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Extra-alveolar miniscrews: are all brands similar?
Karina Tostes Borsato1, Raissa Mariele Bernardino1, Lucas Arrais Campos2
1São Paulo State University, Dental School, Department of Pediatric Dentistry and Morphology (Araraquara/SP, Brazil).
Dental Press Journal of Orthodontics
|March 26, 2025
Summary
Five orthodontic miniscrew brands vary in thread design, length, and polishing. Clinicians should consider these factors, along with material, for optimal screw selection in orthodontic applications.
Area of Science:
- Orthodontics
- Biomaterials Engineering
- Dental Implantology
Background:
- A diverse range of extra-alveolar orthodontic miniscrews are commercially available.
- Understanding their design and mechanical properties is crucial for effective clinical application.
Purpose of the Study:
- To compare the design, topographical, and mechanical properties of five distinct commercial brands of extra-alveolar miniscrews.
- To provide data to aid clinicians in selecting appropriate miniscrews.
Main Methods:
- Utilized scanning electron microscopy (SEM) for topographical analysis.
- Conducted in-vitro mechanical tests including driving torque, torsion, and pullout tests.
- Evaluated 80 miniscrews (2 mm x 12 mm) across five brands: Bioray, DatSteel, Morelli, OBS, and Peclab.
Main Results:
- Significant variations in thread characteristics (pitch, diameter) and actual thread length were observed among brands.
- SEM revealed differences in surface polishing, with Morelli, OBS, and Peclab showing adequate results.
- Mechanical tests indicated differences in insertion vs. removal torque and high pullout resistance, with no significant material differences between titanium and steel.
Conclusions:
- The five studied orthodontic miniscrew brands exhibit distinct design and mechanical properties.
- Clinicians must carefully consider miniscrew size, thread characteristics, length, surface finish, and material composition when making treatment decisions.
