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https://www.readbyqxmd.com/read/29649121/synthesis-of-hydroxyapatite-%C3%AE-tricalcium-phosphate-and-biphasic-calcium-phosphate-particles-to-act-as-local-delivery-carriers-of-curcumin-loading-release-and-in-vitro-studies
#1
Despoina Xidaki, Panagiota Agrafioti, Dimitra Diomatari, Archontia Kaminari, Eleftherios Tsalavoutas-Psarras, Polyxeni Alexiou, Vasilios Psycharis, Effie C Tsilibary, Spyridon Silvestros, Marina Sagnou
The successful synthesis of hydroxyapatite (HA), β-Tricalcium phosphate (β-TCP) and two biphasic mixtures (BCPs) of the two was performed by means of wet precipitation. The resulting crystals were characterized and the BCP composition was analyzed and identified as 13% HA-87% TCP and 41% HA-59% TCP. All samples were treated with curcumin solutions, and the degree of curcumin loading and release was found to be proportional to the TCP content of the ceramic. No further cytotoxicity was observed upon MG-63 treatment with the curcumin-loaded ceramics...
April 12, 2018: Materials
https://www.readbyqxmd.com/read/29643874/effect-of-erbium-yttrium-scandium-gallium-and-garnet-er-ysgg-laser-on-the-bond-strength-of-lithium-disilicate-ceramics
#2
Mohammed Qasim Al Rifaiy
Objectives: To assess the bond strength of LD ceramics with resin composite material and surface conditioning using Er: YSGG laser and HF acid. Methods: Thirty LD ceramic (Emax, Ivoclar vivadent) discs were prepared using hot pressing technique and treated with hydroflouric acid (Group-1-HF acid) (9%) (n=10) and Er- yttrium, scandium, gallium and garnet laser (Group-2-ER-YSGG laser) (Waterlase iPlus, 10 Hz and power of 0.5 W, pulse duration of 230 μs) (n=10). Ten specimens were left untreated to be included as controls (Group-3-Control)...
January 2018: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/29629327/fracture-resistance-of-ceramic-crowns-supported-with-indirect-chair-side-composite-cores
#3
Khalid M Abdelaziz, Cinderella K Keshk, Abdulkhaliq Alshadidi, Salman Mafraq, David F Murchison
Aims and Objectives: To evaluate the influence of indirect chair-side polymerization of resin composite cores on the fracture resistance of overlaying IPS e.max Press crowns. Materials and Methods: Root canals of 60 extracted premolars were prepared to receive #2 fiber posts after the crowns were sectioned 2 mm above the cervical line. In Groups 1-3 ( n = 10 each), posts were luted to the prepared dowel spaces using self-adhesive resin cement. Resin composite cores were then bonded and incrementally built-up using Filtek Z250 XT, Filtek P60, and Filtek P90 resin composites...
January 2018: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/29627213/macro-and-microtopographical-examination-and-quantification-of-cad-cam-composite-resin-2-and-3-body-wear
#4
Carolin Stöckl, Rüdiger Hampe, Bogna Stawarczyk, Miriam Haerst, Malgorzata Roos
STATEMENT OF PROBLEM: The selection of an appropriate restorative material based on wear behavior is important for the long-term success of a dental restoration. For computer-aided design and computer-aided manufacturing (CAD-CAM) composite resins, information about their wear resistance and wear mechanism is scarce. PURPOSE: The purpose of this in vitro study was to compare the 2- and 3-body wear of CAD-CAM composite resins with that of lithium disilicate ceramic and to develop analysis software...
April 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29627208/influence-of-repeated-firings-on-marginal-axial-axio-occlusal-and-occlusal-fit-of-metal-ceramic-restorations-fabricated-with-different-techniques
#5
Özay Önöral, Mutahhar Ulusoy, Emre Seker, İlker Etikan
STATEMENT OF PROBLEM: Ill-fitting restorations can jeopardize dental, periodontal, and systemic health. Repeated ceramic firing may influence the fitting accuracy of restorations, but scientific information regarding this issue is lacking. PURPOSE: The purpose of this in vitro study was to assess and compare the influence of repeated firings on the marginal, axial, axio-occlusal, and occlusal fit of metal-ceramic 3-unit fixed partial dentures (FPDs) manufactured with different framework methods, including casting, fully sintered hard alloy milling (FHAM), presintered soft alloy milling (PSAM), and selective laser sintering (SLS)...
