Document Details Document Type : Thesis  Document Title : AN INVESTIGATION INTO THE RELATIVE استقصاء في الاستبقاء لمادتي اسمنت لاصق   Document Language : English  Abstract : This investigation was made in order to compare between the ability of polycarboxylate and phosphate cement to retain cast gold restorations. As well as the relative influence of water immersion and load application on the retentivity of both cements. 100 freshly extracted teeth were employed. Their surfaces were grinded to have constant flat and smooth surface of enamel and dentine. identical gold castings were obtained. The cements were manipulated in accordance with manufactures directions to obtain mixes of standared consistency required for luting purposes. The gold restorations were cemented to the respective tooth surface and the cement was allowed to hardened for a period of 5 minutes under a constant load of 5 kgms. The cement line was painted on with a copal varnish. Testing for retentivity included application of progressive tensile force to dislodge the cemented castings in an Instron testing machine at a cross head -speed of 1.0 mm/min and the retentivity was measured in terms of the load required to dislodge the gold castings from the test tooth surface.  Supervisor : Dr.Ali Nor  Thesis Type : Master Thesis  Publishing Year : 1984 AH 1984 AD  Added Date : Sunday, June 22, 2008  Researchers Researcher Name (Arabic) Researcher Name (English) Researcher Type Dr Grade Email فاضل محمود MAHMOUD, FADEL Researcher Master   Files File Name Type Description  AN INVESTIGATION INTO THE RELATIVE عربي.pdf pdf    AN INVESTIGATION INTO THEانجليزي.pdf pdf   Back To Researches Page