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https://www.readbyqxmd.com/read/28097920/extending-the-life-cycle-of-reverse-osmosis-membranes-a-review
#1
Eduardo Coutinho de Paula, Míriam Cristina Santos Amaral
The reverse osmosis (RO) technology for desalination and demineralization serves the global water crisis context, both technically and economically, and its market is growing. However, RO membranes have a limited life-cycle and are often disposed of in landfills. The impacts caused by the disposal of thousands of tonnes per annum of RO membranes have grown dramatically around the world. Waste prevention should have a high priority and take effect before the end-of-life phase of a product is reached. In this review, a summary is presented of the main advances in the performance of the RO technology and the membrane lifespan...
January 1, 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28097682/evaluation-of-perforated-demineralized-dentin-scaffold-on-bone-regeneration-in-critical-size-sheep-iliac-defects
#2
Md Arafat Kabir, Masaru Murata, Toshiyuki Akazawa, Kaoru Kusano, Katsuhisa Yamada, Manabu Ito
OBJECTIVES: Regenerating critical-size bone injury is a major problem that continues to inspire the design of new graft materials. Therefore, tissue engineering has become a novel approach for targeting bone regeneration applications. Human teeth are a rich source of stem cells, matrix, trace metal ions, and growth factors. A vital tooth-derived demineralized dentin matrix is acid-insoluble and composed of cross-linked collagen with growth factors. In this study, we recycled human non-functional tooth into a unique geometric dentin scaffold, entitled perforated root-demineralized dentin matrix (PR-DDM)...
January 17, 2017: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/28079165/oriented-and-ordered-biomimetic-remineralization-of-the-surface-of-demineralized-dental-enamel-using-hap-acp-nanoparticles-guided-by-glycine
#3
Haorong Wang, Zuohui Xiao, Jie Yang, Danyang Lu, Anil Kishen, Yanqiu Li, Zhen Chen, Kehua Que, Qian Zhang, Xuliang Deng, Xiaoping Yang, Qing Cai, Ning Chen, Changhong Cong, Binbin Guan, Ting Li, Xu Zhang
Achieving oriented and ordered remineralization on the surface of demineralized dental enamel, thereby restoring the satisfactory mechanical properties approaching those of sound enamel, is still a challenge for dentists. To mimic the natural biomineralization approach for enamel remineralization, the biological process of enamel development proteins, such as amelogenin, was simulated in this study. In this work, carboxymethyl chitosan (CMC) conjugated with alendronate (ALN) was applied to stabilize amorphous calcium phosphate (ACP) to form CMC/ACP nanoparticles...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28064012/effect-of-a-novel-quaternary-ammonium-silane-on-dentin-protease-activities
#4
D Umer, C K Y Yiu, M F Burrow, L-N Niu, F R Tay
OBJECTIVES: Demineralized dentin collagen release C-terminal cross-linked telopeptide (ICTP) and C-terminal peptide (CTX) during degradation. The present study evaluated the effects of dentin pre-treatment with K21, a quaternary ammonium silane (QAS), on matrix metalloproteinase (MMP) and cathepsin K-mediated collagen degradation. METHODS: Dentin beams were demineralized with 10% H3PO4 for 24h. After baseline dry mass measurements, the beams were divided into 5 groups (N=10) according to protease inhibitors...
January 4, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28054260/effect-of-er-yag-laser-on-dentin-demineralization-around-restorations
#5
Michelle Alexandra Chinelatti, Cristiane Tomaz Rocha, Vivian Colucci, Mônica Campos Serra, Antonio Luiz Rodrigues-Júnior, Silmara Aparecida Milori Corona
The aim of this study was to evaluate the effect of cavity preparation with Er:YAG laser on dentin adjacent to restorations submitted to cariogenic challenge in situ, by subsuperficial microhardness analysis. Bovine incisors were sectioned, flattened, and polished, resulting in 40 dentin slabs. The slabs were randomly assigned to four groups (n = 10), according to the cavity preparation method: I-high-speed handpiece (control); II-Er:YAG laser (160 mJ; 3 Hz); III-Er:YAG laser (260 mJ; 3 Hz); IV-Er:YAG laser (300 mJ; 3Hz)...
