A model for teaching in dental disciplines, consisting of a structure that reproduces a part of the human or animal stomatognathic system, and comprising two or more areas (a, b...) with different mechanical properties, differentiated from each other by delimiting the different tissues that they reproduce and/or the natural or affected state of same and/or areas to be removed, which areas have at least a different density, based on the type and the discipline for which they are intended, providing realism and guidance when a student uses same for practice so as to make it easier to learn the work to be performed, wherein the structure of the model reproduces a model selected from: i) a tooth or several teeth integrated within an external body to be removed by means of subtraction techniques with cutting tools until said tooth or teeth is/are exposed, the density of which is different from the density which forms said tooth or teeth, constituting respectively the at least first and second areas (a, b) with different mechanical properties of different density, for learning dental anatomy; or ii) a tooth or group of temporary or permanent teeth in which there is contemplated at least a first area (a) with different mechanical properties, having a density different from the rest of the tooth or teeth forming a part to be removed by the student, and its shape, hardness, and density, as well as its colour, vary from the rest that must be preserved, for learning the opening of cavities and/or predefined dental preparations; or iii) a tooth or group of teeth in which there is contemplated at least a part with a caries lesion to be removed with cutting instruments which constitutes a first area (a) with different mechanical properties and different density with respect to the rest of said tooth in turn constituting a second area (b) with different mechanical properties, for learning the removal of carious dental tissue. characterized in that, in the variant for learning dental anatomy, the structure comprises two or more teeth or groups of teeth which are integrated, inside each other in different scales of proportion, from largest to smallest, within the external body so that they are successively exposed by means of subtraction techniques accessing teeth having smaller proportions or scales, said inner teeth constituting respective third and fourth areas (c, d) with different mechanical properties, which in turn have a different density with respect to each other and to the external body. i) a tooth or several teeth integrated within an external body to be removed by means of subtraction techniques with cutting tools until said tooth or teeth is/are exposed, the density of which is different from the density which forms said tooth or teeth, constituting respectively the at least first and second areas (a, b) with different mechanical properties of different density, for learning dental anatomy; or ii) a tooth or group of temporary or permanent teeth in which there is contemplated at least a first area (a) with different mechanical properties, having a density different from the rest of the tooth or teeth forming a part to be removed by the student, and its shape, hardness, and density, as well as its colour, vary from the rest that must be preserved, for learning the opening of cavities and/or predefined dental preparations; or iii) a tooth or group of teeth in which there is contemplated at least a part with a caries lesion to be removed with cutting instruments which constitutes a first area (a) with different mechanical properties and different density with respect to the rest of said tooth in turn constituting a second area (b) with different mechanical properties, for learning the removal of carious dental tissue.