April 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29624695/effect-of-passive-drying-on-ascorbic-acid-%C3%AE-tocopherol-and-%C3%AE-carotene-in-tomato-and-mango
#6
Jamey C Smith, William V Biasi, Dirk Holstege, Elizabeth J Mitcham
The effect of two passive drying methods on the degradation of ascorbic acid (vitamin C),  α-tocopherol (vitamin E), and β-carotene (provitamin A) in ripe mango and tomato was determined. Samples of both commodities were dried outdoors in a solar drying cabinet or indoors in sealed plastic boxes containing ceramic zeolite drying beads in a bead-to-fruit ratio of 1:10. Nutrient content of the dried samples was compared to fresh samples (undried control) obtained from the same batch of fruit. Mango samples tended to reach an equilibrium weight of approximately 18% of their initial weight after 28 to 30 hr of drying in both drying methods, while tomatoes equilibrated at 5% to 6% of their initial weight after 8 to 10 hr of drying in the solar drying cabinet and after approximately 30 hr using drying beads...
April 6, 2018: Journal of Food Science
https://www.readbyqxmd.com/read/29610618/effect-of-luting-cements-on-the-bond-strength-to-turkom-cera-all-ceramic-material
#7
Bandar M A Al-Makramani, Abdul A A Razak, Mohamed I Abu-Hassan, Fuad A Al-Sanabani, Fahad M Albakri
BACKGROUND: The selection of the appropriate luting cement is a key factor for achieving a strong bond between prepared teeth and dental restorations. AIM: To evaluate the shear bond strength of Zinc phosphate cement Elite, glass ionomer cement Fuji I, resin-modified glass ionomer cement Fuji Plus and resin luting cement Panavia-F to Turkom-Cera all-ceramic material. MATERIALS AND METHODS: Turkom-Cera was used to form discs 10mm in diameter and 3 mm in thickness (n = 40)...
March 15, 2018: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/29607866/shear-bond-strength-of-a-novel-porcelain-repair-system-for-different-computer-aided-design-computer-assisted-manufacturing-ceramic-materials
#8
M Karcı, N Demir, M G Subaşı, M Gökkaya
Objectives: The purpose of this study was to compare the shear bond strength of a novel repair system, Nova Compo SF with Ceramic Repair, Ivoclar, to computer-aided design/computer-assisted manufacturing (CAD/CAM) restorative materials (IPS e.max CAD and Empress CAD). Materials and Methods: The specimens of each CAD/CAM restorative material were randomly divided into two subgroups of nine specimens, using one of two repair systems. All specimens were etched with hydrofluoric acid and rinsed under a water spray for 10 s, then air-dried for 10 s...
April 2018: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/29607851/evaluation-of-the-fracture-resistance-of-computer-aided-design-computer-aided-manufacturing-monolithic-crowns-prepared-in-different-cement-thicknesses
#9
N Polat Sagsoz, N Yanıkoglu
Introduction: The purpose of this study was to evaluate the fracture resistance of monolithic computer-aided design/computer-aided manufacturing (CAD/CAM) crowns that are prepared with different cement thickness. Materials and Methods: For this investigation, a human maxillary premolar tooth was selected. Master model preparation was performed with a demand bur under water spray. Master die was taken to fabricate 105 epoxy resin replicas. The crowns were milled using a CEREC 4 CAD/CAM system (Software Version, 4...
April 2018: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/29605739/superhydrophobic-ceramic-coating-fabrication-by-solution-precursor-plasma-spray-and-investigation-of-wetting-behavior
#10
Pengyun Xu, Thomas W Coyle, Larry Pershin, Javad Mostaghimi
HYPOTHESIS: Superhydrophobic surfaces are often created by fabricating suitable surface structures from low-surface-energy organic materials using processes that are not suitable for large-scale fabrication. Rare earth oxides (REO) exhibit hydrophobic behavior that is unusual among oxides. Solution precursor plasma spray (SPPS) deposition is a rapid, one-step process that can produce ceramic coatings with fine scale columnar structures. Manipulation of the structure of REO coatings through variation in deposition conditions may allow the wetting behavior to be controlled...
