Fatigue performance of 4YSZ: Effect of finishing/polishing protocol and surface treatments of the bonding surface
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View abstract on PubMed
Summary
This summary is machine-generated.Finishing and polishing 4YSZ zirconia reduces surface roughness but doesn't significantly impact fatigue when combined with surface treatments. Air abrasion, a surface treatment, significantly enhances fatigue performance more than polishing alone.
Area Of Science
- Dental Materials Science
- Biomaterials Engineering
- Surface Science
Background
- Computer-Aided Design/Computer-Aided Manufacturing (CAD/CAM) has revolutionized dental restorations.
- Zirconia-based ceramics, like 4YSZ, are widely used due to their mechanical properties.
- Understanding surface treatments is crucial for optimizing the longevity and performance of bonded restorations.
Purpose Of The Study
- To evaluate the impact of finishing/polishing protocols and surface treatments on the topographical characteristics of 4YSZ.
- To assess the fatigue behavior of 4YSZ after various surface modifications.
- To determine the optimal surface preparation for adhesively luting 4YSZ to resin substrates.
Main Methods
- Ninety 4YSZ discs underwent CAD/CAM grinding and were divided into six groups based on surface condition (finished/polished or not) and surface treatment (no treatment, air abrasion, or glaze spray).
- Surface roughness (Ra and Rz) was measured.
- Samples were adhesively luted to epoxy resin substrates and subjected to cyclic fatigue testing using a step-stress approach.
Main Results
- Finishing and polishing significantly reduced surface roughness (Ra and Rz).
- Air abrasion, with or without finishing/polishing, demonstrated superior fatigue performance compared to other groups.
- Glaze spray application, especially without finishing/polishing, resulted in inferior fatigue behavior.
Conclusions
- While finishing and polishing can minimize surface defects, its influence on 4YSZ fatigue behavior is less significant than surface treatments.
- Air abrasion is the most effective surface treatment for enhancing the fatigue performance of 4YSZ.
- Optimizing surface treatment is critical for improving the durability of adhesively bonded 4YSZ restorations.
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