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https://www.readbyqxmd.com/read/28227889/shape-memory-alloy-smart-knee-spacer-to-enhance-knee-functionality-model-design-and-finite-element-analysis
#1
Arvind Gautam, A Bhargavi Rani, Miguel A Callejas, Swati Ghosh Acharyya, Amit Acharyya, Dwaipayan Biswas, Vasundhra Bhandari, Paresh Sharma, Ganesh R Naik, Arvind Gautam, A Bhargavi Rani, Miguel A Callejas, Swati Ghosh Acharyya, Amit Acharyya, Dwaipayan Biswas, Vasundhra Bhandari, Paresh Sharma, Ganesh R Naik, Swati Ghosh Acharyya, Paresh Sharma, Vasundhra Bhandari, A Bhargavi Rani, Arvind Gautam, Dwaipayan Biswas, Miguel A Callejas, Amit Acharyya
In this paper we introduce Shape Memory Alloy (SMA) for designing the tibial part of Total Knee Arthroplasty (TKA) by exploiting the shape-memory and pseudo-elasticity property of the SMA (e.g. NiTi). This would eliminate the drawbacks of the state-of-the art PMMA based knee-spacer including fracture, sustainability, dislocation, tilting, translation and subluxation for tackling the Osteoarthritis especially for the aged people of 45-plus or the athletes. In this paper a Computer Aided Design (CAD) model using SolidWorks for the knee-spacer is presented based on the proposed SMA adopting the state-of-the art industry-standard geometry that is used in the PMMA based spacer design...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28220275/open-source-vendor-independent-automated-multi-beat-tissue-doppler-echocardiography-analysis
#2
Niti M Dhutia, Massoud Zolgharni, Michael Mielewczik, Madalina Negoita, Stefania Sacchi, Karikaran Manoharan, Darrel P Francis, Graham D Cole
Current guidelines for measuring cardiac function by tissue Doppler recommend using multiple beats, but this has a time cost for human operators. We present an open-source, vendor-independent, drag-and-drop software capable of automating the measurement process. A database of ~8000 tissue Doppler beats (48 patients) from the septal and lateral annuli were analyzed by three expert echocardiographers. We developed an intensity- and gradient-based automated algorithm to measure tissue Doppler velocities. We tested its performance against manual measurements from the expert human operators...
February 20, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28218957/cyclic-fatigue-resistance-of-a-novel-rotary-file-manufactured-using-controlled-memory-ni-ti-technology-compared-to-a-file-made-from-m-wire-file
#3
E Alshwaimi
AIM: To compare the cyclic fatigue properties of a novel file made using controlled memory NiTi technology with those of files made from M-wire. METHODOLOGY: Twelve files with similar cross-sectional geometry and tip size from each of the following groups were tested: Proflexendo made from CMT (PE; size 30 .04) (Nexden, Houston, Tx, USA), ProFile Vortex made from M-wire (PV; size 30 .04) (Dentsply Tulsa Dental, Tulsa, OK, USA), and ProTaper Universal made from regular alloy (PU; F3) (Dentsply Tulsa Dental)...
February 20, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28218472/a-redox-shuttle-accelerates-o2-evolution-of-photocatalysts-formed-in-situ-under-visible-light
#4
Jia-Xin Li, Chen Ye, Xu-Bing Li, Zhi-Jun Li, Xue-Wang Gao, Bin Chen, Chen-Ho Tung, Li-Zhu Wu
A redox shuttle strategy is demonstrated to be a promising approach to accelerate hole removal for efficient O2 production with mesoporous graphitic carbon nitride, WO3 , BiVO4 , NiTi-LDH, and Ag3 PO4 water-oxidation catalysts under visible-light irradiation.
February 20, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28206928/remembering-dr-henry-w-gray-1827-1861-and-his-timeless-contribution-to-modern-medical-education
#5
Niti Shahi, Abigail L Brooks, Charles J Yeo, Scott W Cowan, Gerald A Isenberg
No abstract text is available yet for this article.
