We studied the fracture resistance of maxillary premolars restored with recent restorative materials. Fifty maxillary premolars were divided into five groups: Group 1 were unprepared teeth; Group 2 were teeth prepared without restoration; Group 3 were teeth restored with tetric ceram HB; Group 4 were teeth restored with InTen S; and Group 5 were teeth restored with Admira. The samples were test...

background and purpose: oxygen therapy is one of the common treatments for neonates with cardiopulmonary disease. the aim of this study was to evaluate adherence to oxygen therapy standards by nurses before, during and after using oxygen hood. methods: in this cross-sectional study, 250 cases of nursing care were evaluated before, during and after administration of oxygen hood therapy in preter...

neonatal sepsis, a life-threatening condition, presents with non-specific clinical manifestations and needs immediate empirical antimicrobial therapy. choosing an appropriate antibiotic regimen covering the most probable pathogens is an important issue. in this study we compared the effectiveness of ceftizoxime and amikacin in the treatment of neonatal sepsis both in combination with ampicillin...

abstract background: clinical guidelines are important instruments for increasing the quality of clinical practice in the treatment team. compilation of clinical guidelines is important due to special condition of the neonates and the nurses facing critical conditions in the neonatal intensive care unit (nicu). with 98% of neonatal deaths occurring in nicus in the hospitals, it is important to ...

The leakage characteristics of the bending-teeth gland, which may be helpful for the fast start and fast stop of the steam turbine, was discussed in this paper by using ANSYS6.1 software. By compared the flow fields in straight-teeth gland and bending-teeth gland, the methods for the bending-teeth gland to decrease the steam leakage was proposed. The results show that, although the leakage of t...

introduction: mineral trioxide aggregate (mta) has been suggested as an effective material for apical barrier, forming an effective seal against bacterial leakage in teeth with open apices. mta needs moisture for setting; which can come from the apical region or a moist cotton pellet. this study was intended to compare bacterial leakage in one- and two-step mta apical barrier technique in open ...

introduction: complete knowledge of root canal curvature is a critical factor in successful dental treatment .the aim of this study was to investigate the direction, radius and degree of curvature of maxillary anterior teeth and the relation between radius and degree of curvature in babol city. methods &materials;: this study was performed on 242 anterior teeth radiographs were taken by periapi...