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https://www.readbyqxmd.com/read/28094232/comparative-evaluation-of-shear-bond-strength-of-metallic-brackets-bonded-with-two-different-bonding-agents-under-dry-conditions-and-with-saliva-contamination
#1
Mashallah Khanehmasjedi, Mohammad Ali Naseri, Samaneh Khanehmasjedi, Leila Basir
BACKGROUND: This study compared the shear bond strength of metallic brackets bonded with Single Bond and Assure bonding agents under dry and saliva-contamination conditions. METHODS: Sixty sound premolar teeth were selected, and stainless-steel brackets were bonded on enamel surfaces with Single Bond and Assure bonding agents under dry condition or with saliva contamination. Shear bond strength values of brackets were measured in a universal testing machine. The adhesive remnant index scores were determined after debonding of the brackets under a stereomicroscope...
January 13, 2017: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/28091875/the-effect-of-veneering-on-the-marginal-fit-of-cad-cam-generated-copy-milled-and-cast-metal-copings
#2
Sabit Melih Ates, Zeynep Yesil Duymus, Ipek Caglar, Bilal Hologlu
OBJECTIVE: This in vitro study investigated the marginal fit of metal and zirconia copings before and after veneering on dies with shoulder/chamfer (s/c) finish lines. MATERIALS AND METHODS: Using CAD/CAM, ten (n = 10) each s/c zirconia (NZ) copings and ten (n = 10) each s/c metal (MM) copings were generated. As controls, ten (n = 10) each s/c zirconia copings were copy-milled (ZZ) and ten (n = 10) each s/c metal copings were cast (CC). The vertical marginal discrepancy of the copings was measured at 20 predefined spots of the circular shoulder and chamfer finish lines in microns (μm) before and after a first and a second veneering firing using a stereomicroscope at ×40 magnification...
January 13, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28076502/carcinogenesis-in-rats-subjected-to-a-new-model-ureterosigmoidostomy-and-treated-with-l-lysine
#3
Alessandra Marques Dos Santos, Joao Paulo Ferreira Coelho, Camila de Carvalho Juanes, Rafael Barbosa de Azevedo, Nayanna de Oliveira Ramos Melo, Francisco Vagnaldo Fechine Jamacaru, Conceição Aparecida Dornelas
PURPOSE: To evaluate the effects of L-lysine on the intestinal and urothelial epithelium of rats subjected to ureterosigmoidostomy (new model for surgical carcinogenesis). METHODS: Forty-two rats, 9 weeks of age, were divided into 6 groups. Animals in groups A, B, C were subjected to ureterosigmoidostomy (US) and treated with L-lysine, celecoxib and H2O, respectively. Groups D, E and F (non-operated controls) received L-lysine, celecoxib and H2O, respectively. The L-lysine dose was 150 mg/kg and that of celecoxib was 20 mg/kg...
December 2016: Acta Cirúrgica Brasileira
https://www.readbyqxmd.com/read/28076461/an-in-vitro-evaluation-of-various-irrigation-techniques-for-the-removal-of-double-antibiotic-paste-from-root-canal-surfaces
#4
Hakan Gokturk, Ismail Ozkocak, Fevzi Buyukgebiz, Osman Demir
Objective: The aim of this study was to investigate the effectiveness of conventional syringe irrigations, passive ultrasonic irrigation (PUI), Vibringe, CanalBrush, XP-endo Finisher, and laser-activated irrigation (LAI) systems in removing double antibiotic paste (DAP) from root canals. Material and Methods: One hundred five extracted single-rooted teeth were instrumented. The roots were split longitudinally. Three standard grooves were created and covered with DAP...
November 2016: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/28070263/evaluating-the-microshear-bond-strength-and-microleakage-of-flowable-composites-containing-zinc-oxide-nano-particles
#5
Koorosh Teymoornezhad, Homayoun Alaghehmand, Ghazaleh Daryakenari, Soraya Khafri, Mitra Tabari
INTRODUCTION: Preventive resin restorations (PRR) are the conservative choice for the most common carious lesions in children. Thus, new age flowable resin composites with higher filler content are readily used. The aim of this study was to evaluate the microshear bond strength and microleakage of two flowable resin composites containing different percentages of nano zinc oxide (NZnO) particles, which have proven to have antimicrobial properties. METHODS: This experimental in-vitro study was carried out in the Dental Material Research Center of Babol University of Medical Sciences in 2015...
November 2016: Electronic Physician
https://www.readbyqxmd.com/read/28061389/in-vitro-proliferation-of-periodontal-ligament-like-tissue-on-extracted-teeth
#6
T Iwata, C Mino, T Kawata
OBJECTIVE: Transplantation of autologous teeth is a routine component of orthodontic treatment. The aim of this study was to develop a method for the regeneration of damaged periodontal ligament (PDL) on extracted teeth using a three-dimensional culture system. DESIGN: We used the maxillary first premolars or third molars extracted from patients for orthodontic treatment. The extracted teeth were stained with toluidine blue to measure the residual PDL area. After confirming damage of the periodontal tissue on the root surface of the extracted teeth, we tried to regenerate the periodontal tissue...
