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https://www.readbyqxmd.com/read/28724860/new-approach-to-3d-printing-of-facial-prostheses-using-combination-of-open-source-software-and-conventional-techniques-a-case-report
#1
Nafij B Jamayet, Yap J Abdullah, Zainul A Rajion, Adam Husein, Mohammad K Alam
The wax sculpting of a maxillofacial prosthesis is challenging, time-consuming, and requires great skill. Rapid prototyping (RP) systems allow these hurdles to be overcome by enabling the creation of a customized 3D model of the desired prosthesis. Geomagic and Mimics are the most suitable software programs with which to design such prostheses. However, due to the high cost of these applications and the special training required to operate them, they are not widely used. Additionally, ill-fitting margins and other discrepancies in the final finished products of RP systems are also inevitable...
2017: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/28721994/evaluation-of-marginal-and-internal-gaps-of-metal-ceramic-crowns-obtained-from-conventional-impressions-and-casting-techniques-with-those-obtained-from-digital-techniques
#2
Rathika Rai, S Arun Kumar, R Prabhu, Ranjani Thillai Govindan, Faiz Mohamed Tanveer
BACKGROUND: Accuracy in fit of cast metal restoration has always remained as one of the primary factors in determining the success of the restoration. A well-fitting restoration needs to be accurate both along its margin and with regard to its internal surface. AIM: The aim of the study is to evaluate the marginal fit of metal ceramic crowns obtained by conventional inlay casting wax pattern using conventional impression with the metal ceramic crowns obtained by computer-aided design and computer-aided manufacturing (CAD/CAM) technique using direct and indirect optical scanning...
May 2017: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/28720339/in%C3%A2-vitro-fit-of-cad-cam-complete-arch-screw-retained-titanium-and-zirconia-implant-prostheses-fabricated-on-4-implants
#3
Hadi Al-Meraikhi, Burak Yilmaz, Edwin McGlumphy, William Brantley, William M Johnston
STATEMENT OF PROBLEM: Computer-aided designed and computer-aided manufactured (CAD-CAM) titanium and zirconia implant-supported fixed implant prostheses on 4 implants have become popular. The precision and accuracy of their interface fit has not been widely researched. PURPOSE: The purpose of this in vitro study was to compare the marginal fit of zirconia and titanium implant-supported screw-retained CAD-CAM complete fixed dental prostheses (CFDP) fit with a standardized cast simulating the all-on-4 implant distribution...
July 15, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28716636/a-simplified-clinical-prediction-rule-for-prognosticating-independent-walking-after-spinal-cord-injury-a-prospective-study-from-a-canadian-multicenter-spinal-cord-injury-registry
#4
Katharine E Hicks, Yichen Zhao, Nader Fallah, Carly Rivers, Vanessa Noonan, Tova Plashkes, Eugene K Wai, Darren M Roffey, Eve Tsai, Jerome Paquet, Najmedden Attabib, Travis Marion, Henry Ahn, Philippe Phan
BACKGROUND: Context: Traumatic spinal cord injury (SCI) is a debilitating condition with limited treatment options for neurological or functional recovery. The ability to predict the prognosis of walking post-injury with emerging prediction models could aid in rehabilitation strategies and reintegration into the community. PURPOSE: To re-validate an existing clinical prediction model for independent ambulation (van Middendorp et al. 2011) utilising acute and long-term post-injury follow-up data, and to investigate the accuracy of a simplified model using prospectively collected data from a Canadian multicenter SCI database, the Rick Hansen Spinal Cord Injury Registry (RHSCIR)...
July 14, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28713085/-the-dependence-of-the-marginal-adaptation-of-composite-fillings-in-caries-cavities-of-class-ii-by-black-on-the-state-of-oral-hygiene-and-intensity-of-caries
#5
Елена В Павленкова, Ирина М Ткаченко, Алла И Сидорова, Светлана А Павленко
INTRODUCTION: The problem of treatment of dental caries by fillings in dentistry is the key point in dentistry. Thus the main issue is the long-term functioning of the restorations. Particularly acute, this problem in the reduction of cavities class II according to Black, where the pressure on the filling is sufficiently high. MATERIALS AND METHODS: It was examined and treated 87 patients with different levels of oral hygiene of oral cavity and caries of varying intensity and whom 186 defects of hard tissues of teeth class II Black were fitted...
