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https://www.readbyqxmd.com/read/28444854/analysis-of-organic-components-in-resin-modified-pulp-capping-materials-critical-considerations
#1
Bo W Nilsen, Einar Jensen, Ulf Örtengren, Vibeke B Michelsen
The purpose of this study was to elucidate the organic composition and eluates of three resin-based pulp-capping materials in relation to their indications and safety data sheets. Uncured samples of Theracal LC, Ultra-Blend Plus, and Calcimol LC were investigated using gas chromatography-mass spectrometry (GC-MS) and ultra-performance liquid chromatography-mass spectrometry (UPLC-MS). Identification/quantification of 7-d leachables of cured samples was performed using GC-MS for 2-hydroxyethyl methacrylate (HEMA), 2-(dimethylamino)ethyl methacrylate (DMAEMA), camphorquinone (CQ), ethylene glycol dimethacrylate (EGDMA), ethyl-4-(dimethylamino)benzoate (DMABEE), and triethylene glycol dimethacrylate (TEGDMA)...
April 26, 2017: European Journal of Oral Sciences
https://www.readbyqxmd.com/read/28439577/shear-bond-strength-of-lining-materials-to-calciumsilicate-cements-at-different-time-intervals
#2
Alena Schmidt, Edgar Schäfer, Till Dammaschke
PURPOSE: To compare the shear bond strength of three different light-curing, flowable composites (Ionoseal [IS], Vertise flow [VF], and Futurabond NR + Grandio Flow [GF]) on MTA-Angelus [MTA] or Biodentine [BD] at three different time intervals. MATERIALS AND METHODS: Freshly mixed MTA or BD was applied into 180 identical plaster molds. Three minutes, 15 min, and 2 days after mixing, specimens of IS, VF, and GF with standardized size and diameter were applied on MTA and BD specimens (n = 10 per material and time interval)...
April 21, 2017: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/28435361/effects-of-delivering-the-same-radiant-exposures-at-730-1450-and-2920-mw-cm-2-to-two-resin-based-composites
#3
Maan M AlShaafi
OBJECTIVE: To evaluate the effects of curing two resin-based composites (RBC) with the same radiant exposures at 730, 1450, and 2920 mW/cm(2). MATERIALS AND METHODS: Two types of RBC, Filtek Supreme Ultra and Tetric-EvoCeram-Bulk Fill, were light-cured to deliver the same radiant exposures for 5, 10, or 20 s by means of a modified Valo light emitted diode light-curing unit with the light tip placed directly over each specimen. The RBC was expressed into metal rings that were 2...
January 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/28419885/registry-of-implants-for-the-reconstruction-of-pelvic-floor-in-males-and-females-a-feasibility-case-series
#4
Dimitri Barski, Holger Gerullis, Thorsten Ecke, Jennifer Kranz, Laila Schneidewind, Nadine Leistner, Fabian Queissert, Sandra Mühlstädt, Markus Grabbert, Rana Tahbaz, Alexandre Egon Pelzer, Ralf Joukhadar, Uwe Klinge, Mihaly Boros, Werner Bader, Gert Naumann, Frank Puppe, Thomas Otto
INTRODUCTION: Most aspects of implant-assisted reconstruction of pelvic floor in males and females are under debate and the research is not standardized. Registries are supposed to shed light to the indications, surgical techniques and material properties and to establish a standardized evaluation. METHODS: A working group was formed to create an online platform for registration and outcome measurement of implant-assisted operations for pelvic organ prolapse (POP) and female and male stress urinary incontinence (SUI)...
April 15, 2017: International Journal of Surgery
https://www.readbyqxmd.com/read/28413588/relative-biocompatibility-of-micro-hybrid-and-nano-hybrid-light-activated-composite-resins
#5
Abiodun Olabisi Arigbede, Bukola Folasade Adeyemi, Omowumi Femi-Akinlosotu
Background. In vitro studies have revealed a direct association between resin content and cytotoxicity of composite resins; however, implantation studies in this regard are sparse. This study investigates the relationship between filler content of composite resins and biocompatibility. Methods. This research employed twelve 180‒200-gr male Wistar rats, 1 nano-hybrid (Prime-Dent Inc.) and 1 micro-hybrid (Medental Inc.) composite resins containing 74% and 80‒90% filler content, respectively. The samples were assessed on the 2nd, 14th and 90th day of implantation...
