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https://www.readbyqxmd.com/read/28110070/mesoscale-porosity-at-the-dentin-enamel-junction-could-affect-the-biomechanical-properties-of-teeth
#1
Elsa Vennat, Wenlong Wang, Rachel Genthial, Bertrand David, Elisabeth Dursun, Aurélien Gourrier
: In this paper, the 3D-morphology of the porosity in dentin is investigated within the first 350 μm from the dentin-enamel junction (DEJ) by fluorescence confocal laser scanning microscopy (CLSM). We found that the porous microstructure exhibits a much more complex geometry than classically described, which may impact our fundamental understanding of the mechanical behavior of teeth and could have practical consequences for dental surgery. Our 3D observations reveal numerous fine branches stemming from the tubules which may play a role in cellular communication or mechanosensing during the early stages of dentinogenesis...
January 18, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28109300/knowledge-attitudes-and-practices-in-tamarind-tamarindus-indica-l-use-and-conservation-in-eastern-uganda
#2
Esther Ebifa-Othieno, Antony Mugisha, Philip Nyeko, John David Kabasa
BACKGROUND: Tamarindus indica L is one of the indigenous fruit tree species that traditionally contributes to food security and ecosystem stability in sub-Saharan Africa. We hypothesized that the indigenous people of Eastern Uganda have used T. indica for generations and developed practices that promote its conservation and therefore we expected that they possess an elaborate indigenous knowledge (IK) system and that most of them have planted the species. The aim of this study was to assess the influence of IK, attitudes and practices on the use and conservation of T...
January 21, 2017: Journal of Ethnobiology and Ethnomedicine
https://www.readbyqxmd.com/read/28109162/odontoblastic-differentiation-of-dental-pulp-stem-cells-from-healthy-and-carious-teeth-on-an-original-pcl-based-3d-scaffold
#3
A Louvrier, E Euvrard, L Nicod, G Rolin, F Gindraux, L Pazart, C Houdayer, P Y Risold, F Meyer, C Meyer
AIMS: To isolate and characterize Dental Pulp Stem Cells (DPSCs) obtained from carious and healthy mature teeth extracted when conservative treatment was not possible or for orthodontic reasons; to evaluate the ability of DPSCs to colonize, proliferate, and differentiate into functional odontoblast-like cells when cultured onto a polycaprolactone cone made by jet-spraying and prototyped into a design similar to a gutta-percha cone. METHODOLOGY: DPSCs were obtained from 9 carious and 12 healthy mature teeth...
January 21, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28109118/a-mandible-from-the-middle-pleistocene-hexian-site-and-its-significance-in-relation-to-the-variability-of-asian-homo-erectus
#4
Wu Liu, María Martinón-Torres, Yousuke Kaifu, Xiujie Wu, Reiko T Kono, Chun-Hsiang Chang, Pianpian Wei, Song Xing, Wanbo Huang, José María Bermúdez de Castro
OBJECTIVES: This study presents the first detailed morphological description and comparison of a Middle Pleistocene hominin mandibular fragment (PA 831) and associated teeth from the Hexian site in Eastern China. We aim to investigate where the Hexian mandible fits within the genus Homo variability in the light of an increased and better characterized Asian fossils record. METHODS: Comparative samples include Pleistocene Homo mandibles and teeth from Africa, Asia, and Europe, as well as earlier African hominins (Australopithecus and early Homo) and Holocene recent humans...
January 21, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28106715/seasonal-effects-on-the-population-morphology-and-reproductive-behavior-of-narnia-femorata-hemiptera-coreidae
#5
Lauren A Cirino, Christine W Miller
Many insects are influenced by the phenology of their host plants. In North Central Florida, Narnia femorata (Hemiptera: Coreidae) spends its entire life cycle living and feeding on Opuntia mesacantha ssp. lata. This cactus begins producing flower buds in April that lead to unripe green fruit in June that ripen into red fruit through December. Many morphological and behavioral characteristics of N. femorata are known to be affected by cactus phenology in a controlled laboratory setting, including the degree of sexual dimorphism and mating behavior...
