Abstract
IntroductionThe aim of this study was to evaluate & compare the wetting ability of five saliva substitutes & distilled water on heat-polymerized acrylic resin. Contact angle of the saliva substitute on denture base can be taken as an indicator of wettability. Good wetting of heat-polymerized acrylic resin is critical for optimum retention of complete dentures.MethodsTwo hundred & forty samples of heat-polymerized acrylic resin were fabricated using conventional method. 240 samples divided into 6 groups with 40 samples in each group. Advancing & Receding contact angles were measured using Contact Angle Goniometer & DSA4 software analysis.ResultsAnova test was carried out to test the significance in difference of contact angle values in the six groups. The mean of advancing angle values & mean of receding angle values of all the six groups has shown statistically significant difference between the groups. The mean of angle of hysteresis values of all the six groups are statistically not significant between the groups. A multiple comparison using Bonferroni’s test was carried out to verify the significance of difference between the contact angles in a pair of groups. Statistically significant difference was seen when Aqwet (Group II) was compared to Distilled water (Group I), Wet Mouth (Group III), E-Saliva (Group IV), Biotene (Group V), and Moi-Stir (Group VI).ConclusionThe contact angles of five saliva substitutes and distilled water were measured and compared. Group II (AQWET) has the lowest advancing and receding contact angle values and the highest angle of hysteresis on heat-polymerized acrylic resin. Based on contact angle values, Group II (AQWET) has the best wetting ability on heat-cured acrylic resins. The ability of saliva to wet the denture surface is one of the most important properties for complete denture retention in dry mouth cases.
Highlights
The aim of this study was to evaluate & compare the wetting ability of five saliva substitutes & distilled water on heat-polymerized acrylic resin
The study comprised of 240 acrylic samples of which 40 samples were used to measure advancing and receding contact angles of Distilled water which were considered as Group I, 40 samples were used to measure advancing and receding contact angles of Aqwet which were considered as Group II, 40 samples were used to measure advancing and receding contact angles of Wet Mouth which were considered as Group III, 40 samples were used to measure advancing and receding contact angles of E-Saliva which were considered as Group IV, 40 samples were used to measure advancing and receding contact angles of Biotene which were considered as Group V, 40 samples were used to measure advancing and receding contact angles of Moi-Stir which were considered as Group VI
Anova was carried out to test the significance in difference of contact angle values in the six groups: The mean advancing angle of distilled water was 89.1350, aqwet was 76.6750, wet mouth was 88.9050, E-saliva was 83.6200, biotene was 87.5850, moi-stir was 86.0550
Summary
The aim of this study was to evaluate & compare the wetting ability of five saliva substitutes & distilled water on heat-polymerized acrylic resin. Group II (AQWET) has the lowest advancing and receding contact angle values and the highest angle of hysteresis on heat-polymerized acrylic resin. Based on contact angle values, Group II (AQWET) has the best wetting ability on heat-cured acrylic resins. The physical factors are further divided into adhesion, cohesion, interfacial surface tension, and atmospheric pressure These physical factors operate in the fluid film between the denture base and the mucosa. The patients who wear complete denture prosthesis depend on this oral fluid to provide retention and at the same time to prevent friction between the dentures and the mucosa. Denture wearing may become difficult because dry mouth can significantly add to the problem of retaining and eating with the dentures, which invariably become loose
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