background: in modern life, the incidence of traumatic injuries increases daily. in accidents which lead to trauma, massive bleeding is the main cause of death. nowadays, many different chemical and herbal agents are available for quick control of bleeding. objectives: in this study, we compare the effectiveness of two different types of chemical agents for control of bleeding in an animal mode...

control of hemorrhage is one of the challenging situations dentists confront during deep cavity preparation and before impressions or cementation of restorations. for the best bond and least contamination it is necessary to be familiar with the hemostatic agents available on the market and to be able to choose the appropriate one for specifi c situations. this review tries to introduce the comm...

Background: Chemical warfare agents (CWA) were most notably used during the First World War in Europe, against Iranians and Kurdish citizens of Iraq at the hands of Saddam Hossein’s regime in 1980s and more recently in Syria. The use of CWA is banned under the international law. Methods: Ancient uses of CWA are not well studied. Recently, their use during the Persian siege of the Roman-held Dur...

root resorption (rr) is defined as the loss of dental hard tissues because of clastic activity inside or outside of tooth the root. in the permanent dentition, rr is a pathologic event; if untreated, it might result in the premature loss of the affected tooth. several hypotheses have been suggested as the mechanisms of root resorption such as absence of the remnants of hertwig's epithelial root...