Abstract
The biomechanical behavior of the universal link (titanium base) prosthetic abutment with different heights in implant-supported restorations was evaluated. Forty regular implants (4 × 10 mm) in titanium were used, divided into two groups according to the abutment height (n = 20): 4.5 × 4 mm (short) and 4.5 × 5.5 mm (long). Using CAD/CAM technology, zirconia crowns were milled and cemented onto the prosthetic abutments. Half of the specimens were submitted to the initial maximum fracture load test in a universal testing machine. The long abutments presented fracture load (41.1 ± 6.96 kgf) statistically similar to the short abutments (49.5 ± 7.68 kgf). The other half of the specimens were submitted to mechanical cycling (2,000,000 cycles, 2 Hz with a stainless-steel antagonist with a diameter of 1.6 mm), following ISO 14801:2007. Subsequently, the survival of the specimens was evaluated using the survival analysis function, Kaplan–Meier and Mentel–Cox (log- rank) (p < 0.05). The finite element analysis was performed in similar conditions to those used for the in vitro test through computer-aided engineering software (version 19.2, ANSYS Inc., Houston, TX, USA). The biomechanical behavior of both models was similar regardless of the evaluated structure of the set. It was concluded that both short and long abutment presents promising fatigue behavior and stress distribution for use in long-term implant-supported restorations.
Original language | English |
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Article number | 2025 |
Pages (from-to) | 1-17 |
Number of pages | 17 |
Journal | Metals |
Volume | 12 |
Issue number | 12 |
Early online date | 25 Nov 2022 |
DOIs | |
Publication status | Published - Dec 2022 |
Bibliographical note
Publisher copyright:© 2022 by the authors.
Funding
This research was funded by the São Paulo Research Foundation (FAPESP grant numbers 2019/24903-6 and 2021/11499-2).
Funders | Funder number |
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Fundação de Amparo à Pesquisa do Estado de São Paulo | 2021/11499-2, 2019/24903-6 |