January 4, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28052214/effect-of-silver-nanoparticle-added-pit-and-fissure-sealant-in-the-prevention-of-dental-caries-in-children
#6
Enid Karina Salas-López, Mauricio Pierdant-Pérez, Juan Francisco Hernández-Sierra, Facundo Ruíz, Peter Mandeville, Amaury J Pozos-Guillén
OBJECTIVE: The objective of this study was to evaluate the effects of pit and fissure sealant mixed with silver nanoparticles on dental caries, by means of monthly measurement of fluorescence with DIAGNOdent over six months. STUDY DESIGN: This study was divided in two phases: experimental and clinical. In the experimental phase, the adhesion and microleakage of the pit and fissure sealant experiment were evaluated. Two groups of 10 teeth, without serious carious lesions, were included...
2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28050982/effect-of-tannic-acid-on-bond-strength-of-etch-and-rinse-and-self-etch-adhesive-systems-in-dentin-of-primary-teeth
#7
Masoumeh Ebrahimi, Alireza Sarraf Shirazi, Faraneh Abdolhoseinpour, Mojtaba Abdollahi
INTRODUCTION: One of the possible mechanisms for the gradual destruction of bond strength in dentin-resin interface, could be due to the demineralized unstable collagen matrix. Use of protease inhibitors, such as tannic acid (TA) could prevent destruction of collagen fibers. The aim of this study was to compare the TA effect on bond strength of etch and rinse and self-etch adhesive systems in the dentin of primary teeth. MATERIALS AND METHODS: This in vitro study was done on 40 extracted primary molar teeth...
January 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28050319/the-hidden-x-suture-a-technical-note-on-a-novel-suture-technique-for-alveolar-ridge-preservation
#8
Jung-Chul Park, Ki-Tae Koo, Hyun-Chang Lim
PURPOSE: The present study investigated the impact of 2 different suture techniques, the conventional crossed mattress suture (X suture) and the novel hidden X suture, for alveolar ridge preservation (ARP) with an open healing approach. METHODS: This study was a prospective randomized controlled clinical trial. Fourteen patients requiring extraction of the maxillary or mandibular posterior teeth were enrolled and allocated into 2 groups. After extraction, demineralized bovine bone matrix mixed with 10% collagen (DBBM-C) was grafted and the socket was covered by porcine collagen membrane in a double-layer fashion...
December 2016: Journal of Periodontal & Implant Science
https://www.readbyqxmd.com/read/28043013/transient-receptor-potential-melastatin-trpm-8-is-expressed-in-freshly-isolated-native-human-odontoblasts
#9
Kento Tazawa, Hideharu Ikeda, Nobuyuki Kawashima, Takashi Okiji
OBJECTIVE: Cold-sensitive ion channels, such as transient receptor potential melastatin (TRPM) 8 and transient receptor potential ankyrin (TRPA) 1, may play a crucial role in the nociceptive function of odontoblasts, whereas expression of these TRP channels in human native odontoblasts remains to be elucidated. This study aimed to analyze the expression of TRPM8 and TRPA1 in freshly isolated native human odontoblasts. DESIGN: Odontoblasts were isolated from freshly extracted healthy human teeth (n=4); after removing the inner pulp tissues from the pulp chambers, odontoblasts remaining on the dentin surface were washed out with phosphate buffered saline and collected...
December 23, 2016: Archives of Oral Biology
https://www.readbyqxmd.com/read/28040589/production-of-demineralized-water-for-use-in-thermal-power-stations-by-advanced-treatment-of-secondary-wastewater-effluent
#10
Ioannis A Katsoyiannis, Petros Gkotsis, Massimo Castellana, Fabricio Cartechini, Anastasios I Zouboulis
The operation and efficiency of a modern, high-tech industrial full-scale water treatment plant was investigated in the present study. The treated water was used for the supply of the boilers, producing steam to feed the steam turbine of the power station. The inlet water was the effluent of municipal wastewater treatment plant of the city of Bari (Italy). The treatment stages comprised (1) coagulation, using ferric chloride, (2) lime softening, (3) powdered activated carbon, all dosed in a sedimentation tank...
