JOURNAL OF ISLAMIC DENTAL ASSOCIATION OF IRAN (MAJALLAH-I-DANDANPIZISHKI)
Year:2000 | Volume:12 | Issue:1-2 (33)|Papers Count:17

There are many studies about micro leakage and different ways to prevent this problem. In the light of dissolving this problem many materials have been developed, one of these materials is varnish that is used for sealing amalgam restorations.Copal varnish is the oldest material which has been used in this field. Recently a few varnishes have been produced in Iran, for example: kimia, B.O.Iranian dentists are often doubtful in using these varnishes. Because Iranian varnishes are cheaper and more available than copal varnish, we decided to compare the resistance of these varnishes against microleakage beneath amalgam restorations.Summary of these results are:1. There isn't any significant difference between the resistance of the Iranian varnishes and copolite against microleakage but the ranking of the mean microleakage can be listed as below:                   B.D Varnish < Kimia Varnish < Copolite Varnish2. Varnishes are effective in reducing the microleakage between amalgam and cavity walls.3. The amount of microleakage in the occlusal wall of the cavities is less than the gingival wall.We can assure that we could use Iranian varnishes to reduce microleakage between amalgam and cavity walls.

The aim of this study ws evaluating about the timing of the peak of puberty growth spurt. Attention to individual's growth potential in growth spurt periods, for correction of skeletal discrepancies is useful.The jaw's growth specially in mandible, obey from general body growth in growth spurt periods. Thus we attained timing of the growth spurt in Esfahanian girls, with attention to in cerements in height and weight. Height and weight are reliable indices for evaluating growth spurts. 1830 Esfahanian girls were selected and were grouped in 9 groups (8 to 16 years old).By using SPSS program, the mean age of growth spurt and height and weight centiles and the mean age for menarch were divided. In puberty, the mean of the Peak of growth spurt in height was 12 years old and the mean of the Peak of growth spurt in weight was 13 years old.Thus for growth modification treatments, we must consider these ages and these treatment must begin before growth spurts.

Odontogenic infection are the common disease of human beings and is the greatest cause of loosing teeth.This research is based on streptococus Gram positive that is the main cause of dental abscess.This study is estathistical analytic which has been observed on 365 patients which referred with odontogenic infections to the Esfahan clinics for observation, sampling, culture and antibiogram resulting:1) The main group of coccies of odontogenic infection were a hemolytic streptococus.2) The most infective drug on a hemolytic streptococus was penicillin.3) The most involvement space was buccal moucosa of the mandible. Gram positive streptococus are the important factors of dental abscess and the first choice drugs are penicillin and the tetracyclin.

Introduction: The inter - relationship between ABO blood groups & infections has been extensively studied. In this investigation we studied this inter relationship.Methods: 103 patients of Isfahan dental faculty and some clinics that had removable prostheses were studied and the occurrence of denture stomatitis & angular chelitis, and sex & age of them were determined.Results: In this study 49 cases were male & 54 cases were Female. The ranges of their age were between 33-34 years. Among patients (D.S.+) 25 cases were male & 25 cases were female. 62% of patient (D.S.+) has "0" blood type, 50% had "B" blood type, 41% had "A" blood type & 20% had "AB" blood type. 48.5% of all cases had denture stomatitis but only all cases had angular chelitis. All the patients that had angular chelitis soffered from denture stomatitis, too.Discussion: The occurrence of denture stomatitis and angular chelitis varied depending on the blood type of the patients. Especially in blood group "O" compared with other types, both denture stomatitis and angular chelitis were found to be higher or more severe. In the "AB" blood group these infections were found to be less than other blood types.These results suggest that the ABO blood group is one of the etiologic factors of denture stomatitis and that denture wearers of blood group "O" are more susceptible to denture stomatitis.

The Etiology of bruxism appears to be related both to psychic and occlusal factors.The role of occlusion bruxism is highly controversial, and a review of various concepts has recently been published.The Purpose of this study was to determine the relationship of occlusal interferences and bruxism in 62 patients (36 males and 26 women) who had signs and symptoms of this parafunctional habit.The research showed that bruxism was highly related to occlusal discrepancies.Some occlusal features which can cause this habit in the order of hierarchy are as follows: slide from CR to CO, balancing side contacts, and finally working and protructive side Prematurities.

The Present study is a literature review about fibroblasts (fs) of periodontium that are the dominant cell types of the connective tissue in the body.An emerging concept is that fs are not hemogenous and can be separated in to subsets, on the basis of morphology, size, collagen subtype and their tissue localization. (Gingiva, PDL Or Granulation tissue (Gt)) For example myofibroblasts in Gt distinguished from other fs by their expression of desmin (a smooth muscle actin). They becoming contractile and thus promoting closure of wound.CD40 is a transmisable protein which some of fs display its expression especially in inflammation. It may interact with CD40 ligand on the other cells and activate secretion of cytokines. Thus by blocking this interaction could diminish damage of periodontal inflammation.Gingival Fs have the ability to produce cytokines like IL1b, IL-6, IL-8 and PGE2 in response to lipopolysaccharide (LPS) of microorganisms. This finding confirm the notion GFs function as accesory immune cells growth factors such as EGF, PDGF and TGFPl activate synthesis of collagen by Fs.Except intrinsic mediators, extrinsic factors as drugs or nicotine stimulate Fs. Nicotine prevents of fs proliferation. Nifedipine promotes collagen synthesis by Fs and induce gingival enlargement. But in here ditary gingival fibromatosis increased proliferation of fs, fibronectin and collagen contribute to clinical enlargement.

Gingival Recession as a periodontal defect which is found in all human societies and among all ages has attracted the attention of many scholars and researchers. Gingival recession and the subsequent root denudation can cause problems such as: improper appearance, reduction of the ability of the patient in keeping the area clean and increase of inflammation, increase of caries risk, abrasion of root and increase in dental hypersensitivity. As full knowledge of every problem is necessary in order to face it, the present writing tries to study the prevalence and incidence, causes, prevention methods, problems resulting from continuation of the defect and classification of different types of recession and there by give a rather complete analysis of the gingival recession.

One of the Problems with fixed orthodontic appliances is their visibility, and possible negative effects on patient's appearance during treatment. In this regard orthodontists have tried for a long time to design an appliance with minmal effect on appearance.By considering these facts lingual orthodontics has been developed and also gained popularity among patients.In this paper with a brief review of lingual orthodontics, one of these appliances (Thomas creekmore) and its clinical use has been introduced.

Early diagnosis of susceptible individuals to periodontal disease and determination of disease activity are important factors and in spite of wide spread advancement in periodontology, exact and definite ascertaining of these factors is not still possible.Use of gingival cervicular fluid components as a simple way for evaluation of condition and progression of disease in the present and future, Proposed by many authors and advance studies was performed on biologic substances of this fluid.There are different components in gingival cervicular enviroment but only a limited number of them are useful as a marker for chiarside evaluation of disease activity and the most important of these are: Aspartate aminotransferase, interleakin 1b ,b -glucuronidase, calprotectin, chondroitin sulfate - 4 and elastase.Surely, assigning of actual usefulness of results obtained from tests designed for assessment of this components need to longitudinal and comprehensive evaluation. However designing of dignostic kit with no complex instruments and procedure and with maximum accurcy and minimum of time saving to indicate disease activity and susceptibility of persons to disease progression, can profoundly influence on our treatment planing and quality of disease confronting.