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Evaluation of Physical and ChemicalProperties of Saliva on Retention of Complete Denture (In Vitro Study) | ||
| Al-Rafidain Dental Journal | ||
| Article 8, Volume 11, Issue 3, 2011, Pages 58-66 PDF (147.02 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.33899/rden.2011.164436 | ||
| Authors | ||
| Amer A. Taqa; Tarik Y. K Bashi; Manar N Y Nazhat | ||
| Abstract | ||
| Aims of this research to study the effect of surface area on retention of complete denture. Materials and methods: Oral examination clinically, some of physical and biochemical analysis of human unstimulated whole saliva have been studied. They constituted in three groups (25 in each the first and the third group) and (50 in the second group). The first group was healthy and aged (20-30) years, the second group was healthy and aged (50-70) years, also the third group aged (50-70) years but with systemic diseases.The following parameters were studied: flow rate, pH, total protein, density, surface tension, viscosity and film thickness. Total protein concentration was responsible for physical and chemical changes specially viscosity. There was a direct positive correlation between total protein and surface tension, viscosity, density and film thickness, while there was a negative correlation between total protein and with flow rate and pH. The measurement of force due to surface tension of these samples have been done by preparing two pairs of circular discs of (PMMA) of (5.2,6.5) cm in diameter and compare of force between these groups, also compare these physical analysis with mathematic analysis. Results: indicated that in both the first and the third groups, the physical and mathematic analysis for retention showed non significant changes while in the second group showed significant changes. Conclusions :there was a positive correlation between force and wetted area and this force was due to wettability and not to water sorption. | ||
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