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Load-bearing capacity of artificially aged zirconia fixed dental prostheses with heterogeneous abutment supports

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Abstract

Aim of this in vitro study was to investigate the effect of artificial ageing and differential abutment support on the load-bearing capacity of zirconia posterior four-unit fixed dental prostheses (FDPs). Thirty-six FDPs were fabricated using CAD/CAM technology and divided into three groups. Specimens in the first group were cemented onto tooth analogues with simulated periodontal resilience, in the second group onto a dental implant and a tooth analogue, but in the third group only onto implants. Half of the samples in each group underwent artificial ageing. Afterwards, all FDPs were loaded until bulk fracture in a universal testing machine. Load-displacement curves and forces at fracture were recorded and results were statistically analysed using ANOVA. Load-bearing capacities within the different test groups averaged as follows (control/artificially aged): tooth–tooth supported (2,009/1,751 N), tooth–implant supported (2,144/1,935 N) and implant–implant supported (2,689/2,484 N). Artificial ageing as well as differential abutment support did have a significant influence on the fracture strength of the zirconia FDPs. Implant-retained prostheses demonstrated the highest load-bearing capacity, while resilient support was demonstrated to be unfavourable. According to these in vitro results, zirconia four-unit prostheses may be promising for application in posterior areas with all three support scenarios (implant-assisted, tooth-retained, or implant–tooth-interconnected prostheses). However, the restorations’ mechanical strength may expected to be significantly influenced in situ by ageing of the material on the long term.

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Acknowledgements

This study was supported by the Institut Straumann AG, Basel, Switzerland, which is gratefully acknowledged.

Conflict of interest

The authors declare that they have no conflict of interest.

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Authors and Affiliations

  1. Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany

    Katia Sarafidou, Meike Stiesch, Daniela Jörn, Lothar Borchers & Philipp Kohorst

  2. Department of Orthodontics, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany

    Marc Philipp Dittmer

Authors
  1. Katia Sarafidou
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  2. Meike Stiesch
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  3. Marc Philipp Dittmer
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  4. Daniela Jörn
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  5. Lothar Borchers
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  6. Philipp Kohorst
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Correspondence to Katia Sarafidou.

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Sarafidou, K., Stiesch, M., Dittmer, M.P. et al. Load-bearing capacity of artificially aged zirconia fixed dental prostheses with heterogeneous abutment supports. Clin Oral Invest 16, 961–968 (2012). https://doi.org/10.1007/s00784-011-0569-0

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  • DOI: https://doi.org/10.1007/s00784-011-0569-0

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