2017: Journal of Dental Research, Dental Clinics, Dental Prospects
https://www.readbyqxmd.com/read/28412675/paired-observation-on-light-cured-composite-resin-and-nano-composite-resin-in-dental-caries-repair
#6
Tao Xiaoling, Muhammad Aqeel Ashraf, Zhao Yanyan
To compare the value of light-cured composite resin with that of nano-composite resin in dental caries repair. 88 patients taking dental caries repair in our hospital from May 2014 to April 2015 were selected, and divided into observation group and control group by coin method with 44 patients in each group. Nano-composite resin was used in observation group, while light-cured composite resin in control group. Then, the occurrence rates of odontohyperesthesia, aesthetic satisfaction with dental caries repair and complications were compared between two groups by visual analogue scale (VAS)...
November 2016: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28403360/influence-of-resin-modified-glass-ionomer-and-topical-fluoride-on-levels-of-streptococcus-mutans-in-saliva-and-biofilm-adjacent-to-metallic-brackets
#7
Marcela Cristina Damião Andrucioli, Gisele Faria, Paulo Nelson-Filho, Fábio Lourenço Romano, Mírian Aiko Nakane Matsumoto
Decalcification of enamel during fixed orthodontic appliance treatment remains a problem. White spot lesions are observed in nearly 50% of patients undergoing orthodontic treatment. The use of fluoride-containing orthodontic materials has shown inconclusive results on their ability to reduce decalcification. The aims of this investigation were to compare the levels of Streptococcus mutans (SM) in saliva and biofilm adjacent to orthodontic brackets retained with a resin-modified glass ionomer cement (RMGIC) (Fuji ORTHO LC) and a light cured composite resin (Transbond XT), and to analyze the influence of topical application of the 1...
March 2017: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/28403354/effects-of-radiant-exposure-values-using-second-and-third-generation-light-curing-units-on-the-degree-of-conversion-of-a-lucirin-based-resin-composite
#8
Kelly Antonieta Oliveira Rodrigues de Faria Cardoso, Driellen Christine Zarpellon, Camila Ferreira Leite Madruga, José Augusto Rodrigues, Cesar Augusto Galvão Arrais
Objective: Using Fourier transform infrared analysis (FTIR) in vitro, the effects of varying radiant exposure (RE) values generated by second and third generation LED LCUs on the degree of conversion (DC) and maximum rate of polymerization (Rpmax) of an experimental Lucirin TPO-based RC were evaluated. Material and Methods: 1 mm or 2 mm thick silicon molds were positioned on a horizontal attenuated total reflectance (ATR) unit attached to an infrared spectroscope...
March 2017: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/28402730/light-emitting-diode-beam-profile-and-spectral-output-influence-on-the-degree-of-conversion-of-bulk-fill-composites
#9
M G Rocha, Dcrs de Oliveira, I C Correa, L Correr-Sobrinho, Mac Sinhoreti, J L Ferracane, A B Correr
OBJECTIVES: To evaluate the beam profile and the spectral output of monowave and polywave light-emitting diodes (LEDs) and their influence on the degree of conversion (DC) of bulk fill composites. METHODS: A monowave LED (Smartlite Focus, Dentsply) and a polywave LED (Valo Cordless, Ultradent) were characterized using a resin calibrator and a laser beam profile analyzer. Two bulk fill composites, Sonic Fill 2 (SF) containing camphorquinone (CQ) and Tetric EvoCeram Bulk Fill (TEB) containing CQ associated with alternative photoinitiators, were placed in custom-designed molds (n=3) and photoactivated by the monowave or polywave LED with 20 J/cm(2)...
April 12, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28401271/-light-protection-for-xeroderma-pigmentosum
#10
REVIEW
M Ettinger, M Berneburg
Xeroderma pigmentosum is a rare autosomal recessive disorder which is caused by germinal mutations responsible for the repair of ultraviolet (UV) radiation-induced DNA lesions. It is characterized by hypersensitivity to UV radiation, poikiloderma, ocular surface disease, and in some patients pronounced sunburn and neurological disease. Patients have a very high risk of developing ocular and skin cancer on exposed body sites. No cure is available for these patients except complete protection from all types of UV radiation...
