فهرست مطالب somayeh ghorbani gholiabad

Physiological changes during pregnancy affect the teeth and tissues of the mouth and gums, which increases the severity of problems such as caries, inflammation, bleeding and swelling of the gum. Therefore, pregnant people need regular check-ups and provide adequate education. The aim of this study was evaluation of oral and dental health status in pregnant women referring to Fatemieh Hospital in Hamadan City during 2018.

This study was performed on 96 pregnant women. The adjusted questionnaire was completed for each individual by interview method in order to complete the section on personal and pregnancy data and examination in order to complete the section on oral and dental health status. Statistical analysis was performed using SPSS version 16 software.

The mean age of the participants was 29.64. The Decay Missing Filling Teeth (DMFT) index in pregnant women was 10.48 ± 3.81. 75.74% of the participants were positive in terms of BOP. 12.50% had dry mouth. Using gingival index, 68.75% of the subjects had gingivitis and the mean gingival index was 0.98 ± 0.79%. In terms of oral hygiene, using the index plaque assessment, the majority of the participants was moderate (45.83%) and the mean plaque index was 1.27 ± 0.62%.

Pregnant mothers have a moderate oral health. For this reason, it is necessary to inform physicians in order to refer them to dentists and educate pregnant women to observe oral hygiene and prevent the occurrence of oral diseases and gingivitis in pregnancy.

Acute myeloid leukemia (AML) is a common malignancy in adults. A vast variety of environmental and lifestyle factors play a role in AML incidence. This study aimed to assess the factors related to AML. Study design: A case-control study.

This case-control study was performed on 137 AML cases during 2018-2021 at Beheshti Hospital in Hamadan, Iran, and 137 gender/age-matched controls. A questionnaire including 12 items was used to obtain information about lifestyle and environmental factors. A univariate and multiple variate logistic regression was used to estimate the odds ratios (OR), and a 95% confidence interval (CI) was used to investigate the relationship between the studied variables and the incidence of AML.

Based on findings, 62 (45.3%) out of the 137 leukemic cases were male and 75 (4.7%) were females. A statistically significant increased risk for AML was found with regard to prior usage of cytotoxic agents (OR: 8.00, 95% CI: 1.01, 63.9, P=0.050), family history of malignancies (OR: 3.62, 95% CI: 1.65, 7.92, P=0.001), exposure to electrical power (OR: 3.22, 95% CI: 1.52, 6.81, P=0.002), and history of mental diseases (OR: 8.50, 95% CI: 3.64, 19.80, P=0.001). It was found that the AML incidence had no association with age, gender, radiation therapy, cigarette smoking, prior chemotherapy, congenital disorders, exposure to chemical agents, history of infectious mononucleosis, exercise, and blood transfusion (P>0.05).

The current results suggested that cytotoxic agents, family history of m

This study aimed to compare the marginal fit of temporary restorations fabricated by the conventional chairside method, 3D printing, and milling.

In this in vitro, experimental study, 14 temporary restorations were conventionally fabricated over an implant abutment and analog that had been mounted in a phantom model at the site of canine tooth, using auto-polymerizing acrylic resin and putty index. In digital manufacturing, the original model was scanned, and the final restoration was designed. Fourteen temporary restorations were milled out of polymethyl methacrylate (PMMA) blocks, and 14 others were printed by a 3D printer. Temporary crowns were placed on the abutment, and images were obtained from specific areas under a stereomicroscope at x100 magnification to measure the amount of marginal gap. Data were analyzed using one-way ANOVA and Tukey’s test (α=0.05).

The mean marginal gap values for the temporary crowns in the 3D printing, milling, and chairside groups were 91.40, 75.28 and 51.23 µm, respectively. The crowns that were conventionally fabricated chairside exhibited the lowest marginal gap, and the difference in this respect was significant among the three groups (P<0.05).

Temporary crowns fabricated by the chairside method showed significantly smaller marginal gap; however, the marginal gap of all three groups was within the clinically acceptable range.

