keyword
MENU ▼
Read by QxMD icon Read
search

all ceramics

keyword
https://www.readbyqxmd.com/read/29049418/effects-of-femtosecond-laser-and-other-surface-treatments-on-the-bond-strength-of-metallic-and-ceramic-orthodontic-brackets-to-zirconia
#1
Verónica García-Sanz, Vanessa Paredes-Gallardo, Carlos Bellot-Arcís, Omel Mendoza-Yero, Carlos Doñate-Buendía, Javier Montero, Alberto Albaladejo
Femtosecond laser has been proposed as a method for conditioning zirconia surfaces to boost bond strength. However, metallic or ceramic bracket bonding to femtosecond laser-treated zirconia surfaces has not been tested. This study compared the effects of four conditioning techniques, including femtosecond laser irradiation, on shear bond strength (SBS) of metallic and ceramic brackets to zirconia.Three hundred zirconia plates were divided into five groups: 1) control (C); 2) sandblasting (APA); 3) silica coating and silane (SC); 4) femtosecond laser (FS); 5) sandblasting followed by femtosecond laser (APA+SC)...
2017: PloS One
https://www.readbyqxmd.com/read/29044828/fracture-resistance-of-monolithic-glass-ceramics-versus-bilayered-zirconia-based-restorations
#2
Tamer A Hamza, Rana M Sherif
PURPOSE: To compare the fracture resistance of monolithic reinforced glass-ceramic restorations with bilayer zirconia-based restorations. MATERIALS AND METHODS: Fifteen ceramic crowns were fabricated on epoxy dies duplicated from a stainless steel master die. They were divided into 3 equal groups (n = 5) according to the type of ceramic material used: group I, monolithic lithium disilicate (IPS e.max CAD), group V, monolithic zirconia-reinforced lithium silicate (Vita Suprinity), and group B (bilayered zirconia substructure with veneering ceramic)...
October 18, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29044723/the-effects-of-crown-venting-or-pre-cementing-of-cad-cam-constructed-all-ceramic-crowns-luted-on-ytz-implants-on-marginal-cement-excess
#3
Lucia K Zaugg, Isabella Zehnder, Nadja Rohr, Jens Fischer, Nicola U Zitzmann
OBJECTIVES: The purpose of this study was to analyze the cement excess produced when cementing CAD/CAM-fabricated lithium disilicate (L) or zirconium dioxide (Z) crowns using adhesive cement (A) or resin-modified glass ionomer cement (B). Three different cementation techniques were applied: palatal venting (PV), pre-cementation with custom analogs (CA), and conventional standard procedure (SP). MATERIALS AND METHODS: Seventy-two crowns (36 each material) were assigned to 12 experimental groups depending on the restoration material (L, Z), type of cement (A, B), and cementation technique (PV, CA, SP)...
October 17, 2017: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/29039965/scanning-electron-microscope-comparative-surface-evaluation-of-glazed-lithium-disilicate-ceramics-under-different-irradiation-settings-of-nd-yag-and-er-yag-lasers
#4
Josko Viskic, Drazen Jokic, Suzana Jakovljevic, Lana Bergman, Sladana Milardovic Ortolan, Senka Mestrovic, Ketij Mehulic
OBJECTIVE: To evaluate the surface of glazed lithium disilicate dental ceramics after irradiation under different irradiation settings of Nd:YAG and Er:YAG lasers using a scanning electron microscope (SEM). MATERIALS AND METHODS: Three glazed-press lithium disilicate ceramic discs were treated with HF, Er:YAG, and Nd:YAG, respectively. The laser-setting variables tested were laser mode, repetition rate (Hz), power (W), time of exposure (seconds), and laser energy (mJ)...
October 17, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/29028848/the-stability-of-augmented-bone-between-two-different-membranes-used-for-guided-bone-regeneration-simultaneous-with-dental-implant-placement-in-the-esthetic-zone
#5
Sirida Arunjaroensuk, Soontra Panmekiate, Atiphan Pimkhaokham
PURPOSE: This randomized controlled clinical trial compared the stability of augmented bone between a synthetic resorbable membrane and a collagen resorbable membrane with guided bone regeneration (GBR) simultaneous with dental implant placement in the esthetic zone in terms of facial bone thickness. MATERIALS AND METHODS: A total of 60 dental implants from patients requiring implant placement with simultaneous GBR in the esthetic zone were equally allocated to the test group or control group by block randomization...
