A digital protocol to fabricate a maxillary bar-retained implant overdenture from a complete prosthesis using a...

Various methods have been described for fabricating standard or milled bars for implant overdentures. A challenge when using a digital workflow is the deviation of implant positions during intraoral scanner (IOS) data acquisition in edentulous arches, compromising passivity. Verifying implant positions digitally or conventionally is essential. This article presents a step-by-step protocol for digitally producing a maxillary bar-retained implant overdenture by scanning a duplicate of an adequate removable complete prosthesis or a new interim denture with scan analogs and using a reverse scanning technique to fabricate the definitive bar overdenture with a computer-aided design and computer-aided manufacturing (CAD-CAM) software program.