Publicación: Evaluación de la adhesión bacteriana a la superficie de arcos de acero inoxidable de uso ortodóncico modificados siguiendo un enfoque biomimético
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Objective: To evaluate the bacterial adhesion to the surface of orthodontic modified stainless steel arches following a biomimetic approach. Introduction: The formation and maturation of oral biofilm on dental surfaces and components of orthodontic appliances are the primary cause of a large number of oral diseases and deterioration of materials. Numerous alternatives have been proposed to decrease bacterial adhesion to materials, including modification of the surface of the materials. There are several techniques to modify the surface of materials, including photolithography and soft lithography. These techniques have been evaluated in different areas and have shown their effectiveness in modifying various surfaces and a reduction in bacterial adhesion to said modified surfaces has been observed. Despite the published results, these types of strategies have not been sufficiently studied in the area of dentistry, in general, and of orthodontics, in particular. Therefore, it is proposed to evaluate the reduction in bacterial adhesion to the surface of modified orthodontic stainless steel arches following a biomimetic approach, which could contribute to improve the compatibility of the materials used in orthodontics. Materials and Methods: The study was previously approved by the ethics committee of the Universidad Cooperativa de Colombia. The experimental group consisted of fragments of 316L stainless steel wire of dimensions 0.017 x 0.025 inches and 10 mm in length. For the soft lithography technique, a stamp of polydimethylsiloxane (PDMS) was made, which was used to duplicate the leaf of the Colocasia plant. For the transfer of the topography of the leaf to the orthodontic wires, silica sol synthesized by the sol-gel method of a phase was used. Fragments of wire of equal dimensions were used without modification as a control group. The surface of the modified and unmodified wires was characterized by hydrophobicity and roughness. The characterization of the bacterial adhesion to the surface of the modified and unmodified wires was carried out with Streptococcus mutans Results and conclusions: The transfer of patterns of the colocasia to the fragments of stainless steel arches using the silica sol was successful. Statistically significant differences were presented regarding the contact angle and roughness between the treated and untreated arches. A significant reduction in the adhesion of Streptococcus mutans to the modified wires was also found.