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Antagonist wear of monolithic zirconia crowns after 2 years

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Abstract

Objectives

The aim of this study was to evaluate the amount of wear on the antagonist occlusal surfaces of clinically placed monolithic zirconia premolar and molar crowns (LAVA Plus, 3M ESPE).

Materials and methods

Fourteen in situ monolithic zirconia crowns and their opposing antagonists (n = 26) are the subject of an ongoing clinical trial and have been clinically examined at baseline and after 24 months. Silicone impressions were taken and epoxy replicas produced for qualitative SEM analysis and quantitative analysis using optical profilometry. Based on the baseline replicas, the follow-up situation has been scanned and digitally matched with the initial topography in order to calculate the mean volume loss (in mm3) as well as the mean maximum vertical loss (in mm) after 2 years in service.

Results

The mean volume loss for enamel antagonist contacts (n = 7) was measured to 0.361 mm3 and the mean of the maximum vertical loss to 0.204 mm. The mean volume loss for pure ceramic contacts (n = 10) was measured to 0.333 mm3 and the mean of the maximum vertical loss to 0.145 mm. The wear rates on enamel contacts were not significantly different from those measured on ceramic antagonists.

Conclusions

Based on the limitations of this study, it can be concluded for the monolithic zirconia material LAVA Plus that the measured wear rates are in consensus with other in vivo studies on ceramic restorations. Further, that no significant difference was found between natural enamel antagonists and ceramic restorations as antagonists. The monolithic zirconia restorations do not seem to be affected by wear within the first 2 years.

Clinical relevance

The monolithic zirconia crowns (LAVA Plus) show acceptable antagonist wear rates after 2 years in situ, regardless of natural enamel or ceramics as antagonist materials.

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Authors and Affiliations

  1. Research Laboratory for Dental Biomaterials, Dental Clinic 1, Universitätsklinikum Erlangen, Erlangen, Germany

    Ulrich Lohbauer

  2. Department of Prosthodontics and Biomaterials, Centre of Implantology, Universitätsklinik Aachen, Aachen, Germany

    Sven Reich

Authors
  1. Ulrich Lohbauer
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  2. Sven Reich
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Corresponding author

Correspondence to Ulrich Lohbauer.

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Conflict of interest

The authors declare that they have no conflict of interest.

Funding

The study was financially supported by the 3M Oral Care Company, Seefeld, Germany. Author UL and author SR declare that they have no other financial relationship with 3 M Oral Care.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.

Informed consent

Informed consent was obtained from all individual participants included in the study.

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Lohbauer, U., Reich, S. Antagonist wear of monolithic zirconia crowns after 2 years. Clin Oral Invest 21, 1165–1172 (2017). https://doi.org/10.1007/s00784-016-1872-6

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  • DOI: https://doi.org/10.1007/s00784-016-1872-6

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