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https://www.readbyqxmd.com/read/29778987/effect-of-ethanol-dissolved-rhodamine-b-marker-on-mechanical-properties-of-non-simplified-adhesives
#1
Camila Moreira Machado, Odair Bim Júnior, Marina Ciccone Giacomini, Márcia Sirlene Zardin Graeff, Fernanda Cristina Pimentel Garcia, Daniela Rios, Heitor Marques Honório, Linda Wang
OBJECTIVES: Rhodamine B (RB) is commonly used to evaluate dental polymers, including dental bonding systems (DBS). For reliability assessments, its effect should not only allow visualization of the dentin-polymer interface but also must not interfere with the bonding of the DBS to dentin as measured by the microtensile bond strength and hardness tests. MATERIAL AND METHODS: Flat human dentin surfaces were prepared and randomly distributed (n = 10) into six groups: Adper Scotchbond Multi-Purpose (MP) or Clearfil SE Bond (SE) in concentrations of none/control, 0...
May 17, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29763357/comparative-evaluation-of-endovac-and-conventional-irrigating-syringe-on-apical-extrusion-in-primary-molars-an-in-vitro-study
#2
Nilaya Reddy Venumbaka, Porselvi Baskaran, Jayanthi Mungara, Madhan Chenchugopal, Arun Elangovan, Poornima Vijayakumar
OBJECTIVES: The present study was undertaken to evaluate and compare the apical extrusion of irrigant and depth of irrigant penetration into dentine using the EndoVac irrigating system and manual irrigation system in primary molar teeth. STUDY DESIGN: Twenty five extracted primary molars satisfying the inclusion and exclusion criteria were divided into two groups with 29 roots in each group with an equal distribution of apical foramen area. The teeth were mounted in pre-weighed glass bottles and the canals were irrigated with 5...
May 15, 2018: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/29761445/live-single-cell-mass-spectrometry-lsc-ms-for-plant-metabolomics
#3
Keiko Masuda, Yasmine Abouleila, Ahmed Ali, Toshio Yanagida, Tsutomu Masujima
Live single-cell mass spectrometry (LSC-MS) allows for the detection of hundreds to thousands of metabolite peaks acquired from a single plant cell within a few minutes. Plant cells are first observed under a stereomicroscope, a cell of interest is chosen, and then sampled using a metal-coated glass microcapillary for subsequent analysis. A few microliters of ionization solvent is then added to the rear end of the capillary followed by the introduction of the capillary's content directly into the mass spectrometer...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29754275/zinc-oxide-eugenol-paste-jeopardises-the-adhesive-bonding-to-primary-dentine
#4
C W Pires, T L Lenzi, F Z M Soares, R O Rocha
AIM: This was to evaluate the influence of root canal filling pastes on microshear bond strength (µSBS) of an adhesive system to primary dentine. METHODS: Human (32) primary molars were randomly assigned into four experimental groups (n = 8): zinc oxide eugenol paste (ZOE); iodoform paste (Guedes-Pinto paste); calcium hydroxide paste thickened with zinc oxide; and no filling paste (control). Flat dentine surfaces were covered with a 1 mm-thick layer of the pastes for 15 min at 37 °C...
May 12, 2018: European Archives of Paediatric Dentistry: Official Journal of the European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/29750624/evaluation-of-the-effect-of-different-root-canal-preparation-techniques-in-primary-teeth-using-cbct
#5
Shahid M Shaikh, Mousumi Goswami
OBJECTIVES: The purpose of this in vitro study was to compare and evaluate the cleaning and shaping efficiency of the rotary Ni-Ti, sonic and conventional file systems for root canal preparation in primary teeth under CBCT. STUDY DESIGN: Seventy five maxillary and mandibular first and second primary molars were divided into three groups of 25 teeth each, according to the canal preparation technique: Group I Rotary file system, Group II Sonic file system, Group III Conventional K files...
