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https://www.readbyqxmd.com/read/29450566/unicompartmental-knee-arthroplasty-fails-to-completely-restore-normal-gait-patterns-during-level-walking
#1
Myung-Ku Kim, Jung-Ro Yoon, Se-Hyun Yang, Young-Soo Shin
PURPOSE: Gait analysis is a valuable instrument for measuring function objectively after unicompartmental knee arthroplasty (UKA). However, most gait analysis studies have reported conflicting results for functional assessment after UKA. This meta-analysis compared the gait patterns of UKA patients and healthy controls during level walking. METHODS: Studies were included in the meta-analysis if they recorded vertical ground reaction force (GRF), flexion at initial contact, flexion at loading response, extension at mid-stance, flexion at swing, walking speed, cadence, and stride length in UKA patients or healthy controls...
February 15, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29441501/choosing-between-unicompartmental-and-total-knee-replacement-what-can-economic-evaluations-tell-us-a-systematic-review
#2
REVIEW
Edward Burn, Alexander D Liddle, Thomas W Hamilton, Sunil Pai, Hemant G Pandit, David W Murray, Rafael Pinedo-Villanueva
BACKGROUND AND OBJECTIVE: Patients with anteromedial arthritis who require a knee replacement could receive either a unicompartmental knee replacement (UKR) or a total knee replacement (TKR). This review has been undertaken to identify economic evaluations comparing UKR and TKR, evaluate the approaches that were taken in the studies, assess the quality of reporting of these evaluations, and consider what they can tell us about the relative value for money of the procedures. METHODS: A search of MEDLINE, EMBASE and the Centre for Reviews and Dissemination National Health Service Economic Evaluation Database was undertaken in January 2016 to identify relevant studies...
December 2017: PharmacoEconomics Open
https://www.readbyqxmd.com/read/29424234/osteochondral-allograft-transplantation-of-the-knee-in-patients-with-an-elevated-body-mass-index
#3
Dean Wang, Brian J Rebolledo, David M Dare, Mollyann D Pais, Matthew R Cohn, Kristofer J Jones, Riley J Williams
Objective To characterize the graft survivorship and clinical outcomes of osteochondral allograft transplantation (OCA) of the knee in patients with an elevated body mass index (BMI). Design Prospective data on 38 consecutive patients with a BMI ≥30 kg/m2 treated with OCA from 2000 to 2015 were reviewed. Complications, reoperations, and patient responses to validated outcome measures were examined. Failures were defined by any removal/revision of the allograft or conversion to arthroplasty. Results Thirty-one knees in 31 patients (mean age, 35...
February 1, 2018: Cartilage
https://www.readbyqxmd.com/read/29406457/bearing-dislocation-and-progression-of-osteoarthritis-after-mobile-bearing-unicompartmental-knee-arthroplasty-vary-between-asian-and-western-patients-a-meta-analysis
#4
Kyung-Han Ro, Jae-Won Heo, Dae-Hee Lee
BACKGROUND: Implant survivorship is reported to be lower and complications, particularly bearing dislocation, are reported to be more frequent in Asian than in Western patients with medial knee osteoarthritis (OA) undergoing Oxford Phase III unicompartmental knee arthroplasty (UKA). To date, however, these complications have not been compared between these groups of patients. QUESTIONS/PURPOSES: The purpose of this study was to perform a meta-analysis comparing the standardized incidence rates of (1) all-cause reoperation; (2) reoperation related to bearing dislocation; and (3) reoperation related to progression of lateral compartment arthritis in Asian and Western patients with medial knee OA who underwent Oxford Phase III UKA...
February 2, 2018: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/29406129/a-decision-making-tool-to-prescribe-knee-orthoses-in-daily-practice-for-patients-with-osteoarthritis
#5
Emmanuel Coudeyre, Christelle Nguyen, Aurore Chabaud, Bruno Pereira, Johann Beaudreuil, Jean-Marie Coudreuse, Philippe Deat, Frédéric Sailhan, Alain Lorenzo, François Rannou
OBJECTIVE: To develop a decision-making tool (DMT) to facilitate the prescription of knee orthoses for patients with osteoarthritis (OA) in daily practice. METHODS: A steering committee gathered a multidisciplinary task force experienced in OA management/clinical research. Two members performed a literature review with qualitative analysis of the highest-quality randomized controlled trials and practice guidelines to confirm evidence concerning knee orthosis for OA...
February 2, 2018: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/29398257/a-comparison-of-mobile-and-fixed-bearing-unicompartmental-knee-arthroplasty-at-a-minimum-10-year-follow-up
#6
Michael E Neufeld, Anthony Albers, Nelson V Greidanus, Donald S Garbuz, Bassam A Masri
BACKGROUND: The long-term survivorship and functional outcomes of the mobile-bearing (MB) compared to the fixed-bearing (FB) unicompartmental knee arthroplasty (UKA) implant design remain a topic of debate. The aim of the current study was to compare the survivorship and functional outcomes of MB and FB UKA at a minimum 10-year follow-up. METHODS: We retrospectively reviewed 106 consecutive medial UKAs (89 patients) from our institution with a minimum 10-year follow-up...
