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'Total knee replacement'

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https://www.readbyqxmd.com/read/28521834/incidence-of-total-hip-or-knee-replacement-due-to-osteoarthritis-in-relation-to-thyroid-function-a-prospective-cohort-study-the-nord-tr%C3%A3-ndelag-health-study
#1
Alf Inge Hellevik, Marianne Bakke Johnsen, Arnulf Langhammer, Anne Marie Fenstad, Ove Furnes, Kjersti Storheim, John Anker Zwart, Gunnar Flugsrud, Lars Nordsletten
BACKGROUND: To study whether thyroid function was associated with risk of hip or knee replacement due to primary osteoarthritis. METHODS: In a prospective cohort study, data from the second and third survey of the Nord-Trøndelag Health Study were linked to the Norwegian Arthroplasty Register in order to identify total hip or knee replacement as a result of primary osteoarthritis. RESULTS: Among 37 891 participants without previously known thyroid disease we recorded 978 total hip replacements (THRs) and 538 total knee replacements (TKRs) during a median follow-up time of 15...
May 18, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28500496/patient-specific-instrumentation-improves-alignment-of-lateral-unicompartmental-knee-replacements-by-novice-surgeons
#2
Chin Ting Justin Ng, Simon Newman, Simon Harris, Susannah Clarke, Justin Cobb
PURPOSE: Patient-specific instrumentation (PSI) has the potential to offer numerous benefits-not least of all, improved resection accuracy; but its potential has not been realised in clinical studies. An explanation may be the focus of such studies on the total knee replacement (TKR-a common procedure, with which surgeons are generally very familiar. Consequently, we sought to investigate the potential role of PSI in guiding novice surgeons to perform the more technically demanding and less familiar lateral unicondylar knee replacement (LUKR)...
May 13, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28497104/stress-fracture-of-the-lateral-femoral-condyle-after-total-knee-arthroplasty
#3
Mohammad M Sarzaeem, Mahmood Jabalameli
BACKGROUND: This is to assess one of the rare complications after total knee replacement and to assess risk factors of failure. METHODS: 11 patients with varus knee and an average age of 67 years underwent TKA between 2005 and 2013. All patients returned with a sudden sharp knee pain, disability to walk and significant decrease in ROM about 4 to 8 weeks after surgery. Radiographic examination revealed a lateral femoral condylar stress fracture. RESULTS: After analyzing the images, we found common characteristics among all patients, which might be attributable to the later fracture including varus deformity>25, femoral component lateralization, and valgus correction...
March 2017: Archives of Bone and Joint Surgery
https://www.readbyqxmd.com/read/28494898/the-effect-of-desflurane-versus-propofol-anesthesia-on-postoperative-delirium-in-elderly-obese-patients-undergoing-total-knee-replacement-a-randomized-controlled-double-blinded-clinical-trial
#4
Pedro Tanaka, Stuart Goodman, Barbara R Sommer, William Maloney, James Huddleston, Hendrikus J Lemmens
STUDY OBJECTIVE: The goal of this study was to investigate the incidence of delirium, wake-up times and early post-operative cognitive decline in one hundred obese elderly patients undergoing total knee arthroplasty. DESIGN: Prospective randomized trial. SETTINGS: Operating room, postoperative recovery area, hospital wards. PATIENTS: 100 obese patients (ASA II and III) undergoing primary total knee replacement under general anesthesia with a femoral nerve block catheter...
June 2017: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/28488017/c-reactive-protein-course-during-the-first-5-days-after-total-knee-arthroplasty-cannot-predict-early-prosthetic-joint-infection
#5
Christoph Windisch, Steffen Brodt, Eric Roehner, Georg Matziolis
INTRODUCTION: Periprosthetic joint infection (PJI) is one of the most devastating major complications after total knee arthroplasty (TKA). The laboratory value C-reactive protein (CRP) is the inflammatory biomarker most suitable for detecting a potential postoperative (p.o.) early infection in orthopaedic surgery. However, on the basis of multiple receiver operating characteristic (ROC) analyses, CRP only has limited sensitivity and specificity. The objective of the present study was to test the hypothesis that, besides the absolute preoperative CRP value, also the absolute postoperative CRP value and its course over the first 5 days after TKA are valid indicators of periprosthetic early infection...
