Caspian Journal of Dental Research
Year:2018 | Volume:7 | Issue:2 |Papers Count:8

Introduction: Evaluation is a tool that can be used to achieve the goals of higher education. The aim of this study was to evaluate the achievement level of educational objectives in Babol dental school using the CIPP (content, input, process, and product) model based on the point of view of students.Materials& Methods: This cross-sectional study was performed using a researcher-made questionnaire based on CIPP model for educational groups of oral and maxillofacial surgery (OMFS), endodontics and periodontics among dental students admitted to Babol University of Medical Sciences in 2008 and 2009. Total scores were calculated for each field and categorized as undesirable, relatively desirable and desirable with scores less than 50, 51-70 and 71-100, respectively. Statistical analysis was performed using ANOVA, T-test and Tukey HSD tests and P< 0.05 was considered significant.Results: The mean scores of four areas were not significantly different between groups for two entries using ANOVA test. By comparing two groups, the mean scores of input area were significantly different in periodontics (p=0.007) and OMFS (p=0.002) departments.Conclusion: Achieving to educational goals within the context area was desirable in all departments. But there are some problems in other studied areas which must be pay attention.

Introduction: Studies have suggested that sodium fluoride (NaF) has an inhibitory effect on the activity of endogenous matrix metalloproteinase enzymes. This study assessed the effect of a fluoride-containing adhesive on microtensile bond strength (mTBS) over time.Material & Methods: In this experimental study, 36 extracted third molars were used to evaluate the mTBS of a 5th generation adhesive modified by NaF. The exposed dentin surfaces were abraded and built up using composite resin. Then, the specimens were randomly divided into three groups of 12 teeth based on the type of adhesive used: Solobond M with no inhibitor (control); Solobond M with 5, 000 ppm NaF; and Solobond M with 10, 000 ppm NaF. The mTBS and failure mode of specimens were evaluated after 24-hour and 3-month storage in distilled water. Data were analyzed using ANOVA and Tukey’s test. P<0.05 was considered as significant level.Results: The control group demonstrated a lower mTBS than the experimental groups after 24 hours and 3 months (p<0.05). The mTBS was higher in adhesive with 5, 000 ppm NaF than in control group after 3 months (p<0.05). The group with 10, 000 ppm NaF had the highest mTBS after 24 hours and 3 months (p<0.05).Conclusion: The fluoride-containing adhesives showed significantly higher bond strength values than the original adhesive without fluoride after 24-hour and 3-month storage in distilled water, leading to the improvement of resin-dentin bonds.

Introduction: Diagnosis of lesions and bone defects is very important and there is a lack of substantial studies on the most appropriate method for bone defect measurement. Hence, the aim of this study is to evaluate the accuracy of multi-slice computed tomography (MSCT) and conebeam computed tomography (CBCT) in the diagnosis of mandibular bone defects present in sheep.Material & Methods: This in vitro study was performed on 15 sheep's mandibular bones. Some defects were created in cortical and spongy bone using high-speed hand piece at the buccal and lingual cortical bone of the lower jaw. Totally, 75 mandibular bone defects with a depth of 1-3 mm were created. The mandibular bone samples were scanned using MSCT and CBCT scanners, and these scans were evaluated by two oral and maxillofacial radiologists. The positive and negative predictive values, sensitivity and specificity were calculated for both methods.Results: The sensitivity of MSCT and CBCT were 78% and 96.5%, and Specificity of MSCT and CBCT were 90% and 92% respectively. The positive and negative predictive values were 97.5% and 89.5 % for CBCT, and 90% and 92% for MSC respectively. The negative and positive likelihood ratios (LR-) and (LR+) were 0.035 and 13.04 for CBCT as well as 0.245 and 7.82 for MSC respectively.Conclusion: The study results demonstrated a higher accuracy of CBCT, compared to MSCT, in the diagnosis of bone defects.

