Effect of Incorporation of Silver Nanoparticles on the Tensile Bond Strength of a Long term Soft Denture Liner

Abstract

Objectives This study aimed at assessing the effect of the addition of silver nanoparticles (SNPs) to a silicone soft liner on its tensile bond strength to denture base resin. Materials and Methods SNPs were added to Mucopren cold cure soft liner in 0 (control), 0.5, 1, 2, and 3 wt% concentrations and bonded in 120 stainless steel molds with processed heat cure acrylic resin blocks. Liner/resin combination samples were divided into two groups. The first half was stored for 2 days in distilled water at 37°C and then subjected to tensile bond strength, while the other half were thermocycled 3000 times before testing. Mean bond strength, expressed in mega pascals (MPa), was determined in the tensile test with the use of a universal testing machine at a crosshead speed of 5 mm/min. Statistical Analysis Data were analyzed using SPSS via one-way analysis of variance test, t-test, and Tukey’s posthoc, at a 95% confidence level (p < 0.05). Results Addition of SNPs and thermocycling both caused a significant reduction in the tensile bond strength of Mucopren to acrylic resin; however, in the thermocycled group, the bond strength increased with the increase in the concentration of SNPs (p < 0.001). Conclusion Addition of SNPs to Mucopren soft silicone liner reduces its tensile bond strength to denture acrylic resin.

Quality of Life, Satisfaction, Occlusal Force, and Halitosis after Direct and Indirect Relining of Inferior Complete Dentures

“…The score for the satisfaction questionnaire with the relining in the final time point (after 180 days) was negatively influenced by reliner material in both techniques, in a way that there was a perception that parts of the relining material had come loose from the base of the inferior denture, probably due to the lack of chemical union between these materials. 2,20,27,28 In the last two time points (90 and 180 days) of the evaluation, the occlusal force of the patients significantly greater when compared with the initial time point, for both techniques, and for the three regions evaluated (p < 0.05; ►Table 3). This probably occurred since the effort, capacity, and the muscular force increased due to the inferior complete denture having good retention and stability after the relining.…”

“…The score for the satisfaction questionnaire with the relining in the final time point (after 180 days) was negatively influenced by reliner material in both techniques, in a way that there was a perception that parts of the relining material had come loose from the base of the inferior denture, probably due to the lack of chemical union between these materials. 2 20 27 28 …”

Nanoparticles in Prosthetic Materials

“…Vimbela et al .,[ 15 ] in 2017, investigated the antimicrobial properties, with four different concentrations of Ag nanoparticles 1, 2, 3and 5 (wt%) and proved significant reduction of C. albicans at 5wt% in resins and liners. Habibzadeh., et al .,[ 16 ] in 2020 investigated three different silver concentrations of 0.3, 0.8 and 1.6 (wt%), in PMMA where 0.8 and 1.6 (wt%) showed reduction in flexural strength and elastic modulus of resins.…”

Peel bond strength between a silicone-based soft liner and a heat-cured acrylic resin denture base reinforced with three concentrations of metal oxide nanoparticles

“…A power analysis was performed based on a previous study [21] using G*Power software (v3.1.9.2) to calculate the sample size. The power value was 95%, and the α level of significance was 0.05.…”