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Comparative study of three composite materials in bonding attachments for clear aligners
Wener Chen1,2, Liwen Qian1,2, Yufen Qian1,2
1Department of Orthodontics, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medical, Shanghai, China.
Orthodontics & Craniofacial Research
|January 2, 2021
Summary
SonicFill demonstrated superior shear bond strength and wear resistance compared to Filtek Z350XT and Filtek Z350XT Flowable for clear aligner attachments. This composite material offers an optimized property combination for attachment fabrication.
Area of Science:
- Dental Materials Science
- Orthodontics
Background:
- Clear aligners are widely used for orthodontic treatment.
- Attachments are crucial for effective clear aligner therapy, requiring durable and accurately placed composite materials.
Purpose of the Study:
- To evaluate and compare the operational time, shear bond strength, placement accuracy, and wear resistance of three composite materials (Filtek Z350XT, Filtek Z350XT Flowable, and SonicFill) used for clear aligner attachments.
Main Methods:
- Three composite materials were tested on 129 human mandibular premolars.
- Evaluated parameters included operation time, shear bond strength, placement accuracy (3D deviation, volumetric change), and wear volume loss.
- Scanning Electron Microscopy (SEM) was used to assess bonding interfaces.
Main Results:
- SonicFill and Filtek Z350XT Flowable had shorter operation times than Filtek Z350XT.
- SonicFill exhibited significantly higher shear bond strength.
- Filtek Z350XT Flowable showed greater 3D deviation and volumetric change, indicating lower placement accuracy.
- SonicFill and Filtek Z350XT demonstrated less wear volume loss compared to Filtek Z350XT Flowable.
Conclusions:
- SonicFill presents a promising material for fabricating clear aligner attachments due to its favorable combination of properties.
- The material choice significantly impacts attachment performance, with SonicFill offering advantages in bond strength and wear resistance.