2017: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28709427/investigation-of-irradiated-volume-in-linac-based-brain-hypo-fractionated-stereotactic-radiotherapy
#6
Mark Ruschin, Arjun Sahgal, Hany Soliman, Sten Myrehaug, May Tsao, Collins Yeboah, Arman Sarfehnia, Brige Chugh, Alex Kiss, Young Lee
BACKGROUND: Emerging techniques such as brain hypo-fractionated radiotherapy (HF-RT) involve complex cases with limited guidelines for plan quality and normal tissue tolerances. The purpose of the present study was to statistically parameterize irradiated volume independently of dose prescription, or margin to determine what spread in achievable irradiated volume one may expect for a given case. METHODS: We defined EXT as the total tissue within the external contour of the patient (including the target) and we defined BMP as the contour of the brain minus PTV...
July 14, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28708013/psychometric-evaluation-of-an-abbreviated-version-of-the-intragroup-marginalization-inventory
#7
Jasmin Llamas, Louisa M Holmes, Nadra E Lisha, Pamela M Ling
Tobacco and marijuana use among U.S. young adults is a top public health concern, and racial/ethnic minorities may be at particular risk. Past research examining cultural variables has focused on the individual in relation to the mainstream U.S. culture; however, an individual can also experience within-group stress, or intragroup marginalization. We used the 2014 San Francisco Bay Area Young Adult Health Survey to validate an abbreviated measure of intragroup marginalization and identify associations between intragroup marginalization and tobacco and marijuana use among ethnic minority young adults (N = 1,058)...
July 14, 2017: Journal of Ethnicity in Substance Abuse
https://www.readbyqxmd.com/read/28704685/dynamic-balance-changes-within-three-weeks-of-fitting-a-new-prosthetic-foot-component
#8
Jenny A Kent, Nicholas Stergiou, Shane R Wurdeman
Balance during walking is of high importance to prosthesis users and may affect walking during baseline observation and evaluation. The aim of this study was to determine whether changes in walking balance occurred during an adaptation period following the fitting of a new prosthetic component. Margin of stability in the medial-lateral direction (MOSML) and an anterior instability margin (AIM) were used to quantify the dynamic balance of 21 unilateral transtibial amputees during overground walking. Participants trialled two prosthetic feet presenting contrasting movement/balance constraints; a Higher Activity foot similar to that of their own prosthesis, and a Lower Activity foot...
July 5, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28689912/influence-of-scanner-powder-application-and-adjustments-on-cad-cam-crown-misfit
#9
Marcel S Prudente, Letícia R Davi, Kemilly O Nabbout, Célio J Prado, Leandro M Pereira, Karla Zancopé, Flávio D Neves
STATEMENT OF PROBLEM: The manufacturers of computer-aided design and computer-aided manufacturing (CAD-CAM) systems emphasize that new technologies can improve the marginal fit of dental crowns. However, data supporting this claim are limited. PURPOSE: The purpose of this in vitro study was to investigate the differences among the following fabrication methods on the marginal discrepancy of dental crowns: intraoral optical scanners, powder application, and adjustments of intaglio surface...
July 7, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28683811/the-prevalence-of-impaired-fasting-glucose-and-undiagnosed-diabetes-mellitus-and-associated-risk-factors-among-adults-living-in-a-rural-koladiba-town-northwest-ethiopia
#10
Abebaw Worede, Shitaye Alemu, Yalemzewod Assefa Gelaw, Molla Abebe
BACKGROUND: Diabetes mellitus is becoming a big public health challenge, particularly in developing countries like Ethiopia. It is a manageable disease if early screening and follow up is made. However, as studies in Ethiopia are limited and unorganized, determining the magnitude of prediabetes and diabetes and identifying associated risk factors is quite essential. METHODS: A community-based, cross-sectional study was conducted from February to April 2015 among adults (aged ≥20 years) in a rural Koladiba town...
