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https://www.readbyqxmd.com/read/28636252/influence-of-analyzed-lubricant-volumes-on-the-amount-and-characteristics-of-generated-wear-particles-from-three-different-types-of-polyethylene-liner-materials
#1
Jana Markhoff, Carmen Zietz, Christian Fabry, Gerhard Fulda, Rainer Bader
The articulating components of artificial joints consist mainly of metals, ceramics, or polymers. Resulting abrasive wear particles can promote osteolysis and aseptic loosening of the endo-prosthetic implants. Ultra-high-molecular-weight-polyethylene is the material used most for bearing couples in total hip replacement. In the present study, three types of polyethylene (PE) liners varying in material composition, i.e., (1) conventional PE (C-PE), (2) sequentially cross-linked PE (SX-PE), (3) cross-linked PE blended with vitamin E (EX-PE) articulating with two types of femoral heads were used...
June 21, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28636076/prevalence-and-impact-of-obesity-in-people-with-haemophilia-review-of-literature-and-expert-discussion-around-implementing-weight-management-guidelines
#2
REVIEW
S Kahan, A Cuker, R F Kushner, J Maahs, M Recht, T Wadden, T Willis, S Majumdar, D Ungar, D Cooper
Obesity affects more than 35% of Americans, increasing the risk of more than 200 comorbid conditions, impaired quality of life and premature mortality. This review aimed to summarize literature published over the past 15 years regarding the prevalence and impact of obesity in people with haemophilia (PWH) and to discuss implementing general guidelines for weight management in the context of the haemophilia comprehensive care team. Although few studies have assessed the effects of obesity on haemophilia-specific outcomes, existing evidence indicates an important impact of weight status on lower extremity joint range of motion and functional disability, with potentially important effects on overall quality of life...
June 21, 2017: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/28635681/antimicrobial-activity-of-nitric-oxide-releasing-ti-6al-4v-metal-oxide
#3
Nina A Reger, Wilson S Meng, Ellen S Gawalt
Titanium and titanium alloy materials are commonly used in joint replacements, due to the high strength of the materials. Pathogenic microorganisms can easily adhere to the surface of the metal implant, leading to an increased potential for implant failure. The surface of a titanium-aluminum-vanadium (Ti-6Al-4V) metal oxide implant material was functionalized to deliver an small antibacterial molecule, nitric oxide. S-nitroso-penicillamine, a S-nitrosothiol nitric oxide donor, was covalently immobilized on the metal oxide surface using self-assembled monolayers...
June 21, 2017: Journal of Functional Biomaterials
https://www.readbyqxmd.com/read/28634095/comparative-effectiveness-and-safety-of-drug-prophylaxis-for-prevention-of-venous-thromboembolism-after-total-knee-arthroplasty
#4
Guy Cafri, Elizabeth W Paxton, Yuexin Chen, Craig T Cheetham, Michael K Gould, Janet Sluggett, Stefano A Bini, Monti Khatod
BACKGROUND: Rates of venous thromboembolism in contemporary studies of primary total knee arthroplasty (TKA) have been reported to be as high as 3.5%. Although drug prophylaxis is effective, the best option among these regimens is not well established. The purpose of this study was to evaluate the comparative effectiveness and safety of aspirin, low-molecular-weight heparin, synthetic pentasaccharide factor Xa inhibitors, and vitamin K antagonist. METHODS: Data were from a US total joint replacement registry, with 30,499 patients receiving unilateral TKA from May 16, 2006, to December 31, 2013...
May 31, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28633801/total-talar-prosthesis-replacement-after-talar-extrusion
#5
Sébastien Ruatti, Clémentine Corbet, Mehdi Boudissa, Gael Kerschbaumer, Michel Milaire, Philippe Merloz, Jérôme Tonetti
Dislocation of the talus is a serious and extremely rare injury, with 86 cases reported in the published data in 20 years. The reference standard for case management involves replacement of the dislocated talus to restore the height and function of the tibiotalar joint. The risk of avascular necrosis remains very high, and the standard treatment in such cases is tibiotalar arthrodesis. We report the case of total dislocation of the talus, which was treated with the insertion of a custom total talar prosthesis affixed directly to the tibial cartilage at 6 months after injury...
July 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28633788/fluoroscopic-and-gait-analyses-for-the-functional-performance-of%C3%A2-a%C3%A2-custom-made-total-talonavicular-replacement
#6
Claudio Belvedere, Matteo Cadossi, Antonio Mazzotti, Sandro Giannini, Alberto Leardini
The present study evaluated the restoration of joint function in a special clinical case: a professional rock climber who underwent an original total talonavicular replacement with a custom-made prosthesis after a complex articular fracture. Full body gait analysis and 3-dimensional joint kinematics using single-plane fluoroscopy were performed on the same day at the 30-month follow-up examination. Gait analysis was performed using stereophotogrammetric, dynamometric, electromyographic, and baropodometric systems...
