1. A system for use in fabricating a dental crown or dental bridge comprising: an articulator having a plurality of engagement pins and a physical teeth model comprising two members, a first member representing at least a part of an upper jaw and a second member representing at least a corresponding part of a lower jaw of a patient, said physical teeth model being made from a model material and further comprising: an alignment arrangement for permitting proper occlusion alignment of the two members of the physical teeth model, said proper occlusion alignment corresponding to a virtual three-dimensional data file representation of said patient's jaws and from the spatial relationship between said patient's jaws in occlusion, said alignment arrangement comprising a plurality of reference holes provided in said members for receiving in direct contact engagement pins of an articulator for providing engagement of the physical teeth model to the articulator via said pins.