July 6, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28678408/longitudinal-regret-after-treatment-for-low-and-intermediate-risk-prostate-cancer
#11
Lauren M Hurwitz, Jennifer Cullen, Daniel J Kim, Sally Elsamanoudi, Jane Hudak, Maryellen Colston, Judith Travis, Huai-Ching Kuo, Kevin R Rice, Christopher R Porter, Inger L Rosner
BACKGROUND: Prostate cancer patients diagnosed with low- and intermediate-risk disease have several treatment options. Decisional regret after treatment is a concern, especially when poor oncologic outcomes or declines in health-related quality of life (HRQoL) occur. This study assessed determinants of longitudinal decisional regret in prostate cancer patients attending a multidisciplinary clinic and treated with radical prostatectomy (RP), external beam radiation therapy (EBRT), brachytherapy (BT), or active surveillance (AS)...
July 5, 2017: Cancer
https://www.readbyqxmd.com/read/28662859/monolithic-zirconia-dental-crowns-internal-fit-margin-quality-fracture-mode-and-load-at-fracture
#12
Christian Schriwer, Anneli Skjold, Nils Roar Gjerdet, Marit Øilo
OBJECTIVE: Dental all-ceramic restorations of zirconia, with and without an aesthetic veneering layer, have become a viable alternative to conventional metal-ceramic restorations. The aim of this study was to evaluate whether factors of the production methods or the material compositions affect load at fracture, fracture modes, internal fit or crown margins of monolithic zirconia crowns. METHODS: Sixty crowns made from six different commercially available dental zirconias were produced to a model tooth with a shallow circumferential chamfer preparation...
June 26, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28644150/rapid-fluorescence-lifetime-estimation-with-modified-phasor-approach-and-laguerre-deconvolution-a-comparative-study
#13
Farzad Fereidouni, Dimitris Gorpas, Dinglong Ma, Hussain Fatakdawala, Laura Marcu
Fluorescence lifetime imaging has been shown to serve as a valuable tool for interrogating and diagnosis of biological tissue at mesoscopic level. The ability to analyze fluorescence decay curves to extract lifetime values in real-time is crucial for clinical translation and applications such as tumor margin delineation or intracoronary imaging of atherosclerotic plaques. In this work, we compare the performance of two popular non-parametric (fit-free) methods for determining lifetime values from fluorescence decays in real-time -Phasor approach and Laguerre deconvolution...
June 23, 2017: Methods and Applications in Fluorescence
https://www.readbyqxmd.com/read/28636616/temnothorax-rugatulus-ant-colonies-consistently-vary-in-nest-structure-across-time-and-context
#14
Nicholas DiRienzo, Anna Dornhaus
A host of animals build architectural constructions. Such constructions frequently vary with environmental and individual/colony conditions, and their architecture directly influences behavior and fitness. The nests of ant colonies drive and enable many of their collective behaviors, and as such are part of their 'extended phenotype'. Since ant colonies have been recently shown to differ in behavior and life history strategy, we ask whether colonies differ in another trait: the architecture of the constructions they create...
2017: PloS One
https://www.readbyqxmd.com/read/28630034/fall-prevention-self-assessments-via-mobile-3d-visualization-technologies-community-dwelling-older-adults-perceptions-of-opportunities-and-challenges
#15
Julian Hamm, Arthur Money, Anita Atwal
BACKGROUND: In the field of occupational therapy, the assistive equipment provision process (AEPP) is a prominent preventive strategy used to promote independent living and to identify and alleviate fall risk factors via the provision of assistive equipment within the home environment. Current practice involves the use of paper-based forms that include 2D measurement guidance diagrams that aim to communicate the precise points and dimensions that must be measured in order to make AEPP assessments...
