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




All-Ceramic Single Crown Restauration of Zirconia Oral Implants and Its Influence on Fracture Resistance: An Investigation in the Artificial Mouth - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

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

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





Autor: Ralf-Joachim Kohal 1,†, Jolanta Bernadette Kilian 2,†, Susanne Stampf 3,† and Benedikt Christopher Spies 1,*

Fuente: http://mdpi.com/



DESCARGAR PDF




Documentos relacionados