CC BY 4.0 · Eur J Dent 2023; 17(01): 062-069
DOI: 10.1055/s-0041-1742124
Original Article

Fatigue Resistance of Cast-on Implant Abutment Fabricated with Three Different Alloys

Usanee Puengpaiboon
1   Department of General Dentistry, Faculty of Dentistry, Srinakharinwirot University, Bangkok, Thailand
,
Pavinee Padipatvuthikul Didron
1   Department of General Dentistry, Faculty of Dentistry, Srinakharinwirot University, Bangkok, Thailand
› Institutsangaben
Funding This study was financially supported by the Faculty of Dentistry, Srinakharinwirot University, Thailand (grant no. 3232/2018).

Abstract

Objectives This study aimed to evaluate fatigue resistance of cast-on implant abutment using three alloys.

Materials and Methods Forty specimens of implant-supported crowns were prepared; Group 1 (TA) stock titanium abutments, Group 2 (GS) abutment cast with 40% gold alloy, Group 3 (GP) abutment cast with palladium alloy, and Group 4 (CN) abutment cast with nickel–chromium alloy. Specimens were cyclic loaded at 20 Hz, starting from 200 N (5,000 cycles), followed by stepwise loading of 400, 600, 800, 1,000, 1,200, 1,400, 1,600, and 1,800 N (30,000 cycles/step). Specimens were loaded until failure or reached 245,000 cycles.

Statistical Analysis The withstand cycles were analyzed using one-way analysis of variance and Weibull survival analysis. Fracture surfaces were examined using scanning electron microscopy.

Results The results of withstand cycles were TA (189,883 ± 22,734), GS (195,028 ± 22,371), GP (187,662 ± 22,555), and CN (200,350 ± 30,851). The statistical analysis showed no significant difference between the groups (p = 0.673).

Conclusion Although CN has higher Weibull characteristic strength which means greater durability, its lower Weibull modulus demonstrated less structural reliability. Consistent failures at implant fixture level were also found in CN group.



Publikationsverlauf

Artikel online veröffentlicht:
23. Februar 2022

© 2022. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. (https://creativecommons.org/licenses/by/4.0/)

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