Methacrylates
Methylmethacrylates
Epoxy Compounds
Polymethyl Methacrylate
Methylmethacrylate
Polyhydroxyethyl Methacrylate
Endocrine Disruptors
Bisphenol A-Glycidyl Methacrylate
Polymethacrylic Acids
Materials Testing
Dental Materials
Polymerization
Denture Bases
Benzoyl Peroxide
Polymers
Environmental Pollutants
Resins, Synthetic
Wettability
Surface Properties
Nylons
Phthalic Acids
Adhesives
Prenatal Exposure Delayed Effects
Biocompatible Materials
Siloxanes
Silanes
Dental Cements
Pliability
Mechanical Phenomena
Maternal Exposure
Polycarboxylate Cement
Polyurethanes
Tissue Embedding
Air Pollutants, Occupational
Hydrogels
Plastic Embedding
Glucuronides
Dentin-Bonding Agents
Dental Stress Analysis
Dental Bonding
Hardness
Environmental Exposure
Photoinitiators, Dental
Parabens
Pregnancy
Diethylstilbestrol
Dentin
Resin Cements
Molecular Structure
Dose-Response Relationship, Drug
Dental Cavity Lining
Water
Thermogravimetry
Cycloparaffins
Compressive Strength
Denture Liners
Photoelectron Spectroscopy
Chromatography, High Pressure Liquid
Food Packaging
Tensile Strength
Elastic Modulus
Epoxy Resins
Polystyrenes
Microscopy, Electron, Scanning
Polyethylene Glycols
Ethinyl Estradiol
Estrogens
Acrylamides
Environmental Monitoring
Water Pollutants, Chemical
Light-Curing of Dental Adhesives
Estradiol
Sphingomonas
Adsorption
Estrogen Receptor alpha
Endocrine System
Glass
Estrogen Receptor beta
Differential Thermal Analysis
Nanocomposites
Tissue Conditioning (Dental)
Triclosan
Dental Marginal Adaptation
Histological Techniques
Implants, Experimental
Biodegradation, Environmental
Biofouling
Maternal-Fetal Exchange
Trimethyl Ammonium Compounds
Receptors, Estrogen
Plastics
Microfluidic Analytical Techniques
Bone Cements
Transition Temperature
Histocytological Preparation Techniques
Spectroscopy, Fourier Transform Infrared
Silver
Tissue Expansion Devices
Uterus
Porosity
Plasticizers
Tooth Preparation
Dibutyl Phthalate
Diethylhexyl Phthalate
Boron Compounds
Saliva, Artificial
Polyesters
Prostheses and Implants
Tooth, Artificial
Testosterone Propionate
Drug Carriers
Calcium Phosphates
Dimethylpolysiloxanes
Microfluidics
Antimutagenic Agents
Toxicity Tests
Dental Restoration, Permanent
Acid Etching, Dental
Microtechnology
Gelatin
Nanoparticles
Genista
Quaternary Ammonium Compounds
Rats, Sprague-Dawley
Coated Materials, Biocompatible
Denture Cleansers
Biomimetic Materials
Viscosity
Gas Chromatography-Mass Spectrometry
In vitro comparison of the retention capacity of new aesthetic brackets. (1/354)
Tensile bond strength and bond failure location were evaluated in vitro for two types of aesthetic brackets (non-silanated ceramic, polycarbonate) and one stainless steel bracket, using bovine teeth as the substrate and diacrylate resin as the adhesive. The results show that metallic bracket had the highest bond strength (13.21 N) followed by the new plastic bracket (12.01 N), which does not require the use of a primer. The non-silanated ceramic bracket produced the lowest bond strength (8.88 N). Bond failures occurred mainly between bracket and cement, although a small percentage occurred between the enamel-cement interface with the metal and plastic brackets and within the cement for the plastic bracket. With the ceramic bracket all the failures occurred at the bracket-cement interface. This suggests that the problems of enamel lesions produced by this type of bracket may have been eliminated. The results also show that the enamel/adhesive bond is stronger than the adhesive/bracket bond in this in vitro study. (+info)The crystal growth technique--a laboratory evaluation of bond strengths. (2/354)
An ex vivo study was carried out to determine differences in the bond strengths achieved with brackets placed using a crystal growth technique compared with a conventional acid-etch technique. A solution of 37 per cent phosphoric acid was used for acid-etching and a commercially available polyacrylic acid gel, Crystal-lok for crystal growth. A heavily-filled composite resin was used for all samples to bond brackets to healthy premolar teeth extracted for orthodontic purposes. Polycrystalline ceramic and stainless steel brackets were used and tested to both tensile and shear failure using an Instron Universal Testing machine. The tensile and shear bond strengths were recorded in kgF. In view of difficulties