November 1, 2016: American Surgeon
https://www.readbyqxmd.com/read/28202740/health-equity-considerations-for-developing-and-reporting-patient-reported-outcomes-in-clinical-trials-a-report-from-the-omeract-equity-special-interest-group
#6
Jennifer Petkovic, Jennifer L Barton, Caroline Flurey, Niti Goel, Christie M Bartels, Cheryl Barnabe, Maarten P T de Wit, Anne Lyddiatt, Diane Lacaille, Vivian Welch, Annelies Boonen, Beverley Shea, Robin Christensen, Lara J Maxwell, Willemina Campbell, Janet Jull, Karine Toupin-April, Jasvinder A Singh, Charles H Goldsmith, Antoine G Sreih, Christoph Pohl, Catherine Hofstetter, Dorcas E Beaton, Rachelle Buchbinder, Francis Guillemin, Peter S Tugwell
OBJECTIVE: Despite advances integrating patient-centered outcomes into rheumatologic studies, concerns remain regarding their representativeness across diverse patient groups and how this affects equity. The Outcome Measures in Rheumatology (OMERACT) Equity Working Group aims to determine whether and how to address equity issues within the core outcome sets of domains and instruments. METHODS: We surveyed current and previous OMERACT meeting attendees and members of the Campbell and Cochrane Equity Group regarding whether to address equity issues within the OMERACT Filter 2...
February 15, 2017: Journal of Rheumatology
https://www.readbyqxmd.com/read/28198973/influence-of-niti-alloy-on-the-root-canal-shaping-capabilities-of-the-protaper-universal-and-protaper-gold-rotary-instrument-systems
#7
Jussaro Alves Duque, Rodrigo Ricci Vivan, Bruno Cavalini Cavenago, Pablo Andrés Amoroso-Silva, Ricardo Affonso Bernardes, Bruno Carvalho de Vasconcelos, Marco Antonio Hungaro Duarte
Objective: This study aimed to evaluate the influence of the NiTi wire in Conventional NiTi (ProTaper Universal PTU) and Controlled Memory NiTi (ProTaper Gold PTG) instrument systems on the quality of root canal preparation. Material and Methods: Twelve mandibular molars with separate mesial canals were scanned using a high-definition microcomputed tomography system. The PTU and PTG instruments were used to shape twelve mesial canals each. The canals were scanned after preparation with F2 and F3 instruments of the PTU and PTG systems...
January 2017: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/28188122/drug-resistance-detection-and-mutation-patterns-of-multidrug-resistant-tuberculosis-strains-from-children-in-delhi
#8
Jyoti Arora, Ritu Singhal, Manpreet Bhalla, Ajoy Verma, Niti Singh, Digamber Behera, Rohit Sarin, Vithal Prasad Myneedu
A total of 312 sputum samples from pediatric patients presumptive of multidrug resistant tuberculosis were tested for the detection of drug resistance using the GenoTypeMTBDRplus assay. A total of 193 (61.8%) patients were smear positive and 119 (38.1%) were smear negative by Ziehl-Neelsen staining. A line probe assay was performed for 208 samples/cultures (193 smear positive samples and 15 cultures from smear negative samples). Valid results were obtained from 198 tests. Some 125/198 (63.1%) were sensitive to both rifampicin (RIF) and isoniazid (INH), while 73/198 (36...
February 7, 2017: Journal of Epidemiology and Global Health
https://www.readbyqxmd.com/read/28168942/validating-the-factor-structure-and-testing-measurement-invariance-of-modified-short-form-mcgill-pain-questionnaire-ortho-sf-mpq-for-orthodontic-pain-assessment
#9
Satpal S Sandhu
OBJECTIVE: To validate the factor structure of recently modified Short-Form McGill Pain Questionnaire (Ortho-SF-MPQ) to assess orthodontic pain; and to test its Measurement Invariance (MI) across gender. METHODS: 180 orthodontic patients were enrolled in this study. 0.016 inch Super-elastic NiTi arch wire was used in 0.022″ × 0.028″ slot pre-adjusted edgewise appliance. After initial arch wire placement, pain was assessed at T1 (24 hours), T2 (day 3), and T3 (day 7) by using the Ortho-SF-MPQ which consists of seven sensory (pressure, sore, aching, tight, throbbing, pulling, miserable) and four affective (uncomfortable, strange, frustrating, annoying) descriptors...
February 7, 2017: Journal of Orthodontics
https://www.readbyqxmd.com/read/28163461/familial-disseminated-cutaneous-glomuvenous-malformation-treatment-with-polidocanol-sclerotherapy
#10
Aditi Jha, Niti Khunger, K Malarvizhi, V Ramesh, Avninder Singh
Glomuvenous malformations (GVMs) present as asymptomatic multiple pink-to-blue nodules or plaques. Disseminated lesions are rare, representing 10% of all the cases. Familial cases are caused by mutations in the glomulin gene. A young male presented with multiple bluish-to-dusky red-coloured nodules 10-15 in numbers over the trunk, limbs and buttocks since 12 years of age. They ranged in size from 1 to 3 cm, partially to non-compressible and tender on palpation. There was no history of any systemic complaint...
