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Fatigue Resistance of Customized Implant-Supported Restorations
Ulysses Lenz1, Renan Brandenburg Dos Santos1, Megha Satpathy2
1Postgraduate Program in Dentistry, School of Dentistry, University of Passo Fundo, Passo Fundo 99052-900, RS, Brazil.
Materials (Basel, Switzerland)
|July 30, 2025
Summary
Optimizing custom abutment (CA) design significantly enhances the mechanical reliability of dental implant restorations. Most custom abutment designs tested showed improved fatigue limits compared to the reference abutment, suggesting longer restoration lifetimes.
Area of Science:
- Biomaterials Science
- Mechanical Engineering
- Dental Implantology
Background:
- The mechanical reliability of implant-supported restorations is influenced by custom abutment (CA) design.
- Understanding the impact of design parameters on fatigue limit is crucial for improving restoration longevity.
Purpose of the Study:
- To evaluate how design parameters affect the fatigue limit of custom abutments (CA).
- To compare the fatigue performance of optimized custom abutment designs against a reference abutment (RA).
Main Methods:
- Digitalization of dental implant components using microcomputed tomography and cone beam computed tomography.
- Creation of a reverse-engineered reference abutment (RA) model and generation of 36 custom abutments (CAs) with dimensional variations using a Taguchi orthogonal array.
- Finite element analysis (FEA) in ABAQUS and fatigue limit estimation using Fe-safe, followed by ANOVA to identify influential parameters.
Main Results:
- Von Mises stress values ranged from 229 MPa to 302 MPa.
- 94.4% of the custom abutments (CAs) demonstrated a higher fatigue limit than the reference abutment (RA).
- Three specific design parameters were identified as significantly impacting the fatigue performance of the implant system.
Conclusions:
- The design process for custom abutments (CAs) involves critical parameters that can be optimized.
- Optimization of these parameters can lead to significantly longer lifetimes for implant-abutment restorations.
- Custom abutment design is a key factor in ensuring the mechanical reliability and durability of dental implants.
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