Comparative Evaluation of the Amount of Sorption and Solubility Seen in Soft Liner with Herbal and Commercially Available Denture Cleanser - An In vitro Study

Aims: the aim of the current study is to assess the quantity of sorption and solubility seen in the soft denture liner with herbal (neem) and commercially (clinsodent) available denture cleanser. Materials and Methods: The cross sectional study was carried out in the Department of Prosthodontics at Sharad Pawar Dental College And Hospital between February 2021 and July 2021. 52 samples of heat cured acrylic resin of circular shape were prepared using a stainless steel mould. The resilient liner was applied to all the samples using a denture adhesive. All samples will then be desiccated for 24 hours to get a stable or conditioned weight W1. The samples will then be divided into 2 groups namely: Group A (clinsodent group) and the Group B (herbal denture cleanser group). All the samples were immersed daily in cleanser for 8 hour and then transferred to artificial saliva for rest 16 hours of the day. Solutions of artificial saliva and denture cleanser was changed daily for the entire period of study that is 7 days. Later, all the test samples were removed from saliva, wiped dry, weighed for saturated weight W2. - After desiccating again for 24 hours the samples were again assessed for renovated weight that is W3. Results: With respect to sorption and solubility it was found that the clinsodent group exhibited greater percentage of sorption when compared to the neem denture cleanser group after a period of 7 days, p-values of 0.0001,S. Conclusion: It can be established that the solubility and sorption values of clinsodent group were higher when compared to the herbal denture cleanser group. Overall, neem in the form of denture cleanser performed better than clinsodent.

Evaluating the Effect of Artemisia Aerial Parts Extracts on Candida albicans growth and Shear Bond Strength of Soft Denture Liner

After a period of use in the oral cavity the bond between denture base and soft denture liner weaken or fails creating a suitable environment for fungal colonization. Traditional medical plants that have antifungal agents are considered more safe and with few side effects. The objective of this study was to evaluate the effect of oil and ethanol extracts of Artemisia aerial parts on Candida albicans growth and shear bond strength of soft denture liner. Candida albicans species were isolated and diagnosed, oil and ethanol extracts of Artemisia were prepared, the effect of the extracts on Candida albicans were tested by agar well diffusion test and micro dilution test. Finally, 30 specimens of soft denture liner were prepared for testing shear bond strength by Universal Instron machine before and after incorporation of the extracts. The results showed that all the concentrations of oil extract inhibit the growth of Candida albicans except (12.5 mg/ml) and there were significant differences (P≤0.05) between all concentrations compared with Nystatin except between (100 and Nystatin) mg/ml in which there were no significant difference. In ethanol extract only the concentrations (100 and 75) mg/ml inhibited the growth of Candida albicans and there were significant differences between all concentrations (P≤0.05) with Nystatin, while shear bond strength was increased in ethanol extract and there were significant differences with the control (P≤0.05), but it was not affected in oil extract and there were no significant differences with the control (P>0.05). Interestingly, it’s concluded that oil and ethanol extracts of Artemisia aerials parts had an effect on Candida albicans, while shear bond strength was not affected by oil extract but increased in ethanol extract.

Evaluation of Antimicrobial and Antibiofilm Activities of Copper Oxide Nanoparticles within Soft Denture Liners against Oral Pathogens

Objectives. Soft denture liners provide a favorable environment for adhesion and colonization of microorganisms. This in vitro study aimed to examine the efficacy of different concentrations of copper oxide nanoparticles (CuO NPs) incorporation into soft denture liner on the biofilm formation of the microbial species. Methods. Field Emission Scanning Electron Microscopy (FESEM) images from NPs were recorded. Antifungal susceptibility testing of CuO NPs against five standard strains of Candida albicans (CBS 10261, 1905, 1912, 1949, 2730), Streptococcus mutans (ATCC35668), Streptococcus sobrinus (ATCC27607), and Streptococcus salivarius (ATCC9222) was performed by the broth microdilution method with the Clinical and Laboratory Standards Institute reference method. The biofilm inhibition percentages of CuO NPs on the soft denture liners were determined by XTT assay. Results. The characterization of CuO NPs by scanning electron microscope (SEM) analyses confirmed the synthesis of NPs with appropriate structure and size with a mean diameter of 18.3 ± 9.1 nm. The CuO NPs successfully inhibited the growth of the tested standard strains of C. albicans and Streptococcus spp. at concentrations ranging from 64 to 128 µg mL−1. Indeed, incorporation of CuO NPs at a concentration of 500 µg mL−1 into the soft denture liners exhibited a significant activity (75%) in inhibition of C. albicans. biofilm formation in a dose-dependent manner. The biofilm formation of C. albicans in the presence of CuO NPs was lower than Streptococcus spp. in comparison with the control group ( p < 0.05 ). Conclusion. Incorporation of CuO NPs significantly decreased the colonization and plaque formation of the oral pathogens, especially C. albicans accumulation. These NPs may be useful as a promising agent for the antimicrobial management of soft denture liner materials.

Effect of mandibular complete dentures relining on occlusal force distribution using T-scan system

Background This study aimed to evaluate the effect of mandibular complete dentures relining using soft relining material on the distribution of various occlusal forces using T-Scan system. Fifty completely edentulous patients having their conventional complete dentures earlier fabricated and utilized were selected for this study. Patients were controlled diabetics, characterized by having their residual alveolar ridges moderately developed and lined with firm mucoperiosteum. Mandibular complete dentures were relined with soft denture liner and T-Scan device was used for occlusal force distribution measurement prior to denture relining and three months thereafter the relinning procedure. Results Comparison between occlusal forces percentages before and after denture relining revealed that occlusal forces percentages was significantly lower after denture relining in anterior area, significantly higher after denture relining in right posterior area, where it was insignificantly higher after relining in left posterior area. Conclusions Our findings revealed that the use of soft denture liner for mandibular complete denture relining significantly improved the occlusal load distribution. Clinical trial registration Trial registration NCT, NCT04701970. Registered 23/11/2020—Retrospectively registered, https://clinicaltrials.gov/ct2/show/NCT04701970

A Clinical Study of Improved Nitrile Butadiene Rubber Soft Lining Material and Acrylic Denture Base

ABSTRACT Relining of a complete denture essentially involves the recording of an impression within its support surface so as to correct the deficiency that has arisen as a result of tissues changes. Relining can be done simply, accurately and inexpensively by using lining material. In relining, a new thin layer of lining material is added to the existing denture base. Due to residual ridge resorption and irreversible changes in the tissues supporting, the prosthesis become loose and patient may complaint of frequent pain and ulceration. Relining can be done in such patients by using lining. A soft denture liner which is placed in a denture base that contacts tissues provides comfort. Resilient denture liners because of their viscoelastic properties act as shock absorber and reduce and distribute the stress on the denture bearing tissues. However, there is an increased probability of fungal growth on soft lining materials. Adherence of Candida to solid surface, such as denture resin or lining material has been thought to be the first step in successful colonization, subsequent plaque formation and development of pathogenesis. This study is done to find the adherence of Candida albicans to nitrile butadiene rubber (NBR) soft lining material and safe duration of its clinical usage. How to cite this article Bhandari AJ, Bhandari AJ. A Clinical Study of Improved Nitrile Butadiene Rubber Soft Lining Material and Acrylic Denture Base. Int J Prosthodont Restor Dent 2015;5(4):91-94.