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B. Seraj , V. Esfahanian , S. Sadeghian ,
Volume 8, Issue 2 (9 1995)

Normal 0 false false false EN-US X-NONE AR-SA 1482 patients of 3-5 years ( 56% m/44% f) were selected from Isfahan kindergartens. In 1.4% of them, numeric  dental anomaly was diagnosed of which 0.74 %  had congenital missing teeth, 0.06 % had hyperdontia and 0.6% had geminated teeth. 0.72 % of Congenital missing was seen in boys while 1.2% in girls. Also, Gemination was seen 0.12 % in boys and 1.2% in girls which is 10 times more than boys in total study population. 0.2% of cases had concomitant tooth missing and gemination. Missing was mostly seen in mandibular incisors. Germination was seen  80% in mandibular anterior region. Besides, in 50% of the patients who had primary teeth missing, permanent teeth missing in both sides were also diagnosed by radiography. One case found with supernumerary tooth in maxillary lateral incisor region. In this article, the possible risk factors were analyzed in case and control groups. Any significant relationship between these factors and numeric dental anomalies was concluded.

F. Aghahoseini , N. Heidary Seraj ,
Volume 9, Issue 2 (9 1996)

Normal 0 false false false EN-US X-NONE AR-SA In recent years, Medical science has been developed remarkably in treatment of malignant diseases. New treatment modalities, chemotherapy, radiotherapy and immunotherapy in patients with different types of neoplasm have cured some cases and increased their life long. On the other hand, considerable complications have also been developed for both patients and clinicians. Viral infections of oral cavity in patients receiving chemotherapy is ignored in most cases. Therefore, we aimed to evaluate viral infections in hospitalized patients receiving chemotherapy in Hematology department of Amiralam and Imam Khomeini Hospitals. On this account 84 patients with leukemia (AML,ALL, CML, CLL) and lymphoma ( hochkin and non hochkin) who were in immunosuppression phase after chemotherapy were evaluated in 3 months. Lower incidence of viral infections in comparison to the results of other countries were obtained.

B. Seraj , N. Hakoupian ,
Volume 13, Issue 2 (7 2000)

A case involving the replantation of an avulsed incisor after long extra-oral period (8 days) is reported. After cleaning the root surface, the tooth was soaked in fluoride gel for 20 minutes and root canal therapy was performed extraorally. The tooth was stabilized by wire and composite for six weeks. The patient has been periodically recalled and the tooth monitored for 36 months after replantation. Only minor external surface resorption was observed in the periapical area on the rodiograph, which was taken immediately before removal of the splint and the rate of subsequent replacement resorption has been acceptable. It should be considered that and extended extraoral period is not an absolute contraindication to replantation. Teeth replanted after long extra- alveolar periods can function for a long period of time and thus postpone prosthetic treatment.

B. Seraj ,
Volume 14, Issue 4 (10 2002)

Whenever the first permanent molar is extracted or its long- term prognosis is poor, before taking any steps, a full clinical and radiographic evaluation associated with patient's dental models investigation is necessary to determine the following cases:The quality and quantity of dentition, teeth missing, occlusion, buds position, orthodontic problems, the level of parents and patient cooperation for future long term orthodontic treatment and finally patient's oral hygiene. On the basis of this information, a decision is taken about the first permanent molar extraction with poor prognosis, either of balancing or compensatory type, especially when future orthodontic treatment is improbable. The aim of this article is to explain the principles of time and sequence of first permanent molar extraction.
A. Kowsari , B. Seraj , N.   Pasdar ,
Volume 15, Issue 1 (25 2002)

