1 2008-4676 دانشگاه ازاد اسلامی-واحد دندانپزشکی 1105 Dental EDu Modification of writing pattern of dental articles based on MeSH GhaziMirsaeid Seyed Javad Masoudi Fatemeh 1 9 2020 17 3 168 170 13 01 2020 22 09 2020 در سالهای اخیر، تحقیقات مختلفی به منظور شناسایی سطح دانش مولفان مقالات حوزه های پزشکی و وابسته به آن در استفاده از ابزار نمایه‏سازی MeSH از طریق مقایسه کلیدواژه‏های مقالات با MeSH انجام شده است. بر پایه این مطالعات پایین بودن میزان همخوانی کلیدواژه‏های مقالات با   MeSH ناشی از دو عامل: عدم آگاهی و عدم مراجعه نویسندگان به MeSH ، عدم وجود خط مشی روشن در ارتباط با نحوه استفاده از MeSH در سیاست هیات تحریریه مجلات معرفی شده است (1,2,3( با اینحال تاکنون پژوهشی انجام نشده که صحت این گفته را تایید یا رد نماید، تا بتواند بین عدم آگاهی و عدم تسلط به نحوه انتخاب کلیدواژه از MeSH تمایز قائل شود. از این رو، بر پایه جدیدترین پژوهش انجام شده در این حوزه (2) به بررسی دقیق از انواع همخوانی مشاهده شده بین کلیدواژه های مقالات مجلات دندانپزشکی ایرانی مورد مطالعه در پژوهش مذکور با MeSH پرداختیم تا مشخص شود حضور کلیدواژه‏های ناهمخوان با MeSH ناشی از چیست؟
1130 Prothesis Evaluation of antifungal and antibacterial properties of adding Ag, ZnO, Chitosan nanoparticles to tissue conditioners of complete dentures: Mousavi Seyyed Amin khoramdel azin Aghajanzadeh Hamed 1 9 2020 17 3 171 181 18 05 2020 22 09 2020 Introduction: Chitosan has the property of inhibition of the growth of many pathogenic bacteria and fungi. Tissue conditioners are good substances for the growth and colonization of a variety of micro-organisms. The aim of this research was to investigate the antibacterial and antifungal properties of Chitosan, ZnO and Ag nanoparticles added to tissue conditioners. Methods: In this clinical trial study, 42 patients were randomly divided into 7 groups. In first group, the patients received the tissue conditioners (control group) and the second to seventh groups received the tissue conditioners included Chitosan, ZnO and Ag by weight percentage of 0.675, 1.25, 2.5, 5, 10, 20. After 24 and 48 hours using these substances, the microbial culture inside the mouth and denture was done by sterile swap. Results:  Complete inhibition of growth at 24 h and 48 h occurred in Candida albicans at 2.5 % concentration and in Enterococcus faecalis, Pseudomonas aeruginosa and Streptococcus mutans at 5% concentration of Chitosan, ZnO and Ag nanoparticles. Over time, the growth rate of Candida albicans, Enterococcus faecalis, Pseudomonas aeruginosa and Streptococcus mutans was decreased. Conclusion: Increasing the concentration of nanoparticles increases the growth inhibition in all studied microorganisms. By increase of growth inhibition, the growth of microorganisms also increases. An enhancement of 5% in the concentration of tissue conditioners results in complete inhibition of the studied microorganisms.   1125 Endo Evaluation of Canal Transportation and Centering Ability of Safesider and K-Flexofile: Using Cone-beam Computed Tomography Zargar Nazanin g Peymanpour Payam Valizadeh Solmaz i Seyedsalehi Sima sadat j Soltaninejad Fatemeh k g Shahid Beheshti University of Medical Sciences i Shahid Beheshti University of Medical Sciences j Tehran medical sciences, Islamic azad university k Shahid Beheshti University of Medical Sciences 1 9 2020 17 3 182 191 27 04 2020 22 09 2020 Background and aim: Maintaining the original geometry of canal is an important parameter in successful root canal treatment. The aim of this original study was evaluation of apical root canal transportation and centering ability of SafeSider and K-Flexofile using cone beam computed tomography. Materials and Methods: Mesiobuccal root canals of maxillary first molars, with 20-40° curvature, were selected and randomly divided into two groups (n=20). The first group was prepared with K-Flexofile with passive step-back technique and the second group was prepared with SafeSider system. Canal transportation and centering ability was measured using pre- and post-operative CBCT images of the apical 4 mm of the roots taken at 1 mm intervals. Repeated measure ANOVA and Independent T-test were performed to compare data. Results: The reciprocating SafeSider system transported root canals significantly more than K-Flexofile in the apical 2 mm level and mesiodistal direction (P = 0.006). Centering ability of K-Flexofile in the apical 1 mm level and buccolingual direction was significantly better than SafeSider system (P =0.003). Conclusion: Manual preparation with K-Flexofile was better capable of maintaining the original geometry of canal and showed better centering ability and less apical root canal transportation than SafeSider system. 