March 16, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29605202/can-the-ceramic-industry-be-a-new-and-hazardous-sector-for-work-related-asthma
#11
Ozlem Kar Kurt, Dilek Ergun, Nursen Basaran
BACKGROUND: Work-related asthma (WRA) constitutes a significant proportion of all asthma cases and continues to be reported from different industries. The aim of the study was to identify the occupations that can be related to WRA and diagnostic steps used in suspected WRA patients. METHODS: We retrospectively reviewed the clinical records of WRA suspected patients who were referred to Ankara Occupational and Environmental Diseases Hospital, Turkey from January 2015 to January 2017...
April 2018: Respiratory Medicine
https://www.readbyqxmd.com/read/29605190/fracture-strength-testing-of-crowns-made-of-cad-cam-composite-resins
#12
Ryota Okada, Masaki Asakura, Akihiro Ando, Hirokazu Kumano, Seiji Ban, Tatsushi Kawai, Jun Takebe
PURPOSE: The purpose of this study was to ascertain whether computer aided design/computer aided manufacturing (CAD/CAM) composite resin crowns have sufficient strength to withstand the bite force of the molar teeth. The null hypothesis was that the fracture strength of CAD/CAM composite resin crowns is lower than the average maximum bite force of the molar tooth. METHODS: The crowns, which shape is the right maxillary first molar, were fabricated using four CAD/CAM blanks made of composite resins (Block HC: HC, KZR-CAD HR: HR, KZR-CAD HR2: HR2, Avencia Block: AVE) and one CAD/CAM blank made of lithium disilicate glass-ceramic (IPS e...
March 28, 2018: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/29601988/oxide-ceramic-femoral-heads-contribute-to-the-oxidation-of-polyethylene-liners-in-artificial-hip-joints
#13
Giuseppe Pezzotti, Wenliang Zhu, Nobuhiko Sugano, Elia Marin, Kengo Yamamoto, Naomichi Nishiike, Tsubasa Hori, Alfredo Rondinella, Bryan J McEntire, Ryan Bock, B Sonny Bal
Experimental evidence demonstrates that a loss of stoichiometry at the surface of oxide bioceramic femoral heads enhances the oxidation rate of polyethylene acetabular liners in artificial hip joints. Contradicting the common notion that ceramics are bioinert, three independent experiments confirmed substantial chemical interactions between the ceramic femoral heads and their polyethylene counterparts. The experiments reported herein included hydrothermal tests, frictional tests, and hip-simulator experiments...
March 17, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29600867/minimally-invasive-ceramic-restorations-a-step-by-step-clinical-approach
#14
Carlos Marcelo Archangelo, José Carlos Romanini, Karen Cristina Archangelo, Isis Almela Endo Hoshino, Rodolfo Bruniera Anchieta
Minimally invasive treatments are a dominant trend in dentistry. Due to the evolution of adhesive materials and ceramics, minimalistic ceramic restorations have been proposed as alternative treatment options to avoid unnecessary tooth reduction. The aim of this article is to show a clinical protocol for the correct diagnosis, treatment planning, and execution of minimally invasive ceramic veneers. Requiring only slight tooth preparation, this conservative technique is well-suited for restoration of teeth that need color and shape modification...
April 2018: Compendium of Continuing Education in Dentistry
https://www.readbyqxmd.com/read/29599034/clinical-outcomes-and-bearing-specific-complications-following-fourth-generation-alumina-ceramic-on-ceramic-total-hip-arthroplasty-a-single-surgeon-series-of-749-hips-at-a-minimum-of-5-year-follow-up
#15
Seung-Jae Lim, Hyung-Gon Ryu, Hyeon-Jun Eun, Chan-Woo Park, Kyeu-Back Kwon, Youn-Soo Park
BACKGROUND: The purpose of this study is to evaluate the minimum 5-year outcomes and bearing-specific complications in a single surgeon series of fourth-generation alumina ceramic-on-ceramic total hip arthroplasties (THAs). METHODS: We retrospectively analyzed 667 patients (749 hips) who underwent primary THAs by a single surgeon using fourth-generation alumina ceramic bearings. There were 315 men and 352 women with a mean age of 54.2 years. The surgeon used cementless prostheses with an identical design and BIOLOX Delta ceramics in all hips, using a 36-mm head in 472 hips (63%) and a 32-mm head in 227...