January 11, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29390376/better-clinical-outcomes-after-unicompartmental-knee-arthroplasty-when-comparing-with-high-tibial-osteotomy
#7
Seung-Beom Han, Hee-Soo Kyung, In-Wook Seo, Young-Soo Shin
BACKGROUND: Both high tibial osteotomy (HTO) and unicompartmental knee arthroplasty (UKA) are well-established treatments for medial knee osteoarthritis (OA). However, it is unclear whether HTO or UKA leads to better clinical outcomes and lower complication rates. This meta-analysis compared the clinical outcomes and complications of HTO and UKA in patients with medial knee OA. METHODS: All studies comparing the functional outcome, postoperative pain, revision rate to total knee arthroplasty (TKA), postoperative complications, postoperative velocity, and postoperative range of motion (ROM) as assessed with various measurement tools in patients with medial knee OA treated with HTO or UKA were included...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29387646/assessment-of-patient-functional-performance-in-different-knee-arthroplasty-designs-during-unconstrained-squat
#8
Federica Verdini, Claudio Zara, Tommaso Leo, Alessandro Mengarelli, Stefano Cardarelli, Bernardo Innocenti
Background: In this paper, squat named by Authors unconstrained because performed without constrains related to feet position, speed, knee maximum angle to be reached, was tested as motor task revealing differences in functional performance after knee arthroplasty. It involves large joints ranges of motion, does not compromise joint safety and requires accurate control strategies to maintain balance. Methods: Motion capture techniques were used to study squat on a healthy control group (CTR) and on three groups, each characterised by a specific knee arthroplasty design: a Total Knee Arthroplasty (TKA), a Mobile Bearing and a Fixed Bearing Unicompartmental Knee Arthroplasty (respectively MBUA and FBUA)...
July 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/29387472/return-to-sport-after-total-or-unicompartmental-knee-arthroplasty-an-informative-guide-for-residents-to-patients
#9
Louis Dagneaux, Julien Bourlez, Benjamin Degeorge, François Canovas
Knee arthroplasty survival rate - either UKA or TKA - is currently 95%, greater than it was ten years ago, but has not been specifically evaluated in very active patients practicing sport at a high intensity.The terms and conditions of return to physical activities are decided by the surgeon, the rehabilitation or Sports Medicine doctor, who needs to make sure that postoperative rehabilitation has been conducted optimally. Specifically, range of movement must be complete, muscular strengthening has to be sufficient and balance must be recovered by proprioception...
December 2017: EFORT Open Reviews
https://www.readbyqxmd.com/read/29381882/surgical-accuracy-of-an-early-intervention-knee-implant-instrumentation-system
#10
Mike Lowry, John Buza, James Liu, Heather Rosenbaum, Jessica Lavery, Joseph Bosco, Peter S Walker
Accuracy of component and limb alignment are critical parameters for the long-term success of unicompartmental knee implants. In this study, we performed a laboratory evaluation of an instrumentation system which was designed for an early intervention (EI) type of unicompartmental knee. The accuracy of fit was evaluated by implanting in 20 sawbones full leg models. The overall alignment of the limb was compared pre- and postoperatively. The accuracy of placement of each component on its bone was measured. The mean overall alignment angle in the frontal plane was within 1° of target with less than 1° standard deviation...
January 30, 2018: Journal of Knee Surgery
https://www.readbyqxmd.com/read/29356941/femoral-component-alignment-in-unicompartmental-knee-arthroplasty-leads-to-biomechanical-change-in-contact-stress-and-collateral-ligament-force-in-knee-joint
#11
Kyoung-Tak Kang, Juhyun Son, Changhyun Baek, Oh-Ryong Kwon, Yong-Gon Koh
BACKGROUND: In recent years, the popularity of unicompartmental knee arthroplasty (UKA) has increased. However, the effect of femoral component positioning in UKA continues to invite a considerable debate. The purpose of this study involved assessing the biomechanical effect of mal-alignment in femoral components in UKA under dynamic loading conditions using a computational simulation. METHODS: A validated finite element model was used to evaluate contact stresses in polyethylene (PE) inserts and lateral compartment and force on collateral ligament in the femoral component ranging from 9° of varus to 9° of valgus...
January 22, 2018: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29354423/osteochondral-allograft-transplantation-for-treatment-of-medial-femoral-condyle-defect
#12
Jonathan A Godin, George Sanchez, Mark E Cinque, Jorge Chahla, Nicholas I Kennedy, Matthew T Provencher
Chondral lesions of the knee can affect the young, active population, thereby causing severe morbidity and a large economic burden. Although numerous approaches have been described in the literature, restoration of hyaline cartilage has yet to be shown. Specifically, larger, full-thickness cartilage defects remain a challenge. This Technical Note details our technique for biologic unicompartmental osteochondral allograft transplantation for the treatment of large femoral condyle articular cartilage defects.
August 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29349978/-correlation-of-medial-compartmental-joint-line-elevation-with-femorotibial-angle-correction-and-clinical-function-after-unicompartmental-arthroplasty
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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