Are Monolithic 3Y-TZP Zirconia Crowns Too Strong for Titanium Implants?

Gueth, Jan-Frederik; Schweiger, Josef; Graf, Tobias; Stimmelmayr, Michael; Schubert, Oliver und Erdelt, Kurt (2022): Are Monolithic 3Y-TZP Zirconia Crowns Too Strong for Titanium Implants? In: International Journal of Prosthodontics, Bd. 35, Nr. 4: S. 509-511

Abstract

Purpose: To assess whether material choice for the prosthetic component of an implant restoration influences the failure mode in case of occlusal overload in monolithic restorations fabricated from high-strength ceramics on titanium implants. Materials and Methods: Within this pilot study, finite element analysis (FEA) was conducted to simulate stress and deformation of implant-supported crowns fabricated from lithium disilicate (LiS2) and zirconia (3Y-TZP). Additionally, an in vitro load-to-failure test was conducted using two specimens per group to evaluate the failure mode and to confirm the findings from the FEA. Results/Conclusion: FEA revealed stress areas at the palatal cervical areas of the crowns. In the load-to-failure test, both LiS2 hybrid abutment crowns fractured (410 N and 510 N) before plastic deformation of the metal implant components could be detected. The 3Y-TZP monolithic hybrid abutment crowns did not fracture until the tests were interrupted at 646-N and 690-N occlusal force, when plastic deformation of the metal implant components was visually observed.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Medizin
• Themengebiete: 600 Technik, Medizin, angewandte Wissenschaften > 610 Medizin und Gesundheit
• ISSN: 0893-2174
• Sprache: Englisch