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Materials 2015, 8(4), 1577-1589; doi:10.3390/ma8041577

All-Ceramic Single Crown Restauration of Zirconia Oral Implants and Its Influence on Fracture Resistance: An Investigation in the Artificial Mouth

1
Department of Prosthetic Dentistry, Center for Dental Medicine, University Hospital Freiburg, Albert-Ludwigs-University, Freiburg 79106, Germany
2
Private Practice, Singen 78224, Germany
3
Department for Medical Biometry and Medical Informatics, Institute for Medical Biometry and Statistics, Albert-Ludwigs-University, Freiburg 79104, Germany
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Ihtesham ur Rehman
Received: 23 February 2015 / Revised: 20 March 2015 / Accepted: 27 March 2015 / Published: 1 April 2015
(This article belongs to the Special Issue Dental Materials)
View Full-Text   |   Download PDF [1032 KB, uploaded 1 April 2015]   |  

Abstract

The aim of the current investigation was to evaluate the fracture resistance of one-piece zirconia oral implants with and without all-ceramic incisor crowns after long-term thermomechanical cycling. A total of 48 implants were evaluated. The groups with crowns (C, 24 samples) and without crowns (N, 24 samples) were subdivided according to the loading protocol, resulting in three groups of 8 samples each: Group “0” was not exposed to cyclic loading, whereas groups “5” and “10” were loaded with 5 and 10 million chewing cycles, respectively. This resulted in 6 different groups: C0/N0, C5/N5 and C10/N10. Subsequently, all 48 implants were statically loaded to fracture and bending moments were calculated. All implants survived the artificial aging. For the static loading the following average bending moments were calculated: C0: 326 Ncm; C5: 339 Ncm; C10: 369 Ncm; N0: 339 Ncm; N5: 398 Ncm and N10: 355 Ncm. To a certain extent, thermomechanical cycling resulted in an increase of fracture resistance which did not prove to be statistically significant. Regarding its fracture resistance, the evaluated ceramic implant system made of Y-TZP seems to be able to resist physiological chewing forces long-term. Restauration with all-ceramic single crowns showed no negative influence on fracture resistance. View Full-Text
Keywords: zirconia implants; Y-TZP; fracture load; bending moment; artificial ageing zirconia implants; Y-TZP; fracture load; bending moment; artificial ageing
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Kohal, R.-J.; Kilian, J.B.; Stampf, S.; Spies, B.C. All-Ceramic Single Crown Restauration of Zirconia Oral Implants and Its Influence on Fracture Resistance: An Investigation in the Artificial Mouth. Materials 2015, 8, 1577-1589.

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