Search results for "RAM"
showing 10 items of 35643 documents
Simulated root canals preparation time, comparing ProTaper Next and WaveOne Gold systems, performed by an undergraduate student
2020
Background: The aim of this study was to compare the WaveOne Gold and ProTaper Next systems regarding the time spent preparing simulated canals performed by an inexperienced student. Material and Methods: 80 simulated L-shaped canals were randomly divided into two groups (n = 40) and numbered in order of instrumentation. Canals were instrumented with WaveOne Gold (group 1) and ProTaper Next (group 2) systems. The effective instrumentation time and the number of instrumentation cycles were recorded. All procedures were performed by the same operator. Statistical analysis was obtained by the Mann-Whitney, Kruskal-Wallis test with significance of p <0.05. Results: There were no statistically s…
An innovative risk-scoring system of dental procedures and safety protocols in the COVID-19 era
2020
Abstract Background The aim of this paper is to assess an innovative risk score for common dental procedures, based on the most recent contaminant SARS-CoV-2. After scoring the level of infection risk, safety procedures, advice and personal protective equipment (PPE) are recommended for the dental team in each dental practice. Methods The authors of this research analysed 42 common dental procedures on the basis of known transmission risks. In increasing order, many consider the parameters leading to different risk scores for the dental team and patients for each procedure to be: direct contact with saliva (score 1), direct contact with blood (score 2), production of low levels of spray/aer…
Internet addiction, temperament, and the moderator role of family emotional involvement
2014
This study examined the relationship between internet addiction, temperament, and family functioning focusing on the unique and common contribution that temperament and family functioning made to internet addiction. A total of 320 adolescents (164 boys and 156 girls), from 15 to 17 years (M = 16.06, SD = 0.59), completed measures of internet addiction, temperament, and family functioning. Data showed that salience, as the ability of internet to change negatively person’s life, was predicted positively by temperament linked to lack of control and by the perception of low level of familial emotional involvement. Results also revealed that family affective involvement played a moderating role …
Characterization of endogenous noradrenaline release from intact and epithelium-denuded rat isolated trachea.
1991
1. Overflow of endogenous noradrenaline (NA) from the in vitro incubated rat trachea evoked by two periods of electrical field stimulation (S1, S2 at 3 or 15 Hz) or by high potassium (60 mM) was determined by high performance liquid chromatography (h.p.l.c.) with electrochemical detection. 2. In the presence of the neuronal uptake inhibitor desipramine, the alpha 2-adrenoceptor antagonist, yohimbine, enhanced the overflow of NA evoked by stimulation at 3 Hz by about 100% suggesting the presence of presynaptic inhibitory autoreceptors on the sympathetic nerves innervating the trachea. 3. When desipramine and yohimbine were present throughout the experiments, the overflow of NA evoked by the …
0437: SYNTAX score is associated with in-hospital mortality as assessed by GRACE risk score in patients with acute myocardial infarction
2014
BackgroundCurrent guidelines for the management of patients with acute myocardial infarction (AMI) recommend the GRACE score for risk stratification with assessment of admission variables. The syntax score (SS) is a comprehensive angiographic scoring system that is derived entirely from the coronary anatomy and lesion characteristics. We investigated the relationship between severity of coronary artery disease (CAD) assessed with SYNTAX Score (SS) and GRACE Score (GS) in patients with AMI.Patients and MethodsFrom the obseRvatoire des Infarctus de Côte d’Or (RICO) survey, 614 consecutive patients hospitalized for an AMI from 1st march 2011 to 30 august 2012 and who underwent coronary angiogr…
Endothelial modulation of 5-hydroxytryptamine-induced contraction in goat cerebral arteries.
1993
Abstract 1. 1. In isolated goat middle cerebral artery segments, 5-hydroxytryptamine (5-HT, 10 −8 −3 × 10 −5 M) caused concentration-dependent contractions, with EC 50 = 2.1 (1.9−2.5) × 10 −7 M and E max = 60 ± 2% of 50 mM KCl-induced contraction. 2. 2. Mechanical removal of endothelium significantly increased the E max (91 ± 8%) and did not change the EC 50 value of 5-HT-elicited contractions. 3. 3. Incubation of unrubbed arteries with the irreversible inhibitor of EDRF, gossypol (10 −5 M), significantly increased the contractile response to 5-HT ( E max = 77 ± 4%). 4. 4. Incubation of unrubbed arteries with the competitive inhibitor of the NO synthesis, N G -nitro - l -arginine (L-NOARG) …
Metabolic mediators of the effects of body-mass index, overweight, and obesity on coronary heart disease and stroke: a pooled analysis of 97 prospect…
2014
Summary Background Body-mass index (BMI) and diabetes have increased worldwide, whereas global average blood pressure and cholesterol have decreased or remained unchanged in the past three decades. We quantified how much of the effects of BMI on coronary heart disease and stroke are mediated through blood pressure, cholesterol, and glucose, and how much is independent of these factors. Methods We pooled data from 97 prospective cohort studies that collectively enrolled 1·8 million participants between 1948 and 2005, and that included 57 161 coronary heart disease and 31 093 stroke events. For each cohort we excluded participants who were younger than 18 years, had a BMI of lower than 20 kg/…
Indomethacin treatment in amphotericin B induced nephrogenic diabetes insipidus.
1994
Nephrogenic diabetes insipidus (NDI) is a serious side effect of various drugs. Elevated renal prostaglandin E2 levels have been found in patients with lithium-induced NDI and have been implicated in the pathogenesis. We report the case of a patient who developed NDI following treatment with amphotericin B. Prostaglandin levels were elevated. Indomethacin had an antidiuretic effect and normalized prostaglandin levels.
Lipid triad or atherogenic lipoprotein phenotype: a role in cardiovascular prevention?
2005
The term "lipid triad" or "atherogenic lipoprotein phenotype" has been introduced to describe a common form of dyslipidemia, characterized by three lipid abnormalities: increased plasma triglyceride levels, decreased HDL-cholesterol concentrations and the presence of small, dense LDL particles. It has been suggested that the clinical importance of the atherogenic lipoprotein phenotype probably exceeds that of LDL-cholesterol, because many more patients with coronary artery disease are found to have this trait than hypercholesterolaemia. There is a body of evidence that therapies effective against plasma HDL-cholesterol and triglycerides are associated with a strong reduction of cardiovascul…
Update on the role of the atherogenic lipoprotein phenotype in cardiovascular prevention
2009
Higher plasma triglyceride levels and decreased HDL-cholesterol concentrations are usually accompanied by the presence of small, dense LDL in the so-called lipid triad or ‘atherogenic lipoprotein phenotype’. This phenotype is highly atherogenic and its prevalence may suggest an even higher overall burden of atherosclerotic disease as compared with that associated with hypercholesterolemia. As stated by the National Cholesterol Education Program Adult Treatment Panel III, there is evidence suggesting each component of this lipid triad is individually atherogenic. However, the relative contribution of each component cannot be easily determined. Therefore, it has been suggested to consider th…