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https://www.readbyqxmd.com/read/29775274/oxide-based-composite-electrolytes-using-na3zr2si2po12-na3ps4-interfacial-ion-transfer
#1
Kousuke Noi, Yuka Nagata, Takashi Hakari, Kenji Suzuki, So Yubuchi, Yusuke Ito, Atsushi Sakuda, Akitoshi Hayashi, Masahiro Tatsumisago
All-solid-state sodium batteries using Na3Zr2Si2PO12 (NASICON) solid electrolytes are promising candidates for safe and low-cost advanced rechargeable battery systems. Although NASICON electrolytes have intrinsically high sodium ion conductivities, their high sintering temperatures interfere with the immediate development of high-performance batteries. In this work, sintering-free NASICON-based composites with Na3PS4 (NPS) glass-ceramics were prepared to combine the high grain-bulk conductivity of NASICON and the interfacial formation ability of NPS...
May 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29772248/scaffolds-for-peripheral-nerve-repair-and-reconstruction
#2
REVIEW
Sheng Yi, Lai Xu, Xiaosong Gu
Trauma-associated peripheral nerve defect is a widespread clinical problem. Autologous nerve grafting, the current gold standard technique for the treatment of peripheral nerve injury, has many internal disadvantages. Emerging studies showed that tissue engineered nerve graft is an effective substitute to autologous nerves. Tissue engineered nerve graft is generally composed of neural scaffolds and incorporating cells and molecules. A variety of biomaterials have been used to construct neural scaffolds, the main component of tissue engineered nerve graft...
May 14, 2018: Experimental Neurology
https://www.readbyqxmd.com/read/29767304/development-and-characterization-of-sr-containing-glass-ceramic-composites-based-on-biogenic-hydroxyapatite
#3
Oleksii Kuda, Nataliia Pinchuk, Oleksandr Bykov, Tamara Tomila, Olena Olifan, Maryna Golovkova
Composite materials based on hydroxyapatite are widely used for bone tissue engineering. There is evidence of a positive effect of the presence of strontium in osteoplastic materials in the case of a Ca/Sr certain ratio. To examine the effect of the addition of Sr2+ , a study was made by introducing it into the material composition based on biogenic hydroxyapatite and sodium borosilicate glass (50/50% wt.). The strontium was introduced into the composition in an amount of 1% wt. Composite materials were obtained at final sintering temperatures of 780 °C and a sintering time of 1 h...
May 16, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/29766651/adhesive-silane-application-effects-on-bond-strength-durability-to-a-lithium-disilicate-ceramic
#4
Jose C Romanini-Junior, Rose Y Kumagai, Luiz F Ortega, Jose A Rodrigues, Alessandra Cassoni, Ronaldo Hirata, Andre F Reis
OBJECTIVE: To test the effects of different adhesive protocols and silane application on the adhesive durability to a Lithium Disilicate reinforced glass ceramic. METHODS: Forty disks of 13 mm diameter (E.max Press) were used. After etching with 9.5% HF for 20 seconds, disks were randomly assigned into 4 groups according to the adhesive/silane protocol: silane application only (SIL); silane application followed by adhesive (SILXP-XP Bond); silane-containing adhesive (SBU-ScotchBond Universal); silane application followed by silane-containing adhesive (SILSBU)...