January 17, 2017: Insects
https://www.readbyqxmd.com/read/28106508/gelma-encapsulated-hdpscs-and-huvecs-for-dental-pulp-regeneration
#6
A Khayat, N Monteiro, E E Smith, S Pagni, W Zhang, A Khademhosseini, P C Yelick
Pulpal revascularization is commonly used in the dental clinic to obtain apical closure of immature permanent teeth with thin dentinal walls. Although sometimes successful, stimulating bleeding from the periapical area of the tooth can be challenging and in turn may deleteriously affect tooth root maturation. Our objective here was to define reliable methods to regenerate pulp-like tissues in tooth root segments (RSs). G1 RSs were injected with human dental pulp stem cells (hDPSCs) and human umbilical vein endothelial cells (HUVECs) encapsulated in 5% gelatin methacrylate (GelMA) hydrogel...
February 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28106505/pulp-vascularization-during-tooth-development-regeneration-and-therapy
#7
C Rombouts, T Giraud, C Jeanneau, I About
The pulp is a highly vascularized tissue situated in an inextensible environment surrounded by rigid dentin walls, with the apical foramina being the only access. The pulp vascular system is not only responsible for nutrient supply and waste removal but also contributes actively to the pulp inflammatory response and subsequent regeneration. This review discusses the underlying mechanisms of pulp vascularization during tooth development, regeneration, and therapeutic procedures, such as tissue engineering and tooth transplantation...
February 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28106205/synbiotic-amazonian-palm-berry-a%C3%A3-ai-euterpe-oleracea-mart-ice-cream-improved-lactobacillus-rhamnosus-gg-survival-to-simulated-gastrointestinal-stress
#8
Mayra Garcia Maia Costa, Gabriela Namur Ooki, Antônio Diogo Silva Vieira, Raquel Bedani, Susana Marta Isay Saad
The effect of açai pulp ice cream and of its supplementation with inulin (I), whey protein concentrate (WC), and/or whey protein isolate (WI) on the viability and resistance to simulated gastrointestinal stress of the probiotic Lactobacillus (Lb.) rhamnosus GG strain throughout storage at -18 °C for up to 112 days was evaluated and morphological changes during stress were monitored. Lb. rhamnosus GG viability was stable in all formulations for up to 112 days of storage, preserving populations around 9 log CFU g(-1)...
January 20, 2017: Food & Function
https://www.readbyqxmd.com/read/28105979/human-dental-pulp-stem-cells-are-more-effective-than-human-bone-marrow-derived-mesenchymal-stem-cells-in-cerebral-ischemic-injury
#9
Miyeoun Song, Jae-Hyung Lee, Jinhyun Bae, Youngmin Bu, Eun-Cheol Kim
We compared the therapeutic effects and mechanism of transplanted human dental pulp stem cells (hDPSCs) and human bonemarrow-derived mesenchymal stem cells (hMSCs) in a stroke model of rats and an <i>in vitro</i> ischemic model. Both hDPSCs- and hMSCs- intravenously injected rats 24&#8201;h after middle cerebral artery occlusion showed improved functional recovery and reduced infarct volume versus control rats, but the hDPSCs group showed greater reduction in infarct volume than hMSCs. The positive area for the endothelial cell marker was greater in the lesion boundary areas in the hDPSCs group than with hMSCs...
January 20, 2017: Cell Transplantation
https://www.readbyqxmd.com/read/28102011/local-myogenic-pulp-derived-cell-injection-enhances-craniofacial-muscle-regeneration-in-vivo
#10
J E Jung, M J Song, S Shin, Y J Choi, K H Kim, C J Chung
OBJECTIVES: To enhance myogenic differentiation in pulp cells isolated from extracted premolars by epigenetic modification using a DNA demethylation agent, 5-aza-2'-deoxycytidine (5-Aza), and to evaluate the potent stimulatory effect of 5-Aza-treated pulp cell injection for craniofacial muscle regeneration in vivo. SETTING AND SAMPLE POPULATION: Pulp cells were isolated from premolars extracted for orthodontic purposes from four adults (age range, 18-22.1 years)...
