keyword
MENU ▼
Read by QxMD icon Read
search

ename

keyword
https://www.readbyqxmd.com/read/29678328/chairside-cad-cam-materials-part-3-cyclic-fatigue-parameters-and-lifetime-predictions
#1
Michael Wendler, Renan Belli, Diana Valladares, Anselm Petschelt, Ulrich Lohbauer
OBJECTIVES: Chemical and mechanical degradation play a key role on the lifetime of dental restorative materials. Therefore, prediction of their long-term performance in the oral environment should base on fatigue, rather than inert strength data, as commonly observed in the dental material's field. The objective of the present study was to provide mechanistic fatigue parameters of current dental CAD/CAM materials under cyclic biaxial flexure and assess their suitability in predicting clinical fracture behaviors...
April 17, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29661579/effect-of-acid-etching-on-tridimensional-microstructure-of-etchable-cad-cam-materials
#2
Fabián Murillo-Gómez, Regina Guenka Palma-Dibb, Mario Fernando De Goes
OBJECTIVE: Evaluate if etching protocols affect superficial/internal microstructural integrity of CAD/CAM ceramic materials. METHODS: Sixty blocks (3×3×3mm) of IPS/Empress-LEU, IPS/e.max-LDC (Ivoclar-Vivadent) and Enamic-PIC (VITA) were used. Lateral surfaces from each block were isolated with Teflon strip and petroleum jelly to keep them untouched. Specimens were distributed into 6 groups (n=10): 1. no treatment (C); 2. hydrofluoric acid (HF) 5%, 20s (HF5%20s); 3...
April 13, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29593332/the-importance-of-a-potential-phosphorylation-site-in-enamelin-on-enamel-formation
#3
Wen-Juan Yan, Pan Ma, Ye Tian, Jing-Ya Wang, Chun-Lin Qin, Jian Q Feng, Xiao-Fang Wang
Enamelin (ENAM) has three putative phosphoserines (pSers) phosphorylated by a Golgi-associated secretory pathway kinase (FAM20C) based on their distinctive Ser-x-Glu (S-x-E) motifs. Fam20C-knockout mice show severe enamel defects similar to those in the Enam-knockout mice, implying an important role of the pSers in ENAM. To determine the role of pSer55 in ENAM, we characterized ENAMRgsc514 mice, in which Ser55 cannot be phosphorylated by FAM20C due to an E57 >G57 mutation in the S-x-E motif. The enamel microstructure of 4-week-old mice was examined by scanning electron microscopy...
November 29, 2017: International Journal of Oral Science
https://www.readbyqxmd.com/read/29554435/hypoplastic-ai-with-highly-variable-expressivity-caused-by-enam-mutations
#4
M Koruyucu, J Kang, Y J Kim, F Seymen, Y Kasimoglu, Z H Lee, T J Shin, H K Hyun, Y J Kim, S H Lee, J C C Hu, J P Simmer, J W Kim
Tooth enamel, the hardest tissue in the human body, is formed after a complex series of interactions between dental epithelial tissue and the underlying ectomesenchyme. Nonsyndromic amelogenesis imperfecta (AI) is a rare genetic disorder affecting tooth enamel without other nonoral symptoms. In this study, we identified 2 novel ENAM mutations in 2 families with hypoplastic AI by whole exome sequencing. Family 1 had a heterozygous splicing donor site mutation in intron 4, NM_031889; c.123+2T>G. Affected individuals had hypoplastic enamel with or without the characteristic horizontal hypoplastic grooves in some teeth...
March 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29534712/effect-of-surface-finishing-on-the-colour-stability-and-translucency-of-dental-ceramics
#5
Işıl Sarıkaya, Kaan Yerliyurt, Yeliz Hayran
BACKGROUND: The purpose of this study was to investigate the effects of staining solutions and surface finishing on the colour stability and translucency of hybrid ceramic (HC) and resin nanoceramic (RNC) materials. METHODS: Twenty four groups consisting of 10 specimens (240 specimens in total) were created out of HC and RNC, including six groups to be stored in distilled water served as the controls groups. The Vita Enamic technical set, Shofu polishers, medium and fine rubber wheels and Sof-Lex polishing discs were used as polishing instruments...