October 13, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29028438/laser-sintering-technology-and-balling-phenomenon
#6
Perihan Oyar
OBJECTIVE: The aim of this review was to evaluate the balling phenomenon which occurs typically in Selective Laser Sintering (SLS). BACKGROUND DATA: The balling phenomenon is a typical SLS defect, and observed in laser sintered powder, significantly reduces the quality of SLS, and hinders the further development of SLS Technology. METHODS: Electronic database searches were performed using Google Scholar. The keywords "laser sintering, selective laser sintering, direct metal laser melting, and balling phenomenon" were searched in title/abstract of publications, limited to December 31, 2016...
October 13, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/29027180/effect-of-zrb2-addition-on-the-oxidation-behavior-of-si-sic-zrb2-composites-exposed-at-1500%C3%A2-c-in-air
#7
Claudio D'Amico, Giovanni Bianchi, Elisa Padovano, Sara Biamino, Alberta Aversa, Claudio Badini, Alberto Ortona
BACKGROUND: Silicon carbide ceramics obtained by reactive infiltration of silicon (SRI) have many industrial applications especially involving severe and high temperature conditions. In this study, the oxidation behavior in air of Si-SiC-ZrB2 systems at a high temperature (1500°C) for dwelling times of up to 48 hours was examined. METHODS: The oxidation process was analyzed on the basis of elemental maps and X-ray diffraction patterns taken, respectively, on the core and on the surface of the specimens, together with weight gains and the average thicknesses of the resulting scale...
October 6, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/29026055/childhood-lead-poisoning-an-overview
#8
REVIEW
K L Hon, C K Fung, A Kc Leung
Childhood lead poisoning is a major public health concern in many countries. In 2015, the Hong Kong SAR Government and its citizens faced a major public health crisis due to the presence of lead in the drinking water of a number of public housing estates. Fortunately, no child was diagnosed with lead poisoning that required treatment with chelation. Lead is a ubiquitous, naturally occurring material that exists in air, dust, soil, and water. It is also widely present in industrial products including petrol, paints, ceramics, food cans, candies, cosmetics, traditional remedies, batteries, solder, stained glass, crystal vessels, ammunition, ceramic glazes, jewelry, and toys...
October 13, 2017: Hong Kong Medical Journal, Xianggang Yi Xue za Zhi
https://www.readbyqxmd.com/read/28992085/assessment-of-dna-damage-in-ceramic-workers
#9
Hatice Gul Anlar, Gokce Taner, Merve Bacanli, Servet Iritas, Turker Kurt, Engin Tutkun, Omer Hinc Yilmaz, Nursen Basaran
It is known that ceramic workers are potentially exposed to complex mixture of chemicals such as silica, inorganic lead, lime, beryllium and aluminum that can be associated with an increased risk of several diseases. All operations in the ceramic industries such as mixing, moulding, casting, shaking out and finishing jobs, have been associated with the higher exposure levels and in most of the silica-related industries, average overall exposure exceeded permissible exposure levels for respirable crystalline silica...
July 19, 2017: Mutagenesis
https://www.readbyqxmd.com/read/28989124/comparison-of-shear-bond-strengths-of-conventional-resin-cement-and-self-adhesive-resin-cement-bonded-to-lithium-disilicate-an-in-vitro-study
#10
Anip K Roy, Dennis Mohan, M Sunith, Rashmi B Mandokar, S Suprasidh, Soumya Rajan
AIM: The aim of this study is to compare the shear bond strengths of conventional resin cement and self-adhesive resin cement bonded to lithium disilicate. MATERIALS AND METHODS: A total of 40 extracted human molar teeth were mounted in self-cure acrylic resin. Teeth were prepared to obtain flat occlusal surface. About 40 lithium disilicate specimens of dimension-10 mm in diameter and thickness of 2 mm-were fabricated using lost wax technique. The samples were divided into four groups: Groups I, II, III, and IV (n = 10)...