July 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28633787/the-disappearing-phalanx-a-case-report-of-a-vascular-tumor-of%C3%A2-the%C3%A2-toe
#7
Bridget DeSandis, Sydney C Karnovsky, Giorgio Perino, Mark C Drakos
We report a unique case of an epithelioid hemangioma of the third middle phalanx in which the lesion replaced the phalanx, became symptomatic, and then required resection, bone grafting, and joint arthroplasty. To the best of our knowledge, this is the first report of an epithelioid hemangioma in the toe that was treated using this approach.
July 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28633324/mammographic-density-reduction-as-a-prognostic-marker-for-postmenopausal-breast-cancer-results-using-a-joint-longitudinal-survival-modelling-approach
#8
Therese M-L Andersson, Michael J Crowther, Kamila Czene, Per Hall, Keith Humphreys
Previous studies have linked reductions in mammographic density after a breast cancer diagnosis to an improved prognosis. These studies focused on short-term change, using a two-stage process, treating estimated change as a fixed covariate in a survival model. We propose the use of a joint longitudinal-survival model. This enables us to model long-term trends in density while accounting for drop-out as well as for measurement error. We study the change in mammographic density after a breast cancer diagnosis and its association with prognosis (measured by cause-specific mortality), overall and with respect to hormone replacement therapy and tamoxifen treatment...
June 13, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28632602/visits-to-the-emergency-department-after-joint-replacement-commentary-on-an-article-by-micaela-a-finnegan-ba-et-al-emergency-department-visits-following-elective-total-hip-and-knee-replacement-surgery-identifying-gaps-in-continuity-of-care
#9
https://www.readbyqxmd.com/read/28632589/emergency-department-visits-following-elective-total-hip-and-knee-replacement-surgery-identifying-gaps-in-continuity-of-care
#10
Micaela A Finnegan, Robyn Shaffer, Austin Remington, Jereen Kwong, Catherine Curtin, Tina Hernandez-Boussard
BACKGROUND: Major joint replacement surgical procedures are common, elective procedures with a care episode that includes both inpatient readmissions and postoperative emergency department (ED) visits. Inpatient readmissions are well studied; however, to our knowledge, little is known about ED visits following these procedures. We sought to characterize 30-day ED visits following a major joint replacement surgical procedure. METHODS: We used administrative records from California, Florida, and New York, from 2010 through 2012, to identify adults undergoing total knee and hip arthroplasty...
June 21, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28632502/targeting-activated-protein-c-to-treat-hemophilia
#11
Stéphanie G I Polderdijk, Trevor P Baglin, James A Huntington
PURPOSE OF REVIEW: Hemophilia is a debilitating disease, marked by frequent, painful bleeding events, joint deterioration and early death. All current treatments consist of i.v. infusions of replacement factor or other procoagulant factors, and are incompletely effective, due in part to the short half-lives of the proteins. An alternative approach is to rebalance hemostasis by inhibiting natural anticoagulant mechanisms. In this article, we explain why activated protein C (APC) is an appropriate and safe target for the treatment of hemophilia...
June 16, 2017: Current Opinion in Hematology
https://www.readbyqxmd.com/read/28630749/imaging-in-peri-prosthetic-assessment-an-orthopaedic-perspective
#12
Christoph H Lohmann, Sanjiv Rampal, Martin Lohrengel, Gurpal Singh
As imaging techniques are ever-evolving, this article aims to provide a brief overview of the various modalities including their limitations. The ability of imaging for evaluation of implant osseo-integration will be addressed and also the role of imaging in assessing septic and aseptic loosening, with a particular focus on adverse tissue reactions, will be discussed. Specific features when imaging the big joints such as shoulder, hip, knee and ankle joint will also be outlined.Overall, a lack of standardisation and validity was noted and despite the gross variety of imaging modalities, there is no technique covering all aspects required for evaluation of implant fixation and septic and aseptic loosening...
May 2017: EFORT open reviews
https://www.readbyqxmd.com/read/28630723/outcome-after-arthroscopic-labral-surgery-in-patients-previously-treated-with-periacetabular-osteotomy-a-follow-up-study-of-43-patients
#13
Charlotte Hartig-Andreasen, Torsten G Nielsen, Bent Lund, Kjeld Søballe, Martin Lind
To identify factors predicting failure after hip arthroscopy in patients with previous periacetabular osteotomy (PAO) defined as a conversion to total hip replacement (THR) and to evaluate the patient reported outcome scores. Of 55 hips treated with hip arthroscopy after PAO from Aug 2008 to 2012 at Aarhus University Hospital, 43 hips were included (median age: 36.1 yrs, range 16.3-56.9 yrs). Indications were unacceptable pain, a positive FABER and impingement test and signs of labral damage on MR-arthrography...
