A method for providing an anatomical prototype, adapted to simulate the outcome of a treatment that can be performed on a subject, which consists in: a. applying to the face of the subject an instrument provided with at least one pair of reference elements arranged at a known distance; b. installing a retractor in the mouth of the subject and acquiring a first photograph of the face of the subject, which illustrates the reference elements and his or her current teeth; c. removing the retractor from the mouth of the subject and acquiring a second photograph of the face of the subject, in the same pose as the first photograph and illustrating the reference elements and his or her current teeth; d. subjecting the dental arches of the subject to optical scanning, in order to acquire information regarding dental occlusion and/or the anatomy of the arches; e. providing at least the photographs to at least one software application adapted to be run on an electronic processing device associated with a respective display, for the visualization of a first digital image and of a second digital image, which can be processed by the application and correspond respectively to the first photograph and to the second photograph; f. calibrating the software application on the basis of the known distance between the reference elements, which can be detected in the first image and/or in the second image; g. performing a facial analysis of the second digital image, for the identification of at least one parameter that describes the symmetry and proportions of the face and/or of the current teeth; h. tracing on the second digital image the internal profile of the lips, in order to delimit a graphic area of interest, which contains at least partially the current teeth; i. creating a digital representation of target teeth, which can be obtained as an outcome of the treatment to be performed on the subject as a replacement of the current teeth; j. visualizing the external contour of the target teeth, in order to verify the position and size of the target teeth with respect to the current teeth of the subject; k. replacing the graphical area of interest of the second digital image with the corresponding portion of the digital representation of the target teeth, on the basis of the at least one parameter identified in said step g.; l. providing a three-dimensional prototype of at least one portion of the target teeth, on the basis of the digital representation of the target teeth and of the information obtained in said step d.. a. applying to the face of the subject an instrument provided with at least one pair of reference elements arranged at a known distance; b. installing a retractor in the mouth of the subject and acquiring a first photograph of the face of the subject, which illustrates the reference elements and his or her current teeth; c. removing the retractor from the mouth of the subject and acquiring a second photograph of the face of the subject, in the same pose as the first photograph and illustrating the reference elements and his or her current teeth; d. subjecting the dental arches of the subject to optical scanning, in order to acquire information regarding dental occlusion and/or the anatomy of the arches; e. providing at least the photographs to at least one software application adapted to be run on an electronic processing device associated with a respective display, for the visualization of a first digital image and of a second digital image, which can be processed by the application and correspond respectively to the first photograph and to the second photograph; f. calibrating the software application on the basis of the known distance between the reference elements, which can be detected in the first image and/or in the second image; g. performing a facial analysis of the second digital image, for the identification of at least one parameter that describes the symmetry and proportions of the face and/or of the current teeth; h. tracing on the second digital image the internal profile of the lips, in order to delimit a graphic area of interest, which contains at least partially the current teeth; i. creating a digital representation of target teeth, which can be obtained as an outcome of the treatment to be performed on the subject as a replacement of the current teeth; j. visualizing the external contour of the target teeth, in order to verify the position and size of the target teeth with respect to the current teeth of the subject; k. replacing the graphical area of interest of the second digital image with the corresponding portion of the digital representation of the target teeth, on the basis of the at least one parameter identified in said step g.; l. providing a three-dimensional prototype of at least one portion of the target teeth, on the basis of the digital representation of the target teeth and of the information obtained in said step d..