1137 Oral Medicine In vitro comparison of Anti-Candidal Activity of cinnamon and Querques infectoria hydroalcholic extracts with nystatin in treatment of denture stomatitis mahdavi farideh l amirkhani alireza m owlia fatemeh n l yazd shahid sadoughi university of medical science m yazd shahid sadoughi university of medical science n yazd shahid sadoughi university of medical science 1 9 2020 17 3 192 200 16 06 2020 22 09 2020   Background and Aim: Candida albicans play the main role in the onset, preservation and progression of denture stomatitis. Therefore, the present study was conducted with the aim of comparing the anti candidal effect of cinnamon and Querques infectoria extracts with nystatin for treatment of denture stomatitis. Materials and methods: In this experimental study, 43 patients with clinical diagnosis of denture stomatitis were selected and maxillary dentures were taken for 24 hours. Dentures randomly were divided into three groups of 14 tests and one denture was considered as a negative control group for immersion in distilled water. From the tissue surface, all dentures were sampled with swab and the samples were transferred to the laboratory after transfer to the culture medium and the colony count (CFU / mm2) was measured. Then, each of the 14 denture groups were immersed in a hydroalcoholic solution of cinnamon (70%), a hydroalcoholic solution of Querques infectoria (70%) and nystatin suspension for 24 hours. After 24 hours, repeat sampling and colony count was measured and then the colony count before and after immersion was compared. Data was analyzed using SPSS17 statistical software, Chi-square, Fisher exact tests and ANOVA. Results: There was no significant difference between the three groups obtained colony counts of Candida albicans from dentures (P-value = 0.01). Conclusion: Both herbal extracts could be effective on treatment of denture stomatitis. It should be more evaluated in future studies.     1139 oral patho Study of Antifungal effect of Punica Granatum alcoholic extract on Candida Albicans (invitro study) titidej azadehzeinab alizadeh koshkohi safarali ashori adeleh azmoudeh faezeh 1 9 2020 17 3 201 207 22 06 2020 22 09 2020 Background & Aim: Oral diseases affect the majority of the population and can affect a person’s overall health. It is reported that punicagranutum contain phytomedicinecapabale  of  suppressing oral pathogens associated with fungal diseases. The aim of this study is the assessement of punicagranutm extract antifungal activity on Candida albicans. Material and methods: This study was performed in Qazvin University of Medical Sciences in 2019 The70% ethanol extract of punicagranutum was purchased from the Research Institute of Chemical Industry Development and then made in 1- 1/2048 mg/ml concentrations.The antifungal activity of the extractwas examined by determining the MIC (minimum inhibitory concentration) using the Macrobroth dilution method, means macroscopic examination of the test tubes containing serial dilutions of extract and candida albicans to determine the growth or lack of growth of microorganisms through the ¬eye, and MFC (Minimum Fungicidal Concentration) was determined by preparing the subculture of the contents of all of the undeveloped tubes in a MIC experiment in a solid culture. Also, the non-growth aureole diameter with Agar well diffusion method was obtained by preparing wells in a solid culture medium  And pouring different dilutions of the extract into it and measuring the non-growth aura's diameter.Data were analyzed using ANOVA, post-hoc tests  (p<0.05). Results: Results showed that the ethanol extract of punicagranutumhad inhibitory effect in concentration of   mg/ml and fungicidal effect in concentration of  mg/ml in which the most of this effect is due to punica granutumbut not theethanol.Also, the mean of maximum non-growth aureole diameter was 21 mm at a concentration of 1 mg / ml. Conclusions: Comparison of the results of ethanol control group and test group showed that inhibitory and fungicidal effect of hydroalcoholic extract of punicagranutum is not due to Ethanol and the punicagranutum and Ethanol extracts of punicagranutum has antifungal effect on Candida albicans. 