experienced with previous authors using different units to describe their findings, the data were subsequently converted to a range of units in order to facilitate direct comparison. The crystal growth technique produced significantly lower bond strengths than the acid-etch technique for ceramic and stainless steel brackets, both in tensile and shear mode. The tensile bond strength for stainless steel brackets with crystal growth was 2.2 kg compared with 6.01 kg for acid-etch, whilst with ceramic brackets the tensile bond strengths were 3.9 kg for crystal growth and 5.55 kg for acid-etch. The mean shear bond strength for stainless steel brackets with crystal growth was 12.61 kg compared with 21.55 kg for acid-etch, whilst with ceramic brackets the shear bond strengths were 7.93 kg with crystal growth compared with 16.55 kg for acid-tech. These bond strengths were below those previously suggested as clinically acceptable. (+info)Thermal image analysis of electrothermal debonding of ceramic brackets: an in vitro study. (3/354)
This study used modern thermal imaging techniques to investigate the temperature rise induced at the pulpal well during thermal debonding of ceramic brackets. Ceramic brackets were debonded from vertically sectioned premolar teeth using an electrothermal debonding unit. Ten teeth were debonded at the end of a single 3-second heating cycle. For a further group of 10 teeth, the bracket and heating element were left in contact with the tooth during the 3-second heating cycle and the 6-second cooling cycle. The average pulpal wall temperature increase for the teeth debonded at the end of the 3-second heating cycle was 16.8 degrees C. When the heating element and bracket remained in contact with the tooth during the 6-second cooling cycle an average temperature increase of 45.6 degrees C was recorded. (+info)An ex vivo investigation into the bond strength of orthodontic brackets and adhesive systems. (4/354)
The aim of this study was to compare the shear bond strength of Adhesive Precoated Brackets (APC) with that of two types of uncoated bracket bases, Straight-Wire and Dyna-Lock. Two types of orthodontic adhesives were used, Transbond XT and Right-On. Three different curing times were evaluated with the APC brackets in order to find the best. Adhesive remnants on the enamel surface following debond were evaluated using the Adhesive Remnant Index (Artun and Bergland, 1984). Bond strengths ranged from 11.00 to 22.08 MPa. For both types of brackets Transbond produced a significant increase in bond strength compared to Right-On. The Dyna-Lock/Right-On combination produced the poorest results. APC brackets cured for 40 s had similar bond strengths to uncoated brackets fixed by means of Transbond. Overall, 79 per cent of specimens had less than half the tooth surface covered with adhesive following debond. Significantly more adhesive remained on tooth surfaces following debond of the Straight-Wire/Right-On group than any other bracket/adhesive combination. Bond strengths were higher with light-cured Transbond than with chemically-cured Right-On. When Transbond is used in association with APC brackets a 40-second cure time is recommended. (+info)Determination of bisphenol A and related aromatic compounds released from bis-GMA-based composites and sealants by high performance liquid chromatography. (5/354)
Most of the composites and sealants used in dentistry are based on bisphenol A diglycidylether methacrylate (Bis-GMA). Reports revealed that in situ polymerization is not complete and that free monomers can be detected by different analytic methods. Concerns about the estrogenicity of bisphenol A (BPA) and other aromatic components leached from commercial products have been expressed. We studied biphenolic components eluted from seven composites and one sealant before and after in vitro polymerization using HPLC and gas chromatography/mass spectrometry and we investigated how pH modifications affect the leaching of these components. We found BPA (maximal amount 1.8 microg/mg dental material), its dimethacrylate derivative (Bis-DMA, 1.15 microg/mg), bisphenol A diglycidylether (6. 1 microg/mg), Bis-GMA (2.0 microg/mg), and ethoxylate and propoxylate of bisphenol A in media in which samples of different commercial products were maintained under controlled pH and temperature conditions. Our results confirm the leaching of estrogenic monomers into the environment by Bis-GMA-based composites and sealants in concentrations at which biologic effects have been demonstrated in in vivo experimental models. The main issue with implications for patient care and dentist responsibility is to further determine the clinical relevance of this estrogenic exposure. (+info)Effects of composite thickness on the shear bond strength to dentin. (6/354)
