مجله دانشکده دندان پزشکی اصفهان
سال هجدهم شماره 3 (پیاپی 80، پاییز 1401)

Quality of root canal treatment is considered as an important prognostic factor for endodontic therapy success. The aim of this study is to evaluate radiographic errors during the root canal treatment by 5th and 6th year undergraduate students of Islamic Azad university of Isfahan (Khorasgan) from 2015 to 2018

In this study records of 860 cases of endodontic treatment of patients referred to the General Endodontics Department and the Comprehensive Treatment Department of Isfahan Azad University (Khorasgan) during 2015-2018 including 1903 root canals that had received root canal treatment were examined. Periapical radiography was used to evaluate errors during access cavity preparation, canal preparation, and canal filling by two endodontic specialists and it was recorded in pre-prepared forms. In the access cavity preparation: furcation perforation, low access cavity expansion, high access cavity expansion were evaluated. During the canal preparation phase, errors such as missing of canal, ledge, transport, perforation types and broken instruments were investigated. Length and density of root filing were the criteria evaluated at the canal filling stage. The analysis was performed at both descriptive and inferential levels. Statistical analysis was performed by Chi-Square test and exact Fisher's test.

Frequency of acceptable root canal treatment (without errors) was 37.5%. Lower first molars showed the highest error rate (40.7%). Furcation perforation was reported with 9.4% highest error of access cavity preparation. The highest error rate was reported transport (7.8%) in the preparation phase. Inadequate density (gap) of 36.9% and under filling of 31.1% had the highest error in filling stage.

According to the results of this study, it can be stated that general endodontics department needs careful planning to increase the quality of root canal treatments performed by students.

Nasal fracture is the most common fracture of the maxillofacial region, so surgeons’ and patients’ satisfaction after closed reduction from aesthetic and functional (including the effects of respiration and olfaction) perspective is important. The aim of this study was to evaluate the satisfaction of surgeons and patients with the appearance and function of the nose after closed reduction surgery during 6-12 months after surgery to improve the results of this method.

This descriptive-analytical and cross-sectional study was performed on 90 patients in Alzahra and Kashani hospitals of Isfahan during the years 1397-1398 who underwent a closed reduction of nasal fracture within 6-12 months after surgery. All patients and surgeons answered questions about aesthetic and functional outcomes and the need for septorhinoplasty after closed reduction. Pearson correlation coefficient, t-test and paired-sample t-test were used to analyze the data. P-value less than 0.05 was considered as a significant level.

About 55% of patients were satisfied with the esthetic outcome and 38.8% expressed they would consider further surgery to correct the residual nasal deformity. The mean score of surgeons’ satisfaction for nasal aesthetic and function was 3.74 and 3.50. surgeons expressed that the patients’ requirement for septorhinoplasty is low to moderate

Satisfaction of the patient and the surgeon with the nasal closed reduction was in the high-medium range. Also, according to both patients’ and surgeons’ opinions, requirement for septorhinoplasty surgery has a significant and direct relationship with aesthetic issues and also obstruction of the airway following a nasal bone fracture.

The nutrient canals in the anterior region of the mandible are derived from the incisive branch of the inferior neurovascular bundle in which any surgery damages could lead to more hemorrhage and postoperative paresthesia. Evaluating the incidence and anatomical location of these canals using dental CBCT is the purpose of this study.

In this study, the CBCT scans of 196 patients- consist of 89 women and 107 men, average age of 49.1 from archive of the radiology department of the Isfahan Islamic Azad University were scrutinized. sex, location, number, size (mesial-distal and buccal-lingual diameter), shape (round or ovoid) of nutrient canals were recorded. Results were analyzed Mann-Whitney, independent t-test, and Kruskal-Wallis test. (p value < 0.05).

