Clinical Implant Dentistry and Related Research

ARTICLE

Randomized Controlled Clinical Trial of All-Ceramic Single Tooth Implant Reconstructions Using Modified Zirconia Abutments: Radiographic and Prosthetic Results at 1 Year of Loading

Corresponding Author

Daniel S. Thoma PD Dr. med. dent.

Senior lecturer

Clinic of Fixed and Removable Prosthodontics and Dental Material Science, University of Zurich, Zürich, Switzerland

Corresponding Author: PD Dr. Daniel S. Thoma, Clinic of Fixed and Removable Prosthodontics and Dental Material Science, Center of Dental Medicine, University of Zurich, Plattenstrasse 11, 8032 Zürich, Switzerland; e-mail: [email protected]Search for more papers by this author

Francine Brandenberg Dr. med. dent.,

Francine Brandenberg Dr. med. dent.

Postgraduate student

Clinic of Fixed and Removable Prosthodontics and Dental Material Science, University of Zurich, Zürich, Switzerland

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Vincent Fehmer MDT,

Vincent Fehmer MDT

Clinic of Fixed and Removable Prosthodontics and Dental Material Science, University of Zurich, Zürich, Switzerland

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Dominik L.E. Büchi Dr. med. dent.,

Dominik L.E. Büchi Dr. med. dent.

Private practice

Private Practice, Chur, Switzerland

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Christoph H.F. Hämmerle Prof. Dr. med. dent.,

Christoph H.F. Hämmerle Prof. Dr. med. dent.

Professor and chair

Clinic of Fixed and Removable Prosthodontics and Dental Material Science, University of Zurich, Zürich, Switzerland

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Irena Sailer Prof. Dr. med. dent.,

Irena Sailer Prof. Dr. med. dent.

Professor and chair

Division of Fixed Prosthodontics and Biomaterials, Clinic of Dental Medicine, University of Geneva, Geneva, Switzerland

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Daniel S. Thoma PD Dr. med. dent.,

Corresponding Author

Daniel S. Thoma PD Dr. med. dent.

Senior lecturer

Clinic of Fixed and Removable Prosthodontics and Dental Material Science, University of Zurich, Zürich, Switzerland

Francine Brandenberg Dr. med. dent.,

Francine Brandenberg Dr. med. dent.

Postgraduate student

Clinic of Fixed and Removable Prosthodontics and Dental Material Science, University of Zurich, Zürich, Switzerland

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Vincent Fehmer MDT,

Vincent Fehmer MDT

Clinic of Fixed and Removable Prosthodontics and Dental Material Science, University of Zurich, Zürich, Switzerland

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Dominik L.E. Büchi Dr. med. dent.,

Dominik L.E. Büchi Dr. med. dent.

Private practice

Private Practice, Chur, Switzerland

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Christoph H.F. Hämmerle Prof. Dr. med. dent.,

Christoph H.F. Hämmerle Prof. Dr. med. dent.

Professor and chair

Clinic of Fixed and Removable Prosthodontics and Dental Material Science, University of Zurich, Zürich, Switzerland

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Irena Sailer Prof. Dr. med. dent.,

Irena Sailer Prof. Dr. med. dent.

Professor and chair

Division of Fixed Prosthodontics and Biomaterials, Clinic of Dental Medicine, University of Geneva, Geneva, Switzerland

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First published: 15 April 2015

https://doi.org/10.1111/cid.12333

Citations: 24

The authors report no conflict of interest.

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Abstract

Purpose

This study aims to test whether or not veneering of the submucosal part of zirconia abutments with pink dental ceramic affects radiographic and technical outcomes of implant-supported single crowns (ISSC).

Materials and Methods

Single tooth implants were randomly restored with either pink-veneered zirconia abutments (test; n = 10) or non-veneered zirconia abutments (control group; n = 10) and all-ceramic crowns. At baseline (crown insertion), and 6- and 12-month radiographic and technical evaluations were performed including standardized x-rays and modified United States Public Health Service criteria (technical). Survival and complication rates were assessed for implants and restorations. Robust linear mixed model analysis was performed to investigate the effect of group and time-point on radiographic outcomes.

Results

At 1 year, the survival rate for implants was 100% and 95% for ISSC. Most of the implants were placed subcrestally. Therefore, mean marginal bone levels decreased in both groups between implant insertion and baseline (p < .05), but then remained stable up to 1 year (test: 0.15 mm ± 0.42 mm; control 0.23 mm ± 0.63 mm) (p > .005). At 6 months, one minor chipping occurred in the test group. At 1 year, three crowns (control) exhibited occlusal roughness. In addition, one abutment fracture occurred (test). The differences between test and control group were not statistically significantly different for any of the evaluated outcome measures (p > .05).

Conclusions

Veneering of the submucosal part of zirconia abutments did not affect biological and technical outcomes of ISSCs. Technical complications of the reconstructions, however, were frequent, resulting in a rate of 75% of the crowns being complication free.

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Citing Literature

Volume18, Issue3

June 2016

Pages 462-472

Randomized Controlled Clinical Trial of All-Ceramic Single Tooth Implant Reconstructions Using Modified Zirconia Abutments: Radiographic and Prosthetic Results at 1 Year of Loading

Abstract

Purpose

Materials and Methods

Results

Conclusions

References

Citing Literature

References

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