backgrounds and objectives:today, one of the most important environmental issues is solid waste produced in dentistry that because of the presence of hazardous, toxic and pathogen agents has special importance. in this survey, solid waste produced in hamadan dentistry laboratories and practical dentist offices is studied.materials and methods: in this descriptive study, from 24 dentistry labora...

Background & objectives: Increasing solid waste has made waste management an important challenge in developing countries. The purpose of this study is to comparative evaluation of the application of incineration technologies and other waste disposal methods in Iran using the Analytical Hierarchy Process (AHP) in 2019. Methods: In this descriptive-applied research, after making a hierarchy, the...

introduction traumatic lumbar spondylolisthesis is rare disease and in the literature, different surgical approaches, including anterior, posterior, or combined approaches (posterior and anterior) are used to treat the lesion. case presentation we treated a case of traumatic lumbosacral spondylolisthesis using posterior approach and the patient showed a satisfactory outcome. at the final follow...

A series of mixed Mn-Zr oxides with different molar ratios Mn/Zr (0.1-9) have been prepared by coprecipitation of manganese and zirconium nitrates and characterized by X-ray diffraction (XRD) and BET methods. It has been found that at concentrations of Mn below 30 at%, the samples are single-phase solid solutions (MnxZr1-xO2-δ) based on a ZrO2 structure. X-ray photoelectron spectroscopy (XPS) m...