May 15, 2018: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/29765979/influence-of-material-selection-on-the-marginal-accuracy-of-cad-cam-fabricated-metal-and-all-ceramic-single-crown-copings
#5
Matthias Rödiger, Lea Schneider, Sven Rinke
This study evaluated the marginal accuracy of CAD/CAM-fabricated crown copings from four different materials within the same processing route. Twenty stone replicas of a metallic master die (prepared upper premolar) were scanned and divided into two groups. Group 1 ( n = 10) was used for a pilot test to determine the design parameters for best marginal accuracy. Group 2 ( n = 10) was used to fabricate 10 specimens from the following materials with one identical CAD/CAM system (GAMMA 202, Wissner GmbH, Goettingen, Germany): A = commercially pure (cp) titanium, B = cobalt-chromium alloy, C = yttria-stabilized zirconia (YSZ), and D = leucite-reinforced glass-ceramics...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29758399/phosphorus-solubility-in-basaltic-glass-limitations-for-phosphorus-immobilization-in-glass-and-glass-ceramics
#6
M Tarrago, M Garcia-Valles, S Martínez, D R Neuville
The composition of sewage sludge from urban wastewater treatment plants is simulated using P-doped basalts. Electron microscopy analyses show that the solubility of P in the basaltic melt is limited by the formation of a liquid-liquid immiscibility in the form of an aluminosilicate phase and a Ca-Mg-Fe-rich phosphate phase. The rheological behavior of these compositions is influenced by both phase separation and nanocrystallization. Upon a thermal treatment, the glasses will crystallize into a mixture of inosilicates and spinel-like phases at low P contents and into Ca-Mg-Fe phosphate at high P contents...
May 11, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29756242/novel-materials-for-3d-printing-by-photopolymerization
#7
Michael Layani, Xiaofeng Wang, Shlomo Magdassi
The field of 3D printing, also known as additive manufacturing (AM), is developing rapidly in both academic and industrial research environments. New materials and printing technologies, which enable rapid and multimaterial printing, have given rise to new applications and utilizations. However, the main bottleneck for achieving many more applications is the lack of materials with new physical properties. Here, some of the recent reports on novel materials in this field, such as ceramics, glass, shape-memory polymers, and electronics, are reviewed...
May 13, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29744467/3d-bioactive-composite-scaffolds-for-bone-tissue-engineering
#8
REVIEW
Gareth Turnbull, Jon Clarke, Frédéric Picard, Philip Riches, Luanluan Jia, Fengxuan Han, Bin Li, Wenmiao Shu
Bone is the second most commonly transplanted tissue worldwide, with over four million operations using bone grafts or bone substitute materials annually to treat bone defects. However, significant limitations affect current treatment options and clinical demand for bone grafts continues to rise due to conditions such as trauma, cancer, infection and arthritis. Developing bioactive three-dimensional (3D) scaffolds to support bone regeneration has therefore become a key area of focus within bone tissue engineering (BTE)...
September 2018: Bioactive Materials
https://www.readbyqxmd.com/read/29743520/low-yellowing-phosphor-in-glass-for-high-power-chip-on-board-white-leds-by-optimizing-a-low-melting-sn-p-f-o-glass-matrix
#9
Hee Chang Yoon, Kouhara Yoshihiro, Heeyeon Yoo, Seung Woo Lee, Ji Hye Oh, Young Rag Do
We introduce a low-melting-point (MP) Sn-P-F-O glass ceramic material into the phosphor-in-glass (PIG) material to realize an 'on-chip' chip-on-board (COB) type of phosphor-converted (pc) white light-emitting diode (WLED) with green (BaSr)2 SiO4 :Eu2+ and red (SrCa)AlSiN3 :Eu2+ (SCASN) phosphors. The optimum Sn-P-F-O-based ceramic components can be sintered into the glass phase with a facile one-step heating process at 285 °C for 1 min. Specifically, these soft-fabrication conditions can be optimized to minimize the degradation of the luminescent properties of the red SCASN phosphor as well as the green silicate phosphor in PIG-based white COB-type pc-LEDs owing to the low thermal loss of the phosphors at low fabrication temperatures below 300 °C...
May 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29741081/additive-manufacturing-of-transparent-silica-glass-from-solutions
#10
Ido Cooperstein, Efrat Shukrun, Ofir Press, Alexander Kamyshny, Shlomo Magdassi
A sol, aqueous solution based ink is presented for fabrication of 3D transparent silica glass objects with complex geometries, by a simple 3D printing process conducted at room temperature. The ink combines a hybrid ceramic precursor that can undergo both photopolymerization reaction and a sol-gel process, both in a solution form, without any particles. The printing is conducted by localized photopolymerization with the use of a low-cost 3D printer. Following printing, upon aging and densifying, the resulting objects convert from a gel to a xerogel and then to a fused silica...