Due to the differences in the composite and morphology of dentin in primary and permanent teeth, it is necessary to make improvements in bonding techniques to promote the strength of composite resins bonded to the dentinal surface, in primary teeth. The use of lower radiation, to make structural and chemical changes in dentinal surfaces has been investigated. This research was conducted to evaluate the shear strength of the composite bonded to primary teeth dentin after Nd: YAG laser radiation and acid etching for conditioning. Peripheral dentin of the buccal and lingua! surfaces of 60 extracted posterior primary teeth were exposed and polished with 600 grit with Sic paper. The teeth were divided randomly in 3 groups of 20 teeth. In group 1 etching gel, primer and adhesive of scotch bond multipurpose system (SMP), in group 2 laser at 1.6 w and 80 mj/pulse, and in group 3 laser at 2 s and 700 mj/pulse were used. Moreover, in groups 2 and 3, after laser radiation, acid etching, primer and adhesive of SMP system were applied. After necessary laboratory tests, the mean shear bond strength in MPa were 20.99±5.3 (group 1), 23.82±6.31 (group 2) and 26.58±5.59 (group 3). ANOVA, scheffe, tukey statistical tests showed that the bond strengths of group 3 were statistically higher than group 1. The frequency of dentin cohesive failures were significantly higher in groups 2 and 3, compared to group 1 that indicates a higher bond strength in these groups. Scanning electron mirographs of laser radiated surfaces, show a porous and rough surface morphology that enhances the mechanical bond of the composite.
H. Afshar , B. Seraj , A. Emadosadati ,
Volume 16, Issue 2 (8 2003)

Statement of Problem: Previous experiences and clinical observations indicate that enamel hypoplasia and hypocalcification of first permanent molars, among infants born in Cessarian Section Delivery (C/S) is more common than those born in Normal Vaginal Delivery (NVD). Moreover, the first permanent molar is the only tooth that its "cusp tip calcification" starts exactly at the time of delivery.

Purpose: The aim of this research was to investigate the relationship between delivery type and clinical feature of the first permanent molar. Meanwhile, the different effects of the elective and selective types of cessarian, on the clinical feature of first permanent molar, were studied.
Materials and Methods: Birth files, relation to the year 1994 and before, were extracted from a gynecologist clinic. One hundred patients with NVD, 50 patients with selective cessarian delivery and 50 patients with elective cessarian delivery were chosen to examine clinical feature of the first permanent molars of their children. The children, 6 years old or more, were examined. The medical information of the mother were extracted from her file and that of child, were asked from the mother. To analyze the result, X lest- was used.
Results: The prevalence of enamel defects (hypoplasia and hypocalcification) of the first permanent molar among children born by C/S, were significantly different from the children born by NVD (P=0.0002). Mean while, the prevalence of these enamel defects in the selective cessarian delivery was more than elective cessarian delivery (17% vs. 9%), which was not statistically significant (P-0.07)

Conclusion: It is suggested that gynecologists, pediatricians and pedodontists provide the parents with necessary information about the child's first permanent tooth and ask them to pay enough attention to keep this tooth which is considered as the key of occlusion.

M. Shahrabi , B. Seraj , Mh. Nekoofar , Sh. Moshrefian , Mj. Kharazi Fard ,
Volume 17, Issue 1 (7 2004)

Statement of Problem: Radiography is the most common technique in working length determination, however, because of its limitations is not considered as an ideal technique. Its application, particularly for children due to radiation hazards, technical problems in young and unco-operative children and the superimposition of permanent teeth bud on primary teeth root, lead to numerous problems.
Purpose: The goal of this study was to evaluate the accuracy of an electronic apex locator (EAL) in working length determination of primary teeth.
Materials and Methods: In this in-vitro study 96 canals of the extracted primary teeth, with at least 2/3 of the root length remained, were investigated. There were no obstructed canal, previous root canal therapy and perforation of pulp chamber floor. All working lengths were also measured by radiography. The results of Raypex 4 and radiography were compared with actual root canal lengths determined by direct observation. The applied EAL, in this study was called Raypex 4, a new device belonged to the fourth generation (Ratio Type). The results were analyzed by Chi-Square and Pearson correlation statistical tests.
Results: The accuracy of Raypex and radiography were 61.5% and 63.5%, respectively. The differences between Reypex 4 root canal length measurements and those of direct observation were not significant (P=0.08), but such difference between radiography and direct observation was statistically significant (P=0.01). The diameter of the apical foramen (the site of canal opening) did not affect on Raypex 4 accuray (P>0.05).
Conclusion: Considering the acceptable safetyness, Painlessness, simple and rapid application and an accuracy comparable to that of radiography, the use of Raypex4 EAL for the measurement of primary teeth length is suggested.
B Seraj , A. Ramyar , R. Ahmadi , S Ghadimi ,
Volume 19, Issue 1 (3 2006)

