فهرست مطالب samaneh badakhsh

Supernumerary tooth (ST) is considered as a developmental tooth abnormality in number that most often occurs in the anterior region of the maxilla. They may erupt or remain impacted in the alveolar bone. The impacted teeth can cause eruptional disturbances for the adjacent developing teeth.CASE REPORT: A case of bilateral supplemental maxillary lateral incisors in a nonsyndromic 9-year-old boy, with no adverse effect on the adjacent teeth, is reported. Patient’s medical history was non-contributory. Family history was negative for any dental abnormality. Radiographic assessment of both dental arches can discover any potential problem likely to develop during the course of the child’s growth. Early diagnosis is important in order to minimize the risk of complications. Formation of supplemental lateral incisors occurs less frequently, and bilateral cases are rarely found.

Tooth avulsion is one of the most severe dental traumas which most often occur in children. When immediate replantation is not possible, storage in a proper media may lead to a prolonged survival rate. Aloe Vera is a cactus like plant with green, tapered leaves that are filled with a transparent viscous gel. This medicinal plant has significant anti-inflammatory, antioxidant, antibacterial and antifungal effects. The purpose of this study was to assess the effectiveness of different concentrations of Aloe Vera extract compared to DMEM (cell culture medium) and egg white. The periodontal ligament (PDL) cells were cultured and certain number of cells were treated with Aloe Vera extract (in four different concentrations), egg white and culture media for 1, 3, 6, and 9 hours. Cell viability was determined by using the (3-[4, 5-dimethylthiazolyl-2]-2, 5-diphenyltetrazolium bromide) assay. Moreover, One-way ANOVA and post hoc (LSD) test were used for analyzing the study groups. The results indicate that culture media and Aloe Vera extract (10, 30, and 50% concentration) were statistically similar and significantly preserved more PDL cells compared to other experimental storage media. Aloe Vera 10, 30, and 50% may be recommended as a suitable storage media for avulsed teeth.

Tooth avulsion is defined as the complete displacement of the tooth out of its alveolar socket. The treatment of choice is immediate replantation or if that is not possible, placement of the tooth in an appropriate storage media. This report presents replantation of an avulsed maxillary central incisor after 12 hours of storage in milk. The tooth was replanted and splinted. One week later, it was treated endodontically and calcium hydroxide dressing was placed for 1 month; subsequently, the tooth was obturated with gutta-percha. During three years of follow-up, no evidence of ankylosis or inflammatory resorption was observed. After three years, the tooth was stable and remained functional and esthetically acceptable.

Following avulsion, the periodontal ligament (PDL) cells are at risk of necrosis. To achieve a favorable survival prognosis, the PDL cells must be kept viability. Therefore, immediate replantation is considered as the treatment of choice and in case it is not possible, storing the tooth in an appropriate storage media should be considered. Oral Rehydration Solution (ORS) is a glucose-electrolyte solution which can keep the optimal osmolality as well as pH and can even provide nutrients which are necessary for cellular growth. The present study aimed to evaluate the effectiveness of different concentrations of ORS in maintaining the viability of the PDL cells at different time points. PDL cells were obtained from healthy extracted human premolars. Then, 8×10³ cells were seeded in each well of 96-well plate. Afterwards, each well was treated with ORS in three different concentrations and DMEM for 1, 3, 6, and 9 hours. Cell viability was determined by using the MTT assay. One way-ANOVA and post hoc (LSD) test were used for comparing the study groups. According to the results, 25% and 50% concentrations of ORS were more effective in preserving the PDL cell viability and could maintain 79.98% and 68.34% of the PDL cells, respectively, at least for the last experimental time point (up to 9 hours). Therefore, our findings indicate that ORS might be a suitable storage medium for avulsed teeth.

Ectodermal dysplasia is a hereditary disorder associated with abnormal development of embryonic ectodermally-derived organs including teeth, nails, hair and sweat glands. Hypodontia of the primary and permanent dentition is the most common oral finding. Therefore, affected patients need dental prosthetic treatments during their developmental years. This report presents two cases of children affected by ectodermal dysplasia with anodontia. Oral rehabilitation was accomplished with removable acrylic prostheses. Treatment had major impacts on self-esteem, masticatory function, speech and facial esthetic.

Interest, motivation, and satisfaction toward job are the factors guarantee the success in occupation. Job satisfaction itself is influenced by social factors. The rising admission rates of dental schools have further increased the anxiety of their students in recent years. This investigation was conducted on dental students to assess their attitude toward future career and the discipline at the time of entrance and graduation. This descriptive cross-sectional study was carried out on 140 dental students of Shiraz University of Medical Sciences within academic years 2010-2011 using a questionnaire made by researcher. The items of the questionnaire were about students’ attitude toward their discipline and future career. Data was analyzed by Kolmograph-Smirnove, ANOVA, and t-test. The mean of total scores for the questionnaire related to student’s attitude toward their discipline (33.97+ 4.46) was higher than its theoretical mean score (27). The mean of total scores for the questionnaire related to student’s attitude toward their future career (16.42 +2.61) was lower than its theoretical mean (18). Investigating the difference between attitude toward discipline and future career among students of different semesters and age groups revealed no significant difference. Accordingly, no significant statistical difference was also realized between male and female students regarding the attitude toward discipline. But a statistically significant difference was observed between genders considering the attitude toward future career (P=0.037). This study showed that dental students of Shiraz University of Medical Sciences are interested in their discipline whereas their attitude toward future career was not desirable. This represents their anxiety toward future career. The results of this study could be taken into consideration for future planning and therefore open up a brighter horizon for the future career of these students.