December 29, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/28032049/the-efficiency-of-child-formula-dentifrices-containing-different-calcium-and-phosphate-compounds-on-artificial-enamel-caries
#11
Praphasri Rirattanapong, Kadkao Vongsavan, Chavengkiat Saengsirinavin, Ploychompoo Khumsub
OBJECTIVES: Fluoride toothpaste has been extensively used to prevent dental caries. However, the risk of fluorosis is concerning, especially in young children. Calcium phosphate has been an effective remineralizing agent and is present in commercial dental products, with no risk of fluorosis to users. This in vitro study aimed to compare the effects of different calcium phosphate compounds and fluoride-containing dentifrices on artificial caries in primary teeth. MATERIALS AND METHODS: Fifty sound primary incisors were coated with nail varnish, leaving two 1 mm(2) windows on the labial surface before immersion in demineralizing solution for 96 hours to produce artificial enamel lesions...
November 2016: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/28028985/using-an-electron-scanning-microscope-to-assess-the-penetrating-abilities-of-an-experimental-preparation-with-features-of-a-dental-infiltrant-preliminary-study
#12
Małgorzata Skucha-Nowak, Anna Mertas, Marta Tanasiewicz
BACKGROUND: The resin infiltration technique is one of the micro-invasive methods whose aim is the penetration of demineralized enamel with a low viscosity resin. This technique allows the dentist to avoid the application of mechanical means of treatment. OBJECTIVES: The objective of this preliminary study was to attempt to determine the possibilities of using an electron microscope to assess the penetrating abilities of an experimental preparation with features of a dental infiltrant and to compare the depth of infiltration of the designed experimental preparation with an infiltrant available on the market...
November 2016: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28028962/assessing-the-penetrating-abilities-of-experimental-preparation-with-dental-infiltrant-features-using-optical-microscope-preliminary-study
#13
Małgorzata Skucha-Nowak, Agnieszka Machorowska-Pieniążek, Marta Tanasiewicz
BACKGROUND: The aim of the infiltration technique is to penetrate demineralized enamel with a low viscosity resin. Icon® (DMG) is the first ever and so far the only dental infiltrant. Bacteriostaticity is one of the properties that should be inherent in dental infiltrants, but Icon lacks this feature. OBJECTIVES: The aim of the preliminary study was to properly choose a dye which would allow us to assess the penetrating abilities of our own, experimental preparation with features of a dental infiltrant with bacteriostatic properties and to compare using an optical microscope the depth of infiltration of the designed experimental preparation with the infiltrant available on the market...
September 2016: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28024641/poly-amido-amine-and-nano-calcium-phosphate-bonding-agent-to-remineralize-tooth-dentin-in-cyclic-artificial-saliva-lactic-acid
#14
Kunneng Liang, Michael D Weir, Mark A Reynolds, Xuedong Zhou, Jiyao Li, Hockin H K Xu
The objectives of this study were to develop a novel method to remineralize dentin lesions, and investigate the remineralization effects of poly (amido amine) (PAMAM) dendrimer plus a bonding agent with nanoparticles of amorphous calcium phosphate (NACP) in a cyclic artificial saliva/lactic acid environment for the first time. Dentin lesions were produced via phosphoric acid. Four groups were tested: (1) dentin control, (2) dentin with PAMAM, (3) dentin with NACP bonding agent, and (4) dentin with PAMAM plus NACP bonding agent...
March 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28007394/limited-interaction-of-a-self-adhesive-flowable-composite-with-dentin-enamel-characterized-by-tem
#15
Atsushi Mine, Jan De Munck, Annelies Van Ende, André Poitevin, Mariko Matsumoto, Yasuhiro Yoshida, Takuo Kuboki, Kirsten L Van Landuyt, Hirofumi Yatani, Bart Van Meerbeek
OBJECTIVES: A new category of composite which does not require any acid etching or bonding protocol prior to application has been introduced. The purpose of this study was to characterize the interfacial ultra-structure at enamel and dentin surfaces by means of transmission electron microscopy (TEM). METHODS: Non-carious human third molars were randomly divided into 6 groups (bur-cut dentin, SiC-ground dentin, fractured dentin, bur-cut enamel, SiC-ground enamel, and un-cut enamel)...
