http://jdm.tums.ac.ir Journal of Dental Medicine - Journal articles for year 1994, Volume 7, Number 2 Yektaweb Collection - https://yektaweb.com en 1994/7/10 http://journals.tums.ac.ir/jdm/browse.php?a_id=653&sid=1&slc_lang=en The aim of digital subtraction of radiographic images is eliminating the additional shades to increase the resolution and quality of the images. In dentistry, digital subtraction technique can be used for diagnosis of progressive periodontal diseases or evaluation of the amount of jaw bone repair or destruction. In this study, the possibility of digital subtraction with non-expensive techniques by the use of a personal computer has been investigated. To do so, first we prepared initial we digitalized the obtained radiographs by the use of a scanner. Then we tested the subtraction on two available scanner-specific soft wares which had the ability to digitally subtract the images. The results have been discussed in the full text of the article. E. Mozafari http://journals.tums.ac.ir/jdm/browse.php?a_id=652&sid=1&slc_lang=en There has been a lot of development in the science of implantology since forty years ago when extensive research began on this field of science. The use of Dental Implantology has also increased in the last decade, which the main reason is the success of it. Recently some of our colleagues participate in short time Introductory and advanced courses of implant inside or outside the country and begin to use implants. Unfortunately, due to the insufficient period of time, there is no discussion of basic sciences of dental implantology. So we decided to partially fill this gap by writing this article. Sh. Namjo Nik http://journals.tums.ac.ir/jdm/browse.php?a_id=651&sid=1&slc_lang=en The microleakage of Cinaally amalgam, manufactured by Dr Faghihi Co. which is a high copper alloy and fine-cut amalgam was evaluated by radioisotope agents. The microleakage of cinaally amalgam was compared with Sybraloy amalgam, manufactured by Sybron/Kerr Co. which is a high copper alloy and spherical shape amalgam and is known as a standard amalgam alloy. The results showed that there is no statistically significant difference between microleakage of them after 24 hours, one month and two months. K. Khosravi http://journals.tums.ac.ir/jdm/browse.php?a_id=650&sid=1&slc_lang=en This study was conducted on the secondary school students by actively patient selection method it means that patients did not go to see the doctor themselves. The studies were randomly selected among the schools located in areas of average socioeconomic status. Although geographic and fissured tongue disorders with no discomfort and with clinical sign are common phenomena, they are detected and diagnosed in clinical and collective examinations. people recognition and awareness about them and what they should do when they occur with Syndromal signs are important. Patients usually complain of pain and irritation of the tongue specially during eating spicy and sour food, because the bare part of tongue cannot tolerate the direct contact with such foods. This chronic irritation may cause the fear of cancer (Cancerophobia) in patients. It should be pointed out that geographic tongue can be caused by known skin diseases like psoriasis or might be manifested as an allergic reaction to medicines like lithium. In this study we evaluated the relationship between grooved and geographic tongue and age, race, skin color, frequency of brushing, gum status, discomfort of tongue irritation and mouth breathing habit. S. Shamsedini http://journals.tums.ac.ir/jdm/browse.php?a_id=649&sid=1&slc_lang=en Temporo Mandibular Joint disorders are the most important ethiologic factor for chronic orofacial pain and have a relatively new place in scientific researches and clinical studies in dentistry. Since dentists can play an important role in diagnosis and treatment of these disorders, routine dental examination should include functional examination of osteomatognatic apparatus. Sh. Jafari http://journals.tums.ac.ir/jdm/browse.php?a_id=648&sid=1&slc_lang=en Malignant lymphoma is the neoplastic transformation of Cells, mostly originating from lymphoid tissues. Malignant lymphoma has two major subtypes: Hodgkin and non-Hodgkin lymphoma. Malignant lymphoma is the most common neoplasm in 3rd and 4th decades of life and more than two third of affected patients presented painless peripheral lymphadenopathy. Involvement of waldeyer’s ring, epitrochlear and mesenteric lymph nodes is more likely in non-Hodgkin lymphoma. Approximately 20% of patients with non-Hodgkin lymphoma have mediastinal adenopathy. Most often, these patients may suffer from persistent cough, chest discomfort or maybe referred without any complaint and just with an abnormal chest radiograph. Z. Tohidast Ekrad http://journals.tums.ac.ir/jdm/browse.php?a_id=647&sid=1&slc_lang=en Undoubtedly, Tooth decay is still one of the most significant problems in human communities. Tooth decay is defined as a microbial disease that causes demineralization of hard tissues and degradation of organic components of teeth. Although there are various theories on etiology of dental caries, Miller’s acidogenic theory (1890) and Gottileb’s proteolitic theory (1933) have gained the most credibility among the others. In general, status and amount of saliva, oral hygiene, tooth structure, type and quantity of microorganisms and diet are the most important factors that can lead to tooth decay. Since the manner and type of child nutrition during infancy is considered as a significant factor in development and progression of dental caries and also there has not been published any research on this subject in Iran yet, this study was designed and carried out to find the association between the type of milk intake in infancy and the rate of dental caries in 3-5 year old children. J. Mahmodian http://journals.tums.ac.ir/jdm/browse.php?a_id=646&sid=1&slc_lang=en Tooth Transplantation from one individual to another is a method of replacing missing teeth. This method can be used as an applicable clinical treatment technique due to its numerous advantages .There are different methods of tooth transplantation. Among those, the safest and healthiest is transplantation of non-vital teeth or allostatic transplantation. In this method, the risk of antigenicity in recipient is low and also there is no risk of transmission of infectious diseases such as Hepatities or AIDS. The aim of this study was to evaluate the clinical results of tooth allotransplantation. Current study was conducted on 15 non-vital transplanted teeth within 18 months follow-up. Only one case of rejection was observed which was a Traumatic Rejection. Replacement resorption was found in all the cases while inflammatory resorption was recorded in only two cases. WBC Cross Match Test with pannel cell results were negative in all the cases. AH. Fakhraie