A Novel Impression Technique for Transforming an Acrylic Hybrid Prosthesis into a Metal Ceramic One Using Combined Analog and Digital Workflows

Aim and objective: This technique describes a novel method for converting an acrylic hybrid into metal-ceramic using a combined digital and analog workflow. Background: Although the acrylic hybrid prosthesis treatment modality has been consistently used for decades, complications such as occlusal wear and tooth debonding have brought to light other alternative restorative materials such as the use of zirconia or a metal framework layered with ceramic. Developing a technique that allows clinicians to convert existing acrylic prostheses easily and conveniently into metal-ceramic ones would overcome many of the complications associated with current acrylic hybrids. Technique: A combined digital and analog workflow are utilized to convert an acrylic hybrid into a metal-ceramic one by making a repositioning impression with the existing prosthesis maintaining the interface fit for the new prosthesis. The metal framework of the new prosthesis was designed and manufactured digitally. After layering the framework with ceramic, the prosthesis is evaluated for ideal fit, occlusion, and esthetics before delivery. Conclusion: The combined analog and digital workflow for converting an acrylic hybrid to a metal-ceramic prosthesis through a pick-up impression reduces overall chairside time and provides a predictably fitting prosthesis.