January 2017: Journal of Hip Preservation Surgery
https://www.readbyqxmd.com/read/28629904/perioperative-morbidity-of-same-day-and-staged-bilateral-total-hip-arthroplasty
#14
Lazaros A Poultsides, Georgios K Triantafyllopoulos, Stavros G Memtsoudis, Huong T Do, Michael M Alexiades, Thomas P Sculco
BACKGROUND: Management strategies for bilateral hip degenerative disease include same-day or staged bilateral total hip arthroplasty (THA), but information on outcomes remains sparse. We sought to describe in-hospital complications and blood transfusion rates after same-day and staged bilateral THAs at different time intervals and to assess risk factors for these events. METHODS: We retrospectively reviewed administrative data for 3785 patients treated with same-day bilateral (n = 1946; group A) and staged bilateral THA within (1) 0-3 months apart (n = 328; group B); (2) 3-6 months apart (n = 703; group C); and (3) 6-12 months apart (n = 808; group D), between 1999 and 2014...
May 23, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28629601/a-custom-made-temporomandibular-joint-prosthesis-for-fabrication-by-selective-laser-melting-finite-element-analysis
#15
Xiangliang Xu, Danmei Luo, Chuanbin Guo, Qiguo Rong
A novel and custom-made selective laser melting (SLM) 3D-printed alloplastic temporomandibular joint (TMJ) prosthesis is proposed. The titanium-6aluminium-4vanadium (Ti-6Al-4V) condyle component and ultra-high molecular weight polyethylene (UHMWPE) fossa component comprised the total alloplastic TMJ replacement prosthesis. For the condyle component, an optimized tetrahedral open-porous scaffold with combined connection structures, i.e. an inlay rod and an onlay plate, between the prosthesis and remaining mandible was designed...
June 16, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28626592/diffuse-b-cell-non-hodgkin-s-lymphoma-presenting-atypically-as-periprosthetic-joint-infection-in-a-total-hip-replacement
#16
Aysha Rajeev, Angela Ralte, Nameer Choudhry, Faizan Jabbar, Paul Banaszkiewicz
The occurrence of extranodal primary B cell non-Hodgkin's lymphoma is rare. Total hip replacement is one of the most common orthopaedic procedures performed. There has been an increased incidence of primary lymphomas involving periprosthetic sites. Chronic inflammation due to metal debris arising from the prosthetic implants has been evidenced as one of the causes for the development of soft tissue lymphomas albeit rarely. We describe a case report of a 77-year-old patient who had underwent a cemented total hip replacement in the past who further developed large B cell primary non-Hodgkin's lymphoma...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/28624294/patient-decision-aids-for-patients-considering-total-joint-replacement-a-cost-effectiveness-analysis-alongside-a-randomised-controlled-trial
#17
Logan Trenaman, Dawn Stacey, Stirling Bryan, Monica Taljaard, Gillian Hawker, Geoff Dervin, Peter Tugwell, Nick Bansback
BACKGROUND: Shared decision-making (SDM) is a key priority to improve patient-centred care, and can play an important role in helping patients decide whether to undergo total joint arthroplasty (TJA). Patient decision aids can support SDM; however, they may incur an upfront cost. We aimed to estimate the health and economic effects of patient decision aids for TJA. METHODS: A cost-effectiveness analysis of a randomised controlled trial with 2-year follow-up. 343 patients were recruited from two orthopedic screening clinics in Ottawa, Canada...
June 14, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28623683/the-effects-of-unilateral-alloplastic-temporomandibular-joint-replacement-on-the-opposite-side-natural-joint-a-finite-element-analysis
#18
Burak Bekcioglu, Emel Bulut, Burcu Baş
PURPOSE: The purpose of this study was to evaluate the stress distribution on the temporomandibular joint (TMJ) prosthesis and contralateral natural TMJ with finite-element analysis. MATERIALS AND METHODS: A TMJ implant was used to create a 3-dimensional model with a computer. This model was integrated with a mandible model created with a computer by use of computed tomography images, similar to a real TMJ replacement procedure. Masticatory loads were applied to the model...
May 24, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28621842/study-on-morphological-characteristics-and-microscopic-structure-of-medicinal-organs-of-pulsatilla-chinensis-bunge-regel
#19
Wen-Hao Wang, Jun Yang, Hua-Sheng Peng, Jiang-Ping Qian
Modern clinical studies have found that Pulsatilla radix contains a variety of active ingredients; however, its medicinal parts and microstructure have been controversial. Based on morphological observation and microscopic identification of different structures, we chose Anhui, Henan, Jilin, and Shanxi Province to study Pulsatilla chinensis (Bunge) Regel populations. We specifically addressed different diameters and anatomical structures of different parts of underground organs. We also found that P. chinensis (Bunge) Regel had a "joint point" structure in its underground organ...
June 16, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/28616637/calcaneal-cysts-and-lipomas-a-common-pathogenesis
#20
REVIEW
Jacques Malghem, Frédéric Lecouvet, Bruno Vande Berg
Calcaneal cysts and lipomas are relatively rare, benign bone lesions. They are similar in many ways, including in their location and radiological appearance, but their content differs. Cysts contain fluid whereas lipomas contain fat, although some lesions may exhibit a mixed content. The pathogenesis of the two entities is the subject of controversy. The theory that calcaneal cysts may result from lipomatous necrosis has been widely suggested in the literature, but no such progression has ever been shown. The contrary hypothesis has also been considered, i...
June 14, 2017: Skeletal Radiology
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