A digital protocol for the fabrication of anatomic-contour implant zirconia crowns directly screwed on external hexagonal implant connections without the interposition of a Ti-base component

Elsevier

Available online 9 March 2023

The Journal of Prosthetic DentistryAuthor links open overlay panel, , , , Abstract

A straightforward and effective restorative option is proposed for implant-supported fixed prostheses with external connections by using monolithic zirconia without the interposition of a Ti-base component. The technique is based on a modification of the Brånemark connection used to link metal-ceramic or metal-composite resin restorations directly to the implant.

Section snippetsTechnique

A step-by-step procedure for fabricating zirconia crowns and FPDs screwed directly onto external hexagonal connections is described with some key points for the success of this approach.

1.

Make an intraoral scan (TRIOS 4; 3Shape A/S) of single or multiple implants using the corresponding scan bodies (SCAN BODY AQ; New Ancorvis Srl) and send them to the dental laboratory technician. It is essential that the dental laboratory technician use a computer-aided design (CAD) software program that

Discussion

The use of a directly screwed zirconia connection on implants with an external hexagon presents some advantages. Eliminating abutments and Ti-base components allows straightforward and cost-effective fabrication procedures without risking decementation of the titanium components.

Additionally, the use of a highly biocompatible material in the mucosal tunnel contributes to enhanced tissue health and stability over time28 (Fig. 6).

The flat-to-flat connection is suitable for zirconia, with high

Summary

A prosthetic procedure over implants with conventional external hexagonal connections is described using monolithic zirconia without the interposition of a titanium component. This straightforward, cost-effective, and high-performing solution, both from an esthetic and a mechanical point of view, represents an additional therapeutic option for the dental practitioner.

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© 2023 by the Editorial Council for the Journal of Prosthetic Dentistry.

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