Propolis is used directly on dentin to reduce dental sensitivity following posterior composite restorations. The research aims to test its effect on the bonding of composite to dentin in posterior composite fillings by scanning electron microscopy. T
he depth of penetration of the composite resin within the dentinal canals was evaluated by comparing the frequency of the presence of resin protrusions and measuring Their lengths and the thickness of the hybrid layer were measured in the three sample groups.
This research is the first descriptive and classifiable study of the Syrian
spores of mosses in Syria and Arab world by using the technique of scanning
electron microscope.
Samples have been collected from several areas from Syria and their names
have been defined and classified earlier.
The study of nine Spieces of Spores have been completed and their shapes,
different faces and the shapes of redundant which they carry and their
distribution by scanning electron Microscope are done in Jena University,
Germany. Their sizes have been measured and viewed in several sizes.
It has been noticed clear differences in Spores, in the Shape of concavity of
the frost face and in existence and relation of denseness and distribution of
redundant on the faces. So, The characters of Spores can be added to other
standards which are used in Classification of mosses.