1120 Pediatrics Association between morning feeding and other demographic factors with dental caries in 9 years old, Zahedan students honarmand marieh shirzaiy masoomeh Amiri Tehrani narjes sajedi ahmad medical sciences medical sciences medical sciences medical sciences 1 9 2020 17 3 208 218 05 04 2020 22 09 2020   Background and Aims: Dental caries is a multi-factorial disease Demographic factors, also diet particularly breakfast  which  is an important meal are  factors affecting the level of dental caries. The purpose of this study was investigation  relationship between morning feeding and other demographic factors with  tooth decay in  9 years old Zahedan students Materials and Methods: In This descriptive – analytical and cross-sectional study, Zahedan city  divided into four regions based on population table.From each region one public and private school (boy &girl), randomly selected,. for 400 boy& girl students  9 years old was filled the questionnaire about demographic factors, and   breakfast consumption  and oral examination was done for evaluation of  dmft, DMFT and OHI-s criterias by a dentist  . Data  were analyzed  with  soft ware  spss 21  and t-test , ANOVA and Pearson correlation.. Results: The  Mean dmft, DMFT in children served breakfast (5.22±2.5 and 1.34±1.4 ( and in  children  did not consume breakfast (4.5±2.5 and 1.39±1.44) had no significant difference (p>0.05) but  the mother's occupation and, father education had significant correlation  with DMFT and  mother  education had significant correlation with  DMFT,,dmft (P <0.05) Conclusion: breakfast  consumption and its type  was not effective in reducing the level of dental caries. Children with educated mothers had  low permanent and  insidious dental caries and tooth decay  was significantly  lower in children with  employer or teacher  mothers and    educated fathers  .   1104 Oral Medicine Evaluation of oral health indices in people referring to outpatient addiction treatment centers in Yazd kheirollahi khatereh Mehravar fatemeh nazari sheida Department of Oral Medicine, Shahid Sadoughi University of medical sciences, Yazd, Iran pediatric dentistry department,dental school , Shahid Sadoughi University of Medical Sciences Shahid Sadoughi University of Medical Sciences 1 9 2020 17 3 219 228 13 01 2020 22 09 2020 Background and Aim: Introduction: Drugs have a direct and indirect effect on oral health. Oral problems can affect and impair consumers' quality of life. Therefore, the present study aimed to evaluate oral health indicators in outpatient addiction treatment centers. Material and methods: In this descriptive cross-sectional study, 150 addicts referred to three public drug addiction treatment centers in 2019 were studied. The questionnaire consisted of three sections; part 1: demographic information (age, sex, marital status, education, economic status), part 2: information on tobacco use history, types of consumables and methods of consumption, and part 3 Measurement of DMFT indices And Plaque Control Record was used. Data were analyzed using T-test, ANOVA and Spearman correlation coefficients. Results: In this study, 150 people were included. Of these, 125 were men (92.6%) and 10 were women (7.4%). The mean age±sd addicts was 33.07 ± 10.92 years with a range of 68-13 years. The mean ±sd DMFT was 16.04 ± 9.36 with a range of 32-22 and the mean±sd Plaque Control Record index was 18.92 ± 7.44 with a range of 39.5-5.12. Conclusions: Drug use increases DMFT and Plaque Control Record indices. It seems that the oral health needs of the drug addict population are widespread and need to be pursued.       1091 oral patho The Evaluation of: General Dental practitioner Knowledge in Isfahan about Odontogenic cyst and tumor kalbasi gharavi nader jahanshahi gholamreza dadellahi sarab yaser ahmadifard zahra School of Dentistry, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran School of Dentistry, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran School of Dentistry, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran School of Dentistry, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran 1 9 2020 17 3 229 235 11 12 2019 22 09 2020 Background and Aim: Odontogenic cysts are divided into different types of developmental and inflammatory growth.Odontogenic tumors comprise a complex group of lesions.The aim of this study was to evaluate the knowledge of general dentists working in Isfahan of common odontogenic cysts and tumors. Material and Methods: The statistical population of Isfahan general dentists and the number of samples was 199.Standard self-made questionnaires were used to assess the level of knowledge of dentists and paired analytical tests T and T and analysis of