Effects of various denture cleansers on surface roughness of hard permanent reline resins

Abstract

The aim of this study was to investigate the influence of denture cleansers on surface roughness (Ra, µm) of two hard permanent reline resins and a conventional acrylic denture base resin. Fifty specimens of each material, measuring 10 mm×2 mm were randomly divided into 1 control and 4 experimental subgroups (n=10). Surface roughness values were measured using profilometer before and after immersion in distilled water and in 4 different denture cleansers for 8 h for 140 days. The Kruskal Wallis and Wilcoxon Signed Ranks tests were used for comparison among groups with a significance level of α=0.05. Immersion in denture cleansers significantly increased the surface roughness of reline resins and the difference among the cleansers was statistically significant (p=0.059). Denture cleansers can cause significant surface roughness alterations on hard permanent reline resins and denture base resin where their effect may differ according to the selected resin material.

Effect of toothbrush/dentifrice abrasion on weight variation, surface roughness, surface morphology and hardness of conventional and CAD/CAM denture base materials

“…Furthermore, if the roughness was measured only on the brushed area, it is possible to obtain a relatively high roughness value comparable with values obtained by other researchers 6,22,28) . Although chemical and mechanical cleaning methods have yielded significant sterilizing effect on denture bases 33) , they also produce some negative impacts. Out of these negative impacts, the surface roughness of the material has been mostly investigated because a higher roughness causes adherence and maturation of bacterial biofilm as well as the accompanying diseases 33) .…”

“…Although chemical and mechanical cleaning methods have yielded significant sterilizing effect on denture bases 33) , they also produce some negative impacts. Out of these negative impacts, the surface roughness of the material has been mostly investigated because a higher roughness causes adherence and maturation of bacterial biofilm as well as the accompanying diseases 33) . Therefore, it is important to select suitable denture materials and denture cleanser to ensure a good denture.…”

The effect of different chemical intra-oral prostheses cleansers on the surface properties of Parylene-coated PMMA

“…The roughening effect of cleansers was significantly evident with Steradent which produced the roughest uncoated PMMA surface. The increase in surface roughness caused by denture cleansers has been reported in the literature before, especially regarding alkaline peroxide-based solutions 26,28,37) . When the alkaline peroxide reacts with water it produces a solution of hydrogen peroxide and nascent oxygen.…”

“…Several studies have demonstrated the efficacy of denture cleansers to reduce biofilm formation, making them a necessary adjunct in removable prostheses hygiene 9,[22][23][24][25] . While denture cleansing agents can be important for maintaining denture hygiene and preventing colonization, they can have deleterious effects on the physical and mechanical properties of PMMA 26,27) , especially leading to an increase in surface roughness 28) . Surface roughness is defined as "the average absolute deviation of roughness irregularities from the main line over one sampling length" 29) .…”

Efficacy of newly developed denture cleaning device on physical properties of denture material and Candida biofilm

“…The problem with conventional denture cleansers is that they change the physical properties of the denture materials when used for long periods 22, 23, 24. PMMA disk as a denture base-resin was treated with the chemical cleanser and the denture cleaning device for 150 days, and the physical properties of the denture base-resin were analyzed.…”