There are nutrient canals in 83.6% of the cases, in most of the cases (73.4 %), two nutrient canals in the anterior region of the mandible were detected. The independent t test showed that the average mesial-distal (p value = 0.48) and buccal-lingual (p value = 0.40) nutrient foramen diameter in between dentate and edentulous ones had no meaningful relation. The number of nutrient canals in the anterior region of the mandible in dentate was meaningfully higher than the edentulous ones (p value < 0.001).

there are nutrient canals in most of the cases. There was no significant correlation between age and the number of nutrient canals in the anterior region of the mandible. There was no significant correlation between sex and the number of nutrient canals in the anterior region of the mandible. There was significant correlation between dentate and edentulous ones and the number of nutrient canals in the anterior region of the mandible. Preoperative knowledge of these findings via CBCT scans would be useful to prevent the complication of mandibular surgery.

Periodontitis is one of the most common periodontal diseases, characterized by destruction of connective tissue and supporting structure of the tooth. Osteoporosis is a systemic disease of skeletal tissue characterized by a decrease in bone mass and leads to the destruction of bone structure. The aim of this study was to evaluate the correlation between systemic osteoporosis and periodontal status in menopausal women referred to the bone density measurement center in Gorgan.

In this case-control study, 56 menopausal women aged 45-65 years participated. Among the participants, 28 individuals had osteoporosis and 28 women were healthy. Periodontal pocket depth (PPD), clinical attachment level (CAL), plaque index (PI) and gingivitis index (GI) were measured for each patient. Finally, the data were analyzed using 95% confidence level.

A total of 56 menopausal women were included in the study. The mean GI in the osteoporotic group was 0.74 ± 1.43 and in the non-osteoporotic group was 0.77 ± 1.32 (p value = 0.280). The mean periodontal pocket depth in the osteoporotic group (0.63 ± 3.73) was more than the non- osteoporotic group 0.57 ± 3.66 (p value = 0.363). PI mean in the osteoporotic and non-osteoporotic groups were 37.11 ± 15 and 37.39 ± 15, respectively (p value = 0.363).

The mean clinical attachment level in menopausal women with osteoporosis was significantly higher than normal menopausal women. On the other hand, there was no significant difference in other indices of periodontal disease such as PPD, PI, GI.

Metals are widely used in direct and indirect restorative materials, both in prosthetics and orthodontics. The biocompatibility of these metals depends on their chemical nature, the number of ions released, and the period of contact of these metals. This study aims to compare two different electropolish temperatures on the release of cobalt ion from chromium-cobalt alloy.

In this experimental study, 24 wax patterns were cut in the form of a circle with a diameter of 15 mm and a thickness of 1 mm. Then, the samples were sprued and invested. Burn out and casting were used to cast the alloy. The samples were sandblasted and polished with aluminum oxide. They were randomly divided into two 12-number groups and electropolished at 45° and 55° C. Samples were placed in artificial saliva and sent to atomic absorption spectrophotometer for 15 and 30 days to read the cobalt. Data were then analyzed by Independent t-test and Paired t-test (p value = 0.05).

The average release of cobalt from chromium cobalt alloy on the 30th day was higher than the 15th day at both 45° C and 55° C. This difference was significant at 45° C (p value = 0.036) while not significant at 55 ° C (p value = 0.0754). Regarding the comparison of the ion release at 45 ° and 55° C, the difference was not significant on the 15th day (p value = 0.067) and 30th day (p value = 0.0754).

The amount of cobalt ions released from the cobalt-chromium alloy at 45° C is fewer than at 55° C over time.

In some studies, photodynamic therapy with some light sources and light-absorbing materials were used against Candida. In this study, the antifungal effects of 630 nm photosan with different concentrations of methylene blue on Candida albicans that had been grown on dentures was investigated. In data searches no similar study was found.

