scholarly journals SEM Comparison of Penetration in Artificial White Spots Lesion between an Infiltrant Resin and Two Adhesive Systems

2017 ◽  
Vol 07 (03) ◽  
pp. 147-157
Author(s):  
Ximena Zamorano ◽  
Vladimir Valenzuela ◽  
Alejandro Daniels ◽  
Agustín Iturain
Keyword(s):  
Adhesive Systems ◽  
White Spots ◽  
Infiltrant Resin

Tuberöse Sklerose: Erweiterung der Diagnostik durch MR-Tomographie und Computertomographie

1992 ◽  
Vol 31 (05) ◽  
pp. 192-198
Author(s):  
H. Henkes ◽  
J. Richter ◽  
A. Kretschmer ◽  
P. Benz ◽  
G. Brill ◽  
...  
Keyword(s):  
Tuberöse Sklerose ◽  
White Spots

ZusammenfassungEs wird über 10 Kinder und eine 22jährige Erwachsene mit tuberöser Sklerose berichtet. Neben der Erhebung des internistischen und neurologischen Status wurden die Patienten computer- und kernspintomographisch untersucht. Alle 10 Kinder hatten zerebrale Krampfanfälle, nur 8 Hautveränderungen (Adenoma sebaceum, white spots), 4 ein Rhabdomyom des Herzens, 4 Astrozytome der Retina und nur 4 wiesen die vollständige Trias der Erkrankung mit Epilepsie, Hautveränderungen und geistiger/körperlicher Entwicklungsverzögerung auf. Die erwachsene Patientin war an einer Abortivform der tuberösen Sklerose erkrankt und wurde durch beidseitige Angiomyolipome als einzige extrazerebrale Manifestation auffällig. Bei allen Patienten wurden Mark-/Rindentubera, Verkalkungen und subependymale Riesenzellastrozytome in der CT und der MRT des Gehirns gefunden. Die Hirngewebsveränderungen ließen sich in 4 Läsionstypen einteilen. Wegen der humangenetischen Beratung im Erkrankungsfall und der Erfassung der für die Symptome der Patienten zugrunde liegenden Erkrankung sollten alle Kinder mit Epilepsie und ebenso alle Patienten, bei denen die gesamte Trias der Erkrankung fehlt, MR-tomographisch untersucht werden.

West syndrome in identical twins with white spots

2005 ◽  
Vol 36 (02) ◽  
Author(s):  
O Debus ◽  
H Bosse ◽  
B Fiedler ◽  
G Kurlemann
Keyword(s):  
West Syndrome ◽  
Identical Twins ◽  
White Spots

Aus der Welt gefallen. Eine geographische Phantasie

2016 ◽  
Vol 7 (1) ◽  
pp. 143-160
Author(s):  
Wolfgang Struck
Keyword(s):  
19Th Century ◽  
Geographical Imagination ◽  
White Spots ◽  
The 19Th Century ◽  
Geographical Space

Während im 19. Jahrhundert die ›weißen Flecken‹ von den Landkarten verschwinden, erscheint eine eigentümliche Figur in der geographischen Imagination, die Figur eines Forschers, der verschollen ist. Das Verschwinden jedoch findet unter Beobachtung statt, es wird in Erzählungen und Karten organisiert, es schreibt sich in Protokolle ein, die das Verschwinden wahrnehmbar machen und zugleich die Wahrnehmung eines homogenen geographischen Raums und die Bedingungen seiner Repräsentation formieren. </br></br>While, during the 19th century, the ›white spots‹ disappear from the maps, a peculiar figure appears in the geographical imagination: the figure of a researcher who has been lost. However, the disappearance takes place under observation, it is organized in narratives and maps, it is inscribed in protocols that make the disappearance perceptible and simultaneously form the perception of a homogeneous geographical space and the conditions of its representation.

Two Adhesive Systems-effect on Adhesion to Tooth Structure

2019 ◽  
Vol 70 (7) ◽  
pp. 2608-2613
Author(s):  
Larisa Simona Deac ◽  
Kamel Earar ◽  
Adela Loredana Colceriu Burtea ◽  
Alexandra Stefania Berghe ◽  
Aurora Antoniac ◽  
...  
Keyword(s):  
Adhesive Systems ◽  
Hybrid Layer ◽  
Tooth Structure ◽  
Selective Etch ◽  
Etch And Rinse ◽  
Significant Difference ◽  
Wisdom Teeth ◽  
Group 2 ◽  
Self Etch ◽  
Group 1

This study evaluates and compares by dye penetration method and SEM photomicrographs the sealing obtained using two different classes of adhesive systems (etch-and-rinse and self-etch with selective etching) with SDR (Dentsply) bulk fill composite. 84 class V cavities were prepared on oral and vestibular face of 42 intact, freshly extracted wisdom teeth. The cavities were randomly divided in two groups and restored: Group 1 with prime &bond one select (Dentsply) and SDR (Dentsply) and Group 2 with prime&bond one Etch&Rinse (Dentsply) and SDR (Dentsply). Prime&bond one Select (Dentsply) is a single component adhesive and can be used in self etch mode, in selective enamel etch mode, or in etch-and-rinse mode. We chosen for this study the selective etch of the enamel mode. Prime&bond one Etch Rinse (Dentsply) is a universal etch-and-rinse one-bottle dental adhesive, designed to be used in two steps. The bulk fill composites are commonly used in modern dentistry due to their properties of low polymerization shrinkage and curing in layer of 4 mm depth, offering the practitioner a fast clinical procedure with good results. The results showed a good sealing at enamel and dentin margins with no statistically significant difference between adhesives, even though the mean of enamel infiltration was smaller for Group1. Furthermore the results show that there were differences between the two groups, for the infiltrations at the enamel, the values of microleakage being arithmetically higher for Group 1, but with no statistically difference between the two groups.SEM images showed for both groups a good adhesion surface with the tooth, but the hybrid layer of the total-etch adhesives is different from the hybrid layer formed by self etch adhesives, in terms of thickness, uniformity. In conclusion both adhesive systems have equivalent sealing qualities and can be successfully used with SDR.

