Evaluation of Candida albicans formation on feldspathic porcelain subjected to four surface treatment methods

Abstract

Candida albicans, known for its adhesion on prosthetic materials and oral tissues, is the most frequently encountered fungal infection in dentistry. The aim of this study was to evaluate the effects of four different surface treatment methods and immersion in artificial saliva on the surface roughness of and candida adhesion on dental porcelains. The four surface treatment methods were namely: natural glaze, overglaze, dual ion exchange, and polishing. Surface roughness of porcelain was evaluated using a surface profilometer and by SEM. Candida adhesion was examined by culturing two Candida strains on porcelain specimens followed by a colorimetric method using XTT/Coenzyme Q0. It became evident that Candida adhesion was found more in the specimens treated with natural glaze and polishing. Further, by the visual inspection of SEM images and comparison of surface roughness, polished and naturalglazed specimens showed rougher surface characteristics than overglazed and dual-ion-exchanged specimens.

Changes to Glazed Dental Ceramic Shade, Roughness, and Microhardness after Bleaching and Simulated Brushing

“…Furthermore, the glazing process reduces porosity on the surface of the ceramic material 9,47 and the lower the roughness on such surfaces, the lower the risk of micro-organism colonization, e.g., Candida albicans from the intraoral environment. 45 Brushing, on the other hand, did not alter hardness on the glazed feldspathic ceramic, perhaps due to its abrasive effect, which could consequently reflect on surface roughness. Regarding surface roughness, the null hypothesis was also rejected because prefabricated trays loaded with hydrogen peroxide at a concentration of 10% were able to induce the highest average roughness values on the glazed feldspathic ceramic surface, independent from brushing cycles.…”

“…The specimens were glazed to simulate a clinical scenario. Furthermore, the glazing process reduces porosity on the surface of the ceramic material and the lower the roughness on such surfaces, the lower the risk of micro‐organism colonization, e.g., Candida albicans from the intraoral environment . Brushing, on the other hand, did not alter hardness on the glazed feldspathic ceramic, perhaps due to its abrasive effect, which could consequently reflect on surface roughness.…”

Effect of Two Polishing Systems on Surface Roughness, Topography, and Flexural Strength of a Monolithic Lithium Disilicate Ceramic

“…20 Surface profilometry is suitable for quantitative assessment of surface roughness. 21 However, in some cases, the roughness values do not truly represent the actual topography of ceramic surfaces because only some areas, and not the whole surface, are probed by the profilometer. 22 Therefore, SEM has also been recommended to obtain more comprehensive results 22 since SEM provides high-resolution information regarding surface texture details and enhances qualitative assessment of surface topography.…”

Adhesion of Streptococcus mutans on glazed IPS e.max press, glazed feldspatic and dental enamel

“…In addition, surface deterioration will facilitate the involvement of plaque and microorganisms (Honorio et al 2008). Karayazgan et al (2010) reported that the level of adhesion of Candida albicans to the polished surface of feldspathic porcelain was 3.4 ± 0.25 colonies/mm 2 . In a similar study, enamel used as the control for assessment of the adhesion of Streptococcus mutans to uncoated and saliva-coated glass ceramics and composites (Kantorski et al 2008) and their report was consistent with the fi ndings of the current study.…”