The manufacturers of some condensable posterior composites claim that their products can be placed in bulk and light-cured in 5-mm-thick increments. This study compared the shear bond strengths of three composite resins when bonded to dentin in 2- and 5-mm-thick increments. Overall the bond strengths were adversely affected by the composite thickness (p < 0.0001). The shear bond strength of each composite tested was much lower when polymerized in a 5-mm increment than in a 2-mm increment of composite (p < or = 0.0005). The two condensable composites tested had a lower bond strength than the conventional composite when polymerized in a 5-mm bulk increment (p < or = 0.01). (+info)Cytotoxicity of dental resin monomers in the presence of S9 mix enzymes. (7/354)
The purpose of the this study was to evaluate the cytotoxicity of dental resin monomers in the presence of a rat liver S9 mix containing cytochrome P 450 enzymes. JTC-12 cells derived from a monkey kidney were seeded on a 96-well multi-well-plate at 9 x 10(3) cells per well. After cultivation, the S9 mix was added to the wells as an S9 mix group (+S9), and PBS- was added to the other wells as a none-S9 mix group (-S9), then 7 different concentrations of various monomers were added to each well. All the specimens were cultured for another 24 hrs. The cell survival ratios (CSR) were calculated by using a neutral red cytotoxicity assay. CSR for 50 micrograms/mL of Bis-GMA/S9 mix was 92.6% while for none-S9 mix it was 6.6%. The values of CSR for UDMA, Bis-MPEPP, EGDMA, TEGDMA, DMAEM, 4-META and HEMA exhibited a reduction in cytotoxicity in the presence of the S9 mix. There were significant differences between +S9 and -S9 for respective monomers (p < 0.05). However, there were no significant differences between +S9 and -S9 for MMA (p < 0.05). (+info)Analysis of major components contained in Bis-GMA monomer. (8/354)
The major components contained in commercial Bis-GMA monomer were isolated by thin layer chromatography (TLC) and identified by NMR and high resolution mass spectroscopy. In addition to the two major components already known (Bis-GMA and Iso-bis-GMA), an unknown hydrophilic third major component was isolated and identified as 2,2-[4-(2-hydroxy-3- methacryloyloxy-1-propoxy)-4'-(2,3-dihydroxy-1-propoxy)]dipheny lpropane. This compound was designated as BIS-GMA-H, because it has a structure of Bis-GMA with one of which methacrylic ester bond hydrolyzed. (+info)Prenatal Exposure Delayed Effects can affect various aspects of the child's development, including:
1. Physical growth and development: PDEDs can lead to changes in the child's physical growth patterns, such as reduced birth weight, short stature, or delayed puberty.
2. Brain development: Prenatal exposure to certain substances can affect brain development, leading to learning disabilities, memory problems, and cognitive delays.
3. Behavioral and emotional development: Children exposed to PDEDs may exhibit behavioral and emotional difficulties, such as anxiety, depression, or attention deficit hyperactivity disorder (ADHD).
4. Immune system functioning: Prenatal exposure to certain substances can affect the immune system's development, making children more susceptible to infections and autoimmune diseases.
5. Reproductive health: Exposure to certain chemicals during fetal development may disrupt the reproductive system, leading to fertility problems or an increased risk of infertility later in life.
The diagnosis of Prenatal Exposure Delayed Effects often requires a comprehensive medical history and physical examination, as well as specialized tests such as imaging studies or laboratory assessments. Treatment for PDEDs typically involves addressing the underlying cause of exposure and providing appropriate interventions to manage any associated symptoms or developmental delays.
