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Clinical Oral Investigations

, Volume 16, Issue 3, pp 977–985 | Cite as

Five-year prospective clinical study of posterior three-unit zirconia-based fixed dental prostheses

  • Roberto SorrentinoEmail author
  • Giorgio De Simone
  • Stefano Tetè
  • Simona Russo
  • Fernando Zarone
Original Article

Abstract

This prospective clinical trial aimed at evaluating the clinical performance of three-unit posterior zirconia fixed dental prostheses (FDPs) after 5 years of clinical function. Thirty-seven patients received 48 three-unit zirconia-based FDPs. The restorations replaced either a premolar or a molar. Specific inclusion criteria were needed. Tooth preparation was standardized. Computer-aided design/computer-assisted manufacturing frameworks with a 9-mm2 cross section of the connector and a 0.6-mm minimum thickness of the retainer were made. The restorations were luted with resin cement. The patients were recalled after 1, 6, 12, 24, 36, 48, and 60 months. The survival and success of the ceramics and zirconia were evaluated. The technical and aesthetic outcomes were examined using the United States Public Health Service criteria. The biologic outcomes were analyzed at abutment and contralateral teeth. Descriptive statistics were performed. All FDPs completed the study, resulting in 100% cumulative survival rate and 91.9% and 95.4% cumulative success rates for patients wearing one and two FDPs, respectively. No losses of retention were recorded. Forty-two restorations were rated alpha in all measured parameters. A minor chipping of the ceramics was detected in three restorations. No significant differences between the periodontal parameters of the test and control teeth were observed. Five-year clinical results proved that three-unit posterior zirconia-based FDPs were successful in the medium term for both function and aesthetic. Zirconia can be considered a promising substitute of metal frameworks for the fabrication of short-span posterior prostheses.

Keywords

Zirconia All ceramic Prosthodontics Fixed dental prostheses (FDPs) 

Notes

Acknowledgments

The authors would like to thank Nobel Biocare for supporting the present research and the dental laboratory “Estetica Dentale” by Mr. Ugo Castaldo (Naples, Italy) for the technical support.

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Roberto Sorrentino
    • 1
    • 3
    Email author
  • Giorgio De Simone
    • 1
  • Stefano Tetè
    • 2
  • Simona Russo
    • 1
  • Fernando Zarone
    • 1
  1. 1.University “Federico II” of NaplesNaplesItaly
  2. 2.University “G. D’Annunzio” of ChietiChietiItaly
  3. 3.NaplesItaly

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