To fabricate a new denture from an existing denture, the existing denture for a patient is sensed. The existing denture corresponds to one or more of a mandibular edentulous ridge, maxillary edentulous ridge, and palate of the patient. In addition, a model is generated of the one or more of the mandibular edentulous ridge, maxillary edentulous ridge, and palate and a wax arch of teeth is modulated in response to a sensed arch of the existing denture. Furthermore, a wax up is generated corresponding to the existing denture by filling a gap between the wax arch and the model and the new denture is fabricated corresponding to the existing denture by investment casting the wax up.