October 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28988143/fatigue-failure-load-of-zirconia-reinforced-lithium-silicate-glass-ceramic-cemented-to-a-dentin-analogue-effect-of-etching-time-and-hydrofluoric-acid-concentration
#11
Jaiane Bandoli Monteiro, Marcelo Gallo Oliani, Luis Felipe Guilardi, Catina Prochnow, Gabriel Kalil Rocha Pereira, Marco Antonio Bottino, Renata Marques de Melo, Luiz Felipe Valandro
This study aimed to evaluate the effect of etching time and hydrofluoric acid (HF) concentration on the fatigue failure load and surface characteristics of zirconia-reinforced lithium silicate glass (ZLS) ceramic cemented to a dentin-like, fiber reinforced epoxy resin. Ceramic (Suprinity, VITA) (1.0mm thick) and epoxy resin (2.5mm thick) discs (10mm diameter) were produced. The bonding surface of the ceramic samples was nonetched (control group), or etched for 30, 60 or 90s by 5% or 10% HF. The epoxy resin discs were etched by 10% HF for 30s followed by the application of an adhesive material (Single Bond Universal, 3M ESPE)...
September 23, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28985448/a-systematic-review-of-the-survival-and-complication-rates-of-all-ceramic-resin-bonded-fixed-dental-prostheses
#12
REVIEW
Junyu Chen, He Cai, Xiaochun Ren, Lai Suo, Xibo Pei, Qianbing Wan
PURPOSE: The aim of this systematic review was to investigate the survival and complication rates of all-ceramic resin-bonded fixed dental prostheses (RBFDPs). MATERIALS AND METHODS: The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were applied. A systematic search was conducted by an electronic search in PubMed, EMBASE, Cochrane Library, and CNKI databases complemented by a manual search. Only clinical studies on all-ceramic RBFDPs with a mean follow-up period of at least 3 years qualified for data analyses...
October 6, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28983530/ceramic-laminate-veneers-clinical-procedures-with-a-multidisciplinary-approach
#13
Marco Veneziani
Complex cases with high esthetic needs represent a challenge for clinicians. A multidisciplinary approach is vital to achieve the planned result. New technological devices are needed to facilitate the collaboration between the clinical team members and to develop a fluent and effective diagnostic and therapeutic pathway. This article describes a well-defined protocol for the treatment of complex esthetic cases with the use of ceramic laminate veneers. The protocol involves different branches of dentistry: periodontal therapy, mucogingival surgery, restorative dentistry, orthodontics, and prosthodontics...
2017: International Journal of Esthetic Dentistry
https://www.readbyqxmd.com/read/28983216/ceramic-bearings-with-titanium-adapter-sleeves-implanted-during-revision-hip-arthroplasty-show-minimal-fretting-or-corrosion-a-retrieval-analysis
#14
Chelsea N Koch, Mark Figgie, Mark P Figgie, Marcella E Elpers, Timothy M Wright, Douglas E Padgett
BACKGROUND: The BIOLOX® option system, consisting of a BIOLOX® delta ceramic femoral head with a titanium alloy adapter sleeve, is being increasingly utilized in revision hip arthroplasty. The sleeve protects the ceramic head from fracture and improper motion about the stem trunnion when a damaged trunnion is encountered at revision surgery. Corrosion and fretting due to metal-metal contact at the taper region of hip prosthesis create the potential of causing periprosthetic osteolysis and adverse local tissue reactions...
October 2017: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
https://www.readbyqxmd.com/read/28976838/bulk-fill-composites-effectiveness-of-cure-with-poly-and-monowave-curing-lights-and-modes
#15
J K Gan, A U Yap, J W Cheong, N Arista, Cbk Tan
This study compared the effectiveness of cure of bulk-fill composites using polywave light-emitting diode (LED; with various curing modes), monowave LED, and conventional halogen curing lights. The bulk-fill composites evaluated were Tetric N-Ceram bulk-fill (TNC), which contained a novel germanium photoinitiator (Ivocerin), and Smart Dentin Replacement (SDR). The composites were placed into black polyvinyl molds with cylindrical recesses of 4-mm height and 3-mm diameter and photopolymerized as follows: Bluephase N Polywave High (NH), 1200 mW/cm(2) (10 seconds); Bluephase N Polywave Low (NL), 650 mW/cm(2) (18...
