The invention provides a method for creating a physical teeth model comprising providing a virtual three dimensional (3D) image of a patient's dentition or part of it; and preparing a physical model of the jaws, based on information from said virtual 3D image, wherein said physical model is a positive model or a negative model from which a positive working model can be produced, said model comprising two members, one representing the upper jaw and the other the lower jaw, and both members are produced with markings or an alignment arrangement to permit proper occlusion alignment of the two members of said positive working model.