June 19, 2017: JMIR Human Factors
https://www.readbyqxmd.com/read/28626864/detecting-genetic-association-through-shortest-paths-in-a-bidirected-graph
#16
Masao Ueki, Yoshinori Kawasaki, Gen Tamiya
Genome-wide association studies (GWASs) commonly use marginal association tests for each single-nucleotide polymorphism (SNP). Because these tests treat SNPs as independent, their power will be suboptimal for detecting SNPs hidden by linkage disequilibrium (LD). One way to improve power is to use a multiple regression model. However, the large number of SNPs preclude simultaneous fitting with multiple regression, and subset regression is infeasible because of an exorbitant number of candidate subsets. We therefore propose a new method for detecting hidden SNPs having significant yet weak marginal association in a multiple regression model...
June 19, 2017: Genetic Epidemiology
https://www.readbyqxmd.com/read/28624240/bipolar-bone-loss-in-patients-with-anterior-shoulder-dislocation-a-comparison-of-adolescents-versus-adult-patients
#17
Brian C Lau, Devin Conway, Patrick F Curran, Brian T Feeley, Nirav K Pandya
PURPOSE: To compare bipolar bone loss by evaluating the degree of glenoid bone loss, Hill-Sachs lesion size, and glenoid track in adolescents and adults with shoulder dislocations. METHODS: We performed a retrospective review between 2012 and 2016 of surgical and nonsurgical patients with a history of anterior shoulder dislocations (primary or recurrent) who underwent magnetic resonance imaging of the affected shoulder. The exclusion criteria included multidirectional instability, prior surgery, and posterior dislocation...
June 14, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28608435/cad-cam-fabricated-ceramic-implant-supported-single-crowns-made-from-lithium-disilicate-final-results-of-a-5-year-prospective-cohort-study
#18
Benedikt Christopher Spies, Stefano Pieralli, Kirstin Vach, Ralf-Joachim Kohal
BACKGROUND: All-ceramic bilayer systems suffer from technique-sensitivity, resulting in increased technical complication rates. This might be overcome by monolithic reconstructions, facilitating digital workflows. PURPOSE: To evaluate the clinical and patient-reported outcome of CAD/CAM-fabricated implant-supported single crowns (ISCs) made of lithium disilicate (LS2 ) cemented on ceramic implants 5 years after implant installation. MATERIALS AND METHODS: Twenty-four patients were included in the study...
June 13, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28607349/knee-symptomatic-osteoarthritis-walking-disability-nsaids-use-and-all-cause-mortality-population-based-wuchuan-osteoarthritis-study
#19
Qiang Liu, Jingbo Niu, Hu Li, Yan Ke, Rujun Li, Yuqing Zhang, Jianhao Lin
Knee symptomatic osteoarthritis (SxOA) was associated with all-cause mortality. Walking disability and NSAIDs use have been postulated as potential mechanisms linking knee SxOA to all-cause mortality. Data were collected on ability of walking for 1 kilometer and use of NSAIDs at baseline and death information at follow-up. Subjects with knee SxOA were identified if at least one knee had both radiographic OA and pain. We first fitted a Cox proportional hazards model to examine the relation of knee SxOA to the risk of all-cause mortality...
June 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28606137/male-benefit-sexually-antagonistic-genotypes-show-elevated-vulnerability-to-inbreeding
#20
Karl Grieshop, David Berger, Göran Arnqvist
BACKGROUND: There is theoretical and empirical evidence for strong sexual selection in males having positive effects on population viability by serving to purify the genome of its mutation load at a low demographic cost. However, there is also theoretical and empirical evidence for negative effects of sexual selection on female fitness, and therefore population viability, known as the gender load. This can take the form of sexually antagonistic (SA) genetic variation where alleles with a selective advantage in males pose a detriment to female fitness, and vice versa...
June 12, 2017: BMC Evolutionary Biology
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