October 4, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28973945/an-anion-immobilized-composite-electrolyte-for-dendrite-free-lithium-metal-anodes
#16
Chen-Zi Zhao, Xue-Qiang Zhang, Xin-Bing Cheng, Rui Zhang, Rui Xu, Peng-Yu Chen, Hong-Jie Peng, Jia-Qi Huang, Qiang Zhang
Lithium metal is strongly regarded as a promising electrode material in next-generation rechargeable batteries due to its extremely high theoretical specific capacity and lowest reduction potential. However, the safety issue and short lifespan induced by uncontrolled dendrite growth have hindered the practical applications of lithium metal anodes. Hence, we propose a flexible anion-immobilized ceramic-polymer composite electrolyte to inhibit lithium dendrites and construct safe batteries. Anions in the composite electrolyte are tethered by a polymer matrix and ceramic fillers, inducing a uniform distribution of space charges and lithium ions that contributes to a dendrite-free lithium deposition...
October 2, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28970571/local-disorder-in-na0-5bi0-5tio3-piezoceramic-determined-by-3d-electron-diffuse-scattering
#17
Alexandra Neagu, Cheuk-Wai Tai
Local structural distortions in Na0.5Bi0.5TiO3-based solid solutions have been proved to play a crucial role in understanding and tuning their enhanced piezoelectric properties near the morphotropic phase boundary. In this work all local structural disorders in a lead-free ternary system, namely 85%Na0.5Bi0.5TiO3-10%Bi0.5K0.5TiO3-5%BaTiO3, were mapped in reciprocal space by 3D electron diffraction. Furthermore, a comprehensive model of the local disorder was developed by analysing the intensity and morphology of the observed weak diffuse scattering...
October 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28969920/evaluating-ceramic-crown-margins-with-digital-radiography
#18
William Maxwell Wahle, Radi Masri, Carl Driscoll, Elaine Romberg
STATEMENT OF PROBLEM: Radiographs aid in clinically determining crown fit, specifically interproximal margins where tactile and visual methods may be limited. However, investigations of the utility of digital radiographs as a tool for evaluating the marginal openings of ceramic crowns are lacking. PURPOSE: The purpose of this in vitro study was to assess whether marginal adaptation for ceramic crowns and for metal-ceramic crowns with a metal collar can be identified with digital radiographs...
September 29, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28969918/marginal-and-internal-fit-of-pressed-lithium-disilicate-inlays-fabricated-with-milling-3d-printing-and-conventional-technologies
#19
Foudda R Homsy, Mutlu Özcan, Marwan Khoury, Zeina A K Majzoub
STATEMENT OF PROBLEM: The subtractive and additive computer-aided design and computer-aided manufacturing (CAD-CAM) of lithium disilicate partial coverage restorations is poorly documented. PURPOSE: The purpose of this in vitro study was to compare the marginal and internal fit accuracy of lithium disilicate glass-ceramic inlays fabricated with conventional, milled, and 3-dimensional (3D) printed wax patterns. MATERIAL AND METHODS: A dentoform mandibular first molar was prepared for a mesio-occlusal ceramic inlay...
September 29, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28969917/influence-of-spark-erosion-on-the-fit-of-screw-retained-co-cr-fixed-complete-denture-frameworks-veneered-with-different-materials
#20
Anna Gabriella Camacho Presotto, Luciana Valadares Oliveira, Marina Xavier Pisani, Valentim Adelino Ricardo Barão, Marcelo Ferraz Mesquita
STATEMENT OF PROBLEM: Spark erosion is a fit corrective technology that can be used even after the veneering material has been applied. The framework does not require sectioning, thus preserving its mechanical resistance. However, the spark erosion effect on veneered Co-Cr fixed complete denture (FCD) frameworks has not been investigated. PURPOSE: The purpose of this in vitro study was to evaluate whether spark erosion is effective in improving marginal fit on screw-retained Co-Cr FCD frameworks veneered with different materials...
September 29, 2017: Journal of Prosthetic Dentistry
keyword
keyword
102359
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"