medial collateral ligament (MCL) and the anterior cruciate ligament (ACL) during passive knee flexion...
December 15, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29206786/same-day-discharge-compared-with-inpatient-hospitalization-following-hip-and-knee-arthroplasty
#14
COMPARATIVE STUDY
Bryce A Basques, Matthew W Tetreault, Craig J Della Valle
BACKGROUND: Discharge from the hospital on the day of (same-day) hip and knee arthroplasties has become more common; however, to our knowledge, few studies have compared morbidity between same-day and inpatient surgical procedures. The aims of this study were to compare matched cohorts of patients who underwent same-day and inpatient hip or knee arthroplasty in terms of postoperative complications and 30-day readmission rates. METHODS: Patients who underwent primary elective total hip arthroplasty, total knee arthroplasty, or unicompartmental knee arthroplasty from 2005 to 2014 were identified from the National Surgical Quality Improvement Program registry...
December 6, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29203354/unicompartmental-knee-arthroplasty-vs-high-tibial-osteotomy-for-knee-osteoarthritis-a-systematic-review-and-meta-analysis
#15
ZhenWu Cao, XiuJun Mai, Jun Wang, EnHui Feng, YongMing Huang
BACKGROUND: Prior studies have compared unicompartmental knee arthroplasty (UKA) with high tibial osteotomy (HTO) suggesting that both procedures had good clinical outcomes. However, which treatment is more beneficial for unicompartmental knee osteoarthritis is still a controversy. The purpose of our study is to obtain postoperative outcomes of revision rate, complications, function results, range of motion (ROM), and pain between the 2 procedures. METHODS: Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines were followed and study protocol was published online at PROSPERO under registration number CRD42016049316...
December 1, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29201296/predictors-of-midterm-outcomes-after-medial-unicompartmental-knee-arthroplasty-in-asians
#16
Hamid Rahmatullah Bin Abd Razak, Sanchalika Acharyya, Shi-Ming Tan, Hee-Nee Pang, Keng-Jin Darren Tay, Shi-Lu Chia, Ngai-Nung Lo, Seng-Jin Yeo
Background: This study was designed to evaluate predictors of good outcomes following medial unicompartmental knee arthroplasty (UKA) in Asian patients. Methods: Registry data of patients who underwent primary unilateral medial UKA from 2006 to 2011 were collected. Outcomes studied were the Oxford Knee Score (OKS) and the Physical Component Score (PCS) of the Short Form 36 (SF-36) questionnaire. These outcome scores were collected prospectively, pre- and postoperatively up to 5 years...
December 2017: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/29199061/should-medicare-remove-total-knee-arthroplasty-from-its-inpatient-only-list-a-total-knee-arthroplasty-is-not-a-partial-knee-arthroplasty
#17
P Maxwell Courtney, Mark I Froimson, R Michael Meneghini, Gwo-Chin Lee, Craig J Della Valle
BACKGROUND: The Centers for Medicare and Medicaid Services have solicited comments to consider removing total knee arthroplasty (TKA) from the Inpatient Only list, as it has done for unicompartmental knee arthroplasty (UKA). The purpose of this study is to determine whether Medicare-aged patients undergoing TKA had comparable outcomes to those undergoing UKA. METHODS: We queried the American College of Surgeons-National Surgical Quality Improvement Program database for all patients aged 65 years or older who underwent elective TKA or UKA from 2014 and 2015...
November 21, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29185781/osteochondral-allograft-transplantation-of-the-knee-in-patients-aged-40-years-and-older
#18
Dean Wang, Vivek Kalia, Claire D Eliasberg, Tim Wang, Francesca R Coxe, Mollyann D Pais, Scott A Rodeo, Riley J Williams
BACKGROUND: Treatment of large chondral defects of the knee among patients aged ≥40 years remains a difficult clinical challenge owing to preexisting joint degeneration and the lack of treatment options short of arthroplasty. PURPOSE: To characterize the survivorship, predictors of failure, and clinical outcomes of osteochondral allograft transplantation (OCA) of the knee among patients aged ≥40 years. STUDY DESIGN: Case series; Level of evidence, 4...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29185005/larger-range-of-motion-and-increased-return-to-activity-but-higher-revision-rates-following-unicompartmental-versus-total-knee-arthroplasty-in-patients-under-65-a-systematic-review
#19
REVIEW
Laura J Kleeblad, Jelle P van der List, Hendrik A Zuiderbaan, Andrew D Pearle
PURPOSE: Due to the lack of comparative studies, a systematic review was conducted to determine revision rates of unicompartmental and total knee arthroplasty (UKA and TKA), and compare functional outcomes, range of motion and activity scores in patients less than 65 years of age. METHODS: A literature search was performed using PubMed, Embase, and Cochrane systems since 2000. 27 UKA and 33 TKA studies were identified and included. Annual revision rate (ARR), functional outcomes, and return to activity were assessed for both types of arthroplasty using independent t tests...
November 28, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29175672/effect-of-minimally-invasive-implantation-of-unicompartmental-knee-arthroplasty-on-cement-penetration-and-biomechanical-stability-an-experimental-study-in-human-tibiae
#20
C Scheele, M F Pietschmann, C Schröder, T Grupp, M Holderied, V Jansson, P E Müller
No abstract text is available yet for this article.
November 16, 2017: Clinical Biomechanics
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