Related Experiment Video
Updated: Sep 14, 2025
07:42
Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
462
Multiparametric performance comparison of dental composites for clear aligner attachments
Yunlin Guan1,2, Jiarong Xu3, Junhong Qiu1,2
1School of Stomatology, Jiangxi Medical College, Nanchang University, Nanchang, 330000, Jiangxi, China.
BMC Oral Health
|July 19, 2025
Summary
This study evaluated three composites for clear aligner attachments, finding P60 superior in wear resistance and color stability, while Z350 offered high bond strength. Z250 showed poor color stability and durability.
Area of Science:
- Dental Materials Science
- Orthodontics
Background:
- Clear aligner technology (CAT) relies on composite attachments for retention and tooth movement.
- Systematic evaluation of these composites is crucial for optimizing CAT performance.
Purpose of the Study:
- To assess the color stability, shear bond strength (SBS), and durability of three light-cured composites (Filtek™ Z250 XT, Z350 XT, P60) for clear aligner attachments.
- To establish evidence-based criteria for selecting appropriate composite materials.
Main Methods:
- Composite attachments were bonded to premolars and subjected to simulated clinical conditions.
- Materials were tested for color stability after immersion in staining beverages (coffee, cola, iced tea).
- Shear bond strength (SBS), wear volume, surface roughness, and post-aging SBS were evaluated using statistical analysis.
Main Results:
- Filtek™ Z250 XT exhibited significant discoloration, exceeding clinical acceptability, especially with coffee.
- Filtek™ Z350 XT demonstrated the highest immediate SBS, potentially risking enamel damage.
- P60 showed superior wear resistance, lower surface roughness, and minimal post-wear defect volume, with good color stability.
Conclusions:
- P60 offers the best balance of color stability, wear resistance, and acceptable adhesive properties for diverse clinical needs.
- Z350 provides high SBS and color durability but carries a risk of enamel damage.
- Z250 is cost-effective but underperforms in color stability and durability, suggesting limited use.