February 17, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29590666/effect-of-premolar-axial-wall-height-on-computer-aided-design-computer-assisted-manufacture-crown-retention
#16
Curt Martin, Ashley Harris, Nicholas DuVall, Michael Wajdowicz, Howard Wayne Roberts
PURPOSE: To evaluate the effect of premolar axial wall height on the retention of adhesive, full-coverage, computer-aided design/computer-assisted manufacture (CAD/CAM) restorations. MATERIALS AND METHODS: A total of 48 premolar teeth randomized into four groups (n = 12 per group) received all-ceramic CAD/CAM restorations with axial wall heights (AWH) of 3, 2, 1, and 0 mm and 16-degree total occlusal convergence (TOC). Specimens were restored with lithium disilicate material and cemented with self-adhesive resin cement...
March 28, 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29579085/a-performance-based-evaluation-of-chemically-similar-carbonate-tempers-from-late-prehistoric-ad-1200-1700-ohio-implications-for-human-selection-and-production-of-ceramic-technology
#17
Michelle Rae Bebber, Linda B Spurlock, Michael Fisch
PURPOSE: This study was designed to assess the mechanical properties of two calcium carbonate tempers, limestone and burnt shell. These tempers have been previously compared, in separate studies, to silicate-based grit or sand temper and, relative to the latter, are assumed to possess similar mechanical properties. However, their simultaneous use at the Morrison Village site begs the question: do these two calcium carbonate tempers indeed possess similar mechanical properties? In order to assess their performance characteristics, a side-by-side controlled experimental test was conducted to determine the degree of similarity in providing increased vessel strength and toughness...
2018: PloS One
https://www.readbyqxmd.com/read/29577587/influence-of-cuo-mgo-ratio-on-the-gene-expression-cytocompatibilty-and-antibacterial-anticancerous-analgesic-drug-loading-kinetics-for-15-x-cuo-xmgo-10p-2-o-5-60sio-2-10cao-5zno-2-5-%C3%A2-x-%C3%A2-12-5-mesoporous-bioactive-glasses
#18
Rupinderjeet Bains, Piyush Sharma, Rameez Ahmad Mir, Suninder Jeet, Gurbinder Kaur, Om Prakash Pandey
In the present study, novel mesoporous bioactive glasses (MBGs) (15-x)CuO-xMgO-10P2 O5 -60SiO2 -10CaO-5ZnO (2.5 ≤ x ≤ 12.5, varying in steps of 2) are synthesized using the sol-gel technique. The structural phases of the glasses/glass ceramics were studied by XRD. The pH variation and simulated body fluids (SBF) studies demonstrated the in-vitro bioactivity of all the MBGs. MBGs possess surface area variation between 98.22 to 442.41 cm2 /g. The pore size of MBGs lies in the range of 5.8 - 8.8 nm...
March 25, 2018: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29575452/bioactivity-of-novel-functionally-structured-titanium-ceramic-composites-in-contact-with-human-osteoblasts
#19
G M Peñarrieta-Juanito, M Costa, M Cruz, G Miranda, B Henriques, J Marques, R S Magini, A Mata, J Caramês, Fs F Silva, Jcm Souza
The aim of this study was to analyze the osteogenic cell behavior on the surface of novel functionally graded titanium-based composites containing bioactive ceramics. Titanium grade V discs (8 x 3 mm) embedding gradual content of hydroxyapatite (TiAlV-HA) or beta-tricalcium phosphate (TiAlV-βTCP) were produced by hot-pressing technique. Titanium-ceramic composite discs and Ti grade V (control group) were placed in contact with human osteoblast culture assays. The morphology and adhesion of osteoblasts were inspected by field emission guns scanning electron microscopy (FEGSEM) while cell viability was assessed by fluorometric method...
March 25, 2018: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29570759/using-ceramic-on-ceramic-bearings-in-total-hip-arthroplasty-necessitating-44-or-46-mm-metal-shells
#20
Chan Ho Park, Yong-Chan Ha, Young-Kyun Lee, Kyung-Hoi Koo
Ceramic-on-ceramic articulation shows the lowest wear, with a low incidence of osteolysis. A small cup limits options regarding liner thickness and femoral implant size. The purpose of this study was to evaluate the safety of a 4-mm-thick ceramic liner and the outcomes of cementless total hip arthroplasty using a 44- or 46-mm metal shell and a ceramic-on-ceramic bearing at mid- to long-term follow-up. Between May 2003 and June 2008, 80 patients (88 hips) who had hip osteoarthritis and a hypoplastic acetabulum underwent cementless total hip arthroplasty using a 44- or 46-mm metal shell and a ceramic-on-ceramic bearing...
March 23, 2018: Orthopedics
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