November 30, 2016: Archives of Oral Biology
https://www.readbyqxmd.com/read/28060317/observation-and-quantification-of-mating-behavior-in-the-pinewood-nematode-bursaphelenchus-xylophilus
#7
Najie Zhu, Liqun Bai, Stefan Schütz, Baojun Liu, Zhenyu Liu, Xingyao Zhang, Hongshi Yu, Jiafu Hu
A method for observing and quantifying the mating behavior of the pinewood nematode, Bursaphelenchus xylophilus, was established under a stereomicroscope. To improve the mating efficiency of B. Xylophilus and to increase the chances of mating observation, virgin adults were cultured and used for the investigation. Eggs were obtained by keeping the nematodes in water and allowing the females to lay eggs for 10 min. The second-stage juveniles (J2) were synchronized by incubating the eggs for 24 h at 25 °C in the dark, and the early J4 were obtained by culturing the J2 with grey mold, Botrytis cinerea, for another 52 h...
December 25, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28060297/protocol-for-microplastics-sampling-on-the-sea-surface-and-sample-analysis
#8
Manca Kovač Viršek, Andreja Palatinus, Špela Koren, Monika Peterlin, Petra Horvat, Andrej Kržan
Microplastic pollution in the marine environment is a scientific topic that has received increasing attention over the last decade. The majority of scientific publications address microplastic pollution of the sea surface. The protocol below describes the methodology for sampling, sample preparation, separation and chemical identification of microplastic particles. A manta net fixed on an »A frame« attached to the side of the vessel was used for sampling. Microplastic particles caught in the cod end of the net were separated from samples by visual identification and use of stereomicroscopes...
December 16, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28052208/microleakage-evaluation-of-composite-restorations-following-papain-based-chemo-mechanical-caries-removal-in-primary-teeth
#9
Marwa Abdel Hafez, Mona Elkateb, Sonia El Shabrawy, Amel Mahmoud, Omar El Meligy
AIM: To evaluate the microleakage of composite restorations following Papain-based chemo-mechanical caries removal compared to the conventional drilling method. The characteristic of the hybrid layer was also studied using scanning electron microscopy. STUDY DESIGN: The sample included thirty freshly extracted and exfoliated primary molars with open proximal carious dentin lesions. Teeth were divided into two equal groups, according to method of caries removal. Following caries removal, cavity preparations were restored with composite resin...
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
#10
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/28050507/shear-bond-strength-of-ceramic-brackets-with-different-base-designs-comparative-in-vitro-study
#11
Mohd Younus Ansari, Deepak K Agarwal, Ankur Gupta, Preeti Bhattacharya, Juhi Ansar, Ravi Bhandari
INTRODUCTION: Knowledge about the Shear Bond Strength (SBS) of ceramic brackets with different base design is essential as it affects bond strength to enamel. AIM: The aim of the present study was to evaluate and compare the effect of base designs of different ceramic brackets on SBS, and to determine the fracture site after debonding. MATERIALS AND METHODS: Four groups of ceramic brackets and one group of metal brackets with different base designs were used...
November 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28003824/accuracy-of-the-one-stage-and-two-stage-impression-techniques-a-comparative-analysis
#12
Ladan Jamshidy, Hamid Reza Mozaffari, Payam Faraji, Roohollah Sharifi
Introduction. One of the main steps of impression is the selection and preparation of an appropriate tray. Hence, the present study aimed to analyze and compare the accuracy of one- and two-stage impression techniques. Materials and Methods. A resin laboratory-made model, as the first molar, was prepared by standard method for full crowns with processed preparation finish line of 1 mm depth and convergence angle of 3-4°. Impression was made 20 times with one-stage technique and 20 times with two-stage technique using an appropriate tray...
2016: International Journal of Dentistry
https://www.readbyqxmd.com/read/27988563/-i-coendutermes-i-i-tucum-i-fontes-isoptera-termitidae-nasutitermitinae-description-of-the-imago-caste-and-additional-notes
#13
Carolina Cuezzo
Coendutermes Fontes, 1985 is a monotypic South American termite genus. Coendutermes tucum Fontes, 1985, was described based on morphological characters from soldiers and workers collected in Mato Grosso, Brazil, and Jodensavanne, Suriname. Herein, I describe the imago caste of C. tucum for the first time with additional notes on soldiers, workers, and new distributional records. The studied material is deposited at the Museu de Zoologia da Universidade de São Paulo, São Paulo, Brazil (MZUSP). I use the terminology of Fontes (1987) to describe worker mandibles, and that of Noirot (2001) for the different parts of the digestive tube of workers...
December 9, 2016: Zootaxa
https://www.readbyqxmd.com/read/27982235/evaluation-of-different-passive-ultrasonic-irrigation-protocols-on-the-removal-of-dentinal-debris-from-artificial-grooves
#14
Rodrigo Ricci Vivan, Jussaro Alves Duque, Murilo Priori Alcalde, Marcus Vinicius Reis Só, Clóvis Monteiro Bramante, Marco Antonio Hungaro Duarte
The aim of this study was to evaluate the influence of different passive ultrasonic irrigation protocols on the removal of debris in artificially created grooves in the cervical, middle and apical root thirds. Forty extracted bovine incisor roots were instrumented to 1 mm of the root apex with a R50 Reciproc instrument and irrigated with 2.5% sodium hypochlorite. The roots were then inserted in a muffle and cleaved into two hemisections. Grooves (3-mm long) were done at 2, 7 and 12 mm from the root apex in one hemisection and filled with dentinal debris...
