keyword
MENU ▼
Read by QxMD icon Read
search

stereomicroscope

keyword
https://www.readbyqxmd.com/read/28427837/in-vitro-fatigue-tests-and-in-silico-finite-element-analysis-of-dental-implants-with-different-fixture-abutment-joint-types-using-computer-aided-design-models
#1
Satoshi Yamaguchi, Yasufumi Yamanishi, Lucas S Machado, Shuji Matsumoto, Nick Tovar, Paulo G Coelho, Van P Thompson, Satoshi Imazato
PURPOSE: The aim of this study was to evaluate fatigue resistance of dental fixtures with two different fixture-abutment connections by in vitro fatigue testing and in silico three-dimensional finite element analysis (3D FEA) using original computer-aided design (CAD) models. METHODS: Dental implant fixtures with external connection (EX) or internal connection (IN) abutments were fabricated from original CAD models using grade IV titanium and step-stress accelerated life testing was performed...
April 17, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28424734/influence-of-teeth-preparation-finishing-on-the-adaptation-of-lithium-disilicate-crowns
#2
Bruna Salamoni Sinhori, Mauro Amaral Caldeira de Andrada, Guilherme Carpena Lopes, Sylvio Monteiro Junior, Luiz Narciso Baratieri
The polishing step of teeth preparations for crowns is a step often performed, so that there is an increased time during the clinical procedure. The aim of this study is to evaluate the marginal and internal adaptation of all-ceramic CAD/CAM lithium disilicate crowns in polished preparations for crown and nonpolished preparations for crowns. For this purpose, 20 first molars were selected, which were divided into two groups (n = 10) G1, teeth that received surface roughening similar to preparation without polishing, and G2 (control), polished preparations...
2017: International Journal of Biomaterials
https://www.readbyqxmd.com/read/28422602/does-bonding-approach-influence-the-bond-strength-of-universal-adhesive-to-dentin-of-primary-teeth
#3
Tathiane Larissa Lenzi, Fabio Zovico Maxnuck Soares, Rachel de Oliveira Rocha
OBJECTIVE: To evaluate the effect of bonding strategy on microtensile bond strength (μTBS) of a new universal adhesive system to primary tooth dentin. STUDY DESIGN: Flat dentin surfaces from 25 primary molars were assigned to 5 groups according to the adhesive and bonding approach: Adper Single Bond 2 (two-step etch-and-rinse adhesive) and Clearfil SE Bond (two-step self-etch system), as controls; Scotchbond Universal Adhesive-self-etch, dry or wet-bonding etch-and-rinse strategies...
2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28422367/microtensile-bond-strength-of-a-resin-cement-to-silica-based-and-y-tzp-ceramics-using-different-surface-treatments
#4
Alireza Keshvad, Seyed Mohammad Reza Hakimaneh
PURPOSE: To evaluate the effects of different surface treatments on the microtensile bond strength (μTBS) of bonding between resin cement and lithia or zirconia-based ceramics using an in vitro study. MATERIALS AND METHODS: Three zirconia ceramic blocks (IPS e.max ZirCAD) and three lithium disilicate ceramic blocks (IPS e.max CAD) were sintered and duplicated in resin composite. The zirconia specimens underwent various treatments (n = 1): (i) Sandblast + primer (ZiSa); (ii) sandblast + laser irradiation + primer (ZiSaLa); or (iii) laser irradiation + primer (ZiLa)...
April 19, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28417909/interactions-among-the-predatory-midge-aphidoletes-aphidimyza-diptera-cecidomyiidae-the-fungal-pathogen-metarhizium-brunneum-ascomycota-hypocreales-and-maize-infesting-aphids-in-greenhouse-mesocosms
#5
Ana Gorete Campos de Azevedo, Bernhardt Michael Steinwender, Jørgen Eilenberg, Lene Sigsgaard
The generalist entomopathogenic fungus, Metarhizium brunneum, has proved to have great potential as a versatile biological pest control agent. The gall midge Aphidoletes aphidimyza is a specialist predator that occurs naturally in Europe and has been successfully used for aphid suppression. However, the interaction between these two biological control organisms and how it may affect the biological control of aphids awaits further investigation. As part of the EU-supported project INBIOSOIL, this study was conducted in greenhouse conditions to assess the possible effects of combining both biological control agents...
