A method for assessing the impact of a dental modification proposal on a temporomandibular joint of a patient, the method comprising: - loading a digital dental model of the patient on a computer running a simulation program of virtual articulator, - simulate one or more movements virtual functional in a patients jaw in said computer, - applying said dental proposed modification to the digital computer model, - simulate in that said computer one or more virtual functional movements to said dental modification proposed, wherein the method further comprises - providing, by said computer, information to a user on at least one associated with said one parameter or more virtual functional movements when said dental proposed modification is applied, selecting said at least one parameter among at least the amount of movement of the mandible certain direction, sees locidad which is carried out some movement of the jaw and an angle around which performs a rotational movement of the jaw, and wherein said information is for said assessment of said impact of said dental modification proposal for such joint temporomandibular said patient, wherein said at least one associated with said one parameter or more virtual functional movement is a displacement of a condyle of the patient, the method further comprising: - calculating by said computer a first displacement of said condyle for each said one or more virtual functional movements before applying said dental proposed modification to the digital model, - calculating by said computer a second displacement of said condyle for each of said one or more virtual functional movements after said application of said dental proposed amendment the digital model, - determines r by said computer a relative difference of condylar displacement relative to said second and said first displacement for each of said one or more virtual functional movements, - providing, by said computer, for each of said one or more said virtual functional movements
