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Tensile properties of orthodontic elastomeric chains
Marc Philipp Dittmer1, Anton Phillip Demling, Lothar Borchers
1Department of Orthodontics, Medical School Hanover, Hanover, Germany. dittmer.marc@mh-hannover.de
Summary
Tensile properties of orthodontic elastomeric chains vary significantly between manufacturers. This impacts the orthodontic force applied with labial or lingual appliances.
Area of Science:
- Biomaterials Science
- Orthodontics
- Dental Materials
Background:
- Orthodontic elastomeric chains are crucial for applying force in orthodontic treatments.
- Understanding their mechanical properties is vital for predictable treatment outcomes.
Purpose of the Study:
- To evaluate the tensile properties of orthodontic elastomeric chains from different manufacturers.
- To assess these properties using a standardized testing method (ISO 21606:2007).
Main Methods:
- Tensile testing of elastomeric chains from eight manufacturers (23 groups).
- Chains were extended to four times initial length, held, reduced, held, then extended to failure.
- Recorded forces (Fmax1, Fmin, Fmax2) and maximum length (Lmax) at failure.
Main Results:
- Significant differences were found in Fmax1, Fmin, Fmax2, and Lmax among manufacturers.
- Fmax1 ranged from 9.1 N to 23.2 N.
- Lmax varied from 425% to 629% of the initial length.
Conclusions:
- Tensile properties of orthodontic elastomeric chains differ significantly across brands.
- The choice of elastomeric chain impacts the applied orthodontic force with fixed appliances.
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