April 12, 2017: Insects
https://www.readbyqxmd.com/read/28413594/the-effect-of-repeated-preheating-of-dimethacrylate-and-silorane-based-composite-resins-on-marginal-gap-of-class-v-restorations
#6
Parnian Alizadeh Oskoee, Fatemeh Pournaghi Azar, Elmira Jafari Navimipour, Mohammad Esmaeel Ebrahimi Chaharom, Fereshteh Naser Alavi, Ashkan Salari
Background. One of the problems with composite resin restorations is gap formation at resin‒tooth interface. The present study evaluated the effect of preheating cycles of silorane- and dimethacrylate-based composite resins on gap formation at the gingival margins of Class V restorations. Methods. In this in vitro study, standard Class V cavities were prepared on the buccal surfaces of 48 bovine incisors. For restorative procedure, the samples were randomly divided into 2 groups based on the type of composite resin (group 1: di-methacrylate composite [Filtek Z250]; group 2: silorane composite [Filtek P90]) and each group was randomly divided into 2 subgroups based on the composite temperature (A: room temperature; B: after 40 preheating cycles up to 55°C)...
2017: Journal of Dental Research, Dental Clinics, Dental Prospects
https://www.readbyqxmd.com/read/28409577/-stereo-microscope-neglected-tool
#7
Grzegorz Gacek
Stereoscopes, in author opinion, are neglected tools in modern biology. This article shortly describes technical and application capabilities of the present stereomicroscopes. The two main types of stereomicroscope construction are depicted: Greenough microscope and Common Main Objective microscope. The technological breakthrough, asymmetrical optical design of stereomicroscopes, the Fusion Optics, is presented too. Because of very wide offer of a stereomicroscope platforms, illumination systems, software and imaging systems, the article contains also very useful factors to consider when selecting a stereomicroscope...
2017: Postepy Biochemii
https://www.readbyqxmd.com/read/28401681/effect-of-dentin-pretreatment-with-potassium-oxalate-a-6-year-follow-up
#8
Isabel Cristina Celerino de Moraes Porto, Joatan Lucas de Sousa Gomes Costa, Marcio Rafael Nascimento da Silva Lopes, Johnnatan Duarte de Freitas, Isabelle Lins Macêdo de Oliveira, Gabriela Queiroz de Melo Monteiro, Marcos Antônio Japiassú Resende Montes
Oxalate-based products are effective against dentine sensitivity and have been studied as an option to improve long-term adhesive bonding strength. Our aim was to evaluate the effect of potassium oxalate on the microtensile bond strength (µTBS) of the dentin/resin interface after 24 h, 1, and 6 years. Dentin on the occlusal surface of 16 human premolars was exposed and etched with 35% phosphoric acid. The teeth were divided into four groups. Two groups received 3% monohydrated potassium oxalate and the following adhesive systems and composites: Adper Scotchbond Multipurpose + FiltekZ350 (3M/ESPE) and Prime & Bond NT + Esthet-X (Dentsply)...
April 12, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/28398151/assessing-bone-type-of-implant-recipient-sites-by-stereomicroscopic-observation-of-bone-core-specimens-a-comparison-with-the-assessment-using-dental-radiography
#9
Min-Wen Fu, E-Chin Shen, Earl Fu, Fu-Gong Lin, Tian-You Wang, Hsien-Chung Chiu
BACKGROUND: We aimed to determine if bone quality evaluation of surgically obtained bone core specimens using a stereomicroscope is reliable for determining bone quality at implant recipient sites. METHODS: Bone quality was pre-surgically assessed in 122 edentulous ridges obtained from 62 patients using periapical radiographs and categorized according to the Lekholm and Zarb classification. During surgery, bone specimens were trephined, and bone types were immediately classified using a stereomicroscope...
March 10, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28395187/surface-imaging-of-the-filamentous-fungus-penicillium-simplicissimum-growing-in-a-solid-state-fermentation-system
#10
Fernando Pereira de Almeida, Denise Maria Guimarães Freire, Ulysses Lins, Melissa Limoeiro Estrada Gutarra
A comparative study on the lipase-producing fungus Penicillium simplissicimum, grown on a tray type solid-state fermentation (SSF) bioreactor, was performed using stereoscopy, focus Z-stacking stereoscopic images, field emission scanning electron microscopy (FE-SEM) and environmental scanning electron microscopy (ESEM) to better characterize the morphology of filamentous fungi in SSF and their distribution over the solid matrix. The imaging of live fungal samples using a stereomicroscope with focus Z-stacking showed differences in colonization between a static SSF and an intermittent agitated SSF...
