The most important issue in human existence and survival is the safety and security,
came to build castles as an expression and reflection honest to this issue in detail, on the
one hand, the cumulative product met the experiences and melted in whi
ch all values of the
most important urban civilization landmarks on the other hand, of its art defensive large,
high architectural taste.
This research deals with the study of the concept of castles reviewing phases of
architecture throughout history, then an explanation for classification, types and
importance and finally made the social and geographical dimension of the castle and
concludes to establish a set of results for subsequent research in the future.
The aim of study: to determine the prevalence and probable predisposing
factors of RAS among the dental students (as thought by patients ) .
the study was cross- sectional one , carried out on
115 students of dental school of Damascus University , data was collected by
filling a questionnaire .