May 11, 2018: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/29750621/effect-of-two-traditional-polyacrylic-acid-conditioners-and-2-chlorhexidine-digluconate-on-cavosurface-microleakage-of-glass-ionomer-restorations
#6
Diva Lugassy, Pnina Segal, Sigalit Blumer, Michal Eger, Asaf Shely, Shlomo Matalon
OBJECTIVES: A lack of appropriate adhesiveness is one of the biggest problems in restorative dentistry today and the main cause of microleakage. This is especially true in pediatric dentistry where moisture control is more difficult to achieve. Glass ionomer restorative materials increase adhesion and decrease microleakage given their chemical adhesion to the remaining tooth substance. Pretreatment improves the adhesion quality. The aim of this study was to assess the microleakage of Glass ionomer restorative materials following application of 20% polyacrylic acid, 10% polyacrylic acid or 2% chlorhexidine digluconate in Class V cavities...
May 11, 2018: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/29742874/-hypolobocera-guayaquilensis-decapoda-pseudothelphusidae-a-new-crab-intermediate-host-of-paragonimus-mexicanus-in-manab%C3%A3-province-ecuador
#7
Manuel Calvopina, Daniel Romero-Alvarez, Melina Rendon, Hidekazu Takagi, Hiromu Sugiyama
To determine that Paragonimus sp. is actively transmitted in a tropical area of the Pacific region of Ecuador where human cases of pulmonary paragonimiasis have recently been documented, a total of 75 freshwater crabs were collected from 2 different streams in the Pedernales area of Manabí Province, Ecuador. All collected crabs were identified as Hypolobocera guayaquilensis based on morphological characteristics of the male gonopods. The hepatopancreas of each crab was examined by compressing it between 2 glass plates followed by observation under a stereomicroscope...
April 2018: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/29742232/can-low-fusing-glass-application-affect-the-marginal-misfit-and-bond-strength-of-y-tzp-crowns
#8
Monize Carelli Felipe Antunes, Jean Soares Miranda, Ronaldo Luís Almeida de Carvalho, Rodrigo Furtado de Carvalho, Estevão Tomomitsu Kimpara, Rodrigo Othávio de Assunção E Souza, Fabíola Pessôa Pereira Leite
To evaluate the effect of different surface treatments on the marginal misfit and retentive strength between Y-TZP crowns and an epoxy resin. Forty (40) epoxy resin (G10) abutments (height: 5mm, conicity: 60, finish line: large chamfer) with equal dimensions were milled and included in polyurethane to simulate the periodontal ligament. Next, 40 Y-TZP crowns (thickness: 1mm) were milled (Cerec in Lab) and randomly divided into four groups (n=10) according to the surface treatment: GS(glaze spray), GP(glaze powder/liquid), P(zirconia primer) and RS(tribochemical silica coating)...
2018: Brazilian Oral Research
https://www.readbyqxmd.com/read/29732022/variations-in-enamel-damage-after-debonding-of-two-different-bracket-base-designs-an-in-vitro-study
#9
Mohammad Hossein Ahangar Atashi, Amir Hooman Sadr Haghighi, Parastou Nastarin, Sina Ahangar Atashi
Background. Bracket base design is a factor influencing shear bond strength. High shear bond strength leads to enamel crack formation during debonding. The aim of this study was to compare enamel damage variations, including the number and length of enamel cracks after debonding of two different base designs. Methods. Eighty-eight extracted human premolars were randomly divided into2 groups (n=44). The teeth in each group were bonded by two types of brackets with different base designs: 80-gauge mesh design versus anchor pylon design with pylons for adhesive retention...
2018: Journal of Dental Research, Dental Clinics, Dental Prospects
https://www.readbyqxmd.com/read/29732014/comparison-of-the-shear-bond-strength-of-silorane-based-composite-resin-and-methacrylate-based-composite-resin-to-mta
#10
Buse Ayse Serin, Muharrem Cem Dogan, Hamdi Oguz Yoldas
Background. Mineral trioxide aggregate (MTA) is a material that has recently gained popularity in the application of the vital pulp therapy. Along with the increasing use of MTA to this end, the permanent restoration material to be placed on MTA has become a significant issue. The aim of this in vitro study was to investigate the bond strength of the novel low-shrinkage silorane-based composite resin (SBC) to MTA. Methods. Twenty acrylic blocks filled with MTA were prepared for this study. SBC was the test group and methacrylate-based composite resin (MBC) was used as the control group...