May 9, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29736185/evaluation-of-different-restoration-combinations-used-in-the-reattachment-of-fractured-teeth-a-finite-element-analysis
#11
Nagihan Guven, Ozgur Topuz, İhsan Yikilgan
Objective: The purpose of this study was to test different restoration combinations used for constructing fractured endodontically treated incisors by reattaching their fractured fragments. Methods: Seven types of 3-D FEM mathematical root canal-filled models were generated, simulating cases of (OB) reattaching fractured fragments; (CrPL) reattaching fractured fragments + ceramic palatinal laminate; (CmPL) reattaching fractured fragments + composite palatinal laminate; (CM) reattaching fractured fragments + coronal 1/3 of the root was filled using core material; (BP) reattaching fractured fragments + glass fiber post; (CP) composite resin restoration + glass fiber post; and (OC) composite resin restoration...
2018: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29732016/effect-of-surface-preparation-with-nd-yag-and-er-cr-ysgg-lasers-on-the-repair-bond-strength-of-lithium-disilicate-glass-ceramic-to-a-silorane-based-composite-resin
#12
Mohammad Esmaeel Ebrahimi Chaharom, Fatemeh Pournaghi Azar, Narmin Mohammadi, Rezvan Nasiri
Background. This study was undertaken to evaluate the repair bond strength of lithium disilicate glass ceramic to a silorane-based composite resin after surface preparation with Nd:YAG and Er,Cr:YSGG lasers. Methods. A total of 102 lithium disilicate glass ceramic samples (IPS e.max Press), measuring 5 mm in diameter and 4 mm in thickness, were randomly assigned to 6 groups (n=17): group 1, no surface preparation (control); group 2, acid etching with 9.5% hydrofluoric acid (HF); group 3, surface preparation with 4...
2018: Journal of Dental Research, Dental Clinics, Dental Prospects
https://www.readbyqxmd.com/read/29731271/effect-of-preparation-design-for-all-ceramic-restoration-on-maxillary-premolar-a-3d-finite-element-study
#13
Ebrahim Maghami, Ehsan Homaei, Khalil Farhangdoost, Edmond Ho Nang Pow, Jukka Pekka Matinlinna, James Kit-Hon Tsoi
PURPOSE: The aim of this study was to investigate and quantify the effect of preparation design parameters on a premolar restored with two different CAD/CAM ceramic crowns by three-dimensional finite element analysis (FEA). METHODS: A restored human first premolar was digitized by a micro-CT scanner and a 3D model was created by a medical image processing software (Mimics). Following segmentation, dentine and ceramic were extracted by a surface meshing software (3-matic)...
May 3, 2018: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/29729577/effect-of-two-step-and-one-step-surface-conditioning-of-glass-ceramic-on-adhesion-strength-of-orthodontic-bracket-and-effect-of-thermo-cycling-on-adhesion-strength
#14
Moshabab A Asiry, Ibrahim AlShahrani, Samer M Alaqeel, Bangalore H Durgesh, Ravikumar Ramakrishnaiah
PURPOSE: The adhesion strength of orthodontic brackets bonded to dental glass ceramics was evaluated after ceramic surface was treated with two-step and one-step surface conditioning systems, and subjecting to thermo-cycling. MATERIALS AND METHOD: A total of forty specimens were fabricated from silica based glass ceramic (lithium disilicate) by duplicating the buccal surface of maxillary first premolar. The specimens were randomly assigned to two experimental groups (n = 20), group one specimens were treated with two-step surface conditioning system (IPS ceramic etching gel™ and Monobond plus™) and group two specimens were treated with one-step surface conditioning system (Monobond etch and prime™)...
April 26, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29724557/analysis-of-flexural-strength-and-contact-pressure-after-simulated-chairside-adjustment-of-pressed-lithium-disilicate-glass-ceramic
#15
Ali Ramadhan, Geoffrey A Thompson, Georgios Maroulakos, David Berzins
STATEMENT OF PROBLEM: Research evaluating load-to-failure of pressed lithium disilicate glass-ceramic (LDGC) with a clinically validated test after adjustment and repair procedures is scarce. PURPOSE: The purpose of this in vitro study was to investigate the effect of the simulated chairside adjustment of the intaglio surface of monolithic pressed LDGC and procedures intended to repair damage. MATERIAL AND METHODS: A total of 423 IPS e.max Press (Ivoclar Vivadent AG) disks (15 mm diameter, 1 mm height) were used in the study...
