Altered reverse impression method involving extraoral digitalization of a verification jig for the fabrication of implant-supported prosthesis by using a complete-digital workflow.

The reverse impression method involves the extraoral digitalization of the interim implant-supported prostheses and intraoral digitalization of antagonist arch and maxillomandibular relationship. This technique allows the fabrication of implant-supported prostheses by using a complete-digital workflow. The scan analogs make the reverse impression method feasible. However, this method may not be recommended if the interim polymethyl methacrylate prosthesis does not have passive fit. The present manuscript describes an altered reverse impression technique that involves the extraoral digitalization of a conventional verification jig, which has attached scan analogs. With this technique modification, the implant positions captured using the verification jig are used to obtain the virtual definitive implant cast and fabricate the definitive implant-supported prosthesis.

A modified reverse impression technique for capturing and transferring soft-tissue information.

The reverse impression technique consists of the extraoral digitalization of an implant-supported interim prosthesis by placing scan analogs in an interim implant-supported prosthesis. The technique facilitates the recording of implant and tooth positions and allows the digitalization of the volumetric dimensions of the interim restoration. However, it is not able to register soft tissue changes during the healing process. A modified reverse impression technique is described to facilitate capturing the current dimensions and soft tissue information at the time of the definitive implant scan. Additionally, the modified technique includes the use of a verification device. The extraoral digitalization of the verification device minimizes complications caused by the lack of passive fit of the milled interim polymethyl methacrylate prosthesis.

Using an additively manufactured natural head position reference device to transfer the horizon orientation plane and integrate it with a 3-dimensional virtual patient: A dental technique.

A virtual patient is obtained by aligning a patient's digital information, including facial and intraoral digital scans with or without hard tissue information from a cone beam computed tomography scan. However, while computer-aided design programs facilitate virtual patient integration, they do not provide a way to relate the horizon orientation with the patient's horizontal and vertical facial references. The present technique describes a way of relating the horizon orientation plane to the natural head position of the patient. An additively manufactured natural head position reference device was used to transfer the horizon orientation plane to the 3-dimensional virtual patient.