2018: Journal of Dental Research, Dental Clinics, Dental Prospects
https://www.readbyqxmd.com/read/29731862/synergistic-anti-tumor-effects-of-dasatinib-and-dendritic-cell-vaccine-on-metastatic-breast-cancer-in-a-mouse-model
#11
Ningning Song, Hulin Guo, Jia Ren, Suhong Hao, Xinchao Wang
Immunotherapy is currently considered as one of the major anti-tumor modalities, but its efficacy is limited. Dasatinib could improve the expansion and recruitment of cluster of differentiation (CD) 8+ T cells and natural killer (NK) cells to the tumor microenvironment. The present study aimed to evaluate the synergistic anti-tumor effects of dasatinib with dendritic cell (DC) vaccine in metastatic breast cancer. Dasatinib with DC vaccine was administered to mice inoculated with 4T1 breast cancer cells. Thereafter, tumor volume was measured every other day...
May 2018: Oncology Letters
https://www.readbyqxmd.com/read/29730310/analysis-and-identification-of-elongated-mineral-particles-in-road-coated-aggregates
#12
Erell Leocat, Christophe Rielland, Aurélien Urvoy, Patrice Letessier
The issue of Elongated Mineral Particles (EMP) in building materials has been revealed during roadworks in 2013 in France. In fact, road coating aggregates are made of specific rock gravels that can contain Naturally Occurring Asbestos (NOA), which is mainly actinolite. The legislation refers to six regulatory asbestos, that consist in asbestiform habitus of the six minerals. The current technical standard is not adapted for analyzing natural material, as it cannot distinguish the asbestiform fibers and the cleavage fragments fibers...
May 3, 2018: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/29728542/fracture-strength-of-posterior-crowns-made-of-adoro-and-gradia-fiber-reinforced-composites
#13
Hosseinali Mahgoli, Mahnaz Arshad, Mehdi Saeedirad, Mohammad H Mahgoli
Aim: The aim of this study was to assess the fracture strength of posterior crowns made of Adoro and Gradia fiber-reinforced composites (FRCs). Materials and methods: In this in vitro, experimental study, extracted sound 37 maxillary first and second premolars were selected. A celluloid index was taken from teeth and the teeth received crown preparation. Impressions were made and poured. Composite crowns were fabricated of Adoro and Gradia composite resins. After curing, the teeth were immersed in distilled water for 24 hours and thermal cycled for 6,000 cycles between 5 and 55°C...
April 1, 2018: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29714697/evaluation-of-the-marginal-integrity-of-a-bioactive-restorative-material
#14
Barry M Owens, Jeffrey G Phebus, William W Johnson
This in vitro study evaluated the marginal microleakage of a bioactive restorative with other restorative materials in standard Class V preparations. Sixty previously extracted, noncarious human molars were randomly assigned to 3 experimental groups (n = 20): a bioactive composite resin, a universal hybrid composite resin, and a resin-modified glass ionomer restorative. Class V cavities were prepared on the facial or lingual surface of each tooth so that coronal margins were located in enamel and apical margins in cementum (dentin)...
May 2018: General Dentistry
https://www.readbyqxmd.com/read/29713429/what-is-the-changing-frequency-of-diamond-burs
#15
Faruk Emir, Simel Ayyildiz, Cem Sahin
PURPOSE: The purpose of this study was to determine the changing frequency of a diamond bur after multiple usages on 3 different surfaces. MATERIALS AND METHODS: Human premolar teeth (N = 26), disc shaped direct metal laser sintered CoCr (N = 3) and zirconia specimens (N = 3) were used in this study. Groups named basically as Group T for teeth, Group M for CoCr, and Group Z for zirconia. Round tapered black-band diamond bur was used. The specimens were randomly divided into three groups and placed with a special assembly onto the surveyor...