variance were used for statistical evaluations. Result: The mean score of knowledge about cysts (52.9±9.8) and tumors (33.8±21.6) was statistically significant,There was a significant difference between dentists' knowledge about cysts and tumors,Dentists were moderate for cysts and poor for tumors.Independent t-test showed that dentists' knowledge score about cysts and tumors was not significantly correlated with gender (P=0.22, P=0.21).One-way ANOVA showed that dentists' knowledge about cysts and tumors was not significantly correlated with the university of study (P=0.73, P=0.49),The results also showed that the mean score of dentists' knowledge was significantly correlated with the year of graduation (P = 0.001, P = 0.04)and the highest score was for graduates 69-80years and the lowest score was for graduates 86-90 years. Conclusion:The results showed that the level of knowledge of most dentists in Isfahan about cysts was moderate and that of tumors was poor. The mean score of dentists' knowledge about cysts was significantly higher than their knowledge of tumors was significantly correlated with the graduation year so older graduates were more aware about cysts and tumors. 1110 Oral Medicine Prevalence of oral mucosal lesions in admitted patients in internal department of Yazd Shahid sadoughi hospital in 2018 owlia fatemeh tabatabaei seyyed hossein 1 9 2020 17 3 236 243 30 01 2020 22 09 2020   BACKGROUNackground and AIMD & AIM: : many of systemic diseases are associated with different oral mucosal lesions. One of the most important center for discovery of oral lesions is Internal medicine ward. According to important role of early diagnosis of oral lesions in patients with systemic diseases, this study was designed to evaluate the frequency of oral mucosal lesions among hospitalized patients to internal ward of Yazd Shahid Sadoughi of Medical Science. Material & methods: In this cross sectional study, two hundres five recently hospitalized patients to internal ward, randomly were investigated for oral mucosal lesions. Age, sex, type & location of lesions, oral hygiene status, smoking and dental prostheses were documented. Data were analyzed by SPSS 19 using Chi square and Fisher exact tests. Results: 80 men and 125 women with the mean age of 52.8 years were examined. Age range of patients was between14 to 97.in this study, Red & white lesions were found to be the most common mucosal lesions (38%), followed by vesicullobullous (12.8%), pigmented (9.8%) & exophitic lesions (6.8%), respectively. Conclusion:According the high frequency of oral mucosal lesions in hospitalized patients and the importance of early detection, oral medicine specialists beside the physicians can be an important role in early diagnosis and treatment therefore oral examination of hospitalized patients should be considered. 1107 Oral Medicine Evaluation of Tobacco Products abuse status based on oral evidence in males High School Students of Shahrbabak in 2018-2019 roustaeizade shooroki zahra riyahiyan fariba akhavankarbassi mohammad hasan dental school dental school dental school 1 9 2020 17 3 244 252 20 01 2020 22 09 2020   BACKGROUNackground and AimD & AIM:Tobacco products are the cheapest addictive substance available to the community, causing the deaths of six million people a year. In addict persons the amount of oral hygiene and regular referral to dentistry decreases sharply. Considering the fact that young people in many cases they hide cigarette smoking, in this study, we decided to evaluate the state of tobacco abuse status based on oral evidence in males high School Students. Material & Methods: This descriptive-analytic study was done by cross-sectional method. Four hundred  shahrbaak male High School Students in 2019 enrolled to the study. The data gathering tool was a pre-prepared questionnaire consisting of two parts: the first part included demographic information and the second part surveied frequency of taking drug use over the past 12 months. Data were analyzed by SPSS 20, T-test ، Chi-Square and Fisher Exact tests. P-vaue less than 0.05 was considered statistically significant. Results: The frequency of tobacco products abuse based on self- declaration of students was 32.2% and oral evidence was 23.2%. Oral evidence showed 9.5% of the subjects had lips pigmentation, 7.8% had dental color changes and 6% had both. Increasing the number of children, reducing the level of education of parents, having a history of smoking in the family and reducing the academic grade point average, increase the rate of tobacco products abuse in students based on oral evidence and self-declaration. Conclusion: Factors such as number of children, parents' education, family history of smoking and academic grade point average, affect the frequency of tobacco products abuse.   