ABSTRACT
Background:Patients with xerostomia complain of not only dryness of mouth but also discomfort during routine normal oral functions like speaking and swallowing. These complainis worse in individuals wearing removable intraoral dental prosthesis. In such situations, when salivary flow decreases, denture adhesives and salivary substitutes are recommended; which aid in denture retention and improve patient comfort.Material & Method:A total 150 samples were prepared using heat-cure acrylic resin of 30mm×30mm×5mm. All samples were equally divided in A,B,C,D,E groups,wherein Group A was control group with salivary substitutes.Group B was denture adhesive cream without salivary substitutes.Group C was denture adhesive cream with salivary substitutes.Group D was denture adhesive strips without salivary substitutes.Group E was denture adhesive strips with salivary substitutes.The retentive force was measured for all samples usinguniversal testing machine.Results:Data was collected and statistical analysis was done by one-way ANOVA test followed by post hoc test. The significant difference was found between the retentive forces of cream type and strip type denture adhesives withor without salivary substitutes.Conclusion:From this study, it is concluded that denture adhesive will definitely increases the denture retention. The cream type denture adhesive with salivary substitutes has the most retention than among all groups.
ABSTRACT
La literatura revisada para el presente artículo requirió el análisis de aspectos reológicos aplicables a la saliva humana y los sustitutos salivales. La saliva cuenta entre sus componentes glicoproteínas tipo mucina, las características bioquímicas de dichas glicoproteínas le confieren a la saliva sus propiedades reológicas, tales como viscosidad, lubricación y elasticidad. Las moléculas de mucina en solución presentan asociación y gelificación; la dinámica de estos procesos se ha estudiado por diversas técnicas e instrumentos. La hidratación de las mucinas es necesaria para que estas se gelifiquen, y le confieran a la saliva (o sus soluciones), viscosidad, lubricación y elasticidad, los mecanismos para que esto ocurra se apoyan en un Equilibrio de Donnan, sin embargo, en el fluido salival humano, la concentración fisiológica de mucina es tal que no permite la observación de gelificación. No obstante, a concentraciones mayores sí podría ser observada. Se han realizado estudios para el desarrollo de sustitutos salivales con compuestos de naturaleza glucídica y con mucinas extraídas de diversos tejidos animales, individualmente y en mezcla, con el objeto de aliviar la sintomatología de patologías que disminuyen el flujo salival, estos estudios han demostrado que la mucina extraída de glándulas submandibulares de bovino es la que mejor se adapta a los parámetros reológicamente deseables para un sustituto salival.
In this review it is considered the rheological aspects of human saliva and salivary substitutes. Saliva has mucin like glycoproteins, which confer saliva its rheological properties, such as viscosity, lubrication and elasticity. Mucin molecules have gel forming properties; the dynamic of this process have been widely discussed. Mucin hydration is necessary for gelification and lubrication, mucin hydration confers saliva, viscosity, elasticity and lubrication properties, the hydration mechanism is based on a Donnan Equilibrium. The physiological concentration of mucins in human saliva is not sufficiently high to show gelification, however, this property can be displayed at higher concentrations. Sugar derivatives and animal mucins have been studied, either isolated or at mixtures for the development of salivary substitutes, these studies showed that mucin extracted from bovine submaxillary glands is best suited to accomplish the desirable parameters for a salivary substitute.