| dc.description.abstract | The Effect of Oregano Gel (Origanum Vulgare) Addition to Auto-Polymerized Silicone Soft denture liners on the Bond Strength to Heat-Cured Acrylic Denture Base Resin Based on Duration of Use
xv + 74 pages
Complete Dentures are removable prosthetic appliances designed to replace all missing teeth and associated structures in both the maxillary and mandibular arches. The fabrication of complete dentures aims to restore masticatory function, speech, esthetics, and psychological well-being, as well as to correct disturbances, abnormalities, and diseases caused by edentulism. The most commonly used base material for complete dentures is heat-cured acrylic resin (HCAR). One method to improve the retention of complete dentures is relining. The objective of relining is to reline the denture base with a soft denture liner (SDL) to restore its function, improve the health of the soft tissues, and enhance patient comfort. A material that can be used for relining is soft denture liner (SDL). Several studies have incorporated natural antifungal agents such as oregano leaves (origanum vulgare) in the form of oregano gel. This study aimed to evaluate the effect of adding oregano gel to auto-polymerized silicone-based soft denture liners on bond strength, based on the duration of use. The samples in this study consisted of heat-cured acrylic resin and auto-polymerized silicone soft denture liners, fabricated using rectangular molds measuring 40 mm × 10 mm × 10 mm, with a tapered end measuring 15 mm × 10 mm × 8 mm. A total of 40 samples (n=40) were divided into 8 groups (n=5). The samples were incubated at 37°C for 1 and 7 days in artificial saliva, with added nistatin, and with the addition of origanum vulgare gel. For the 0.5% sodium hypochlorite immersion groups, the samples were first incubated at 37°C for 24 hours to simulate the oral environment, followed by immersion in 0.5% sodium hypochlorite solution for 15 and 105 minutes, corresponding to 1-day and 7-day usage simulations. Bond strength was measured using the tensile strength method with a Universal Testing Machine (UTM). The data were analyzed using univariate analysis to determine the mean and standard deviation of bond strength in each group. A one way ANOVA was used to determine the effect of denture usage duration on the bond strength of auto-polymerized silicone soft denture liners in artificial saliva, 0.5% sodium hypochlorite, nistatin, and origanum vulgare gel groups, as well as the effect of origanum vulgare gel addition based on usage duration. The univariate analysis showed the following mean ± standard deviation values of bond strength, Artificial saliva (1 day): 0.61 ± 0.36 MPa, 0.5% sodium hypochlorite immersion (1 day): 0.91 ± 0.026 MPa, Nistatin (1 day): 0.80 ± 0.017 MPa, origanum vulgare gel (1 day): 0.98 ± 0.042 MPa, Artificial saliva (7 days): 0.54 ± 0.006 Mpa, 0.5% sodium hypochlorite immersion (7 days): 0.64 ± 0.007 MPa, Nistatin (7 days): 0.61 ± 0.16 MPa, and origanum vulgare gel (7 days): 0.69 ± 0.006 MPa. The two-way ANOVA analysis revealed a significant effect (p=0.001, p<0.05) of usage duration 1 day and 7 days. In conclusion, the addition of origanum vulgare gel to auto-polymerized silicone soft denture liners can improve bond strength.
References: 56 (2012-2024) | en_US |