1140 Dental EDu Investigating the Relationship between Learning Styles Based on kolb's Theory and Academic Status in Resident's of Islamic Azad university of Dentistry,Tehran Branch sayadi zahra azizi Arash lawaf shirien 1 9 2020 17 3 253 262 24 06 2020 23 09 2020   Background and Aim:  Learning styles are one of the manifestations of individual differences and answer the question of why not all people learn in the usual way and their learning outcomes and academic status are different. The present study examined the relationship between learning styles based on club theory and academic status in resdent of dentistry,faculty  of dentistry, Tehran Medical Sciences, Islamic Azad University. Methods and Materials:This research was maded based on cross-sectional method. With the consent of 84 students of dental who were selected by the census method. The kolb's standard  Questionnaire and GPA for the entire general course of study were used to collect information. By completing the questionnaire and reviewing the scores obtained by individuals, each person's learning style was determined. Data analysis was performed by SPSS software and test (chi square and ANOVA). The study was performed on 84 dental assistants . 64.3%  women and 35.7%  men. The mean and standard deviation of students' GPA was16/83 ± 0/239. 81.1% of people had a convergent learning style, 10.7% had an Accommodator style and 7.1% had an Assimilator style. None of the people had a divergent learning style. Examination by statistical tests did not show a significant difference between academic status and different learning styles..  Also, due to the predominance of students with convergent learning style, providing learning environments appropriate to this style, is important for  forcing students to think and scrutinize issues in teaching and learning them for better learning. And acquire or strengthen the necessary capabilities in future educational and work environments. 1112 restorative dentistry Principles and methods of dental nerve tissue regeneration : a review Ghorbani masouleh mohadeseh Habibi roudsari cheshmeh najafi zivlaii Elanaz Jabbari Farzaneh Salarian Reza 1 9 2020 17 3 263 278 14 02 2020 23 09 2020 Background and Aim  Today, tissue engineering is considered a significant approach in modern medicine, which is why research in biomaterials has focused on the development of advanced scaffolding for regenerative medicine.  Many natural and synthetic polymers with a variety of origins have been used to make these scaffolds or are recommended by researches. These compositions usually have the properties such as biocompatibility, biodegradability, and some special advantages such as antibacterial properties and wound healing. Other advantages of these polymers and their derivatives are porous structure, sol-to-gel changing ability, ease of chemical modification, high resemblance to biological or intracellular macromolecules, making them valuable candidates for making supporting compositions or scaffolding used in tissue engineering Methods and Materials: To conduct this review, the Science Direct, Google Scholar, PubMed, and Silivica databases were searched by using the following keywords: " pulp"," regeneration"," scaffolding", and "tissue Results: According to the evaluated researches, a wide range of natural and synthetic compositions can be used as the scaffold for dental pulp regeneration. These materials, that play the role of scaffolding in the three-part tissue engineering, get the best results when create the good conditions for the proliferation of pulp-tissue progenitor cells and good signaling for the invocation and differentiation of these cells into more specific cells. However, in more studies, these scaffolds were used as carriers of precursor cells and growth factors. Conclusion: Tissue engineering is one of the emerging and successful methods for pulp tissue regeneration. Among the principles of tissue engineering, scaffolds can encourage the regeneration process due to the possibility of independent activity without the presence of precursor cells and independent growth factors. Among the types of scaffolds that were studied, natural based materials have shown the highest level of success.