Innovative Adhesive Systems for Dental Giomer Restorations

2018 ◽  
Vol 69 (10) ◽  
Author(s):  
Ioana Hodisan ◽  
Cristina Prejmerean ◽  
Tinca Buruiana ◽  
Doina Prodan ◽  
Loredana Colceriu ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Itaconic Acid ◽  
Adhesive System ◽  
Adhesive Systems ◽  
Substantial Agreement ◽  
Dye Penetration ◽  
Strong Adhesion ◽  
Innovative Materials ◽  
Dental Applications

The aim of this work was to reduce microleakage in giomer restorations by using innovative materials in both adhesive systems and light-cured dental giomer. Two adhesive systems with different primers were investigated. The innovative compounds in the primers were acrylic acid (AA)/itaconic acid (IA) copolymer modified with methacrylic groups and AA/IA/N-acryloyl-L-leucine copolymer grafted with methacrylic groups. In addition, the investigated new giomer G contains a pre-reacted glass based on the latter copolymer. The commercial Beautifil II giomer and the FL-Bond II adhesive system were used for comparison. Microleakage was evaluated by determining the scores and percentages of dye penetration lengths after thermocycling of a series of light-cured dental giomer restorations performed on 42 premolars extracted for orthodontic reasons. A lower microleakage value was recorded for the adhesive system containing the AA/IA/N-acryloyl-L-leucine copolymer grafted with methacrylic groups than for the commercial adhesive, which was in substantial agreement with SEM and AFM investigations. In this case, remarkable dentin sealing and a strong adhesion at the giomer restoration�tooth interface was observed, and the innovative adhesive was proven to be promising for dental applications.

scholarly journals LeLePhid: An Image Dataset for Aphid Detection and Infestation Severity on Lemon Leaves

Data ◽  
2021 ◽  
Vol 6 (5) ◽  
pp. 51
Author(s):  
Jorge Parraga-Alava ◽  
Roberth Alcivar-Cevallos ◽  
Jéssica Morales Carrillo ◽  
Magdalena Castro ◽  
Shabely Avellán ◽  
...  
Keyword(s):  
Image Segmentation ◽  
Plant Disease ◽  
Automatic Identification ◽  
Health State ◽  
Classification Problems ◽  
Affected Area ◽  
White Spots ◽  
The World ◽  
Image Dataset ◽  
Plant Sap

Aphids are small insects that feed on plant sap, and they belong to a superfamily called Aphoidea. They are among the major pests causing damage to citrus crops in most parts of the world. Precise and automatic identification of aphids is needed to understand citrus pest dynamics and management. This article presents a dataset that contains 665 healthy and unhealthy lemon leaf images. The latter are leaves with the presence of aphids, and visible white spots characterize them. Moreover, each image includes a set of annotations that identify the leaf, its health state, and the infestation severity according to the percentage of the affected area on it. Images were collected manually in real-world conditions in a lemon plant field in Junín, Manabí, Ecuador, during the winter, by using a smartphone camera. The dataset is called LeLePhid: lemon (Le) leaf (Le) image dataset for aphid (Phid) detection and infestation severity. The data can facilitate evaluating models for image segmentation, detection, and classification problems related to plant disease recognition.

scholarly journals Adhesive Resins with High Shelf-Life Stability Based on Tetra Unsaturated Monomers with Tertiary Amines Moieties

Polymers ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1944
Author(s):  
Alma Antonia Pérez-Mondragón ◽  
Carlos Enrique Cuevas-Suárez ◽  
Jesús García-Serrano ◽  
Nayely Trejo-Carbajal ◽  
A. Lobo-Guerrero ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Double Bond ◽  
Shelf Life ◽  
Polymerization Rate ◽  
Tertiary Amines ◽  
Adhesive Systems ◽  
Double Bond Conversion ◽  
Initiator System ◽  
Ft Ir ◽  
Shelf Life Stability

This work reports the use of two monomers with two tertiary amines and four methacrylic (TTME) or acrylic (TTAC) terminal groups as co-initiators in the formulation of experimental resin adhesive systems. Both monomers were characterized by FT-IR and 1H NMR spectroscopies. The control adhesive was formulated with BisGMA, TEGDMA, HEMA, and the binary system CQ-EDAB as a photo-initiator system. For the experimental adhesives, the EDAB was completely replaced for the TTME or the TTAC monomers. The adhesives formulated with TTME or TTAC monomers achieved double bond conversion values close to 75%. Regarding the polymerization rate, materials formulated with TTME or TTAC achieved lower values than the material formulated with EDAB, giving them high shelf-life stability. The degree of conversion after shelf simulation was only reduced for the EDAB material. Ultimate tensile strength, translucency parameter, and micro-tensile bond strength to dentin were similar for control and experimental adhesive resins. Due to their characteristics, TTME and TTAC monomers are potentially useful in the formulation of photopolymerizable resins for dental use with high shelf-life stability.

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