Langerhans cell histiocytosis (LCH) is a rare disease with formation of granulomatous infiltrations consisting of Langerhans cells, histiocytes, lymphocytes and eosinophilic granulocytes. The ethiopathogenesis of the disease has not been fully clarified yet. It can occur as focal or disseminated form - acute or chronic. Oral manifestations may be the first signs. This article reports a case of a 3 year old boy with LCH suffering from severe dental mobility and foul breathe. Radiographically, the lesions appeared as well-defined radiolucent defects in maxilla and mandible. The microscopic findings consisted of sheet like arrangements of histiocytes with a mixture of eosinophils and other inflammatory cells. Biochemical tests were within normal limits.
M. Shahrabi , B. Seraj , A. Heidari ,
Volume 19, Issue 1 (3 2006)

Background and Aim: Radiography is the most commonly used technique in root canal length determination, but its application in pedodontics is difficult due to many problems such as radiation hazards, superimposition of permanent teeth buds and uncooperative children. The aim of this study was to investigate the accuracy of an electronic apex locator (Dentaport ZX) in measuring the root canal length of primary teeth in vivo.

Materials and Methods: In this test evaluation study, pulp tissues of 52 primary teeth planned to extraction were removed and the canal length were measured by Dentaport ZX. After extraction, real lengths of canals were measured by using# 15 K-Type file with 0. 1 mm accuracy and both measurements were compared. Data were analyzed by Smirnov Kolmogorov, chi-square, ANOVA and intraclass correlation and p<0.05 was considered as the limit of significance.

Results: The difference between the canal lengths measured by eye and Dentaport ZX was–0.17±0.384 mm. Maximum deviation of the real length of canals was between-0.2 to+0.2 mm from apical foramen. Accuracy of Dentaport ZX in the range of-0.2 to+0.2 from apical foramen was 66.96% and in the range of-0.5 to+0.5 from apical foramen was 92.17%.

Conclusion: Based on the results of this study, the use of Dentaport ZX in endodontic treatment for primary teeth could be advisable.

B. Seraj , M. Shahrabi , M. Falahzade , F. Falahzade , N. Akhondi ,
Volume 19, Issue 2 (4 2006)

Background and Aim: Human and animal studies linking fluoride with diminished intelligence have been published. Although adverse effects of high intake of fluoride on intelligence and mental acuity continue to be reported, they are still controversial. The aim of this research was to investigate the relationship between fluoride in drinking water and children's intelligence.

Materials and Methods: In this cross sectional study, 41 children were selected from the high fluoride area with 2.5mg/l (ppm) fluoride in the drinking water and 85 children were selected from low fluoride area with 0.4mg/l (ppm) fluoride in the drinking water. The intelligence quotient (IQ) of each child was measured by the Raven's test. The history of illnesses affecting the nervous system, head trauma, birth weight (2.5kg or  2.5kg), residental history, age and sex of children were investigated by questionnaires completed by the children's parents. Data were analyzed by Chi-Square test with p<0.05 as the limit of significance.

Results: In the high fluoride area the mean IQ of children (87.911) was significantly lower than in the low fluoride area (98.912.9) (P=0.025).

Conclusion: Based on the findings of this study, exposure of children to high levels of fluoride may carry the risk of impaired development of intelligence.

M. Shahrabi , F. Mohandes , B. Seraj ,
Volume 19, Issue 4 (6 2007)

Background and Aim: Extensive studies on the epidemiology of teeth and oral diseases are an important part of health care programs specially for hearing impaired groups. For adequate programming in this field, proper situation analysis is mandatory. The aim of this study was to assess the DMFT (decayed missed filled teeth) of 12 years old students attending hearing impaired schools in Tehran and exploring the relation between sex, hygiene and hearing threshold with the index.

Materials and Methods: This cross sectional descriptive study was based on examining 12 years old (± 6 month) students (117 cases) attending hearing impaired schools in Tehran. A questionnaire was filled for each case. T, Chi-square and Kruskall-Wallis tests were used to analyze the results with p<0.05 as the limit of significance.