March 13, 2018: BMC Oral Health
https://www.readbyqxmd.com/read/29519990/-in-vitro-fracture-strength-and-hardness-of-different-computer-aided-design-computer-aided-manufacturing-inlays
#6
O Sagsoz, M Yildiz, A S L Hojjat Ghahramanzadeh, A Alsaran
Objective: The purpose of this study was to examine the fracture strength and surface microhardness of computer-aided design/computer-aided manufacturing (CAD/CAM) materials in vitro. Materials and Methods: Mesial-occlusal-distal inlays were made from five different CAD/CAM materials (feldspathic ceramic, CEREC blocs; leucite-reinforced ceramic, IPS Empress CAD; resin nano ceramic, 3M ESPE Lava Ultimate; hybrid ceramic, VITA Enamic; and lithium disilicate ceramic, IPS e...
March 2018: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/29513638/effect-of-different-computer-aided-design-computer-aided-manufacturing-cad-cam-materials-and-thicknesses-on-the-fracture-resistance-of-occlusal-veneers
#7
J P Andrade, D Stona, H R Bittencourt, G A Borges, L H Burnett, A M Spohr
The aim was to evaluate, in vitro, the influence of different computer-aided design/computer-aided manufacturing (CAD/CAM) materials (IPS e.max CAD, Vita Enamic, and Lava Ultimate) and thicknesses (0.6 mm and 1.5 mm) on the fracture resistance of occlusal veneers. Sixty human third molars were prepared to simulate advanced erosion of the occlusal surface, and the teeth were randomly divided into six experimental groups (n=10) according to the material and thickness used to build the veneers. Ten sound teeth formed the control group...
March 7, 2018: Operative Dentistry
https://www.readbyqxmd.com/read/29503714/the-effect-of-glazing-and-aging-on-the-surface-properties-of-cad-cam-resin-blocks
#8
Neslihan Tekçe, Sinan Fidan, Safa Tuncer, Dilan Kara, Mustafa Demirci
PURPOSE: To investigate the effect of accelerated aging on surface properties of glazed CAD/CAM resin blocks using a 2D surface profilometer and a 3D non-contact optical profilometer. MATERIALS AND METHODS: Three types of CAD/CAM resin restorative materials, LAVA Ultimate (3M ESPE, St Paul, MN, USA), VITA Enamic (Vita Zahnfabrik H. Rauter, Bad Säckingen, Germany), and Cerasmart (GC Corparation, Tokyo, Japan) were used for this study. CAD/CAM blocks were cut in 3-mm thickness slabs and divided into three groups; Group 1: control group (specimens polished with 600 grit SCI paper); Group 2: specimens sandblasted, silanized, and glazed with Optiglaze Color (GC); Group 3: glazed specimens subjected to 5000 thermocycles (n=15)...
February 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29503712/comparative-color-and-surface-parameters-of-current-esthetic-restorative-cad-cam-materials
#9
Ferhan Egilmez, Gulfem Ergun, Isil Cekic-Nagas, Pekka Kalevi Vallittu, Lippo Veli Juhana Lassila
PURPOSE: The purpose of this study was to derive and compare the inherent color (hue angle, chroma), translucency (TPSCI ), surface gloss (ΔE* SCE-SCI ), and surface roughness (Ra ) amongst selected shades and brands of three hybrid CAD/CAM blocks [GC Cerasmart (CS); Lava Ultimate (LU); Vita Enamic (VE)]. MATERIALS AND METHODS: The specimens (N = 225) were prepared into square-shaped (12 × 12 mm2 ) with different thicknesses and shades. The measurements of color, translucency, and surface gloss were performed by a reflection spectrophotometer...
February 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29492264/the-importance-of-evolutionary-medicine-in-developing-countries-a-case-for-pakistan-s-medical-schools
#10
REVIEW
Syed Faaiz Enam, Shumaila Hashmi
Evolutionary Medicine (EM) is a fundamental science exploring why our bodies are plagued with disease and hindered by limitations. EM views the body as an assortment of benefits, mistakes, and compromises molded over millennia. It highlights the role of evolution in numerous diseases encountered in community and family medicine clinics of developing countries. It enables us to ask informed questions and develop novel responses to global health problems. An understanding of the field is thus crucial for budding doctors, but its study is currently limited to a handful of medical schools in high-income countries...
