Read by QxMD icon Read


Anna Akkus, Shan Yang, Renato Roperto, Hathem Mustafa, Sorin Teich, Ozan Akkus
BACKGROUND: Measurement of tooth enamel mineralization using a clinically viable method is essential since variation of mineralization may be used to monitor caries risk or in assessing the effectiveness of remineralization therapy. Fiber optic Raman systems are becoming more affordable and popular in context of biomedical applications. However, the applicability of fiber optic Raman systems for measurement of mineral content within enamel tissue has not been elucidated significantly in the prior literature...
February 2017: Journal of Clinical and Experimental Dentistry
Aswin Saseendran Nair, R Krishna Kumar, Sunil Thomas Philip, Syed Shaheed Ahameed, Sairaj Punnathara, Joby Peter
INTRODUCTION: The tug of war to maintain tooth integrity is dependent on a ratio between demineralization and remineralization. Hence, demineralization should be retarded and remineralization should be enhanced to maintain a natural equilibrium in the oral cavity. AIM: To compare in-vitro acid resistance of human enamel when using Casein Phosphopeptides Amorphous Calcium Phosphate (CPP-ACP) [GC Tooth mousse] cream, Casein Phosphopeptide Amorphous Calcium Fluoride Phosphate (CPP-ACFP) [GC Tooth mousse plus] cream, Er:YAG laser alone, combination of CPP-ACP with Er:YAG laser, CPP-ACFP with Er:YAG laser...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
Lou Barbe, Vincent Jung, Andreas Prinzing, Anne-Kristel Bittebiere, Olaf Butenschoen, Cendrine Mony
Plant litter decomposition is a key regulator of nutrient recycling. In a given environment, decomposition of litter from a focal species depends on its litter quality and on the efficiency of local decomposers. Both may be strongly modified by functional traits of neighboring species, but the consequences for decomposition of litter from the focal species remain unknown. We tested whether decomposition of a focal plant's litter is influenced by the functional-trait dissimilarity to the neighboring plants. We cultivated two grass species (Brachypodium pinnatum and Elytrigia repens) in experimental mesocosms with functionally similar and dissimilar neighborhoods, and reciprocally transplanted litter...
February 16, 2017: New Phytologist
Martin Sperling, Judith Piontek, Anja Engel, Karen H Wiltshire, Jutta Niggemann, Gunnar Gerdts, Antje Wichels
Carbohydrates represent an important fraction of labile and semi-labile marine organic matter that is mainly comprised of exopolymeric substances derived from phytoplankton exudation and decay. This study investigates the composition of total combined carbohydrates (tCCHO; >1 kDa) and the community development of free-living (0.2-3 μm) and particle-associated (PA) (3-10 μm) bacterioplankton during a spring phytoplankton bloom in the southern North Sea. Furthermore, rates were determined for the extracellular enzymatic hydrolysis that catalyzes the initial step in bacterial organic matter remineralization...
2017: Frontiers in Microbiology
T De Caluwé, C W J Vercruysse, I Ladik, R Convents, H Declercq, L C Martens, R M H Verbeeck
OBJECTIVES: Glass ionomer cements (GICs) are a subject of research because of their inferior mechanical properties, despite their advantages such as fluoride release and direct bonding to bone and teeth. Recent research aims to improve the bioactivity of the GICs and thereby improve mechanical properties on the long term. In this study, two types of bioactive glasses (BAG) (45S5F and CF9) are combined with GICs to evaluate the physico-chemical properties and biocompatibility of the BAG-GIC combinations...
February 10, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
Don Jeevanie Epasinghe, Stephen Kwan, Dora Chu, May Mei Lei, Michael Frances Burrow, Cynthia Kar Yung Yiu
BACKGROUND: Proanthocyanidin has been shown to enhance dentine collagen stability and remineralization of artificial root caries. OBJECTIVES: To evaluate the effect of proanthocyanidin (PA) in combination with tri-calcium phosphate (TCP) and fluoride (F) on resistance to collagen degradation and remineralization of artificial caries lesions. METHODS: Demineralized root fragments (n=75) were randomly divided into five groups based on treatments: (i) 6...
April 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
Songlin Liu, Zhijian Jiang, Yunchao Wu, Jingping Zhang, Iman Arbi, Feng Ye, Xiaoping Huang, Peter Ian Macreadie
Nutrient loading is a leading cause of global seagrass decline, triggering shifts from seagrass- to macroalgal-dominance. Within seagrass meadows of Xincun Bay (South China Sea), we found that nutrient loading (due to fish farming) increased sediment microbial biomass and extracellular enzyme activity associated with carbon cycling (polyphenol oxidase, invertase and cellulase), with a corresponding decrease in percent sediment organic carbon (SOC), suggesting that nutrients primed microorganism and stimulated SOC remineralization...