April 5, 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/28392818/comparison-of-push-out-bond-strength-of-two-bulk-fill-and-one-conventional-composite-to-intracanal-dentin-in-severely-damaged-primary-anterior-teeth
#11
Shahram Mosharrafian, Zeynab Sharifi
OBJECTIVES: This study sought to compare the push-out bond strength of two bulk-fill and one conventional composite to intracanal dentin in primary anterior teeth. MATERIALS AND METHODS: This in vitro, experimental study was conducted on 39 primary anterior teeth, which were randomly divided into three groups. After cleaning and shaping, the root canals were filled with Metapex in such a way that after the application of 1mm light-cure liner on top of it, the coronal 3mm of the canal remained empty for composite post space...
June 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28392716/er-yag-pre-treatment-for-bonding-of-orthodontic-bracket-1-year-of-in-vitro-treatment
#12
Rudys Rodolfo de Jesus Tavarez, Gisele Lima Bezerra, Karla Janilee de Souza Penha, Carlos Rocha Gomes Torres, Leily Macedo Firoozmand
OBJECTIVE: The aim of this study was to evaluate in vitro bond strength of metal brackets bonded with: total etch, total etch with erbium: yttrium aluminum garnet laser (Er:YAG) and self-etching adhesive systems, submitted to thermal-mechanical cycling, simulating 1 year of orthodontic treatment. MATERIALS AND METHODS: For the study, 80 bovine incisors were randomly divided into 3 experimental groups (n=16 each): XT- acid etching + Transbond XT, XT/Er:YAG- Transbond XT associated with Er:YAG laser irradiation (λ=2...
2017: Clinical, Cosmetic and Investigational Dentistry
https://www.readbyqxmd.com/read/28389024/accuracy-of-a-digital-removable-partial-denture-fabricated-by-casting-a-rapid-prototyped-pattern-a-clinical-study
#13
Jong-Won Lee, Ji-Man Park, Eun-Jin Park, Seong-Joo Heo, Jai-Young Koak, Seong-Kyun Kim
STATEMENT OF PROBLEM: A limited number of clinical studies have evaluated the accuracy of a digitally generated removable partial denture (RPD) intraorally. An analysis of the accuracy of the digital RPD on a larger number of participants was needed. PURPOSE: The purpose of this clinical study was to analyze the accuracy of digital RPDs by using the replica technique. MATERIAL AND METHODS: The fit accuracy of digital RPDs fabricated using electronic surveying was analyzed by fabricating replicas with silicone registration material and measuring with a stereomicroscope and image program...
April 4, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28385437/effect-of-prior-silane-application-on-the-bond-strength-of-a-universal-adhesive-to-a-lithium-disilicate-ceramic
#14
André Fábio Vasconcelos Moro, Amanda Barreto Ramos, Gustavo Miranda Rocha, Cesar Dos Reis Perez
STATEMENT OF PROBLEM: Universal adhesives combine silane and various monomers in a single bottle to make them more versatile. Their adhesive performance is unclear. PURPOSE: The purpose of this in vitro study was to assess the effects of an additional silane application before using a universal adhesive on the adhesion between a disilicate glass ceramic and a composite resin by using a microshear bond strength test (μSBS) and fracture analysis immediately and after thermocycling...
April 3, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28385435/effect-of-repeated-ceramic-firings-on-the-marginal-and-internal-adaptation-of-metal-ceramic-restorations-fabricated-with-different-cad-cam-technologies
#15
Hasan Kocaağaoğlu, Haydar Albayrak, Halil Ibrahim Kilinc, Hasan Önder Gümüs
STATEMENT OF PROBLEM: The use of computer-aided design and computer-aided manufacturing (CAD-CAM) for metal ceramic restorations has increased with advances in the technology. However, little is known about the marginal and internal adaptation of restorations fabricated using laser sintering (LS) and soft milling (SM). Moreover, the effects of repeated ceramic firings on the marginal and internal adaptation of metal ceramic restorations fabricated with LS and SM is also unknown. PURPOSE: The purpose of this in vitro study was to investigate the effects of repeated ceramic firings on the marginal and internal adaptation of metal ceramic copings fabricated using the lost wax (LW), LS, and SM techniques...