September 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27965486/comparison-of-shear-bond-strength-and-microleakage-of-various-bulk-fill-bioactive-dentin-substitutes-an-in-vitro-study
#15
Fahad I Alkhudhairy, Zeeshan H Ahmad
INTRODUCTION: Various bulk-fill materials depending on their composition, viscosity, and flow ability have different physical and mechanical properties. The aim of this in vitro study was to determine and compare the shear bond strength and microleakage properties of activa restorative with other bulk-fill restorative materials surefil (SDR), Biodentine, ever X posterior. MATERIALS AND METHODS: Forty permanent premolars were selected for shear bond strength, and 20 permanent premolars were selected with class II cavities on mesial and distal side for microleakage...
December 1, 2016: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/27920473/na-hco3-cotransporter-is-expressed-on-%C3%AE-and-%C3%AE-cells-during-rat-pancreatic-development
#16
Li-Hua Cao, Cheng-Cai Xia, Zhao-Chun Shi, Ning Wang, Zheng-Hua Gu, Li-Zhi Yu, Qi Wan, Wei De
AIM: To determine the expression and localization of the electrogenic Na(+)/HCO3(-) cotransporter (NBC1) in rat pancreas during development. METHODS: The rat pancreas from postnatal and embryos removed from the uterus of pregnant rats that had been sacrificed by CO2 asphyxiation were used. Rat pancreas from embryonic day (E) 15.5 and E18.5 rat embryos was isolated under a stereomicroscope. Rat pancreas from postnatal (P) days 0, 7, 14, 21 and adult was directly isolated by the unaided eye...
November 21, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/27919636/adrenomedullin-and-angiotensin-ii-signaling-pathways-involved-in-the-effects-on-cerebellar-antioxidant-enzymes-activity
#17
Figueira Leticia, Israel Anita
Human adrenomedullin (AM) is a 52-amino acid peptide involved in cardiovascular control. AM has two specific receptors formed by the calcitonin-receptor-like receptor (CRLR) and receptor activity-modifying protein (RAMP) 2 or 3, known as AM1 and AM2 receptors, respectively. In addition, AM has appreciable affinity for the calcitonin gene-1 related peptide receptor (CGRP1), composed of CRLR/RAMP1. In brain, AM and their receptors are expressed in several localized areas, including the cerebellum. AM has been reported as an antioxidant...
January 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/27881325/influence-of-porcelain-firing-and-cementation-on-the-marginal-adaptation-of-metal-ceramic-restorations-prepared-by-different-methods
#18
Necati Kaleli, Duygu Saraç
STATEMENT OF PROBLEM: Marginal adaptation plays an important role in the survival of metal ceramic restorations. Porcelain firings and cementation may affect the adaptation of restorations. Moreover, conventional casting procedures and casting imperfections may cause deteriorations in the marginal adaptation of metal ceramic restorations. PURPOSE: The purpose of this in vitro study was to compare the marginal adaptation after fabrication of the framework, porcelain application, and cementation of metal ceramic restorations prepared by using the conventional lost-wax technique, milling, direct metal laser sintering (DMLS), and LaserCUSING, a direct process powder-bed system...
October 27, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27878896/bonding-performance-of-universal-adhesives-to-er-cr-ysgg-laser-irradiated-enamel
#19
Muhammet Kerim Ayar, Fatih Erdemir
Universal adhesives have been recently introduced for use as self-etch or etch-and-rinse adhesives depending on the dental substrate and clinical condition. However, their bonding effectiveness to laser-irradiated enamel is still not well-known. Thus, the aim of this study was to compare the shear bond strength (SBS) of universal adhesives (Single Bond Universal; Nova Compo-B Plus) applied to Er,Cr:YSGG laser-irradiated enamel with SBS of the same adhesives applied in self-etch and acid-etching modes, respectively...
November 23, 2016: Microscopy Research and Technique
https://www.readbyqxmd.com/read/27876081/in-vitro-activity-of-ten-essential-oils-against-sarcoptes-scabiei
#20
Fang Fang, Kerdalidec Candy, Elise Melloul, Charlotte Bernigaud, Ling Chai, Céline Darmon, Rémy Durand, Françoise Botterel, Olivier Chosidow, Arezki Izri, Weiyi Huang, Jacques Guillot
BACKGROUND: The development of alternative approaches in ectoparasite management is currently required. Essential oils have been demonstrated to exhibit fumigant and topical toxicity to a number of arthropods. The aim of the present study was to assess the potential efficacy of ten essential oils against Sarcoptes scabiei. METHODS: The major chemical components of the oils were identified by GC-MS analysis. Contact and fumigation bioassays were performed on Sarcoptes mites collected from experimentally infected pigs...
November 22, 2016: Parasites & Vectors
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