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Sh. Faghihi , Sh. Kiani Lari , M. Mashadi Farahani ,
Volume 9, Issue 1 (8 1996)

Normal 0 false false false EN-US X-NONE AR-SA In this study, 30 boy students of 16-17 years were randomly selected and were allocated into three groups: The control group, Bass group in which the members were instructed to brush their teeth with Bass method and Rolling method group in which they were asked to brush  with Rolling Method. Two latter groups brushed their teeth two times a day (morning/night) .for all the participants, ultrasonic scaling was done 4 weeks prior to the study. After 4 weeks, PLI and GI were measured and recorded by Sillness and Loe method. All the participants used a soft multitufted tooth brush. All 3 groups showed lower indices in comparison to basle line measurements but Two latter groups showed  higher difference in comparison to the control group.The difference between Second and third groups was not found statistically significant. Gingival index during 4 weeks of study has not changed siginificantly.The obtained results confirmed the importance of duration and quality of every brushing technique.


M. Vahedi, P. Bakianian Vaziri , Hr. Abdolsamadi, A. Pahlavan, M. Hajilooii, Sh. Abdollahzadeh,
Volume 21, Issue 2 (12 2008)

Background and Aim: Contaminated dental handpieces have the potential to transfer infection to patients. New generation of autoclavable turbines have to some extent overcome the problem however, in clinic sometimes it is necessary to use chemical to disinfect handpieces. The aim of this study was to determine the antimicrobial effect of some routinely used disinfectant solutions on dental contaminated handpieces.

Materials and Methods: In this experimental study 35 turbines were sterilized. The turbines' heads were inserted into microbial suspension containing staphylococcus, pseudomonas and candida and then exposed to the disinfectant solutions. Inoculations into culture medium were made at different intervals. All medium was incubated for 24 hours at 37oC followed by spectrophotometer inspection for detection of microbial growth. Serial dilutions of disinfectant agents were used to determine the highest dilution in which there was no microbial growth. Kruskal wallis test was used for statistical analysis and p<0.05 was considered as the level significance.

Results: Ethanol had antimicrobial effect on all of the tested microorganisms at dilution of 1:4. Betadine at dilution of 1:64 caused inhibition of all of the microbes except pseudomonas. Micro 10 had antimicrobial effect up to dilution of 1:256 but could not inhibit microbial growth at higher dilution. Sodium hypochlorite inhibited growth of the three microoganisms up to dilution of 1:1024.

Conclusion: Based of on the results of this study sodium hypochlorite was found to be the most effective antimicrobial agent among those used in this study, inhibiting microbial growth at the highest dilution.

Farin Kiani Yazdy, Masoud Golshah, Mahboobeh Razmkhah, Abbas Ghadery,
Volume 26, Issue 2 (5-2013)

Background and Aims: Apoptosis or programmed cell death plays an important role in the pathogenesis of many diseases. Previous studies suggest that apoptosis is involved in the pathogenesis of periodontal disease, on the other hand it is also suggested that diabetes mellitus enhances apoptosis of connective tissue cells. Thus, we measured expression of proteins which are relevant to apoptosis in the gingival tissue of diabetic patients with chronic periodontitis in comparison to non diabetic individuals.

Materials and Methods: 25 patients with diabetes and chronic periodontitis and 16 non diabetic controls were included in this study. 4 weeks after scaling and root planning and oral hygiene instructions, periodontal surgery was done and gingival tissues obtained during surgery, were sent to lab to investigate expression of Fas, P53, Bcl-2 and Survivin using real-time PCR technique. Data were analyzed using Mann-Whitney and Chi-squared.

Results: Pro-apoptotic proteins (Fas, P53) were significantly (P<0.05) higher in gingival tissues of diabetics (9.5×10-6, 2.4×10-6, respectively) in comparison to non diabetics (9.4×10-7, 5.6×10-7), whereas the difference in expression of anti-apoptotic proteins (Bcl-2, Survivin) between 2 groups was not significant (9.7×10-8, 3.5×10-7 in comparison to 1.4×10-7, 3.1×10-7, respectively)( P =0.91, P =0.29 respectively).

Conclusion: Apoptosis was increased in gingival connective tissue of diabetic patients with chronic periodontitis in comparison to non diabetic ones. Therefore , intervention in expression or function of pro-apoptotic proteins (Fas, P53) could be a new goal in the treatment of periodontal disease of diabetic patients.