April 30, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29724551/influence-of-low-temperature-degradation-on-the-wear-characteristics-of-zirconia-against-polymer-infiltrated-ceramic-network-material
#16
Zhichao Hao, Yuanyuan Ma, Wenjia Liu, Yukun Meng, Keisuke Nakamura, Jiefei Shen, Hang Wang
STATEMENT OF PROBLEM: Low-temperature degradation may affect zirconia restorations during their clinical service. Concerns have been raised about the effect of low-temperature degradation on the wear behavior of zirconia. Moreover, the wear resistance of this novel polymer-infiltrated ceramic-network material needs to be better evaluated. PURPOSE: The purpose of this in vitro study was to investigate the influence of aging on the wear resistance of zirconia opposing polymer-infiltrated ceramic-network material...
April 30, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29724550/effect-of-different-resin-cements-and-surface-treatments-on-the-shear-bond-strength-of-ceramic-glass-polymer-materials
#17
Gülce Alp, Meryem Gülce Subaşı, William M Johnston, Burak Yilmaz
STATEMENT OF PROBLEM: The effect of different surface treatment techniques on the bond strength of different types of ceramic-glass polymer computer-assisted design and computer-assisted manufacturing (CAD-CAM) materials and resin cements after aging is unknown. PURPOSE: The purpose of this in vitro study was to evaluate the surface roughness of different ceramic-glass polymer CAD-CAM materials after 2 different surface treatments and the effect of material, surface treatment, resin cement, and aging on bond strength...
April 30, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29713430/repair-bond-strength-of-resin-composite-to-bilayer-dental-ceramics
#18
Ayse Seda Ataol, Gulfem Ergun
PURPOSE: The purpose of this study was to investigate the effect of various surface treatments (ST) on the shear bond strength of resin composite to three bilayer dental ceramics made by CAD/CAM and two veneering ceramics. MATERIALS AND METHODS: Three different bilayer dental ceramics and two different veneering ceramics were used (Group A: IPS e.max CAD+IPS e.max Ceram; Group B: IPS e.max ZirCAD+IPS e.max Ceram, Group C: Vita Suprinity+Vita VM11; Group D: IPS e...
April 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29707613/an-overview-of-development-and-status-of-fiber-reinforced-composites-as-dental-and-medical-biomaterials
#19
REVIEW
Pekka K Vallittu
Fibr-reinforced composites (FRC) have been used successfully for decades in many fields of science and engineering applications. Benefits of FRCs relate to physical properties of FRCs and versatile production methods, which can be utilized. Conventional hand lamination of prefabricated FRC prepregs is utilized still most commonly in fabrication of dental FRC devices but CAD-CAM systems are to be come for use in certain production steps of dental constructions and medical FRC implants. Although metals, ceramics and particulate filler resin composites have successfully been used as dental and medical biomaterials for decades, devices made out of these materials do not meet all clinical requirements...
2018: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/29705528/influence-of-ageing-on-glass-and-resin-bonding-of-dental-glass-ceramic-veneer-adhesion-to-zirconia-a-fracture-mechanics-analysis-and-interpretation
#20
M V Swain, C Gee, K-C Li
Adhesion plays a major role in the bonding of dental materials. In this study the adhesion of two glass-ceramic systems (IPS e.max and VITABLOCS) to a zirconia sintered substrate using a glass (for IPS e.max) and resin (VITABLOCS) before and after exposure to ageing for 14 days in distilled water at 37°C are compared using two interfacial fracture mechanics tests, the 3 point bend Schwickerath (1,2) and 4 point bend [3] approaches. Both tests result in stable crack extension from which the strain energy release rate (G, N/m or J/m2 ) can be determined...
April 26, 2018: Acta Biomaterialia
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