Reverse scan body: A retrospective clinical study with 30 edentulous jaws.

PURPOSE: To evaluate the accuracy of fit of full-arch zirconia prostheses fabricated using a fully digital workflow with extraoral scanning with the reverse scan body protocol.

MATERIALS AND

METHODS

This retrospective study included 30 patients treated with zirconia full-arch implant-supported fixed complete dental prostheses (IFCDPs). Out of these 30 patients, 15 patients received IFCDPs supported by four implants, and the other 15 received IFCDPs supported by six implants. Each patient underwent full-arch implant rehabilitation with digital workflow using the reverse scan body protocol. Digitally designed verification jigs and prototypes were milled and used to confirm the accuracy of the scan, esthetics, and phonetics for each patient. Following the verification jig, monolithic zirconia IFCDPs were milled, assessed for fit, and delivered. Fit accuracy was evaluated through screw resistance test, visual examination, and radiographs.

RESULTS

All 30 milled prostheses (100%) achieved an accurate fit under clinical and radiographic assessment.

CONCLUSION

Full-arch zirconia prostheses with an accurate fit can be fabricated using extraoral scanning with the reverse scan body protocol.