April 11, 2017: Der Hautarzt; Zeitschrift Für Dermatologie, Venerologie, und Verwandte Gebiete
https://www.readbyqxmd.com/read/28400865/bond-strength-of-repaired-acrylic-denture-teeth-using-visible-light-cure-composite-resin
#11
Saja Ali Muhsin
BACKGROUND: Although bonding to denture teeth after surface treatment with chemical agents is desirable, there is little information on the use of Visible Light Cure composite resin (VLC) as bonding denture materials. OBJECTIVES: To determine the effect of various surface treatments on shear bond strength between Visible Light Cure composite resin and the acrylic denture teeth interface. METHODS: Forty cylindrical sticks of acrylic resin with denture teeth mounted atop were prepared...
2017: Open Dentistry Journal
https://www.readbyqxmd.com/read/28400596/the-effect-of-the-teeth-bleaching-with-35-hydrogen-peroxide-on-the-tensile-bond-strength-of-metal-brackets
#12
Giedre Trakiniene, Simona Daukontiene, Vytautas Jurenas, Vilma Svalkauskiene, Dalia Smailiene, Kristina Lopatiene, Tomas Trakinis
The objective of this study was to determine the effects of teeth bleaching on the tensile bond strength of metal brackets bonded with light-curing adhesive system to the human enamel. 40 recently extracted human permanent molars were used for the study. The mesial buccal surface of each tooth was used as a control group and the distal buccal surface was used as an experimental group. Control group surfaces were not submitted to bleaching, while experimental group surfaces were bleached with in-office bleaching material containing 35% hydrogen peroxide...
April 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28397453/the-effect-of-curing-light-intensity-on-free-volume-size-in-some-dental-composites
#13
Mahdieh Shirazinia, Ali Akbar Mehmandoost-Khajeh-Dad, Vahid Dehghani, Jamshid Mehmandoost-Khajeh-Dad, Morteza Khaghani
BACKGROUND: Dental composite resins - reinforced polymers - are types of synthetic resins that are used in dentistry as restorative material or adhesives. The effect of curing-light intensity on free volume sizes of 4 commercial dental composites has been studied by means of the well-known positron annihilation lifetime spectroscopy technique. OBJECTIVES: The aim of the study was to compare the photosensitivity of 4 commercial dimethacrylate-based dental composites...
July 2016: Polimery W Medycynie
https://www.readbyqxmd.com/read/28392818/comparison-of-push-out-bond-strength-of-two-bulk-fill-and-one-conventional-composite-to-intracanal-dentin-in-severely-damaged-primary-anterior-teeth
#14
Shahram Mosharrafian, Zeynab Sharifi
OBJECTIVES: This study sought to compare the push-out bond strength of two bulk-fill and one conventional composite to intracanal dentin in primary anterior teeth. MATERIALS AND METHODS: This in vitro, experimental study was conducted on 39 primary anterior teeth, which were randomly divided into three groups. After cleaning and shaping, the root canals were filled with Metapex in such a way that after the application of 1mm light-cure liner on top of it, the coronal 3mm of the canal remained empty for composite post space...
June 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28386279/effect-of-rebonding-on-the-bond-strength-of-orthodontic-tubes-a-comparison-of-light-cure-adhesive-and-resin-modified-glass-ionomer-cement-in-vitro
#15
Monika Aleksiejunaite, Antanas Sidlauskas, Arunas Vasiliauskas
The purpose of this study was to determine the impact of different enamel preparation procedures and compare light cure composite (LCC) and resin-modified glass ionomer (RMGI) on the bond strength of orthodontic metal tubes rebonded to the enamel. Twenty human molars were divided into two groups (n = 10). Tubes were bonded using LCC (Transbond XT) in group 1 and RMGI (Fuji Ortho LC) in group 2. The tubes in each group were bonded following manufacturers' instructions (experiment I) and then debonded using testing machine...
