dr. saeed asgari

Identifying and developing superior talents doubles the importanceof educational planning.The purpose of this plan is to find laws in the field of superior talent that are incompatible with the logic of following educational justice in academic environments and to suggestfor reform have been presented.

This qualitative study was conducted in 2022using the content analysis method. Targeted interview sessions were held with assistants and students who were members and non-members of gifted students offices as well as the heads of these offices in major universities of medical sciences. Primary conceptual codes were extracted after data analysis, and after continuous review and assessing similar codes, summarization, and removal of duplicate codes, four main categories and 14 subcategories were identified.

Students emphasized the need to change the conditions of membership in gifted students offices and to identify talents during their studies according to their efforts and scientific and research abilities.While requesting coordination between the educational and executive institutions of the country, they inquired forcreatinga stronger foundation for the officials of the ministries, so that they could have a greater impact on the scientific and cultural promotion of the country.

Senior educational managers should pay attention to solving the structural problems of the units and revising the regulations, motivational inducers, and the social and cultural needs of talented students. While requesting the generalization and changes of the statements mentioned in related regulations, the students agreed with establishment of elite assessment centers in metropolitan areas with the same guideline. It is suggested that the Office of Elites and Talented Students of the relevant ministry, be in charge of forming specialized groups of talented students from medical sciences universitiesin cooperation with one of the leading educational institutions in the country; so that these students have closer contact with the relevant ministryofficials and participate more actively in solving educational, research-related and executive problems.

Nanocomposite anion exchange membranes were prepared using polymeric blend of poly(vinyl chloride) and poly(methylmetacrylate) by solution casting method. Also functionalized carbon nanotubes were used as additive. The carbon nanotube nanoparticles were modified using acid mixtures and ethylenediamine solution and then the structure and morphology of prepared functionalized carbon nanotubes were studied using infrared spectroscopy (FT-IR) and field-emission scanning electron microscopy (FE-SEM). The study of the physicochemical and electrochemical properties of prepared membranes showed that the water content, ion exchange capacity, membrane potential, transport number, surface charge density and permselectivity of them were improved by adding up to2% by weight of carbon nanotubes. Also, the permeability, flux, electrical resistance and chemical stability of prepared membranes with carbon nanotube increased compared to the nanotube-free membranes.In fact, the high active level and the effect of the functionalized carbon nanotube on increasing the hydrophilicity and the transfer properties of the membranes have created suitable ion channels and facilitated ion transport. By adding nanoparticles up to 4% by weight, the electrochemical properties of the prepared membranes were reduced slightly. This can be attributed to the blockade of functional groups by nanoparticles and the accumulation of carbon nanotubes.

Given the importance of attachment styles and mental health in different areas of life including interpersonal relationships, especially marital and family relationships, which is more important, the present study examines the role of attachment styles and mental health in Interpersonal relationships will be addressed by students. The research design method is descriptive multiple regression. The statistical population included all male and female undergraduate students of Razi University Social Sciences who visited the library of this school. From this population, 100 individuals (50 girls and 50 boys) were selected from non-probability type of study and Barton's Communication Skills Questionnaire (1990), Goldberg's Mental Health Questionnaire (1972), and the Hazen & Shaver Attachment Test (1990). 1987), performed on them. Data were analyzed using multiple regression statistical methods. The hypothesis of the present model was generally confirmed at level (p <0.001), and partially confirmed by secure attachment at level (p <0.001) and mental health at level (p <0.04). Thus, secure attachment style and mental health are powerful predictors for interpersonal relationships, and we conclude that structured education about the three variables mentioned can lead to the formation of a healthy family system. In turn, it creates a happy, healthy and growing community.

In this paper to find links between stress-coping style and crime tendency among male adolescents 308 intermediate school boys were selected in Kermanshah. The results of this research suggest that there is a relation between positive tendency towards crime and adolescents’ age. Furthermore, it is believed that avoidance-focused copying style and emotional-focused copying style can predict positive tendency towards crime, but problem-focused coping style predicts negative tendency to crime.

The aim of this study was to evaluate the antimicrobial activity of Mineral Trioxide Aggregate (MTA) and Calcium Enrich Mixture) CEM (mixed with different concentrations of chlorhexidine (CHX). Cements used in this in vitro study included Gray proRoot MTA and CEM with the microorganisms being entrococcus faecalis, streptococcus muntas, Candida albicans, Actinomyces, Escherichia coli, and a mixture of these microorganisms. CHX was used in the form of liquid at 0.2%, 2%, and 0.12% concentrations. Contact dilution and colony count method was used to evaluate the antibacterial activity of these cements. After 0, 24, 48, 72, and 96-hour intervals, we cultured the samples on blood agar medium. Colonies were counted after incubation at 37°. Data were statistically analyzed by a Kruskal-Wallis test to compare the antimicrobial activity of MTA and CEM. All concentrations of CHX were mixed with MTA and the CEM had antibacterial activities on all microorganisms’ strains except for the Enterococcus faecalis and the mixture group. MTA had better antibacterial activity than the CEM, but this difference was not significant (P = 0.13). The mixing of MTA and the CEM with CHX significantly increased the antibacterial properties of both cements (P < 0.03). There was no statistically significant difference between the different concentrations of CHX. The antibacterial activity of the materials increased through time. The mixture of MTA and CEM with different concentration of CHX significantly increased the antibacterial activity.

