Complete digital workflow for the production of implant-supported single-unit monolithic crowns

Authors

  • Tim Joda,

    Corresponding author
    1. Division of Fixed Prosthodontics, School of Dental Medicine, University of Bern, Bern, Switzerland
    2. Department of Prosthetic Dentistry, Center for Dental and Oral Medicine, University Hospital Hamburg-Eppendorf, Hamburg, Germany
    • Corresponding author:

      Dr Tim Joda DMD, MSc

      Division of Fixed Prosthodontics

      School of Dental Medicine

      University of Bern

      Freiburgstr. 7, CH-3010 Bern, Switzerland

      Tel.: +41 (0)31 / 632-0910

      Fax: +41 (0)31 / 632-4931

      e-mail: tim.joda@zmk.unibe.ch

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  • Urs Brägger

    1. Division of Fixed Prosthodontics, School of Dental Medicine, University of Bern, Bern, Switzerland
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Abstract

Objectives

The aim of this case series was to introduce a complete digital workflow for the production of monolithic implant crowns.

Material and methods

Six patients were treated with implant-supported crowns made of resin nano ceramic (RNC). Starting with an intraoral optical scan (IOS), and following a CAD/CAM process, the monolithic crowns were bonded either to a novel prefabricated titanium abutment base (group A) or to a CAD/CAM-generated individualized titanium abutment (group B) in premolar or molar sites on a soft tissue level dental implant. Economic analyses included clinical and laboratory steps. An esthetic evaluation was performed to compare the two abutment-crown combinations.

Results

None of the digitally constructed RNC crowns required any clinical adaptation. Overall mean work time calculations revealed obvious differences for group A (65.3 min) compared with group B (86.5 min). Esthetic analysis demonstrated a more favorable outcome for the prefabricated bonding bases.

Conclusions

Prefabricated or individualized abutments on monolithic RNC crowns using CAD/CAM technology in a model-free workflow seem to provide a feasible and streamlined treatment approach for single-edentulous space rehabilitation in the posterior region. However, RNC as full-contour material has to be considered experimental, and further large-scale clinical investigations with long-term follow-up observation are necessary.

Ancillary