2018: Evolution, Medicine, and Public Health
https://www.readbyqxmd.com/read/29492178/the-micromorphological-research-of-the-internal-structure-of-chairside-cad-cam-materials-by-the-method-of-scanning-impulse-acoustic-microscopy-siam
#11
Kristina E Goryainova, Egor S Morokov, Marina V Retinskaja, Fedor S Rusanov, Samvel V Apresyan, Igor Yu Lebedenko
Aim: The aim of the present work was to compare the elastic properties and internal structure of 4 different CAD/CAM chairside materials, by the method of Scanning Impulse Acoustic Microscopy (SIAM). Methods: Four chairside CAD/CAM materials with different structures from hybrid ceramic (VITA Enamic, VITA Zahnfabrik), feldspatic ceramic (VITABlocs Mark II, VITA Zahnfabrik), leucite glass-ceramic (IPS Empress CAD, Ivoclar Vivadent) and PMMA (Telio CAD, Ivoclar Vivadent) were examined by Scanning Impulse Acoustic Microscope (SIAM)...
2018: Open Dentistry Journal
https://www.readbyqxmd.com/read/29492071/flipped-classroom-instructional-approach-in-undergraduate-medical-education
#12
Syeda Sadia Fatima, Fazal Manzoor Arain, Syed Ather Enam
Objective: In this study we implemented the "flipped classroom" model to enhance active learning in medical students taking neurosciences module at Aga Khan University, Karachi. Methods: Ninety eight undergraduate medical students participated in this study. The study was conducted from January till March 2017. Study material was provided to students in form of video lecture and reading material for the non-face to face sitting, while face to face time was spent on activities such as case solving, group discussions, and quizzes to consolidate learning under the supervision of faculty...
November 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/29462741/synchrotron-based-x-ray-fluorescence-study-of-gold-nanorods-and-skin-elements-distribution-into-excised-human-skin-layers
#13
Nouf N Mahmoud, Messaoud Harfouche, Alaaldin M Alkilany, Amal G Al-Bakri, Rania A El-Qirem, Sawsan A Shraim, Enam A Khalil
Understanding the distribution of nanoparticles in skin layers is fundamentally important and essential for developing nanoparticle-based dermal drug delivery systems. In the present study, we provide insights into the distribution of gold nanorods (GNRs) functionalized with hydrophobic or hydrophilic ligands in human skin layers using synchrotron X-ray fluorescence (SR-XRF) spectroscopy, confocal microscopy, and transmission electron microscopy. The results confirmed the important role that the surface chemistry of GNRs plays in their penetration into the skin; the GNRs coated with polyethylene glycol were distributed into the skin layers to a greater extent than the GNRs coated with hydrophobic polystyrene thiol...
February 12, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29422470/influences-of-light-emitting-diode-illumination-bleaching-technique-on-nanohardness-of-computer-aided-design-and-computer-aided-manufacturing-ceramic-restorative-materials
#14
Niwut Juntavee, Apa Juntavee, Phuwiwat Saensutthawijit
AIM: This study evaluated the effect of light-emitting diode (LED) illumination bleaching technique on the surface nanohardness of various computer-aided design and computer-aided manufacturing (CAD/CAM) ceramic materials. MATERIALS AND METHODS: Twenty disk-shaped samples (width, length, and thickness = 10, 15, and 2 mm) were prepared from each of the ceramic materials for CAD/CAM, including Lava™ Ultimate (LV), Vita Enamic® (En) IPS e.max® CAD (Me), inCoris® TZI (IC), and Prettau® zirconia (Pr)...
February 1, 2018: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29405385/specificity-protein-7-is-required-for-proliferation-and-differentiation-of-ameloblasts-and-odontoblasts
#15
Ji-Myung Bae, John C Clarke, Harunur Rashid, Mitra D Adhami, Kayla McCullough, Jordan S Scott, Haiyan Chen, Krishna M Sinha, Benoit de Crombrugghe, Amjad Javed
The Sp7/Osterix transcription factor is essential for bone development. Mutations of the Sp7 gene in humans are associated with craniofacial anomalies and osteogenesis imperfecta. However, the role of Sp7 in embryonic tooth development remains unknown. Here we identified the functional requirement of Sp7 for dentin synthesis and tooth development. Sp7-null mice exhibit craniofacial dysmorphogenesis and are completely void of alveolar bone. Surprisingly, initial tooth morphogenesis progressed normally in Sp7-null mice...