This experimental laboratory study was performed in Isfahan Azad University in 2019-2020. On total 26 similar dentures were prepared. Suspension of 0.5 McFarland Candidia albicans was inoculated on the dentures. The samples were put into three groups (seven in each) with different concentrations of methylene blue (0.1, 0.01, 0.001 g/l) and photosan with a wavelength of 630 nm was used. Five control samples including untreated control, photosan alone and three controls with methylene blue concentrations only were considered. The number of colonies was counted using manual and ocular methods. Data were analyzed with T-test, ANOVA

The mean number of Candida albicans grown on dentures after photodynamic therapy and different concentrations of methylene blue was significantly different from control groups (p value < 0.05). The mean number of Candida albicans grown on dentures after photodynamic therapy were significantly different between the three concentrations of methylene blue (p value < 0.001). methylene blue with a concentration of 0.1 mg had significantly better efficacy against candida compared with two other concentrations (p value < 0.001).

Photodynamic therapy with photosan and methylene blue with a concentration of 0.1 provided better results compared to others in reducing Candida albicans.

Cooperation is one of the most important predictors of treatment outcome in orthodontics. Lack of cooperation can cause prolonged treatment, decrease of efficiency, unpredictable outcome, and cost increase. In this study, the relationship between some personality traits of patients and their cooperation in orthodontic treatment was investigated.

In this cross-sectional descriptive-analytical study, 90 patients who had been referred to 7 specialized orthodontic centers in Isfahan for treatment in 2018 were selected by convenience cluster sampling method. Five personality traits of patients were extracted by NEO-Five Factor Inventory personality test, and their level of cooperation between 2 months and 6 months was extracted by Orthodontic Patient Cooperation Scale questionnaire. The correlation between personality factors and the amount of cooperation in both intervals was calculated by Pearson correlation coefficient analysis. The significance level was considered at 0.05.

There is a significant correlation between neuroticism and patients' cooperation in 2 months and 6 months with coefficients of 0.25 and 0.24, respectively. (p value = 0.01 and p value = 0.03, respectively) There is also a correlation between conscientiousness and cooperation in 6 months with a coefficient of 0.28 (p value = 0.01).

It seems that neurotic personality factor can be a risk factor in patients' lack of cooperation in orthodontic treatment. Conscientiousness is also a factor that can predict good cooperation in orthodontic treatment. But these correlations are not very strong.

Control on children`s dental anxiety is one of the important & effective factor predicting treatment success. Personality factors & parenting style can be very effective in children`s dental anxiety. The aim of this study was to determine the relationship between parenting styles and child`s dental anxiety and behavior in dental setting.

This is a descriptive study done a sample of 126 children aged 4-6 years old and their parents participated in this study in the year 2020. Sampling method was non-random and simple. MCDASf questionnaire was used to measure children`s dental anxiety and Bumrind questionnaire was used for scores of parenting styles. Data were analyzed by Pearson Correlation, Spearman Correlation, and chi-square tests.

A significant relationship between the score of authoritative parenting style in parents and pediatric dental anxiety (p value = 0.803, r = 0.022). However, a significant inverse relationship was observed between the score of authoritarian parenting style in parents and children's dental anxiety (p value < 0.001, r = -0.307). Also, a direct and significant relationship was observed between the score of permissive parenting style in parents and children's dental anxiety (p value < 0.001, r = 0.318)

Dental anxiety and behavior in children is associated with parenting style.

Given the surge in the restoration of infrastructures with zirconia and sintron and the use of different porcelain on them and the lack studies on marginal adaptation in different situations, this study aimed to evaluate the marginal gap before and after porcelain firing.

This cross sectional experimental laboratory research was performed in 2019 in the Transgenesis research center, Isfahan (Khorasgan) Branch, Islamic Azad University, where 40 abutments were divided into two groups of 20 with two types of substructures (zirconia and soft presintered chrome-cobalt alloy (Syntron) AmannGirrbach, Koblach, Austria)) then ,each group was subdivided into two porcelain subgroup of ten (noritake and creation).Marginal gap was evaluated by stereomicroscope before and after porcelain firing .Data was gathered and analyzed by means of one way and two-way ANOVA (α = 0.05).

The difference observed between marginal gap in studied groups was statistically significant (p value < 0.05). But marginal gap in respect to the type of porcelain did not show a significant difference between the groups (p value = 0.214). The lowest amount of change after firing with porcelain was related to the Syntron substructure group with Noritake porcelain, which was significantly different from the two zirconia frame groups (p value = 0.045), (p value = 0.006).