Statement of the Problem: 

The mechanism of operation of dental scanners are based on different technologies. Considering these differences, there are many types of scanners available in the market.

This in-vitro study aimed to compare the accuracy (precision and trueness) of seven commonly used dental scanners.

In this in-vitro, experimental study, accuracy of 7 common extra oral scanners (Sirona ineos inLab, Sirona X5, Dentium, Imes Icore 350I, amann girrbach, 3shape D700, 3shape E3) were evaluated. Each of scanners performed 7 scans of implant abutment of SIC (SIC MAX.GH1). Data from each scanner were then compared to data received from 3Shape Trios intra oral scanner, as a reference. For evaluating the accuracy of each scanner, trueness and precision was evaluated. Collected data were analyzed using Kruskal Wallis and Bonferroni tests via SPSS version 22.

Descriptive statistics showed the best trueness was for 3Shape E3 scanner with the average of 35.37 µm and the worst referred to Sirona x5 scanner with the average of 51.75 µm. Furthermore, the best precision refers to 3Shape E3 scanner with the average of 35.34, while the lowest precision was noted in 3Shape D700. The scanners had significant differences with each other in terms of trueness and precision (p < 0.05).

In this study the extra oral scanner, 3shape E3, had the best trueness and precision. The lowest amount of trueness among the studied scanners was for the extra oral scanner, Sirona x5, and the lowest precision was for scanner 3shape D700.

This survey was conducted to determine the level of aggression among the Iranian adult population and underlying predisposing factors. Study design: A cross-sectional study.

This cross-sectional study included 10,957 participants, involving 23 out of the 31 provinces of Iran in 2019. The outcome of interest was aggression, evaluated by the Buss & Perry aggression questionnaire. The association between aggression and 34 demographic, behavioral, social, and cultural characteristics was assessed using simple and multiple linear regression.

The overall mean (SD) score of aggression was 77.10 (22.53). Based on the severity of aggression, the participants were categorized into four groups as follows: 2,464 (23.1%) nonaggressive, 4,692 (43.9%) mild, 3,071 (28.8%) moderate, and 454 (4.2%) severe aggressive. Aggression was more likely to occur in people with the following characteristics: younger ages, having several siblings, lower ranks of birth, having an intimate friend of the opposite sex, having an aggressive father/mother, history of parental divorce, interest in watching action/porn movies, listening to music, history of escape from home/school, using neuropsychiatric drugs, using illicit drugs, history of suicidal thoughts/attempt, and family conflict and hostility. Aggression was less likely to occur with the following characteristics: reading, regular physical exercise, the ability to control anger, regular prayer, adherence to avoid lying, respect to other people's rights, sexual satisfaction, and attachment to parents.

A majority of the population has some degree of aggression. Aggression is a multifactorial behavior corresponding with several demographical, social, cultural, and religious factors, some of which back to early childhood events.

This study aimed to assess the effect of three commonly consumed beverages on surface roughness of polished and glazed zirconia-reinforced lithium silicate (ZLS) glass ceramics.

In this experimental study, 104 rectangular specimens were cut from Vita Suprinity blocks with 2 mm thickness. After ultrasonic cleaning and firing of the specimens, they were finished and polished in two groups. Specimens in the first group were polished using a 2-step polishing kit while the second group specimens were glazed and heated in a porcelain firing oven according to the manufacturer’s instructions. Baseline surface roughness was measured using a profilometer. Specimens in each group were then randomly divided into 4 subgroups (n=13) for immersion in artificial saliva (control group), cola, orange juice and black tea. Surface roughness was measured again and data were analyzed using two-way ANOVA.

The highest and the lowest mean Ra were found in orange juice and saliva subgroups, respectively in both glazed and polished groups. The Ra values of both polished and glazed groups significantly increased after immersion in orange juice and cola (P<0.05). The polished surfaces showed insignificantly higher surface roughness compared with glazed surfaces (P>0.05).

Orange juice and cola significantly increased the surface roughness of both polished and glazed ZLS ceramics. Type of surface finishing (polishing versus glazing) had no significant effect on the surface roughness of specimens following immersion in different beverages.