The main goal of this ex vivo study was to assess and compare the cellular and electrophysiological effects of two dental biomaterials, white mineral trioxide aggregate (WMTA) and calcium enriched mixture (CEM) cement, on neuronal cell excitability and electrical properties. A conventional intracellular current clamp technique was used to study the cellular effects of WMTA and CEM on the excitability, firing and the shape of action potential of neuronal soma membrane of F1 nerve cells. The dental biomaterials were prepared according to the manufacturer's directions and were applied to the bathing media and 0.05 mL of total mixture of each dental material at a distance of 3 mm from the cells. Findings indicated that exposure to both dental biomaterials shifted the irregular high frequency firing type observed in control conditions to a more regular low frequency firing pattern. Neuronal exposure to WMTA, but not CEM, significantly hyperpolarized the cell resting membrane potential. Both treatments significantly influenced the duration and the amplitude of action potentials. Extracellular application of either CEM or WMTA caused a significant increase in the after hyperpolarization (AHP) amplitu de and AHP area, but the potentiating effect of WMTA was more effective than CEM. Treatment with WMTA or CEM resulted in a profound alteration in the firing behaviour of F1 cells and changed the AP characteristics. Both dental biomaterials reduced the neuronal activity possibly through enhancement of K+ outward current. This may possibly explain the positive mechanisms of these biomaterials in regenerative endodontics, though further research is needed for such a conclusion.

It is difficult and sometimes impossible to predict the degree of damage and prognosis of tooth vitality after a carious dental pulp exposure. This predicament is exacerbated by the fact that clinical signs and symptoms do not correlate closely with the histopathological status of the pulp. As clinicians, we are keen to be conservative to maintain pulp vitality; however we must also remove all the infected tissue. Vital pulp therapy (VPT) aims to remove infected dentin, and bacteria, and at the same time to maintain pulp vitality by using a biocompatible material to seal off the pulp and restore the tooth’s strength and function. In the past, calcium hydroxide was used as a biocompatible pulp capping/pulpotomy agent. This has now been generally replaced with either MTA or Calcium Enriched Mixture (CEM) cement. These new biomaterials have good sealability and regenerative abilities, even superior to the traditional material used for VPT; for example, they can induce the production of greater and better quality reparative dentine. CEM cement has been clinically assessed for different VPT treatments such as direct pulp capping and pulpotomy treatments and therefore, its use for different VPT treatments is recommended.

The main goal of endodontic treatments is eliminating the etiologic factors of pulpal and periapical diseases as well as maintaining this condition via providing a hermetic seal between periodontium and root canal system. If these were not possible through orthograde approach, periradicular surgery and root-end filling are indicated. Review of Literature: Different materials have been used as root-end fillings. Amalgam, in 1884, and some other materials were used thereafter for root-end filling. A search in medical data bank provides hundreds of articles related to endodontic surgeries and root-end filling materials however, there are less than 10 review articles which compare these materials and also there is just one systematic review in this field. Additionally, there is no Meta-analysis with reference to this subject due to scarcity of Randomized Clinical Trials. In this article, we focus on favorable properties of root-end fillings as well as introducing different types of these materials and the ideal choice for endodontic surgeries. Dentists should be informed about different properties of an ideal root-end filling so that they can choose and utilize a favorable material in endodontic surgeries. Since the histological evidences declare successful treatment results for MTA and CEM cement, due to cementogenesis over their surfaces, these biomaterials are recommended for clinical use.

This study was carried out for comparison of MTA and Root MTA (RMTA) by scanning electron microscope and energy dispersive spectrometer X-ray analysis. Method & Materials: In this research two resin discs were used and in each disc three cavities with three mm depth were prepared. In each disc the cavities were filled with one type of MTA and incubated in 37C for 48 hours. Then, they were polished, carbon coated, observed and analyzed by the scanning electron microscope and the X-ray energy dispersive spectrometer. In both types of the cements results showed that calcium oxide (lime-CaO), silica (SiO2) and bismuth oxide (Bi2O3) were the most component respectively. The amount of minor elements (Al2O3, MgO and FeO) was very lower in RMTA in comparison with MTA. There were some similarity and differences in the amount of trace elements in both types of cements. There is a slit difference between the amounts of major elements in both types of MTA cements, but the amount of minor elements has a significant difference.Keywords:

The most detailed information about neural activity comes from intracellular recording. Not only this technique shows the pattern of neural action potential, but it also records the cellular events which give rise to the action potential, including variations in the resting potential, changes in cellular resistance and synaptic potentials. Using this method with manipulation of the composition of the bathing solution (changing ionic concentrations or adding drugs) the ionic mechanisms responsible for these potentials can be identified. It is also possible to investigate the mechanisms of actions of drugs such as dental sealers on neuronal excitability. In the present study, intracellular recording technique has been introduced in dental materials research as a valuable method to determine the neurotoxicity of endodontic sealers on neuronal cells.

Case Report: A case report is presented involving the endodontic treatment of a maxillary secon molar with an unusual morphological variation of the palatal roots. The palatal root canal systemn were characterized by two separate canal orific and two separate apical foramina in two separate roots. Statistics of morphological variations are irrelevant when the involved tooth is an anomaly.