October 2016: Journal of Cutaneous and Aesthetic Surgery
https://www.readbyqxmd.com/read/28163449/crossing-surgical-borders-where-are-we-where-are-we-going-and-can-we-find-the-way
#11
EDITORIAL
Niti Khunger
No abstract text is available yet for this article.
October 2016: Journal of Cutaneous and Aesthetic Surgery
https://www.readbyqxmd.com/read/28162939/fatigue-behaviour-of-niti-shape-memory-alloy-scaffolds-produced-by-slm-a-unit-cell-design-comparison
#12
M Speirs, B Van Hooreweder, J Van Humbeeck, J-P Kruth
Selective laser melting (SLM) is an additive manufacturing technique able to produce complex functional parts via successively melting layers of metal powder. This process grants the freedom to design highly complex scaffold components to allow bone ingrowth and aid mechanical anchorage. This paper investigates the compression fatigue behaviour of three different unit cells (octahedron, cellular gyroid and sheet gyroid) of SLM nitinol scaffolds. It was found that triply periodic minimal surfaces display superior static mechanical properties in comparison to conventional octahedron beam lattice structures at identical volume fractions...
January 12, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28153346/usefulness-for-predicting-cardiac-events-after-orthotopic-liver-transplantation-of-myocardial-perfusion-imaging-and-dobutamine-stress-echocardiography-preoperatively
#13
David Snipelisky, Jordan Ray, Saraschandra Vallabhajosyula, Gautam Matcha, Samuel Squier, Jacob Lewis, Rex Holliday, Niti Aggarwal, J Wells Askew, Brian Shapiro, Nandan Anavekar
Patients undergoing orthotopic liver transplantation have high rates of cardiac morbidity and mortality. Although guidelines recommend noninvasive stress testing as part of the preoperative evaluation, little data have evaluated clinical outcomes following orthotopic liver transplantation. A retrospective study at 2 high-volume liver transplantation centers was performed. All patients undergoing noninvasive stress testing (myocardial perfusion imaging [MPI] or dobutamine stress echocardiography [DSE]) over a 5-year period were included...
January 6, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28150314/the-upturned-superior-mesenteric-artery-sign-for-first-trimester-detection-of-congenital-diaphragmatic-hernia-and-omphalocele
#14
Ravi Selvaraj Lakshmy, Joy Agnees, Nity Rose
OBJECTIVES: The aim of this study was to follow the course of the superior mesenteric artery (SMA) in first-trimester fetuses to predict the location of the small bowel. Its abnormal course aids in early detection of congenital diaphragmatic hernia (CDH) and assessment of the contents of omphalocele. METHODS: The SMA can be easily identified in a sagittal section of the fetus by using color Doppler sonography at the 11- to 14-week scan, and normally, it has a downward course caudally to supply the intestines...
February 2, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28148697/updating-the-psoriatic-arthritis-psa-core-domain-set-a-report-from-the-psa-workshop-at-omeract-2016
#15
Ana-Maria Orbai, Maarten de Wit, Philip J Mease, Kristina Callis Duffin, Musaab Elmamoun, William Tillett, Willemina Campbell, Oliver FitzGerald, Dafna D Gladman, Niti Goel, Laure Gossec, Pil Hoejgaard, Ying Ying Leung, Chris Lindsay, Vibeke Strand, Désirée M van der Heijde, Bev Shea, Robin Christensen, Laura Coates, Lihi Eder, Neil McHugh, Umut Kalyoncu, Ingrid Steinkoenig, Alexis Ogdie
OBJECTIVE: To include the patient perspective in accordance with the Outcome Measures in Rheumatology (OMERACT) Filter 2.0 in the updated Psoriatic Arthritis (PsA) Core Domain Set for randomized controlled trials (RCT) and longitudinal observational studies (LOS). METHODS: At OMERACT 2016, research conducted to update the PsA Core Domain Set was presented and discussed in breakout groups. The updated PsA Core Domain Set was voted on and endorsed by OMERACT participants...
