Background & Objective: There is plenty of fatty acids of omega-3 in Salmon Fish that affect brain development and function, therefore, this study aimed to investigate the effect of Salmon fish’s oil on learning avoidance in mature male rats.  Materials & Methods: In this empirical study, we used 40 mature male rats that were enrolled into control, sham and experimental groups. The...

gte mso 9]> 800x600 The defining feature of developmental criminology is the focus on offending in relation to changes over time in individuals and their life circumstances. Childhood and adolescence are the most central issues of developmental criminology and most researches are focused in practice on them. Developmental criminologists are concerned with questio...

Normal 0 false false false EN-US X-NONE AR-SA Mercury has been used in amalgam restorations for more than a century though it is poisonous and mercury vapor can endanger the health of patients and dental office staff. Therefore, they should be aware of its hazards and observe guidelines to prevent injury to nervous system, heart, kidneys, alimentar...

Normal 0 false false false EN-US X-NONE AR-SA Lever is a solid part that can turn on a fulcrum. There are three types of fulcrums. The efficacy of a lever system is measured by mechanical advantage. The first type of lever has the most and third type has the least mechanical advantage. The situation of muscles attachments and direction of forces on ...

Normal 0 false false false EN-US X-NONE AR-SA In 9 patients of 11-20 years old, Pulp response to phosphoric acid 37% during a 15 seconds etching period was studied. Class V cavities in cervical third of premolars were prepared as symmetrical couples. All the process was identical in both groups of case and control. In test group, 15 seconds etching...

Normal 0 false false false EN-US X-NONE AR-SA Periodontal ligament changes depend on amount, duration and type of forces. Teeth movement toward periodontal ligament starts from the initial hours by formation of pressure and traction areas. These areas as well as vascular system must be preserved under the forces. Bone loss is resulted from osteocla...

Normal 0 false false false EN-US X-NONE AR-SA 60 dental students were randomly selected to obtain upper and lower jaw impressions. After excluding some non-classic cases, 50 mandibular and maxillary casts ( 34 M/16F) have been prepared for studying. Measuring was done via  Boly Dial Guage collis  attached to the vertical part of a surveyor. Poster...

Normal 0 false false false EN-US X-NONE AR-SA Buccal surface of Extracted permanent teeth was divided into two parts and etched by 30, 37, 50 and 60% concentrations of phosphoric acid gel and solution. Sealant replica was obtained from the etched surfaces of 50% gel and solution and the samples were examined by scanning electron microscope (SEM). V...

Normal 0 false false false EN-US X-NONE AR-SA Currently, the application and use of porcelain inlays and onlays for anterior and posterior teeth that are made in laboratory is increasing. Present article is aimed to evaluate 1. Advantages of porcelain include their aesthetic, strength, low chair-side, biocompatibility and do not depending on metals...