2017: International Journal of Dentistry
https://www.readbyqxmd.com/read/28385431/color-stability-of-ceramic-laminate-veneers-cemented-with-light-polymerizing-and-dual-polymerizing-luting-agent-a-split-mouth-randomized-clinical-trial
#16
Ana Maria Estivalete Marchionatti, Vinícius Felipe Wandscher, Michele Mirian May, Marco Antonio Bottino, Liliana Gressler May
STATEMENT OF PROBLEM: The color stability of luting agents influences the esthetics of ceramic laminate veneers. Clinical studies that have evaluated the color changes of veneers cemented to enamel with light- and dual-polymerizing resin cement are lacking. PURPOSE: The purpose of this split-mouth randomized clinical trial was to evaluate the color change and marginal discoloration of dual- and light-polymerizing cement used for cementation of ceramic laminate veneers...
April 3, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28376902/the-first-isolation-and-molecular-characterization-of-toxoplasma-gondii-from-horses-in-serbia
#17
Ivana Klun, Aleksandra Uzelac, Isabelle Villena, Aurélien Mercier, Branko Bobić, Aleksandra Nikolić, Irena Rajnpreht, Marieke Opsteegh, Dominique Aubert, Radu Blaga, Joke van der Giessen, Olgica Djurković-Djaković
BACKGROUND: Consumption of undercooked or insufficiently cured meat is a major risk factor for human infection with Toxoplasma gondii. Although horsemeat is typically consumed rare or undercooked, information on the risk of T. gondii from infected horse meat to humans is scarce. Here, we present the results of a study to determine the presence of T. gondii infection in slaughter horses in Serbia, and to attempt to isolate viable parasites. METHODS: The study included horses from all regions of Serbia slaughtered at two abattoirs between June 2013 and June 2015...
April 4, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28375561/physicochemical-properties-and-cytotoxicity-of-an-experimental-resin-based-pulp-capping-material-containing-the-quaternary-ammonium-salt-and-portland-cement
#18
Y W Yang, F Yu, H C Zhang, Y Dong, Y N Qiu, Y Jiao, X D Xing, M Tian, L Huang, J H Chen
AIM: To evaluate in vitro the physicochemical properties, cytotoxicity and calcium phosphate nucleation of an experimental light-curable pulp-capping material composed of a resin with antibacterial monomer (MAE-DB) and Portland cement (PC). METHODOLOGY: The experimental material was prepared by mixing PC with a resin containing MAE-DB at a 2:1 ratio. Cured pure resin containing MAE-DB served as control resin. ProRoot MTA and Dycal served as commercial controls. The depth of cure, degree of monomer conversion, water absorption and solubility of dry samples, calcium release, alkalinizing activity, calcium phosphate nucleation and the cytotoxicity of materials were evaluated...
April 4, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28370693/computed-tomography-scoring-system-for-discriminating-between-parapneumonic-effusions-eventually-drained-and-those-cured-only-with-antibiotics
#19
José M Porcel, Marina Pardina, Carmen Alemán, Esther Pallisa, Richard W Light, Silvia Bielsa
BACKGROUND AND OBJECTIVE: Due to limited data, we aimed to develop and validate a computed tomography (CT)-based scoring system for identifying those parapneumonic effusions (PPEs) requiring drainage. METHODS: A retrospective review of all patients with PPE who underwent thoracentesis and a chest CT scan before any attempt to place a tube thoracostomy, if applicable, over an 8-year period was conducted. Eleven chest CT characteristics were compared between 90 patients with complicated PPEs (CPPEs), defined as those which eventually required chest drainage, and 60 with non-complicated effusions (derivation sample)...
March 30, 2017: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/28367908/effect-of-filler-particles-morphology-of-resin-composites-on-cavity-packing-force-for-repeated-condensation
#20
Muhammad Kaleem, David C Watts
Effect of variation in morphology and size of filler particles, temperature and increase in condensation speed on packability of resincomposites was investigated. Eight experimental light-cured resin-composites (RZDn series) were tested. Each material was placed in a cylindrical mould at 26 or 32ºC. A flat-ended stainless-steel probe (φ=6 mm) was mechanically lowered with two different speeds 2 and 8 mm/s onto and into at the surface of the unset sample until a compressive force of 1 N was reached. This was repeated for five cycles, and from each cycle Fp was calculated...
March 29, 2017: Dental Materials Journal
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