February 1, 2017: Journal of Rheumatology
https://www.readbyqxmd.com/read/28138999/quantitative-evaluation-of-root-canal-surface-roughness-after-filing-with-adaptive-reciprocating-and-continuous-rotary-instruments
#16
Vahid Sakhaei Manesh, Paul Giacomin, Richard Stoll
Obtaining clean and smooth root canal walls is the ideal clinical outcome of the cleaning and shaping stage in root canal treatment. This study compares the surface roughness of root canal surfaces instrumented with a NiTi filing system with either adaptive reciprocating (AR) or continuous rotation (CR). Root canal cleaning and shaping was carried out on the mesial canals of 24 extracted first molars roots with either AR or CR. Roots were split in half and the surface roughness of their canals was evaluated in 12 three dimensional roughness reconstructions using a scanning electron microscope...
January 31, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/28133265/-endoscopic-stent-placement-to-alleviate-afferent-loop-syndrome-following-recurrence-of-pancreatic-cancer
#17
Masahiro Murakami, Junzo Shimizu, Chikato Koga, Tae Matsumura, Chizu Kameda, Ryohei Kawabata, Masaki Hirota, Masato Yoshikawa, Shingo Noura, Yukihiro Kusumoto, Motohiro Hirao, Masahiko Tsujii, Junichi Hasegawa
We report a case of endoscopic stent placement to alleviate afferent loop syndrome following recurrence of pancreatic cancer. A 73-year-old man who had undergone pancreatic duodenectomy with portal vein resection for pancreatic cancer had developed a local recurrence and was treated with chemotherapy. He developed a high-grade fever and general fatigue, and laboratory data revealed anemia and a high inflammatory reaction; therefore, he was admitted to our hospital. CT scans revealed intestinal stenosis and upper dilatation, known as afferent loop syndrome, caused by the recurrence...
November 2016: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/28132113/a-systematic-analysis-of-controlled-clinical-trials-using-the-niti-car%C3%A2-compression-ring-in-colorectal-anastomoses
#18
REVIEW
R Tabola, R Cirocchi, A Fingerhut, A Arezzo, J Randolph, V Grassi, G A Binda, V D'Andrea, I Abraha, G Popivanov, S Di Saverio, A Zbar
Anastomotic leak following colorectal surgery can be a devastating adverse event. The ideal stapling device should be capable of rapid creation of an anastomosis with serosal apposition without the persistence of a foreign body or a foreign body reaction which potentially contribute to early anastomotic dehiscence or late anastomotic stricture. A systematic review was performed examining available data on controlled randomized and non-randomized trials assessing the NiTi compression anastomosis ring-(NiTi CAR™) (NiTi Solutions, Netanyah Israel) in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) standards...
January 28, 2017: Techniques in Coloproctology
https://www.readbyqxmd.com/read/28127160/incidence-of-apical-crack-initiation-during-canal-preparation-using-hand-stainless-steel-k-file-and-hand-niti-protaper-files
#19
Dileep Soni, Deepak Raisingani, Rachit Mathur, Nidha Madan, Suchita Visnoi
AIM: To evaluate the incidence of apical crack initiation during canal preparation with stainless steel K-files and hand protaper files (in vitro study). MATERIALS AND METHODS: Sixty extracted mandibular premo-lar teeth are randomly selected and embedded in an acrylic tube filled with autopolymerizing resin. A baseline image of the apical surface of each specimen was recorded under a digital microscope (80×). The cervical and middle thirds of all samples were flared with #2 and #1 Gates-Glidden (GG) drills, and a second image was recorded...
October 2016: International Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28125144/evaluation-of-force-released-by-deflection-of-orthodontic-wires-in-conventional-and-self-ligating-brackets
#20
Rodrigo Hitoshi Higa, Nayara Thiago Semenara, José Fernando Castanha Henriques, Guilherme Janson, Renata Sathler, Thais Maria Freire Fernandes
Introduction: The aim of the study was to evaluate deflection forces of rectangular orthodontic wires in conventional (MorelliTM), active (In-Ovation RTM) and passive (Damon 3MXTM) self-ligating brackets. Material and Methods: Two brands of stainless steel and nickel-titanium (NiTi) wires (MorelliTM and GACTM), in addition to OrmcoTM copper-nickel-titanium wires were used. Specimens were assembled in a clinical simulation device especially designed for this study and tested in an Instron universal testing machine...
November 2016: Dental Press Journal of Orthodontics
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