Journal of Dental School
Year:2001 | Volume:19 | Issue:1|Papers Count:12

Intentional replantation has been suggested as an acceptable replacement to conventional endodontic procedure when either conventional or surgical endodontic treatment could not help in treatment of the lesion.During the past few decades controvercies have developed with respect to the value of this technique. This article will examine the role of intentional replantation in dentistry and review indications and contraindications, treatment rationale, technique, and factors affecting success.There has been controvercies on the Successfulness of the technique. A comprehensive review has been conducted with report of a case carried out on this method.

Drug abuse is growingly known as a disaster to mankind as overwhelmingly involves a great number of the world population.This study was designed to evaluate the effect of drug abuse on periodontium and caries development.A group of 100 addicts with 100 culturally matched healthy men were selected for this study. Data collected include: CPITN, oral hygiene implication, caries incidence and xerostomia.Results showed mean periodontal index to be at 2.9 for addicts and 2.5 for control group.Xerostomia had occurred in half of the control group where as this was as high as 78% in study group.Occlusal caries incidence were equal among the study and control group, while cervical caries were found to be two times more in study group.In conclusion: Poor Oral hygiene is the prime cause of periodontal disease and caries among the addicts and its importance should be reinforced.

The Purpose of this study was to evaluate the output intensity of light curing units in private dental office in Tehran 1998. This study was carried out by testing 302 light source units using a Radiometer. In addition all factors affecting the intensity of light were also evaluated. Results showed that 33.4% of the light source units have adequate intensity for complete polymerization of the composite where as 60.6% of the cases had their intensity below the acceptable level. This was while 22.9% of the cases could not provide enough intensity and to compensate they need more time to perform in complete polymerization process.

With regards to the high prevalence of temporomandibular joint disorders (TMD), their side effects and various reported prevalences this study was done to determine the epidemiology of TMD in 260 students of school of dentistry, Shahid Beheshti University of Medical Sciences. Random Sampling was done. Age, Sex, malocclusion, pain, sound, muscle tenderness, maximum vertical opening, premature contacts, tooth wear, clenching and bruxism were studied.The prevalence of TMD was 46.5 percent: clicking 22 percent, limitation of jaw movement 12.2 percent, pain 4.7 percent and 7.6 percent had two or three of these symptoms. prevalence of clenching and bruxism was more in females pain was more in Females with clenching. In 52.6 percent which atleast had one of the TMD symptoms, dental procedures were responsible for beginning of TMD. Chewing the hard food caused more pain and clicking.In comparison with another studies, it can be assumed that age, sex, job, geographical and social conditions and the method of study effect the results. Thus, it is proposed to assess TMD in various areas, ages and jobs specially in dental students of another Universities to reveal the causes and problems and try to relieve them.

The aim of this study was to evaluate the prevalence of caries free preschool children from a social viewpoint in Mashhad - Iran.A group of 745 children aged 3-6 years were included for examination from kindergartens by a random sampling manner (140 males, 116 females).Fluoride content of drinking water is measured at OAPPM for the city of Mashhad where the study was performed. Inter and intra examiner reliability were assessed (P<0.05). This study was conducted in a deprived and a non deprived area of the city of Mashhad. WHO criteria was used for the examination and diagnosis of dental caries.Results showed only 22% of these preschoolers with no caries (dmft=O). No significant deference was found on caries experience for male and female cases.Prevalence of caries free cases in deprived area and non-deprived area were 16% and 26%, respectively. The difference between these groups was found to be significant (P<0.05).It is concluded that the lowest percentage of CF was belong to the children in deprived area which decreases with age.

External apical root resorption is a common and occasionally critical problem in orthodontic treatment of patients.The aim of this investigation was to study any root resorption occurrence in orthodontically treated first mandibular molars and its relationship to the following factors: age, sex, type and the duration of orthodontic force.A total of 92 first permanent molar teeth were selected for assessment on 46 panoramic radiographs. Radiographs were taken from 14 boys and 32 girls. 37 teeth had been treated using extrusion with tipping while 54 teeth had only tipping.No evidence was found for a sex or age difference in susceptibility. The type and duration of the orthodontic forces also displayed no significant association with root resorption.Results suggest that other unknown factors are responsible for this adverse tissue reaction. It seems useful to assess the biochemical factors causing similar differences in root resporption susceptibility.