May 9, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28476062/patient-reported-outcomes-following-single-and-multiple-radius-total-knee-replacement-a-randomized-controlled-trial
#6
Nadeem Mushtaq, Alexander D Liddle, David Isaac, Katherine Dillow, Paul Gill
Although single-radius (SR) designs of total knee replacement (TKR) have theoretical benefits, the clinical advantage conferred by such designs is unknown. The aim of this randomized, controlled study was to compare the short-term clinical outcomes of the two design rationales. A total of 105 knees were randomized to receive either a single radius (Scorpio, Stryker; SR Group) or multiple radius (AGC, Zimmer Biomet; MR group) TKR. Patient-reported outcomes (Oxford Knee Score [OKS] and Knee Society Score [KSS]) were collected at 6 weeks, 6 months, and 1 year following surgery...
May 5, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28471033/the-decision-making-threshold-and-the-factors-that-affect-it-a-qualitative-study-of-patients-decision-making-in-knee-replacement-surgery
#7
T Barlow, P Scott, L Thomson, D Griffin, A Realpe
BACKGROUND: Osteoarthritis is a significant cause of burden to the ageing population and knee replacement is a common operation for treatment of end-stage disease. We aimed to explore these factors to help understand patients' decision-making, which is critical in informing patient-centred care. These can be used to enhance decision-making and dialogue between clinicians and patients, allowing a more informed choice. METHODS: The study consisted of two focus groups, in a patient cohort after total knee replacement followed by more in-depth interviews to further test and explore themes from the focus groups, in patients in either the deliberation stage or the decision-making stage...
May 4, 2017: Musculoskeletal Care
https://www.readbyqxmd.com/read/28464040/pulsed-lavage-cleansing-of-osteochondral-grafts-depends-on-lavage-duration-flow-intensity-and-graft-storage-condition
#8
Yang Sun, Weibo Jiang, Esther Cory, Jason P Caffrey, Felix H Hsu, Albert C Chen, Jincheng Wang, Robert L Sah, William D Bugbee
INTRODUCTION: Osteochondral allograft (OCA) transplantation is generally effective for treating large cartilage lesions. Cleansing OCA subchondral bone to remove donor marrow elements is typically performed with pulsed lavage. However, the effects of clinical and experimental parameters on OCA marrow removal by pulsed lavage are unknown. The aim of the current study was to determine the effects on marrow cleansing in human osteochondral cores (OCs) of (1) lavage duration, (2) lavage flow intensity, and (3) OC sample type and storage condition...
2017: PloS One
https://www.readbyqxmd.com/read/28462655/the-effect-of-numbness-on-outcome-from-total-knee-replacement
#9
J Blackburn, V Wylde, R Greenwood, A W Blom, A Levy
INTRODUCTION Some patients report continuing pain and functional limitations after total knee replacement (TKR). While numbness around the TKR scar is common, the impact of numbness is less clear. One particular activity that could be influenced by numbness is kneeling. The aim of this study was to explore the impact of numbness around TKR scars on health related quality of life and kneeling ability. METHODS Fifty-six patients were recruited one year after primary TKR. Sensation around the knee was assessed through patient self-reporting, monofilament testing and vibration, and patients' distress was measured on a visual analogue scale...
May 2017: Annals of the Royal College of Surgeons of England
https://www.readbyqxmd.com/read/28462424/evaluation-of-a-surrogate-contact-model-in-multi-body-dynamic-simulations-of-total-knee-replacement
#10
Marco A Marra, Michael S Andersen, Michael Damsgaard, Bart F J M Koopman, Dennis Janssen, Nico Verdonschot
Knowing the forces in the human body is of great clinical interest and musculoskeletal models are the most commonly used tool to estimate them in vivo. Unfortunately, the process of computing muscle, joint contact and ligament forces simultaneously is computationally highly demanding. The goal of this study was to develop a fast surrogate model of the tibiofemoral (TF) contact in a total knee replacement (TKR) model and apply it to force-dependent kinematic simulations of activities of daily living (ADLs). Multiple domains were populated with sample points from the reference TKR contact model, based on reference simulations and design-of-experiments...
