The aim of this study was to evaluate the effect of sealer application and thermal cycling on the bond strength between tissue conditioners and acrylic resin, and to observe the type of bond failure. Two hundred eighty-eight specimens (10x16x3 mm) were made of an acrylic resin (Lucitone 500, Dentsply) using a metal muffle. Specimens were divided into four groups according to the tissue conditio...

characteristics of precipitation and the regionalization major role in the efficient use of water resources and soil and management of environmental hazards. regionalization of rainfall can help to better use of water resources and to correct manage of environmental hazards. according to the analysis of climate phenomena such as precipitation, all data should be related to a homogeneous region,...

Background: Palliative whole brain radiotherapy (WBRT) has been the standard treatment for brain metastases. Ionizing radiation is known to be one of the most potent cataractogenic agents. We aimed to evaluate two different radiotherapy techniques with respect to the doses received by the organs at risk (OAR) in patients with brain metastasis who undergone WBRT. Materials and Methods: Ten conse...

introduction: computed tomography (ct) and cone-beam ct (cbct) are valuable diagnostic aids for many clinical applications. this study was designed to compare the gray scale value (gsv) and hounsfield unit (hu) of selected dental materials and various hard tissues using ct or cbct. methods and materials: three samples of all test materials including amalgam (am), composite resin (cr), glass ion...

Background: Tangential irradiation of intact breast is one of the most common procedures performed in any radiotherapy center. This method is performed by using 2D and 3D treatment planning. The aim of this study was to compare 2D with 3D plans in breast conserving radiotherapy. Homogeneity of isodose, and lung received dose were compared. Materials and Methods: Twenty patients with br...

OBJECTIVES These studies investigated (1) the effect of community bans of self-service tobacco displays on store environment and (2) the effect of consumer tobacco accessibility on merchants. METHODS We counted cigarette displays (self-service, clerk-assisted, clear acrylic case) in 586 California stores. Merchant interviews (N = 198) identified consumer tobacco accessibility, tobacco company...

In this study, trialkoxycapped poly(methyl methacrylate) (PMMA)-silica hybrid films were successfully prepared for optical applications. The acrylic copolymer precursor with alkoxy side group was prepared using 2,2’-azobisisobutyronitrile (AIBN) as the initiator first. Then, it was reacted with partially hydrolyzed tetraethoxysilane solution, followed by spin coating and curing to obtain the th...