Repairing of Steel Pipelines Defects by Using Epoxy Material

This research carries how to do steel pipelines defects repair process by a simple and easy way. At first the region that surrounds the defect is cleaned then the epoxy material is put over the defect after mixing the resin with the hardener well. Epoxy layer dimensions depend on the defect dimensions that exists in the pipe. After that, the specimen is released for a period of time to obtain the setting process. Several types of epoxy were used for preparing series of specimens, which were tested on the pressure set up to estimate the efficiency of this way in the repair, and knowing the pressure values that epoxy layer can carry. A pipe of three holes their radius are equal, was treated by using ALTECO QUICK EPOXY STEEL and the pressure gauge recorded many values that reached 18 bar. The curve, that represents the relationship between the pressure which the epoxy layer carried and its surface area, was drawn. It is found that the most effect factor in the repair process is the specimen preparing and the thickness of the epoxy layer.

A clinical study to evaluate the effect of hyaluronic acid on periodontal infra-bony pockets during four months

Esterified hyaluronic acid has emerged into the periodontal regenerative therapy recently, but there is still a need for more research of its role in periodontal treatments, therefore the goal of this clinical study is to assess its role in the treatment of periodontal infrabony defects in comparison to open curettage.