May 2, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28462215/condylar-constrained-system-in-primary-total-knee-replacement-our-experience-and-literature-review
#11
Luigi Sabatini, Salvatore Risitano, Lorenzo Rissolio, Andrea Bonani, Francesco Atzori, Alessandro Massè
BACKGROUND: Constrained condylar knee (CCK) prosthesis are common used for revision surgery but can also help surgeons to improve implant stability in primary knee arthroplasty, in fact in severe knee arthrosis with serious deformity associated with a significant instability a more constrained articulation is required. With introduction of second generation of semi-constrained prosthesis, rate of complication is real decreased and a good survival rate and functional score results is showed...
March 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28452065/trabecular-resorption-patterns-of-cement-bone-interlock-regions-in-total-knee-replacements
#12
Jacklyn R Goodheart, Mark A Miller, Megan E Oest, Kenneth A Mann
With in vivo service there is loss of mechanical interlock between trabeculae and PMMA cement in total knee replacements. The mechanisms responsible for the loss of interlock are not known, but loss of interlock results in weaker cement-bone interfaces. The goal of this study was to determine the pattern of resorption of interdigitated bone using a series of 20 postmortem retrieved knee replacements with a wide range of time in service (3 to 22 years). MicroCT scans were obtained of a segment of the cement-bone interface below the tibial tray for each implant...
April 27, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28448711/-cemented-polyethylene-insert-in-a-well-fixed-total-knee-replacement-case-report
#13
F E García-Dobarganes Barlow, J Negrete-Corona, A A Díaz-Tovar
We present the case of a 94 years- old patient, which was operated 14 years ago of a right total knee replacement for osteoarthritis, actually she suffers of pain and instability; her X ray shown polyethylene wear without loosening of the metal components. The polyethylene insert is not manufactured anymore so we decided cement a new polyethylene insert on the native tibial baseplate. The two years follow up show us a patient asymptomatic, good function and no radiolucencies on the tibial component. We only found a similar case report in Madrid and we believed that this decision, taken from total hip revisions, will succeed...
September 2016: Acta Ortopédica Mexicana
https://www.readbyqxmd.com/read/28439057/-calcium-and-bone-metabolism-across-women-s-life-stages-osteoporosis-in-female-patients-with-rheumatoid-arthritis
#14
Takefumi Furuya
Female patients with rheumatoid arthritis(RA)are at high risk for osteoporosis and fractures. In Japanese female patients with RA, age, disability, daily prednisolone dose, history of total knee replacement, and low bone mineral density are known to be risk factors for fractures, and more than 70% are reported to be vitamin D deficiency.
2017: Clinical Calcium
https://www.readbyqxmd.com/read/28436958/local-clearance-of-senescent-cells-attenuates-the-development-of-post-traumatic-osteoarthritis-and-creates-a-pro-regenerative-environment
#15
Ok Hee Jeon, Chaekyu Kim, Remi-Martin Laberge, Marco Demaria, Sona Rathod, Alain P Vasserot, Jae Wook Chung, Do Hun Kim, Yan Poon, Nathaniel David, Darren J Baker, Jan M van Deursen, Judith Campisi, Jennifer H Elisseeff
Senescent cells (SnCs) accumulate in many vertebrate tissues with age and contribute to age-related pathologies, presumably through their secretion of factors contributing to the senescence-associated secretory phenotype (SASP). Removal of SnCs delays several pathologies and increases healthy lifespan. Aging and trauma are risk factors for the development of osteoarthritis (OA), a chronic disease characterized by degeneration of articular cartilage leading to pain and physical disability. Senescent chondrocytes are found in cartilage tissue isolated from patients undergoing joint replacement surgery, yet their role in disease pathogenesis is unknown...
