Abstract
Purpose
This study investigated the anti-Candida activity and the Shore A hardness of a tissue conditioner (Softone™) modified by incorporation of terpinen-4-ol and cinnamaldehyde.
Material and methods
Agar diffusion, microdilution, and mechanism of action methods were performed to determine to evaluate the antifungal activity of phytoconstituents. Then, phytoconstituents in varying concentrations were incorporated into the tissue conditioner. The anti-Candida effect of the modified conditioner was evaluated through agar punch well and biofilm formation methods. Shore A hardness of the experimental liners was evaluated after baseline, 24 h, 48 h, 4 days, and 7 days immersion on artificial saliva.
Results
The phytoconstituents incorporated into Softone showed completely inhibited fungal growth in concentrations of 20–40% and did not present significant antifungal activity until their concentrations where higher than 5%. There were differences between non-modified Softone and M5, M10, C10, and T10% (p < 0.05). The groups containing 10–40% of cinnamaldehyde incorporated into Softone were able to completely inhibit the biofilm. Concentrations below 40% of terpinen-4-ol showed unsatisfactory biofilm inhibition. The T40% and C40% groups presented the lowest Shore A hardness values. Hardness values from groups T40% at 7 days (p = 0.476); C40% at 4 days (p = 0.058); and T20% (p = 0.058), C20% (p = 0.205), T30% (p = 0.154), and C30% (p = 0.874) after 48 h did not differ from the control group.
Conclusions
Cinnamaldehyde incorporated into Softone inhibited Candida biofilm formation at concentrations of 10–40%, being more effective than terpinen-4-ol modification despite of halo inhibition observed by both products.
Clinical relevance
All modifications showed a very similar pattern of hardness being useful for clinical practice.
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de Fátima Souto Maior, L., Maciel, P.P., Ferreira, V.Y.N. et al. Antifungal activity and Shore A hardness of a tissue conditioner incorporated with terpinen-4-ol and cinnamaldehyde. Clin Oral Invest 23, 2837–2848 (2019). https://doi.org/10.1007/s00784-019-02925-w
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DOI: https://doi.org/10.1007/s00784-019-02925-w