In this research after porcelain firing, sintron showed better results compared to zirconia regardless of porcelain type.

Oral health problems in patients with chronic renal failure can endanger their systemic health. The aim of this study was to assess the correlation of Decayed, Missing, Filled, Teeth (DMFT) and Glomerular Filtration Rate (GFR).

In this descriptive-analytical study, using the Shahidieh project conducted on 9000 people from the city of Yazd in 2017 for data collection. The serum creatinine level, and age, gender and weight of patients were extracted from the questionnaire designed for the Yazd Shahedieh Project after receiving permission. The GFR of each individual was calculated using the Cockcroft Gault formula. For assessment of oral health status, the DMF index of permanent teeth of adults was calculated. The Data analyzed using t-test, ANOVA, Pearson’s correlation coefficient, and regression analysis.

Weight was not related to the number of carious teeth but was directly related to the number of filled teeth. Weight was also inversely related to the number of missing teeth and DMFT. Serum creatinine was not related to the number of decayed teeth but was directly related to the number of missing teeth and DMFT. Serum creatinine was inversely related to the number of filled teeth. Age was inversely related to the number of decayed and filled teeth, but was directly related to the number of missing teeth and DMFT. GFR is directly related to the number of decayed and filled teeth, but is inversely related to the number of missing teeth and DMFT. GFR and DMFT index had a significant and inverse relationship

According to the present study the lower GFR index and the higher the serum creatinine and the higher the stage of kidney disease, a direct correlation of a high DMFT index was observed

Oral lichen planus is a relatively common chronic autoimmune and inflammatory disease in which altered cellular mediated immune response plays a major role in its pathogenesis. Among the possible factors influencing development of oral lichen planus, the role of mental disorders, especially depression and anxiety, has been discussed in pathogenesis of this disease. Therefore, the aim of this study was to investigate the prevalence of depression in patients with oral lichen planus referred to the dental clinic of Isfahan University in year 2018-2019.

In the present case-control study, 40 patients with oral lichen planus referred to the dental clinic of Isfahan University in 2018-2019 (case group) and 40 subjects without oral lichen planus (control group) were investigated. Next, the Beck Depression Inventory (BDI) was completed by all subjects. Finally, the obtained data were analyzed using statistical software.

The obtained results indicated that the average age in case group (43.53 years) was lower than the control group (44.68 years). In addition, the mean for depression in case group (12.78) was higher than control group (9.5), however, this difference was not statistically significant (p value > 0.05).

In general, this study indicated the role of depression in the pathogenesis of oral lichen planus. It was noted that high levels of depression can be an initiation point for various autoimmune reactions and oral lichen planus.

The relationship between dental caries in children and abnormalities in their body mass index is still controversial. The aim of this study was to evaluate the association between Body Mass Index (BMI) and Severe Early Childhood Caries (SECC).

In this case-control study, 150 children with SECC (case group) and 150 caries- free kids for the control group were recruited from a number of Isfahan city’s private clinics in the year 2019.Parameters including weight and height were measured, and BMI (kg/m2) was calculated. The subjects were categorized based on BMI adjusted for age and gender as: underweight (<5th percentile), healthy weight (5th to <85th percentile), overweight (85th to <95th percentile), and obesity (≥95th percentile). The data was analyzed by using Chi-squared, Fisher’s exact test, and Mann-Whitney by considering a significance level at 0.05.

There was a significant difference in the frequency of weight groups between the two groups of children without caries and with severe caries (p value = 0.007). There was a significant difference in the frequency of weight groups between boys and girls in the two groups of children (p value < 0.001). Frequency of weight groups in the age groups of 2, 3, 4 and 5 years there was a significant difference between the two groups of children (p value < 0.001). The mean body mass index in children with severe dental caries was significantly lower than children without caries (p value < 0.001).

According to the findings, a majority of children with SECC were underweight compared to caries free children, suggesting SECC may adversely affect growth.