Non-Thermal O<sub>2</sub> Plasma Efficacy on <i>C. albicans</i> and Its Effect on Denture Base Resin Color
Denture stomatitis is a disease involving <i>C. albicans</i>, which can affect elderly and immuno-compromised people. To avoid any recurrence of this pathology, it is necessary to treat patients regularly and disinfect dentures. However, the denture cleansers’ efficacy is not optimal and...
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| Auteurs principaux: | , , , , , |
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| Format: | article |
| Langue: | EN |
| Publié: |
MDPI AG
2021
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| Accès en ligne: | https://doaj.org/article/dee1acff33e84b509bf1044f5bac6811 |
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| Résumé: | Denture stomatitis is a disease involving <i>C. albicans</i>, which can affect elderly and immuno-compromised people. To avoid any recurrence of this pathology, it is necessary to treat patients regularly and disinfect dentures. However, the denture cleansers’ efficacy is not optimal and often leads to adverse color effects on the denture base resins. The aim of this study was to investigate the efficacy of a low-pressure non-thermal O<sub>2</sub> plasma (NTP) treatment on <i>C. albicans</i> seeded on ProBase<sup>®</sup>Hot resin (Ivoclar Vivadent). The viability reduction of <i>C. albicans</i> was assessed by colony forming units (CFU) analysis and by scanning electron microscopy (SEM). The effect of repeated treatments on the resin color was evaluated by spectrophotometry. The resin samples were placed in a sealed bag in which O<sub>2</sub> plasma was generated in low-pressure conditions. The results showed that a 120-min O<sub>2</sub> NTP treatment led to a 6-log reduction of <i>C. albicans</i> viability (<i>p</i> < 0.05) and to yeasts’ major alterations observed by SEM. Furthermore, significant slight color changes of the resin (∆E<sub>00</sub> = 1.33) were noted only after six plasma treatments (<i>p</i> < 0.05). However, the denture aesthetic was preserved, as the color changes were not perceptible and remained below the acceptability threshold (∆E<sub>00</sub> < 4). |
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