In summary, Prenatal Exposure Delayed Effects can have a profound impact on a child's growth, development, and overall health later in life. It is essential for healthcare providers to be aware of the potential risks and to monitor children exposed to substances during fetal development for any signs of PDEDs. With early diagnosis and appropriate interventions, it may be possible to mitigate or prevent some of these effects and improve outcomes for affected children.
Some common types of deaf-blind disorders include:
1. Usher syndrome: This is the most common form of deaf-blindness and affects approximately 3 to 6 per 100,000 individuals worldwide. It is caused by mutations in genes that are important for hearing and balance.
2. Charcot-Marie-Tooth disease: This is a group of inherited disorders that affect the nerves responsible for hearing and vision. It is the most common inherited neurological disorder and affects approximately 1 in 2,500 individuals worldwide.
3. Bardet-Biedl syndrome: This is a rare genetic disorder that affects approximately 1 in 160,000 individuals worldwide. It is characterized by vision loss, hearing loss, and developmental delays.
4. Alport syndrome: This is a genetic disorder that affects the kidneys, eyes, and ears. It is caused by mutations in the COL4A5 gene and affects approximately 1 in 50,000 individuals worldwide.
5. Other causes of deaf-blindness include infections such as meningitis or encephalitis, injuries to the head or ear, and exposure to toxic substances.
The symptoms of deaf-blind disorders can vary depending on the underlying cause, but may include:
* Vision loss or blindness
* Hearing loss or deafness
* Developmental delays
* Cognitive impairment
* Balance and coordination problems
* Speech and language difficulties
There is no cure for deaf-blind disorders, but there are a variety of treatments and strategies that can help individuals with these conditions to communicate and access information. These may include:
* Assistive technology such as braille, sign language, or communication devices
* Specialized education and training programs
* Speech and language therapy
* Occupational therapy to improve daily living skills
* Physical therapy to improve balance and coordination
It's important for individuals with deaf-blind disorders to receive early and appropriate intervention to maximize their potential for communication, independence, and quality of life.
Bis-GMA
Dental restoration
Glycidyl methacrylate
List of MeSH codes (D25)
List of MeSH codes (D02)
Luting agent
C29H36O8
List of MeSH codes (D05)
Dental composite
IARC group 3
2014 Ju-Jitsu World Championships
Bolley Johnson
Don't Say No
Dewoitine D.371
Noor-ul-Ain
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Santa Cruz Barillas
Maria Margaret Pollen
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We, Too, Have a Job to Do
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Camelpox
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MESH TREE NUMBER CHANGES - 2013 MeSH. August 27, 2012
Glycidyl Methacrylate (GMA) CAS 106-91-2 - Lanhai Industry
DeCS
Búsqueda | BVS Bolivia
Continuous and Short Fiber Reinforced Composite in Root Post-Core System of Severely Damaged Incisors
Radiant exposure effects on physical properties of methacrylate - and silorane-composites
Dental Applications | Leaders in Pharmaceutical Business Intelligence (LPBI) Group
Journal of Conservative Dentistry (JCD): Table of Contents
MESH TREE NUMBER CHANGES - 2013 MeSH. August 27, 2012
Ethanol (definition)
Bromphenol Blue | Profiles RNS
UR PRODUCTS
Patents 5280055 - 5280309
Effects of Cardanol-based Epoxidized Phosphate on the Properties of E-51/IPDA Epoxy Resin System
Concrete Bullfloat - 6 x 48 Inch Aluminum - Ox Tools - Carbour Tools
석유화학사업 - Endo methyltetrahydrophthalic diglycidyl ester
"chid","chnm","casrn","code","clib","iarc","final color","iarc...