February 5, 2017: Marine Pollution Bulletin
Christopher S Kovacs
During lactation, mammals resorb mineral from the maternal skeleton to provide calcium to milk. Rodents lose 25-35% of skeletal ash weight, ash calcium content, and bone mineral content by DXA, and have compromised material properties of bone, as assessed by crushing vertebrae and 3-pt bend tests of femora or tibiae. The strength, stiffness, and toughness of vertebrae, femora, and tibiae are reduced by as much as 60%. The effects of lactation are not uniform throughout the skeleton, but instead resorption is much more marked in the trabecular-rich spine than in the appendicular skeleton or whole body...
February 8, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
Min Han, Quan-Li Li, Ying Cao, Hui Fang, Rong Xia, Zhi-Hong Zhang
A novel agarose hydrogel biomimetic mineralization system loaded with calcium and phosphate was used to remineralize dentin and induce the oriented densely parallel packed HA layer on defective dentin surface in vivo in a rabbit model. Firstly, the enamel of the labial surface of rabbits' incisor was removed and the dentin was exposed to oral environment. Secondly, the hydrogel biomimetic mineralization system was applied to the exposed dentin surface by using a custom tray. Finally, the teeth were extracted and evaluated by scanning electron microscopy, X-ray diffraction, and nanoindentation test after a certain time of mineralization intervals...
February 7, 2017: Scientific Reports
Manuel Toledano, Raquel Osorio, Estrella Osorio, Antonio Luis Medina-Castillo, Manuel Toledano-Osorio, Fátima S Aguilera
The aim of this study was to evaluate changes in the mechanical and chemical behavior, and bonding ability at dentin interfaces infiltrated with polymeric nanoparticlesstandard deviations and modes of failure are (NPs) prior to resin application. Dentin surfaces were treated with 37% phosphoric acid followed by application of an ethanol suspension of NPs, Zn-NPs or Ca-NPs followed by the application of an adhesive, Single Bond (SB). Bonded interfaces were stored for 24h, submitted to microtensile bond strength test, and evaluated by scanning electron microscopy...
January 25, 2017: Journal of the Mechanical Behavior of Biomedical Materials
Carolina E C Lins, Agda A R Oliveira, Ismael Gonzalez, Waldemar A A Macedo, Marivalda M Pereira
In the last decades, studies about the specific effects of bioactive glass on remineralization of dentin were the focus of attention, due to their excellent regenerative properties in mineralized tissues. The incorporation of Fluorine in bioactive glass nanoparticles may result in the formation of fluorapatite (FAP), which is chemically more stable than hydroxyapatite or carbonated hydroxyapatite, and therefore is of interest for dental applications. The aim of this study was to synthesize and characterize a new system of Fluorine-containing bioactive glass nanoparticles (BGNPF)...
February 2, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
Claudio Poggio, Chiara Gulino, Maria Mirando, Marco Colombo, Giampiero Pietrocola
BACKGROUND: The aim of the present study was to test the impact of different toothpastes with Zinc-Hydroxyapatite (Zn-HAP) on preventing and repairing enamel erosion compared to toothpastes with and without fluoride. MATERIAL AND METHODS: The following four toothpastes were tested: two toothpastes with Zn-HAP, one toothpaste with fluoride and one toothpaste without fluoride. An additional control group was used in which enamel specimens were not treated with toothpaste...
January 2017: Journal of Clinical and Experimental Dentistry
Gholam H Ramezani, Mona-Momeni Moghadam, Mohammad-Ali Saghiri, Franklin Garcia-Godoy, Armen Asatourian, Mohsen Aminsobhani, Mark Scarbecz, Nader Sheibani
BACKGROUND: To evaluate the effect of dental amalgam and composite restorations on total antioxidant capacity (TAC) and calcium (Ca) ion concentration of unstimulated saliva. MATERIAL AND METHODS: Forty-eight children aged 6-10 years selected and divided into three groups of sixteen (8 males, 8 females). In group A and B, samples consisted of two class II dental composite or amalgam restorations, while in group C samples were caries-free (control group). Unstimulated saliva from all samples was collected and TAC was measured by spectrophotometry using an adaptation of 2, 2'-azino-di-(3-ethylbenzthiazoline-6-sulphonate) (ABTS) assay...