February 2017: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/28100415/a-10-year-trend-of-dental-treatments-under-general-anesthesia-of-children-in-taipei-veterans-general-hospital
#11
Yung-Pan Chen, Chun-Yi Hsieh, Wen-Ting Hsu, Fu-Ya Wu, Wen-Yu Shih
BACKGROUND: General anesthesia (GA) as a pediatric dental procedure is a well-established method of behavior management. However, studies of pediatric dentistry under GA have mostly focused on handicapped patients, and various retrospective studies in Taiwan have mainly reviewed only a limited number of years. The purpose of the present study was to report trends in pediatric dental treatment performed under GA over the past 10 years. METHODS: A retrospective review of the hospital records of patients receiving dental treatment under GA from 2006 until 2015 was performed...
January 16, 2017: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/28098169/ifn-%C3%AE-regulates-human-dental-pulp-stem-cells-behavior-via-nf-%C3%AE%C2%BAb-and-mapk-signaling
#12
Xinyao He, Wenkai Jiang, Zhirong Luo, Tiejun Qu, Zhihua Wang, Ningning Liu, Yaqing Zhang, Paul R Cooper, Wenxi He
During caries, dental pulp expresses a range of pro-inflammatory cytokines in response to the infectious challenge. Interferon gamma (IFN-γ) is a dimerized soluble cytokine, which is critical for immune responses. Previous study has demonstrated that IFN-γ at relative high concentration (100 ng/mL) treatment improved the impaired dentinogenic and immunosuppressive regulatory functions of disease-derived dental pulp stem cells (DPSCs). However, little is known about the regulatory effects of IFN-γ at relative low concentration on healthy DPSC behavior (including proliferation, migration, and multiple-potential differentiation)...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28097682/evaluation-of-perforated-demineralized-dentin-scaffold-on-bone-regeneration-in-critical-size-sheep-iliac-defects
#13
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/28097666/understanding-external-cervical-resorption-patterns-in-endodontically-treated-teeth
#14
M Mavridou, E Hauben, M Wevers, E Schepers, L Bergmans, P Lambrechts
AIM: To understand the pattern of external cervical resorption (ECR) in endodontically treated teeth. To compare characteristics and mechanisms of ECR in root filled teeth with those established in teeth with vital pulps. METHODOLOGY: Seven cases of endodontically treated permanent teeth displaying ECR were investigated. ECR diagnosis was based on clinical findings and radiographic examination with cone-beam computed tomography (CBCT). The extracted teeth were further analysed by a nano-focus computed tomographic (nano-CT) system, hard tissue histology and scanning electron microscopy (SEM)...
January 18, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28096669/nanocoating-with-plant-derived-pectins-activates-osteoblast-response-in-vitro
#15
J Folkert, A Meresta, T Gaber, K Miksch, F Buttgereit, J Detert, N Pischon, K Gurzawska
A new strategy to improve osseointegration of implants is to stimulate adhesion of bone cells, bone matrix formation, and mineralization at the implant surface by modifying surface coating on the nanoscale level. Plant-derived pectins have been proposed as potential candidates for surface nanocoating of orthopedic and dental titanium implants due to 1) their osteogenic stimulation of osteoblasts to mineralize and 2) their ability to control pectin structural changes. The aim of this study was to evaluate in vitro the impact of the nanoscale plant-derived pectin Rhamnogalacturonan-I (RG-I) from potato on the osteogenic response of murine osteoblasts...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28096391/network-based-integration-of-systems-genetics-data-reveals-pathways-associated-with-lignocellulosic-biomass-accumulation-and-processing
#16
Eshchar Mizrachi, Lieven Verbeke, Nanette Christie, Ana C Fierro, Shawn D Mansfield, Mark F Davis, Erica Gjersing, Gerald A Tuskan, Marc Van Montagu, Yves Van de Peer, Kathleen Marchal, Alexander A Myburg