April 3, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28384974/a-comparative-study-of-the-quality-of-apical-seal-in-resilon-epiphany-se-following-intra-canal-irrigation-with-17-edta-10-citric-acid-and-mtad-as-final-irrigants-a-dye-leakage-study-under-vacuum
#16
Saravana Karthikeyan Balasubramanian, Vidya Saraswathi, Nidambur Vasudev Ballal, Shashi Rashmi Acharya, J Sivakumar Sampath, Sandeep Singh
INTRODUCTION: Adequate apical sealing ability of the root canal filling material is an essential requisite for a successful endodontic therapy. Various endodontic irrigants are used for the removal of smear layer before obturating with a solid core material, thereby, reducing microleakage and improving apical seal. Resilon, a synthetic material was developed as an alternative to replace the conventional gutta-percha (standard root canal filling material) and traditional sealers for the obturation of endodontically treated teeth...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28379998/safety-aspects-of-atmospheric-pressure-helium-plasma-jet-operation-on-skin-in-vivo-study-on-mouse-skin
#17
Spela Kos, Tanja Blagus, Maja Cemazar, Gregor Filipic, Gregor Sersa, Uros Cvelbar
Biomedical applications of plasma require its efficacy for specific purposes and equally importantly its safety. Herein the safety aspects of cold plasma created with simple atmospheric pressure plasma jet produced with helium gas and electrode discharge are evaluated in skin damage on mouse, at different duration of exposure and gas flow rates. The extent of skin damage and treatments are systematically evaluated using stereomicroscope, labelling with fluorescent dyes, histology, infrared imaging and optical emission spectroscopy...
2017: PloS One
https://www.readbyqxmd.com/read/28377645/comparative-evaluation-of-bond-strength-and-microleakage-of-standard-and-expired-composite-at-resin-dentin-interface-an-in-vitro-study
#18
Nidhi Talreja, Shilpy Singla, N D Shashikiran
BACKGROUND: Evaluation of bond strength and microleakage caused by polymerization shrinkage provides a screening mechanism and an indication of the potential for the clinical success of composite restorations. AIM: The aim of this study was to determine the effect on shear bond strength and microleakage of standard and expired composites. MATERIALS AND METHODS: Selected specimens were etched using 37% phosphoric acid for 15 seconds and were randomly divided into four groups...
January 2017: International Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28339713/evaluation-of-the-effectiveness-of-intermittent-mechanical-pressure-with-short-loading-duration-new-type-of-intermittent-force-for-orthodontic-treatment
#19
Kento Shoman, Yoshiaki Sato, Eisuke Nishikawa, Yuusuke Kudo, Takaaki Yamamoto, Junichiro Iida
Background: Since it is difficult to precisely control the magnitude of force in orthodontic practice, controlling the duration of force is expected to prevent tissue damage. The use of an actuator as an appliance for intermittent force application is a possible solution for controlling the duration. However, effectiveness of an actuator for controlling the duration is still not clear. Aim: To determine whether a short loading duration of intermittent force has the potential to maintain a sound condition of the capillaries and induce dilation of capillaries, which is a requisite phenomenon for orthodontic tooth movement...
February 22, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28322211/prey-species-of-franciscana-pontoporia-blainvillei-as-paratenic-hosts-of-helminths
#20
Tony Silveira, Mariana H Remião, Ricardo B Robaldo, Kaio Freitas, Ana Luísa S Valente
The distribution of franciscana Pontoporia blainvillei Gervais & d'Orbigny, 1884, is restricted to the estuarine and coastal waters of the southwestern Atlantic. The diet of this dolphin is composed of fishes, squids, and shrimps, many of which harbor helminths that may infect franciscana. Larval forms of the trematode Synthesium pontoporiae and the acanthocephalan Bolbosoma turbinella have been recorded in franciscana; however, they have not yet been identified in any of the prey species of this cetacean. We evaluated 3 components of the diet of franciscana as possible transmission sources of parasitiasis...
March 21, 2017: Diseases of Aquatic Organisms
keyword
keyword
34113
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"