this field study was conducted  to investigate barriers to applying principles of management in wards of tehran university on medical science hospitals: head nurses' viewpoints .75 hednurses who  were working  in selected hospitals affiliated to tehran university of medical sciences. the data collection tool was a questionnaire that  it,s validity and reliability was obtained using content...

This in vitro study evaluated the coronal and apical marginal microleakage of four self-etch, seventh generation adhesive systems. Sixty non-carious human molars were randomly assigned to four groups (n = 12). Class V cavities were prepared on the facial or lingual surface of each tooth with coronal margins in enamel and apical margins in cementum (dentin) at the cementoenamel junction. The pre...