January 2017: Journal of Clinical and Experimental Dentistry
Manuel Toledano, Raquel Osorio, Inmaculada Cabello, Estrella Osorio, Manuel Toledano-Osorio, Fátima S Aguilera
The aim of this study was to investigate if load cycling affects interfacial integrity of glass ionomer cements bonded to sound- or caries-affected dentin. A conventional glass ionomer, Ketac Bond, and a resin-modified glass ionomer (Vitrebond Plus), were applied to dentin. Half of the specimens were load cycled. The interfaces were submitted to dye-assisted confocal microscopy evaluation. The unloaded specimens of sound and carious dentin were deficiently hybridized when Ketac Bond was used. Ketac Bond samples showed an absorption layer and an adhesive layer that were scarcely affected by fluorescein penetration (nanoleakage), in sound dentin...
February 2, 2017: Microscopy and Microanalysis
Naohiko Kawamura, Masahiro Iijima, Shuich Ito, William A Brantley, Satish B Alapati, Takeshi Muguruma, Kyotaro Kawaguchi, Takashi Saito, Itaru Mizoguchi
In this study, wear and inhibition of enamel demineralization by resin-based coating materials were investigated. Seven commercially available coating materials, with and without fillers, were used. A mechanical wear test was performed, and the specimens were then examined with a scanning electron microscope. Hardness and elastic modulus measurements for each material were obtained by nanoindentation testing. Thin layers of each material were applied on human enamel surfaces, which were subjected to alternating immersion in demineralizing and remineralizing solutions...
February 1, 2017: European Journal of Oral Sciences
Navneet Grewal, Samita Gumber, Nirapjeet Kaur
BACKGROUND: Enamel remineralization potential of variety of products has been established, but there is a lack of evidence of comparison of remineralization potential of natural versus synthetic products. AIM: The aim of this study was to compare the enamel remineralization potential of saliva, cheese, casein phosphopeptide-amorphous calcium phosphate (CPP-ACP)-based synthetic agent, and fluoride toothpaste. DESIGN: In situ study was carried out on sixty individuals who wore an intraoral appliance containing demineralized enamel slabs for each agent...
January 2017: Journal of the Indian Society of Pedodontics and Preventive Dentistry
Diane R Bienek, Wojtek Tutak, Drago Skrtic
Bioactive polymeric materials based on calcium phosphates have tremendous appeal for hard tissue repair because of their well-documented biocompatibility. Amorphous calcium phosphate (ACP)-based ones additionally protect against unwanted demineralization and actively support regeneration of hard tissue minerals. Our group has been investigating the structure/composition/property relationships of ACP polymeric composites for the last two decades. Here, we present ACP's dispersion in a polymer matrix and the fine-tuning of the resin affects the physicochemical, mechanical, and biological properties of ACP polymeric composites...
January 26, 2017: Journal of Functional Biomaterials
Sarika Naidu, Shobha Tandon, Rashmi Nayak, P Venkat Ratnanag, Deepesh Prajapati, Namitha Kamath
AIM: To assess the effect of combined use of chlorhexidine and fluoride varnish on the remineralization of incipient carious lesions in young children. MATERIALS AND METHODS: Twenty caries-active children (80 lesions) were randomly divided into four groups and subjected to initial examination. Caries status was assessed visually and with the aid of DIAGNOdent. Baseline enamel biopsies were obtained. Subjects of groups I and II received fluoride and chlorhexidine varnish respectively...
October 2016: International Journal of Clinical Pediatric Dentistry
Noha A El-Wassefy
This study investigated the combining effect of cold plasma and bioglass-phosphoric acid paste on demineralized enamel. Fifty bovine incisors' enamel specimens were challenged by a demineralization solution of pH 4.47 for 72 h. Specimens were divided into five groups: (I) Control, demineralized enamel (C); (II) Demineralized enamel treated with fluoride varnish (F); (III) Cold plasma application to demineralized enamel (P); (IV) Demineralized enamel treated with bioglass paste (B); (V) Application of bioglass paste to cold plasma-treated demineralized enamel (PB)...
January 20, 2017: Dental Materials Journal
Visnja Katic, Lidija Curkovic, Magdalena Ujevic Bosnjak, Kristina Peros, Davor Mandic, Stjepan Spalj
Aim was to determine effect of pH, fluoride (F(-)) and hydrofluoric acid concentration (HF) on dynamic of nickel (Ni(2+)) and titanium (Ti(4+)) ions release. Nickel-titanium wires with untreated surface (NiTi), rhodium (RhNiTi) and nitride (NNiTi) coating were immersed once a week for five min in remineralizing agents, followed by immersion to artificial saliva. Ion release was recorded after 3, 7, 14, 21 and 28 days. Pearson correlations and linear regression were used for statistical analysis. Release of Ni(2+) from NiTi and NNiTi wires correlated highly linearly positively with HF (r=0...
January 20, 2017: Dental Materials Journal
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"