As a consequence of their remarkable adaptability, fast growth, and superior wood properties, eucalypt tree plantations have emerged as key renewable feedstocks (over 20 million ha globally) for the production of pulp, paper, bioenergy, and other lignocellulosic products. However, most biomass properties such as growth, wood density, and wood chemistry are complex traits that are hard to improve in long-lived perennials. Systems genetics, a process of harnessing multiple levels of component trait information (e...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28095448/distribution-of-cathepsin-k-in-late-stage-of-tooth-germ-development-and-its-function-in-degrading-enamel-matrix-proteins-in-mouse
#17
Tao Jiang, Fen Liu, Wei-Guang Wang, Xin Jiang, Xuan Wen, Kai-Jin Hu, Yang Xue
Cathepsin K (CTSK) is a member of cysteine proteinase family, and is predominantly expressed in osteoclastsfor degradationof bone matrix proteins. Given the similarity in physical properties of bone and dental mineralized tissues, including enamel, dentin and cementum, CTSK is likely to take part in mineralization process during odontogenesis. On the other hand, patients with pycnodysostosis caused by mutations of the CTSK gene displayedmultipledental abnormalities, such as hypoplasia of the enamel, obliterated pulp chambers, hypercementosis and periodontal disease...
2017: PloS One
https://www.readbyqxmd.com/read/28094929/effect-of-in-vitro-gastrointestinal-digestion-on-encapsulated-and-nonencapsulated-phenolic-compounds-of-carob-ceratonia-siliqua-l-pulp-extracts-and-their-antioxidant-capacity
#18
Siham Ydjedd, Sihem Bouriche, Rubén López-Nicolás, Teresa Sánchez-Moya, Carmen Frontela-Saseta, Gaspar Ros-Berruezo, Farouk Rezgui, Hayette Louaileche, Djamel-Edine Kati
To determine the effect of in vitro gastrointestinal digestion on the release and antioxidant capacity of encapsulated and nonencapsulated phenolics carob pulp extracts, unripe and ripe carob pulp extracts were microencapsulated with polycaprolactone via double emulsion/solvent evaporation technique. Microcapsules' characterization was performed using scanning electron microscopy and Fourier transform infrared spectrometry analysis. Total phenolics and flavonoids content and antioxidant activities (ORAC, DPPH, and FRAP) were evaluated after each digestion step...
January 17, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28092423/-1-h-qnmr-quantification-of-annonaceous-acetogenins-in-crude-extracts-of-annona-muricata-l-fruit-pulp
#19
Natacha Bonneau, Timothé Cynober, Jean-Christophe Jullian, Pierre Champy
INTRODUCTION: Annonaceous acetogenins (AAGs) constitute a group of environmental neurotoxins, possibly implicated in sporadic atypical Parkinsonism/dementia complexes. The recent evidencing of complex mixtures of AAGs in edible fruits and derived food products requires efficient and practical analytical tools for an estimation of human exposure. OBJECTIVE: To develop a simple method for the direct quantitation of the majority of AAGs (sub-types 1a and 1b) within crude extracts, using commonly available (1) H-NMR spectrometers, for food control...
January 16, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28091877/influence-of-enamel-dentin-thickness-on-the-toxic-and-esthetic-effects-of-experimental-in-office-bleaching-protocols
#20
C C de Oliveira Duque, D G Soares, F G Basso, J Hebling, C A de Souza Costa
OBJECTIVES: This paper aims to assess the whitening effectiveness and toxicity of tooth-bleaching protocols applied to enamel/dentin disks simulating mandibular incisors (ICs) and premolars (PMs). MATERIALS AND METHODS: A 10% hydrogen peroxide (H2O2) gel was applied for 3 × 15, 1 × 15, or 1 × 5 min to enamel/dentin disks simulating mandibular ICs and PMs, and the trans-enamel and trans-dentinal diffusion products were applied to human dental pulp cells (1 h)...
January 14, 2017: Clinical Oral Investigations
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