Aim: This study aims to predict survival rate of gastric cancer patients and identify the effective factors related to it, using artificial neural network model.
Gastric cancer is the most deadly disease in north and northeast provinces of Iran. A total of 430 patients with gastric cancer who referred to Baghban clinic in Sari, from early November 2006 to late October 2013 were followed.
A historical cohort of patients who referred to Baghban Clinic, the cancer research center of Mazandaran University of Medical Sciences in Sari, from early November 2006 to late October 2013 was studied. Three groups of variables (demographic, biological and socio-economic) were studied. Survival rate and effective factors on survival time were calculated using Kaplan-Meier methods and artificial neural networks and the best network structure were chosen using the mean square error and ROC curve. All analyses were performed using SPSS v.18.0 and the level of significance was selected ? 0.05.
In this research, the median survival time was 19±2.04 months. The 1 to 5-year survival rates for patients were 0.64, 0.44, 0.34, 0.24 and 0.19, respectively. The percentage of right predictions of the selected network and the area under the ROC curve were 92% and 94%, respectively. According to the results, the type of treatment, metastasis, stage of disease, histology grade, histology type and the age of diagnosis were effective factors on survival period.
the 5 years survival rate of gastric cancer patients in Mazandaran is lower than other provinces which could be due to the delay in diagnosis or patient’s referral. Therefore, the use of screening methods and early diagnosis could be influential for improving survival rate of these patients.

Background and One of the most common methods used to estimate the effects of explanatory variables on survival time, is Cox semi parametric model. However, under certain circumstances, accelerated failure time parametric models are superior to the Cox model. The purpose of this study was to assess the efficiency of parametric and semi-parametric models in survival analysis of patients with gastric cancer. In this retrospective study, we analyzed 249 medical records of patients attending Tooba clinic affiliated to Mazandaran University of Medical Sciences. We obtained information on the final status of patients viaphone calls.Parametric methods including Weibull, loglogistic and log-normal and semi-parametric Cox model was fitted on the data to identifythe factors reducing survival time The results showed that patients with primary progress of disease, surgery as a treatment and patients without metastasis had higher survival rate than patientsin otherstages of disease and treatment (P<0.05). According to the value of Akaike Information Criterion (AIC) in univariate and multivariate analyses, lognormal model had best fitness in these data. However, parametric regression model had fitted better than Cox semiparametric regression. In this study lognormal model had highest fitness in our data. However, there were no significant differences between values of AIC of these models.According to the results, applying parametric model is suggested instead of semi parametric model if there is enough information about survival time and trend of variation.

Background and

Gastric cancer is one of the most common cancers in the world and Mazandaran province is known as one of the areas with high incidence of gastric cancer in Iran. This study examined the survival rates and factors affecting survival of patients with gastric cancer treated in Touba Clinic of Sari.

In this retrospective study the information of 430 patients with gastric cancer were studied. They were followed up for a 5-year period from November 2007 until December 2012. The overall survival rates were determined using nonparametric method of Kaplan - Meier and univariate analysis, and log rank test was used to determine the factors affecting the survival rates of the patients.

Among the patients 68.8% were male and 31.2% were female. The mean age of male patients was 65.98 years and in female it was 61.12 years. The mean and median survival rates of these patients were 27.82 months and 19 months, respectively. The survival rate of the studied population in one, two, three, four and five years were 0.64, 0.44, 0.34, 0.28 and 0.19, respectively. Univariate analysis identified age at diagnosis (p= 0.001), degree of differentiation of tumor (p= 0.031), metastasis of disease (p= 0.000), tumor stage (p= 0.000), type of treatment for the patient (p= 0.000), histopathology type (p= 0.013), and location (p= 0.009) as effective diagnostic factors.

Five-year survival rate of patients with gastric cancer is low in Sari. Late referred and delayed diagnosis could be the reasons, therefore, early detection and screening methods are of great importance in improving the survival rate in these patients