A difficult clinical management is considered for Patients with Cl II malocclusion and severe deep bite. This is due to the fact that any changes lead the situation to a deeper and traumatic bite. High pull J Hook Head gear (H.J.H.G) with an extra oral anchorage has been introduced as being able to easily intrude anterior teeth in association to the use of a rectangular wire. This combination has a good control on root torque. This article discusses the clinical aspect of H.J.H.G with presentation of a case.

Blood- borne infections such as hepatitis B, C, and HIV infections are proved to be transmittable by dental procedures. Sterilization and protective measures are known as a critical part in cross infection control in dental practice. This study looks at infection control measures taken by 450 dentists who participated in this survey. Dentists attended to the 38th annual congress of Iranian Dental Association were questioned using a comprehensive questionnaire. Results showed that more than 69.4% of the participants "always" used gloves during dental treatments. Accordingly, 82.1% of them "always" used facemask. Dry heat was the most common method of sterilization, used by 95% of the dentists. However, only 10.4% of these practitioners knew the proper timing and temperature setting for dry heat sterilization.

An epidemiologic survey was carried out to determine the prevalence as well as etiology, side effects and complications associated with management of oral and maxillofacial trauma cases referred, to taleghani General Hospital during 1995. A total of 1698 patients case notes were evaluated both male and female. Results indicated that the proportion of males to females being at 74.5 to 25.5. The average age was 21.2±14.2. The most usual causes of trauma were Violence and Car accident in men, while fall, Violence and Car accident were respectively more frequent as the cause in women.  

Chronic dental periapical lesions are inflammatory reactions against microorganisms. During this reaction alveolar bone resorption occurs. As factors of immune system are seen in periapical lesions, this system should therefore be considered as responsible in pathogenesis of these lesions. Due to the presence of large amount of histamine and mast cells a this research was planned to determine any correlation between IgE and the size of chronic periodical lesion.A group of 50 chronic periapical lesions in 50 individuals were selected which were subsequently divided into two groups. The first group with radiographic diameter of ≤ 5 mm (Small lesions or control group) and second group with radiographic diameter of the lesion being more than 10 mm (Large lesions or case group). Presence and average concentration of IgE in large lesions were found to be at %69.2 and 19.9±24.01 IU/ml. These amounts were 60% and 6.32±8.08 IU/ml in small lesions, respectively. Using Chi square and t test, statistically no significant difference was found between two groups with regard to IgE presence while a statistically significant difference was found between two groups with regard to IgE concentration (P<0.01). It is concluded that with enlargement of chronic periapical lesions, there is some increase in the amount of bacterial allergens released, which in turn results in an increase in IgE concentration. This could lead to type- I hypersensitivity reaction (allergy).

This study was performed to assess anatomical changes in women suffering from osteoporosis, in 1998.This investigation was conducted on 86 female patients with more than 20 years of age who were referred to the Department of oral radiology for a panoramic radiograph. Using these panoramic radiographs, Vertical height of mandible was measured in the region of mental foramen. The distance between mental foramen to the inferior border of mandible was considered as the index in addition to the cortical morphology, and the thickness of inferior cortex. All selected cases had both premolars present with no history of any systemic or hormonal diseases. Bone resorption was evaluated with the factors including: age, menopause, marriage, number of pregnancies and level of education.Results revealed that bone resorption increases with age, menopause and multiple pregnancies.Surprisingly, those with higher level of education had a lower rate of resorption. It is concluded that, anatomic indices could lead to the diagnosis of bone resorption rate and help in an on time diagnosis of osteoporosis.

Median rhomboid glossists are the atrophic lesion of mid-dorsal surface of the tongue, with the incidence of 0-3.34%. It is usually with no symptoms and has an unknown etiology.In order to investigate the relationship between diabetes and MRG, 220 diabetic patients were clinically examined from those referred to Shariaty, Taleghani General Hospitals and the Institute of Metabolism and Endocrinology - Tehran during Oct 1998 to Jan 1999. A total of 220 patients were examined as control from those referred to Shahid Beheshti Dental School who had no history of any systemic disease, Smoking or the use of denture and matched by age and sex. In addition, two cytological smear samples were taken, one from MRG region and one from anterior, normal, part of the tongue of 15 proved MRG as well as 5 control cases. Results proved MRG in 10 diabetic patients and 2 control cases. This difference was statistically significant (P<0.025). Candida mycelia in MRG area was found to be 3.5 times more than normal anterior area of the tongue in diabetics (P<0.06).In conclusion: there seem to be a relationship between diabetes and the presence of MRG.