April 24, 2017: Nature Medicine
https://www.readbyqxmd.com/read/28427318/load-application-for-the-contact-mechanics-analysis-and-wear-prediction-of-total-knee-replacement
#16
Jing Zhang, Zhenxian Chen, Ling Wang, Dichen Li, Zhongmin Jin
Tibiofemoral contact forces in total knee replacement have been measured at the medial and lateral sites respectively using an instrumented prosthesis, and predicted from musculoskeletal multibody dynamics models with a reasonable accuracy. However, it is uncommon that the medial and lateral forces are applied separately to replace a total axial load according to the ISO standard in the majority of current finite element analyses. In this study, we quantified the different effects of applying the medial and lateral loads separately versus the traditional total axial load application on contact mechanics and wear prediction of a patient-specific knee prosthesis...
May 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28409132/do-patients-lose-weight-after-total-knee-replacement
#17
Carlos Roberto Schwartsmann, Alexandre Moreira Borges, Geraldo Luiz Schuck de Freitas, Eduardo Zaniol Migon, Gustavo Kaempf de Oliveira, Marcos Wainberg Rodrigues
OBJECTIVE: Several studies show that patients undergoing total knee arthroplasty (TKA) tend to maintain or gain weight after the procedure, which would result in increased wear of the prosthesis and new surgical interventions in a smaller period of time in comparison with patients with adequate body mass index (BMI). The aim of this study was to investigate the effect of TKA surgery on these patients' BMI. METHODS: Initially the records were analyzed, chosen at random from 91 patients undergoing TKA during the period from August 2011 to July 2013...
March 2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/28387436/2d-3d-reconstruction-of-the-distal-femur-using-statistical-shape-models-addressing-personalized-surgical-instruments-in-knee-arthroplasty-a-feasibility-analysis
#18
Pietro Cerveri, Costanza Sacco, Gianluca Olgiati, Alfonso Manzotti, Guido Baroni
BACKGROUND: Personalized surgical instruments (PSI) have gained success in the domain of total knee replacement, demonstrating clinical outcomes similar or even superior to both traditional and navigated surgeries. The key requirement for prototyping PSI is the availability of the digital bony surface. In this paper, we aim at verifying whether the 2D/3D reconstruction of the distal femur, based on statistical shape models (SSM), grants sufficient accuracy, especially in the condylar regions, to support a PSI technique...
April 7, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28375889/the-main-cause-of-death-following-primary-total-hip-and-knee-replacement-for-osteoarthritis-a-cohort-study-of-26-766-deaths-following-332-734-hip-replacements-and-29-802-deaths-following-384-291-knee-replacements
#19
Linda P Hunt, Yoav Ben-Shlomo, Michael R Whitehouse, Martyn L Porter, Ashley W Blom
BACKGROUND: Patients undergoing primary total joint replacement are selected for surgery and thus (other than having a transiently increased mortality rate postoperatively) have a lower mortality rate than age and sex-matched individuals do. Understanding the causes of death following joint replacement would allow targeted strategies to reduce the risk of death and optimize outcome. We aimed to determine the rates and causes of mortality for patients undergoing primary total hip or knee replacement compared with individuals in the general population who were matched for age and sex...
April 5, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28373981/socs1-regulates-apoptosis-and-inflammation-by-inhibiting-il-4-signaling-in-il-1%C3%AE-stimulated-human-osteoarthritic-chondrocytes
#20
Qiang He, Caihong Sun, Wei Lei, Jianbing Ma
Recently, Suppressor of Cytokine Signaling 1 (SOCS1) was identified as a potential therapeutic target for osteoarthritis (OA) treatment. However, the mechanisms and signaling pathways of SOCS1 in the regulation of OA development are unclear. The purpose of the current study was to investigate whether interleukin- (IL-) 4 was involved in regulatory mechanism of SOCS1 in human osteoarthritic chondrocytes. First, IL-1β was used to stimulate human osteoarthritic chondrocytes isolated from the articular cartilage of OA patients undergoing total knee replacement...
2017: BioMed Research International
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