February 5, 2018: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29404810/roughness-surface-energy-and-superficial-damages-of-cad-cam-materials-after-surface-treatment
#16
Thomas Strasser, Verena Preis, Michael Behr, Martin Rosentritt
OBJECTIVES: The aim of this study was to examine the effects of surface pre-treatment on CAD/CAM materials including ceramics, zirconia, resin-infiltrated ceramic, and resin-based composite. MATERIALS AND METHODS: Specimens were made of ten CAD/CAM materials (Celtra Duo, Degudent, D; Vita Suprinity, Vita, D; E.max CAD, Ivoclar-Vivadent, FL; E.max ZirCAD, Ivoclar-Vivadent, FL; Vita Enamic, Vita, D; Cerasmart, GC, B; LAVA Ultimate, 3M, D; SHOFU Block HC, SHOFU, US; Grandio Blocs, VOCO, D; BRILLIANT Crios, Coltene, CH) and pretreated to represent clinical procedures (Hf 20 s/5%; phosphoric acid 20 s/37%; Monobond etch and prime (Ivoclar-Vivadent, FL); water-cooled diamond bur (80 μm; 4 μm); Al2O3-blasting (50 μm/1 bar, 50 μm/2 bar, 120 μm/1 bar, 120 μm/2 bar); untreated; manufacturer's instructions)...
February 5, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29341474/effect-of-staining-beverages-on-color-and-translucency-of-cad-cam-composites
#17
S H Q Quek, A U J Yap, V Rosa, K B C Tan, K H Teoh
This study investigated the color (ΔE) and translucency changes (ΔTP) of CAD/CAM composites after exposure to staining solutions using both spectrophotometer and shade-matching device. Direct (Filtek Z350XT [ZT]), indirect (Shofu Ceramage [CE]) and CAD/CAM (Shofu HC Block [HC], Lava Ultimate [LU], Vita Enamic [EN]) composite specimens measuring 12 × 14 × 1.5 mm were fabricated, divided into five groups (n = 8), and immersed in cola, tea, coffee, red wine, distilled water (control) at 37°C for 7 days...
January 17, 2018: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/29323782/the-effect-of-surface-treatments-on-the-mechanical-and-optical-behaviors-of-cad-cam-restorative-materials
#18
Sevcan Kurtulmus-Yilmaz, Esra Cengiz, Salim Ongun, Izgen Karakaya
PURPOSE: To evaluate the effect of different surface treatments on mechanical and optical properties of lithium disilicate ceramic (IPS e.max CAD), 2 resin nanoceramics (Lava Ultimate, GC Cerasmart), and polymer-infiltrated ceramic network material (Vita Enamic). MATERIALS AND METHODS: CAD/CAM blocks were sectioned into 4 × 1 × 14 mm3 bars for three-point bending test and 1 × 8 × 8 mm3 square specimens were obtained for color and translucency measurements. Bar-shaped and square specimens were divided into five groups according to the surface treatment method as: control (no treatment), hydrofluoric acid etching, airborne-particle abrasion, 2 W and 3 W Er,Cr:YSGG laser irradiation (n = 10)...
January 11, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29321010/evaluation-of-five-cad-cam-materials-by-microstructural-characterization-and-mechanical-tests-a-comparative-in-vitro-study
#19
Nesrin Sonmez, Pinar Gultekin, Volkan Turp, Gokhan Akgungor, Deniz Sen, Eitan Mijiritsky
BACKGROUND: Polymer infiltrated ceramics and nano-ceramic resins are the new restorative materials which have been developed in order to enhance the adverse properties of glass-matrix ceramics and resin composites. The aim of the present in vitro study was to evaluate the characteristics of various CAD/CAM materials through mechanical, microstructural, and SEM analysis. METHODS: Five test groups (n = 22) were formed by using the indicated CAD/CAM blocks: VITA Enamic (VITA Zahnfabrik), Lava Ultimate (3 M ESPE), IPS e...
January 8, 2018: BMC Oral Health
https://www.readbyqxmd.com/read/29311428/fracture-strengths-of-endocrown-restorations-fabricated-with-different-preparation-depths-and-cad-cam-materials
#20
Burcu Kanat-Ertürk, Serkan Saridağ, Ege Köseler, Dilek Helvacioğlu-Yiğit, Egemen Avcu, Yasemin Yildiran-Avcu
The objectives of this study were to compare the fracture strength of endocrown restorations fabricated with different preparation depth and various CAD/CAM ceramics, and to assess the fracture types. Endodontically treated 100 extracted human permanent maxillary centrals were divided into two preparation depth groups as short (S: 3-mm-deep) and long (L: 6-mm-deep), then five ceramic subgroups, namely: feldspathic-ceramic (Vita Mark II-VM2), lithium-disilicate glass-ceramic (IPS e.max CAD-E.max), resin-ceramic (LAVA Ultimate-LU), polymer infiltrated ceramic (Vita Enamic-VE) and monoblock zirconia (inCoris TZI-TZI) (n=10/subgroup)...
March 30, 2018: Dental Materials Journal
keyword
keyword
89446
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"