April 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29707020/effects-of-reciproc-protaper-next-and-waveone-gold-on-root-canal-walls-a-stereomicroscope-analysis
#16
Marcely Cassimiro, Kaline Romeiro, Luciana Gominho, Andressa de Almeida, Lívia Silva, Diana Albuquerque
Introduction: The aim of this study was to analyse the potential occurrence of dentinal defects after root canal preparation using three engine-driven instruments. Methods and Materials: Eighty permanent mandibular incisors were selected. Twenty teeth did not undergo preparation, and the remaining teeth were divided into three groups ( n =20): Reciproc (REC) , ProTaper Next (PTN) and WaveOne Gold (WOG). The samples were dyed with methylene blue, sectioned perpendicularly to the long axis in 3-, 6- and 9-mm slices and were finally observed under a stereomicroscope (under 25×)...
2018: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/29707009/the-effect-of-canal-preparation-with-four-different-rotary-systems-on-formation-of-dentinal-cracks-an-in-vitro-evaluation
#17
Elham Khoshbin, Zakiyeh Donyavi, Erfan Abbasi Atibeh, Ghodratollah Roshanaei, Faranak Amani
Introduction: Endodontic rotary systems may result in dentinal cracks. They may propagate to vertical root fracture that compromises the outcome of endodontic treatment. This study aimed to compare Neolix and Reciproc (single-file systems), Mtwo and ProTaper (conventional rotary systems) in terms of dentinal crack formation in root canal walls. Methods and Materials: This in vitro study was conducted on 110 extracted human single-rooted teeth. The teeth were randomly divided into four experimental groups ( n =25) for root canal preparation with Neolix, Reciproc, Mtwo and ProTaper systems and two control groups ( n =5)...
2018: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/29693083/effectiveness-of-titanium-tetrafluoride-on-the-bond-strength-of-resin-cement-to-titanium
#18
Shaymaa E Elsaka
PURPOSE: To assess the influence of titanium tetrafluoride (TiF4) solution on the adhesion of composite cement to commercially pure titanium (cp Ti). MATERIALS AND METHODS: cp Ti plates with dimensions of 30 mm × 8 mm × 1.5 mm were machined and polished. The specimens were divided into seven groups according to the surface treatment as follows: group 1: control (machined); group 2: sandblasted with 110 μm Al2O3; group 3: hydrofluoric acid (HF); group 4: TiF4 (5%-5 min); group 5: TiF4 (5%-10 min); group 6: TiF4 (10%-5 min); and group 7: TiF4 (10%-10 min)...
April 24, 2018: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/29692840/evaluating-the-root-canal-morphology-of-permanent-maxillary-first-molars-in-iranian-population
#19
Mohsen Rezaeian, Maryam Rouhani Tonekaboni, Foad Iranmanesh
Introduction: A successful endodontic treatment depends on a comprehensive knowledge of the morphology of canal and its variations, an appropriate access cavity, proper cleaning and shaping and adequate root canal filling. The present study was carried out to evaluate the root canal morphology of permanent maxillary first molars in an Iranian population. Methods and Materials: In this in vitro study, 80 extracted permanent maxillary first molars from a population in Rafsanjan, Iran were collected...
2018: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/29692633/shear-bond-strength-of-a-bracket-bonding-system-cured-with-a-light-emitting-diode-or-halogen-based-light-curing-unit-at-various-polymerization-times
#20
Sanjay Prasad Gupta, Basanta Kumar Shrestha
Purpose: To determine and compare the shear bond strength (SBS) of bracket-bonding system cured with light-emitting diode (LED) and halogen-based light-curing unit at various polymerization times. Materials and methods: Ninety six human maxillary premolar teeth extracted for orthodontic purpose were divided into four groups, according to the light-curing unit and exposure times used. In the halogen group, the specimens were light cured for 20 and 40 seconds. In the LED group, the specimens were light cured for 5 and 10 seconds...
2018: Clinical, Cosmetic and Investigational Dentistry
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