Introduction: Periodontal disease as a chronic inflammatory condition is more prevalent in adults. Considering the anti-inflammatory effect of statins and the need to find out the effects of these drugs on the prevention and treatment of periodontal diseases, this study was conducted to investigate the role of atorvastatin in periodontal health.Material & Methods: In this cross sectional study the effect of atorvastatin on plaque index, probing pocket depth (PPD), gingival index (GI) and bleeding on probing (BOP) index were examined. Patients with plaque index between 1 and 2 were included in the study, and those who had taken atorvastatin for at least 3 months were selected as the case group and those who had not taken atorvastatin were considered as the control group.Results: A total of 138 patients (50 patients for the atorvastatin group and 88 patients for the control group) were included. The mean probing pocket depth in the atorvastatin group was 2.03±0.35 mm and that in the control group was 2.8±0.31 mm (p=0.335). The mean bleeding index in the atorvastatin group was 0.20±0.14 and compared to the control group was 0.20±0.17 (p<0.001). The GI index in the atorvastatin group was 1.29±0.33, compared to the control group was 1.20±0.40 (p=0.218).Conclusion: The results of this study indicate the positive effect of the use of atorvastatin on reducing the bleeding on probing index in patients taking this drug. The probing pocket depth index and gingival index were not significantly different between the atorvastatin group and the group not taking this drug.

Introduction: Considering the good geometry and possibility of simultaneous observation of the roots of the maxillary and mandibular molars in vertical bitewing radiography, the present study was conducted to evaluate the accuracy of vertical bitewing radiography in determination of root length of maxillary primary molars.Material & Methods: One hundred first primary molars and forty second primary molars which were planned to be extracted for reasons other than this study, were used in this cross-sectional study. All radiographs were taken by a radiologist with vertical bitewing technique using XCP pediatric bitewing film holder. The root length was measured from the highest visible point of the occlusal surface to the most apical point of the root using caliper with accuracy of 0.1 mm. After removing the teeth, the length of each root was measured from the highest point at the occlusal surface to the tip of the root. Data were entered into SPSS 20 and analyzed using Pearson correlation and one sample t-test. Significance level was considered as 0.05.Results: According to the results of one sample t-test, although the root length was estimated slightly higher than the actual size in all cases, the difference was significant only for distobuccal root of the first primary molar (P˂0.05). The results of Pearson correlation test showed that in 95% of cases, the true root length values were consistent with those measured by radiography.Conclusion: Based on the results of this study, except for distobuccal root of first primary molar, the vertical bitewing could precisely determine the root length of primary molars.

Introduction: The aim of this study was to evaluate thiobarbituric acid reactive substances (TBARS) as lipid peroxidation marker and total antioxidant capacity (TAC) in saliva of smoker and non-smoker men.Materials & Methods: This case-control study was performed on 104 men including smoker (52) and non-smoker (52) men, referred to the Oral Medicine Department in Babol Faculty of Dentistry.2 ml of unstimulated saliva was collected and specimens were transferred to the Biochemistry Laboratory using dry ice and freezed. Data were analyzed using SPSS 18 and Mann Whitney test.Results: Findings indicated that the levels of TBARS and TAC in saliva of smokers were significantly higher than control group.Conclusion: Higher level of TBARS in smokers can show the evident and dangerous role of cigarette and its chemical compounds, and increased level of TAC in smokers can prove the hypothesis of compensatory mechanism of antioxidant system.

Introduction: Cinnamon zeylanicum is used for various medical purposes. The aim of this study was to compare the antifungal efficacy of cinnamon and amphotericin B against Candida species in vitro.Material & Methods: Candida albicans (C. albicans) and Candida krusei (C. Krusei) were obtained from the Iranian Industrial and Scientific Research Center. The minimum inhibitory concentration (MIC) of cinnamon extract was determined and compared with that of amphotericin B.Results: The results of this study showed that Amphotericin B, ethanolic and aqueous extract of cinnamon inhibited the growth of C. albicans and C. Krusei with different MICs.Conclusion: Ethanolic extract of cinnamon has inhibitory effects on Candida species comparable to that of amphotericin B. So, it can be used as a herbal alternative.

It is a worthy aim to preserve the pulp vitality in teeth with immature root in order to continue the root's maturation. Traumatic injuries and caries are two main reasons for pulp exposure in immature teeth. This article describes two vital pulp therapies on two patients, a nine-year-old boy with traumatized central tooth and a 10-year-old boy with caries exposure in a premolar tooth. Both teeth had open apices in radiography. After removing inflamed pulp, the pulp cap was done using calcium silicate cements (CEM cement, MTA angelus) and then, the teeth were restored with filling material. In periodical follow-ups, both treated teeth remained functional, with complete root development and apex formation. Regarding to the potentiality of pulp healing in immature teeth, vital pulp therapy (VPT) can be an acceptable treatment. However, further clinical studies with longer follow-up periods are recommended.