Abstract: Described is a protective visor, in particular for a safety device for the face of a user, made of transparent material and having a pair of recesses for positioning, in a position close to the eyes of a user, viewing and/or viewing amplification instruments.

Abstract: Described is a protective device for the face of a user, in particular for the eyes of a user, including a transparent visor designed to allow the user to see through the protective device and a supporting frame designed to allow the fixing of the protective device to the face of a user. The protective device has at least one opening designed to allow a passage of air from the inside to the outside and vice versa of an operating space defined, in use, by the protective device and by the face of the user. The protective device comprises a filtering device configured for filtering the air passing through said opening.

Abstract: A method and device for preparing the hard structures of teeth for the application of dental restorative materials, according to which, after a step of mechanical treatment to remove a layer of tissue from the hard structure of the tooth, at a given zone affected by a disorder, and after removing the debris generated by such treatment, a layer of an adhesive substance is spread over the zone using an application head connected by a wire in a support handpiece to a control power circuit able to generate electrical signals which subject the given zone to a difference in potential which subjects the adhesive substance to an electrokinetic force due to the passage of an electrical current able to move the adhesive substance in an even and deep way inside dentinal tubules and so that it occupies the irregular surface of the tooth enamel.

Abstract: A method and device for preparing the hard structures of teeth for the application of dental restorative materials, according to which, after a step of mechanical treatment to remove a layer of tissue from the hard structure of the tooth, at a given zone affected by a disorder, and after removing the debris generated by such treatment, a layer of an adhesive substance is spread over the zone using an application head connected by a wire in a support handpiece to a control power circuit able to generate electrical signals which subject the given zone to a difference in potential which subjects the adhesive substance to an electrokinetic force due to the passage of an electrical current able to move the adhesive substance in an even and deep way inside dentinal tubules and so that it occupies the irregular surface of the tooth enamel.