Abstract
Curcumin-mediated Photodynamic Inactivation (PDI) has shown great potential to disinfect specific sites on tooth enamel but may involve contact with restorative materials. Thus, before use in dentistry, it is necessary to investigate whether the PDI protocol causes undesirable changes in the surfaces of aesthetic restorative materials and dental enamel. This study investigated the effect of PDI mediated by curcumin (CUR) in a liquid crystal precursor system on color stability (ΔE), surface roughness (Ra), and microhardness (kgf) of three different composite resins and bovine dental enamel specimens. The microhardness and roughness readings were performed 60 days after the treatments while the color readings were performed immediately, 24, 48, and 72 h, 7, 14, 21, 30, and 60 days after the treatments. Results showed that CUR mediated-PDI does not seem to have the potential to promote any esthetic or mechanical changes to the surface of tooth enamel and can be applied safely in clinical practice. However, the results on color, roughness, and hardness obtained for composite resins show that some negative effects can be produced, depending on the type of restorative material; more experiments must be performed with different formulations and, perhaps, with lower concentrations of CUR.
Highlights
Caries is still the most common disease in the world with 3.5–5 billion people suffering from it [1], and remains the main reason for tooth loss by, mainly, the reduction of mechanical properties [2,3]
Variability resulted in broad CIs limits, which is more noticeable for the Amelogen® Plus (AML) resin
Composite resins are restorative materials used in dental restorations after the removal of carious tissue
Summary
Caries is still the most common disease in the world with 3.5–5 billion people suffering from it [1], and remains the main reason for tooth loss by, mainly, the reduction of mechanical properties [2,3]. Microorganisms are associated with the development of caries and other oral conditions, such as periodontal and endodontic diseases, oropharyngeal candidiasis, prosthetic stomatitis, bad breath, and peri-implantitis [2,4,5,6,7]. These microorganisms colonize dental and prosthetic structures through biofilm formation, the main factor associated with the development of oral infections [8]. It is known that the lack of an overview is what causes the main
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