Nanomaterials: The Next Step in Injectable Bone Cements
Bond strength of adhesives to dentin contaminated with smoker's saliva - PubMed
RFA-DE-13-001: Design and Development of Novel Dental Composite Restorative Systems (U01)
MeSH Browser
MeSH Browser
Code System Concept
NDF-RT Code NDF-RT Name
Nomination Summary for Dental composites and sealants containing bisphenol A derivatives (N21019)
Pesquisa | Portal Regional da BVS
MESH TREE NUMBER CHANGES - 2013 MeSH. August 27, 2012
MESH TREE NUMBER CHANGES - 2007 MeSH. September 14, 2006
MESH TREE NUMBER CHANGES - 2013 MeSH. August 27, 2012
MESH TREE NUMBER CHANGES - 2013 MeSH. August 27, 2012
MESH TREE NUMBER CHANGES - 2013 MeSH. August 27, 2012
MESH TREE NUMBER CHANGES - 2013 MeSH. August 27, 2012
MESH TREE NUMBER CHANGES - 2013 MeSH. August 27, 2012
MESH TREE NUMBER CHANGES - 2013 MeSH. August 27, 2012
MESH TREE NUMBER CHANGES - 2013 MeSH. August 27, 2012
MESH TREE NUMBER CHANGES - 2013 MeSH. August 27, 2012
Estrogenicity of resin-based composites and sealants used in dentistry. | Environmental Health Perspectives | Vol. 104, No. 3
c33c
COMPOSITE RESINS1
- Methods: Circular specimens (5 x 2 mm) were manufactured from methacrylate and silorane composite resins, and light-cured at 19.8, 27.8, 39.6, and 55.6 J/cm2, using second-generation LED at 1,390 mW/cm2. (bvsalud.org)
Monomers4
- Mainly used in the manufacture of acrylic powder coatings, used as soft monomers to copolymerize with hard monomers such as methyl methacrylate and styrene, which can adjust the glass transition temperature and flexibility, and improve the gloss, adhesion and weather resistance of the coating film Wait. (lanhaiindustry.com)
- These materials are composed basically by polymeric matrix based on methacrylate monomers, inorganic filler particles, silane and photo-initiator system 3 . (bvsalud.org)
- Bis-GMA (bisphenol-A glycidyl dimethacrylate) is the most used monomer in dental composites, however due to its high molecular weight, high viscosity and low mobility, other monomers with lower viscosity and/or higher mobility, as TEGDMA (triethylene glycol dimethacrylate) and UDMA (urethane dimethacrylate), are used to increase the degree of conversion (DC) and crosslinking of the resulting polymer 3,4 . (bvsalud.org)
- Silorane network is generated by cationic ringopening polymerization mechanism instead of free radical curing of methacrylate monomers 8 , and more light-curing time to form cations is required to initiate the polymerization reaction 5 . (bvsalud.org)
Isophorone1
- The curing system of bisphenol A epoxy resin(E-51) and isophorone diamine(IPDA) was modified by CGEP in different mass ratios. (cifp.ac.cn)
Polymerization2
- The reaction product of bisphenol A and glycidyl methacrylate that undergoes polymerization when exposed to ultraviolet light or mixed with a catalyst. (bvsalud.org)
- Methacrylate restorative materials exhibit volumetric polymerization shrinkage 5 , ranging from 1.9 to 3.5 vol% 6 , and a significant proportion of unreacted monomer due to incomplete C=C bond conversion 7 . (bvsalud.org)
Triethylene glycol dimethacrylate2
- The intent of this Funding Opportunity Announcement (FOA) is to support the design and development of novel dental composite restorative systems that demonstrate superiority in material properties and endurance in the oral environment over the currently used bisphenol A glycidyl methacrylate/triethylene glycol dimethacrylate (Bis-GMA/TEGDMA)-based systems. (nih.gov)
- Experimental composite resins composed of 75 wt% Bisphenol A-Glycidyl Methacrylate (BisGMA) and 25 wt% Triethylene Glycol Dimethacrylate (TEGDMA) were produced. (bvsalud.org)
Dimethacrylate1
- Estrogenicity was due to bisphenol-A and bisphenol-A dimethacrylate, monomers found in the base paste of the dental sealant and identified by mass spectrometry. (nih.gov)
Dental1
- Dental composites expose children to bisphenol A and other unstudied compounds. (nih.gov)
Human1
- A sealant based on bisphenol-A diglycidylether methacrylate (bis-GMA) increased cell yields, progesterone receptor expression, and pS2 secretion in human estrogen-target, serum-sensitive MCF7 breast cancer cells. (nih.gov)