December 19, 2016: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28005380/hyaluronic-acid-hydroxyapatite-colloidal-gels-combined-with-micronized-native-ecm-as-potential-bone-defect-fillers
#16
S Connor Dennis, Jonathan Whitlow, Michael S Detamore, Sarah L Kieweg, Cory J Berkland
One of the grand challenges in translational regenerative medicine is the surgical placement of biomaterials. For bone regeneration in particular, malleable and injectable colloidal gelsare frequently designed to exhibit self-assembling and shear-response behavior which facilitates biomaterial placement in tissue defects. The current study demonstrated that by combining native extracellular matrix (ECM) microparticles, i.e., demineralized bone matrix (DBM) and decellularized cartilage (DCC), with hyaluronic acid (HA) and hydroxyapatite (HAP) nanoparticles, a viscoelastic colloidal gel consisting exclusively of natural materials was achieved...
December 22, 2016: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28003828/volar-locking-plate-breakage-after-nonunion-of-a-distal-radius-osteotomy
#17
Sergi Barrera-Ochoa, Sergi Rodríguez-Alabau, Andrea Sallent, Francisco Soldado, Xavier Mir
We report a 38-year-old male with a nonunion followed by plate breakage after volar plating of a distal radius osteotomy. Volar locking plates have added a new approach to the treatment of distal radius malunions, due to a lower morbidity of the surgical approach and the strength of the final construction, allowing early mobilization and return to function. Conclusion. Plate breakage is an uncommon complication of volar locking plate fixation. To our knowledge, few cases have been described after a distal radius fracture and no case has been described after a distal radius corrective osteotomy...
2016: Case Reports in Medicine
https://www.readbyqxmd.com/read/28002914/treatment-options-of-simple-bone-cysts-the-role-of-bone-substitutes-growth-factors-and-literature-review
#18
C Perisano, M A Rosa, F Donati, C Barone, G Maccauro
The solitary bone cyst is a typical tumor-like lesion of the immature skeleton, whose etio-pathogenesis is still unclear. The purpose of this work is to perform a review of the literature about the different surgical approaches focusing on the role of bone substitutes and growth factors. Literature analysis shows injection techniques of substances such as methylprednisolone, autologous bone marrow, demineralized bone matrix, calcium sulphate and surgical techniques that involve the resection and curettage associated with bone graft and/or intramedullary nailing...
October 2016: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/28002526/micro-ct-and-optical-microscopy-imagistic-investigations-of-root-canal-morphology
#19
Emanuela Lidia Crăciunescu, Marius Boariu, Ciprian IoniŢă, Daniela Maria Pop, Cosmin Sinescu, Mihai Romînu, Meda Lavinia NegruŢiu
Protecting the root's internal morphology is the first key toward the success of the endodontic treatment. Due to the vast diversity of endodontic space, it is difficult to visualize and to establish the shape and limits of the root canal, especially the morphology of apical area and lateral root canals. Optical microscopy is a classical imagistic investigation method, widely used along classical methods like radiographs that also offer limited information about root morphology and extension of decay. Micro-computed tomography (micro-CT), a modern imagistic investigation method can provide detailed three-dimensional reconstructions of root canal...
2016: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/27994793/bone-union-rate-following-instrumented-posterolateral-lumbar-fusion-comparison-between-demineralized-bone-matrix-versus-hydroxyapatite
#20
Woo Dong Nam, Jemin Yi
STUDY DESIGN: Retrospective study. PURPOSE: To compare the union rate of posterolateral lumbar fusion (PLF) using demineralized bone matrix (DBM) versus hydroxyapatite (HA) as bone graft extender. OVERVIEW OF LITERATURE: To our knowledge, there has been no clinical trial to compare the outcomes of DBM versus HA as a graft material for PLF. METHODS: We analyzed prospectively collected data from consecutive 79 patients who underwent instrumented PLF...
December 2016: Asian Spine Journal
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