Ahmad Jafari, Masoud Kiani, Mahin Nikkhah, Ronak Bakhtiari, Yahya Baradaran Nakhjavani, Ali Reza Heidari,
Volume 27, Issue 3 (9-2014)

  Background and Aims: Considering the complications of root canal system, debridement would not be effective only by mechanical instrumentation. Therefore, root canal irrigants with the antimicrobial effect that can eliminate more microorganisms during treatment, becomes important. The aim of this study was to compare the antimicrobial effects of 2% thyme essence, 2.5% sodium hypochlorite (NaClO), and normal saline as root canal irrigants for primary molar teeth.

  Materials and Methods: This study was performed on 34 primary molars. Subjects were randomly divided into three groups (N=10). The root canals of the teeth were prepared up to the file #35 and all of the specimens were sterilized, and were then contaminated with entrococccus faecalis suspension (Enterococcus Faecalis ATTC 29212). After 48 hours of incubation, the specimens of each group were irrigated with corresponding irrigants. Then, the microbial specimens were collected with sterile paper points. After incubation, the numbers of Colony Forming Units (CFU) were counted using colony counter. Data were analyzed using Smirnov-Kolmogorov, Kruskal-Wallis and Mann-Whitney tests.

  Results: Sodium hypochlorite showed the highest antimicrobial effect and showed significant differences compared with normal saline (P<0.001). However, the differences were not significant with thyme essence 2% (P=0.3).

  Conclusion: Thyme essence could be considered as a natural irrigator with a comparable antiseptic effect to sodium hypochlorite.

Asie Eftekari, Maryam Bakhtiari, Amir Sam Kianimoghadam,
Volume 34, Issue 0 (5-2021)

Background and Aims: Studies have shown that dental anxiety may be caused by various factors such as child mood, age, maternal emotional maturity, previous dental anxiety and parenting styles. Therefore, the aim of this study was to investigate the possible relationship between the parenting styles and pediatric dental anxiety and the predictability of this variable through parenting styles.
Materials and Methods: The present study was a cross-sectional correlational study. The study population was children aged 7 to 12 years who had referred to the dental clinics of Tehran in 1400. Sampling from one of the clinics was done randomly. A total of 100 questionnaires of modified child dental anxiety scale and parenting style inventory were given to the children and their parents and 95 of them could have been analyzed. The questionnaires were analyzed using SPSS22 software and Pearson correlation and regression tests.
Results: The results showed that dental anxiety had a negative and significant relationship with authoritative parenting style (r=-0.286, P<0.01) and a positive and significant relationship with authoritarian parenting style (r=0.342, P<0.01). Authoritarian parenting style can be a predictor of dental anxiety.
Conclusion: Knowing the predictors of dental anxiety can help a pediatric dentist analysing who is most prone to dental anxiety. Based on this approach, a relationship based on trust can be established between the dentist and parents to make the necessary recommendations to parents in the office, reduce dental anxiety and improve oral health conditions in children.

Sara Ghadimi, Bahman Seraj, , Mohammad Javad Kharazi Fard, Masoud Kiani, Marzieh Salehi Shahrabi,
Volume 35, Issue 0 (5-2022)

Background and Aims: Selecting the appropriate education evaluation method and the effects of this choice according to different fields of medical sciences, is one of the current priorities of medical education. Therefore, the aim of this study was to design a checklist for evaluating the practical skills of dental students and to get compared with the global ranking method.
Materials and Methods: A checklist was developed for the assessment of clinical skills of the practical pediatric course according to an action research method. 32 students were evaluated by the checklist method and 32 students were evaluated by the conventional global rating method (sampling was based on available sample).  Faculty staff and students’ satisfaction regarding the two methods were reported by a 6-scaled measure and statistically analyzed by Wilcoxon Signed Ranks test. The students' scores by the two methods were subjected to paired t test for comparison.
Results: The students were more satisfied with the checklist method (P=0.003). The faculty staff considered a greater ability of the checklist method to differentiate between the students (P=0.03). However, in terms of ease of use and suitability, most faculty staff preferred the traditional method (P=0.02). In other cases, there were no significant differences in the views of students and faculty staff towards the two methods.
Conclusion: In the present study, both Checklist and global rating methods were valuable for evaluation, although due to the greater satisfaction of students and faculty staff with the developed checklist method, the possibility of identifying the weak points leading to decreased scores and better assessment of capabilities, this checklist can be used for evaluation instead.

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