Results: The mean DMFT in these students was 3.07. Mean DMFT in students with very severe hearing loss was 2.99. Mean ranked DMFT in girls and boys was similar (56.09 in boys and 61.96 in girls). Mean ranked DMFT in students who didn’t use floss (66.40) was higher than those who used floss (46.71). Mean ranked DMFT in students who seldom brushed, was the highest (72.82) and in students who brushed once a day was the lowest (51.26).

Conclusion: The DMFT index in hearing disabled children was 3.07. Regular brushing and flossing reduced the index.

B. Seraj , P. Motahhari , M. Fakhri , R. Ahmadi ,
Volume 20, Issue 2 (9 2007)

Odontomas are benign tumors of odontogenic origin characterized by their slow growth. They are considered to be a common type of odontogenic tumor, but rarely occur in the primary dentition.The etiology of odontomas is unknown, although local trauma, infection and genetic factors have been suggested. Odontomas often cause disturbances in the eruption of teeth such as, impaction or delayed eruption, and retention of primary teeth and abnormalities in the position of teeth such as tipping or displacement of adjacent teeth. In this paper, a case of unerupted right mandibular primary cuspid in a 5 years old girl due to the presence of a compound odontoma is presented.

J. Chalipa, Mh. Hosseini, Mk . Hosseinian Serajelou, A. Khorshidian,
Volume 23, Issue 1 (22 2010)

Background and Aims: One of the common human evolutionary anomalies is dental Missing. Evolution of dental system is toward deduction of teeth number. The Missing of third molar is interesting subject for dentists and genetic researches because of its variety in different races. Consideration of bilateral effect of third molar Missing with jaw relation is an important subject. The aim of this study was to evaluate the third molar missing in Cl I and Cl II skeletal (without rotation) and comparison of them together.

Materials and Methods: The patients of the orthodontic department of school of Dentistry (Tehran University of Medical Sciences) were analyzed. About 121 patients had Cl I and 60 patients had ClI jaw relation. This relation identified based on cephalometric lateral radiographic ANB corner angle. Patient who had rotation in maxilla or mandible based on SN-Go Gn angle were excluded. The incidence of third molars agenesis in individual dentition quadrants, upper and lower jaw and right and left side of dentition was examined from panoramic radiography. AChi-square test was used for statistical analysis of data.

Results: Missing of one or more third molar in skeletal Cl I and Cl II was 43% and 33.3%, respectively. Missing of one or more third molar in Cl II was fewer than Cl I, but no statistically significant differences were seen between them.

Conclusion: There was not a direct relationship between jaw relation and third molar Missing.

Neda Babaee, Arash Poorsattar Bejeh Mir, Hamed Serajpoor,
Volume 26, Issue 4 (1-2014)

  Background and Aims: Occurrence of medical emergencies in dental offices is not uncommon. The most important and the first step in controlling the medical emergencies is the ability to provide basic life support which needs knowledge, experience and equipments. The aim of this study was to investigate the knowledge of dentists relating to the management of medical emergencies in dental office and their willingness towards holding related educational workshops.

  Materials and Methods: This analytic cross-sectional research was accomplished in Babol among 132 general and specialist dentists in 2010. A validated questionnaire (Knowledge and attitudes of reliability: Cronbach's α value 79% and 84% respectively) consisting of 17 questions about knowledge (score of 14-17: excellent, 11-14: good, 8-11 moderate and less than 8: poor), three questions about attitude and demographic characteristics was distributed. Data were analyzed using t-test, X2 and Pearson correlation statistics using SPSS.

  Results: 119 dentists (91.9%) filled out the questionnaire. The average age was 38.6 ( ± 7.5) years with 84 (70.6%) male and 35 (29.4%) female individuals. The average score of knowledge was 9.31 ( ± 2.31) out of 17 points which was negatively correlated to the graduation year (r=-0.43) and age of dentists (r=-0.3). 94% were agreed with workshops and 75% were agreed with equipment of office and emergency kit and 84.9% were not satisfied with the academic education in that field.

  Conclusion: Knowledge of dentists in Babol was not sufficient in the field of medical emergencies which needs intervention for improving and updating by means of holding workshops and continuing education program.

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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