Planning models reflect the actual situation of the dentition and the mucosa-related jaw portion. Planning models are necessary before the start of treatment to ensure documentation of the initial, intermediate and final situation. They are a valuable component in forensic questions. As a standard, they are made of white hard plaster. The models must not only be free of bubbles, but must also reproduce all anatomical features of the jaws, i.e. teeth, folds, tuberosities, alveolar processes as well as palatal and lingual mucosal parts of the jaws. An exact occlusal setting is achieved in ambiguous situations by means of a situation bite. With a situation bite, a correct upper jaw to lower jaw or occlusion assignment of the models is possible. There are two options for fabricating the planning models, either 3 dimensional trimmed or socketed. Important: – Occlusal plane is parallel to the top and bottom of the model – Raphe median plane is perpendicular to the model or base back surface – When setting up the models, the final bite is possible in any position of the models – Reproduce the anatomical features of the jaw and tooth rows – The models must be marked with the patient’s name and increase, patient number, date of impression taking.