Abstract:
OBJECTIVES:The aim of this study was to evaluate, the cytotoxicity of orthodontic composites in vitro as a function of degree of conversion (DC) and the light curing units (LCU) employed on mouse fibroblast (L929). MATERIALS AND METHODS:Cured samples of the composites Light bond (Reliance Orthodontic Products, Itasca, Illinois, USA), Ortho bracket paste (Bisco, Schaumburg, Illinois, USA), Opal bond MV (OPAL, South Jordan, Utah, USA), and Transbond XT (3M, Monrovia, California, USA) were prepared. Polymerization was performed with two LCUs: VALO Ortho (Ultradent, South Jordan, Utah, USA) is a third-generation LCU and Elipar S10 (3M, USA) is a second-generation LCU. Four samples were immersed in cell culture medium to obtain composite extracts. After incubation of L929 cell cultures with the extracts obtained, cytotoxicity was determined using the methyl tetrazolium test. Fourier transform infrared spectroscopy (FTIR) was used to evaluate DC for five samples. A multivariate analysis of variance (ANOVA), two-way ANOVA, and Tukey's honestly significant difference test were utilized for statistical analyses. RESULTS:Cytotoxicity and DC of all tested composites (p < 0.001) and the interaction between composites and LCUs (p < 0.01) were significantly different. LCUs had no significant influence on the cytotoxicity and DC of composite materials (p > 0.05). The correlations between cell viability and DC were positive for three composites but statistically insignificant. CONCLUSION:Composites and LCUs must be matched with one another to result in satisfactory maximal biocompatibility and DC. Opal Bond plasma light-emitting diode combination was a better choice for cell viability. Three composites showed a positive correlation between cytotoxicity and DC. Therefore high-intensity LCUs can be said to efficiently affect polymerization, and so, higher DC rates may achieve higher cell viability rates.
journal_name
Hum Exp Toxicoljournal_title
Human & experimental toxicologyauthors
Cörekçi B,Irgın C,Halıcıoğlu K,Dursun S,Yavuz MZdoi
10.1177/0960327113520020subject
Has Abstractpub_date
2014-10-01 00:00:00pages
1000-7issue
10eissn
0960-3271issn
1477-0903pii
0960327113520020journal_volume
33pub_type
杂志文章abstract::Lead exposure was assessed in a random cohort of 70 male papier mâché workers and compared with 35 age and sex matched controls. Blood-lead levels in workers were significantly higher than in controls (Mean 68.07 +/- 44.64 ug/dl vs 25.52 +/- 16.56 ug/dl respectively; P < 0.001). Urinary lead was also higher in workers...
journal_title:Human & experimental toxicology
pub_type: 杂志文章
doi:10.1177/096032719701600510
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journal_title:Human & experimental toxicology
pub_type: 杂志文章
doi:10.1191/096032701678227686
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journal_title:Human & experimental toxicology
pub_type: 杂志文章
doi:10.1177/0960327119828198
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abstract::Arsenic trioxide (As2O3) is utilized for treating patients suffering from hematological malignancies particularly acute promyelocytic leukemia. Unfortunately, the extensive application of this chemotherapeutic agent has been limited due to its adverse effects such as cardiotoxicity. Ellagic acid, as a phenolic compoun...
journal_title:Human & experimental toxicology
pub_type: 杂志文章
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abstract::Iodine-125 HIPDM was evaluated as a screening agent for studying multiorgan toxicity due to Cyclosporine-A (CsA) and the results were compared to histopathological findings of the tissues. The rats were injected subcutaneously with 50 mg/kg (body weight) of CsA or with equal volume of the vehicle, Cremophor-EL, for 7 ...
journal_title:Human & experimental toxicology
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abstract::1. In humans CaNa2EDTA increases urinary excretion of lead as well as that of essential metals such as zinc, ferrum and manganese but not that of copper. 2. We studied the effect of CaNa2EDTA injection on serum dopamine-beta-hydroxylase, a copper-dependent enzyme, in three male lead welders hospitalized for suspected ...
journal_title:Human & experimental toxicology
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abstract::1. The methods used to evaluate the toxicological effects of PCBs in animals have been reviewed. 2. The data show that Toxic Equivalency Factors (TEFs) could be developed to assess the potential toxicity of PCB mixtures for certain specific target organ effects (such as the liver and immune system) but would be inappr...
journal_title:Human & experimental toxicology
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abstract::Pharmaceutical research and new drug development rely extensively on animal research. The development of novel agents for intrathecal administration requires preclinical studies of toxic effects in an animal model. We have developed a nonrodent animal model for this purpose. Our sheep model: 1 Is an animal whose neura...
journal_title:Human & experimental toxicology
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journal_title:Human & experimental toxicology
pub_type: 临床试验,杂志文章
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journal_title:Human & experimental toxicology
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doi:10.1177/0960327115626254
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pub_type: 评论,杂志文章,评审
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journal_title:Human & experimental toxicology
pub_type: 杂志文章,多中心研究
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更新日期:1994-12-01 00:00:00
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journal_title:Human & experimental toxicology
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更新日期:2012-09-01 00:00:00
abstract:BACKGROUND:Deliberate self-poisoning (DSP) is a major health problem with increasing incidence mainly among young people. OBJECTIVE:To examine the clinical and toxicological characteristics of DSP, it is compared to unintentional (non-DSP) exposures and those characteristics which might be associated with increased to...
journal_title:Human & experimental toxicology
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journal_title:Human & experimental toxicology
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journal_title:Human & experimental toxicology
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更新日期:1991-09-01 00:00:00
abstract::Inhalation of zinc fumes may lead to the acute respiratory distress syndrome. The mechanisms of pulmonary zinc toxicity are not yet understood. Therefore we investigated zinc-dependent depression of protein and RNA synthesis in rat and human lung cell lines. 1. After exposure to 120 or 150 micromol/l zinc, RNA synthes...
journal_title:Human & experimental toxicology
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更新日期:1998-12-01 00:00:00
abstract:BACKGROUND:The widespread use of synthetic cannabinoids (SCs) among youth has become an important public health problem. Several life-threatening side effects of SC have been reported, including cardiovascular, gastrointestinal, neurological, renal, metabolic, ophthalmologic, and pulmonary effects, besides skin toxicit...
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abstract::This study investigated the main target sites of chlorpyrifos (CPF), its effect on biochemical indices, and the pathological changes observed in rat liver and kidney function using gas chromatography/mass spectrometry. Adult female Wistar rats (n = 12) were randomly assigned into two groups (one control and one test g...
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abstract::The present study has three purposes; first evaluating cytotoxicity of (E)-4-chloro-2-((3-ethoxy-2-hydroxybenzylidene)amino)phenol (ACES), second deciphering ACES-mediated cellular death mechanism, and third estimating ACES-mediated alterations in the expressions of mitogen-activated protein kinase (MAPK) pathway-rela...
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abstract::3,4-Methylenedioxymethamphetamine (MDMA) is a powerfully addictive psychostimulant with pronounced effects on the central nervous system, but the precise mechanism of MDMA-induced toxicity remains unclear, specifically on the retina. This study was performed to investigate the effects of MDMA treatment on the retina a...
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abstract::The current study was undertaken to evaluate the effect of combined therapy of gabapentin and pantoprazole against forestomach and pylorus ligation-induced gastric esophageal reflux disease (GERD) in albino Wistar rats. Rats were randomly divided into five groups, each group consisting of six rats, fasted for 24 h, un...
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